/**
 * Admin JavaScript for Studiou WC Product Category Manager
 */
(function($) {
    'use strict';
    
    // Safe init wrapper - prevents one form's error from breaking others
    function safeInit(name, selector, initFn) {
        try {
            if ($(selector).length) {
                console.log('STUDIOU WC: ' + name + ' found, initializing');
                initFn();
            }
        } catch (e) {
            console.error('STUDIOU WC: Error initializing ' + name + ':', e);
        }
    }

    // Initialize admin scripts
    $(document).ready(function() {
        // Debug: Log that script is loaded
        console.log('STUDIOU WC: Admin script loaded v1.6.0');

        if (typeof studiouWcpcm === 'undefined') {
            console.error('STUDIOU WC: studiouWcpcm object is NOT defined - AJAX will not work');
            return;
        }

        console.log('STUDIOU WC: studiouWcpcm object:', studiouWcpcm);

        safeInit('Import form', '#studiou-wcpcm-import-form', initImportForm);
        safeInit('Export form', '#studiou-wcpcm-export-form', initExportForm);
        safeInit('Sample download', '#studiou-wcpcm-download-sample', initSampleDownload);
        safeInit('Product import form', '#studiou-wcpcm-product-import-form', initProductImportForm);
        safeInit('Product export form', '#studiou-wcpcm-product-export-form', initProductExportForm);

        // Category Manipulations page: the manipulation forms live inside
        // lazily-loaded tab partials, so they are initialised by the tab
        // controller after their partial is injected (see initManipulationTabs).
        safeInit('Manipulation tabs', '.studiou-wcpcm-tabs', initManipulationTabs);
    });

    /**
     * Initialize the tabbed Category Manipulations page.
     *
     * Each tab's markup is fetched on demand via the studiou_wcpcm_load_tab
     * AJAX handler. The first time a tab is opened its partial is rendered into
     * its own panel and its form handlers are wired; the panel is then kept in
     * the DOM (hidden) so switching tabs preserves both state and event
     * handlers - no re-fetch and no re-init.
     */
    function initManipulationTabs() {
        // Maps a tab slug to the init function that wires its partial's handlers.
        var TAB_INIT = {
            'move':              initMoveForm,
            'batch-description': initBatchDescriptionForm,
            'delete-products':   initDeleteProductsForm,
            'clear-media':       initClearMediaForm,
            'remove-unassigned': initRemoveUnassignedMediaForm,
            'upvp':              initUpdateVariantPricesForm,
            'notes':             null // static, nothing to wire
        };

        var i18n     = (studiouWcpcm && studiouWcpcm.i18n) ? studiouWcpcm.i18n : {};
        var $tabs    = $('.studiou-wcpcm-tabs .nav-tab');
        var $content = $('#studiou-wcpcm-tab-content');
        var loaded   = {}; // slug -> true once its panel exists in the DOM
        var allowed  = $tabs.map(function() { return $(this).data('tab'); }).get();

        function panelFor(slug) {
            return $content.children('.studiou-wcpcm-tab-panel[data-tab="' + slug + '"]');
        }

        function activate(slug) {
            if (allowed.indexOf(slug) === -1) {
                slug = allowed[0];
            }

            $tabs.removeClass('nav-tab-active')
                 .filter('[data-tab="' + slug + '"]').addClass('nav-tab-active');

            if (window.history && history.replaceState) {
                history.replaceState(null, '', '#' + slug);
            } else {
                window.location.hash = slug;
            }

            // Drop any stale loading / error placeholders, hide every panel.
            $content.find('.studiou-wcpcm-tab-loading, .studiou-wcpcm-tab-error').remove();
            $content.children('.studiou-wcpcm-tab-panel').hide();

            // Already loaded - just reveal its panel (handlers + state intact).
            if (loaded[slug]) {
                panelFor(slug).show();
                return;
            }

            $content.append('<div class="studiou-wcpcm-tab-loading">' +
                (i18n.tabLoading || 'Loading...') + '</div>');

            $.ajax({
                url: studiouWcpcm.ajaxUrl,
                type: 'POST',
                data: {
                    action: 'studiou_wcpcm_load_tab',
                    nonce: studiouWcpcm.nonce,
                    tab: slug
                },
                success: function(response) {
                    $content.find('.studiou-wcpcm-tab-loading').remove();

                    if (response.success && response.data && typeof response.data.html === 'string') {
                        // Stale click guard: only reveal if this tab is still active.
                        var stillActive = ($tabs.filter('.nav-tab-active').data('tab') === slug);

                        var $panel = $('<div class="studiou-wcpcm-tab-panel"></div>')
                            .attr('data-tab', slug)
                            .html(response.data.html);
                        $content.append($panel);
                        loaded[slug] = true;

                        var initFn = TAB_INIT[slug];
                        if (typeof initFn === 'function') {
                            try {
                                initFn();
                            } catch (e) {
                                console.error('STUDIOU WC: tab init "' + slug + '" failed', e);
                            }
                        }

                        if (stillActive) {
                            $content.children('.studiou-wcpcm-tab-panel').hide();
                            $panel.show();
                        } else {
                            $panel.hide();
                        }
                    } else {
                        var msg = (response.data && response.data.message) ||
                            (i18n.tabLoadError || 'Failed to load tab');
                        $content.append('<div class="studiou-wcpcm-tab-error">' + msg + '</div>');
                    }
                },
                error: function(xhr, status, error) {
                    console.error('STUDIOU WC: load_tab AJAX error:', status, error);
                    $content.find('.studiou-wcpcm-tab-loading').remove();
                    $content.append('<div class="studiou-wcpcm-tab-error">' +
                        (i18n.tabLoadError || 'Failed to load tab') + ': ' + error + '</div>');
                }
            });
        }

        $tabs.on('click', function(e) {
            e.preventDefault();
            activate($(this).data('tab'));
        });

        // Initial tab: a valid URL hash, otherwise the first tab.
        var initial = (window.location.hash || '').replace(/^#/, '');
        activate(allowed.indexOf(initial) !== -1 ? initial : allowed[0]);
    }
    
    /**
     * Initialize import form
     */
    function initImportForm() {
        $('#studiou-wcpcm-import-form').on('submit', function(e) {
            e.preventDefault();
            
            // Show spinner
            var $submitBtn = $(this).find('#studiou-wcpcm-import-button');
            var $spinner = $(this).find('.spinner');
            
            $submitBtn.prop('disabled', true);
            $spinner.css('visibility', 'visible');
            
            // Clear previous notices
            $('.studiou-wcpcm-notice-area').empty();
            
            // Create form data
            var formData = new FormData(this);
            formData.append('action', 'studiou_wcpcm_import');
            formData.append('nonce', studiouWcpcm.nonce);
            
            // Send AJAX request
            $.ajax({
                url: studiouWcpcm.ajaxUrl,
                type: 'POST',
                data: formData,
                processData: false,
                contentType: false,
                success: function(response) {
                    if (response.success) {
                        showNotice('success', studiouWcpcm.i18n.importSuccess);
                        
                        // Show results
                        $('#studiou-wcpcm-import-results').text(response.data.message);
                        $('.studiou-wcpcm-import-results').show();
                    } else {
                        showNotice('error', response.data.message);
                    }
                },
                error: function() {
                    showNotice('error', studiouWcpcm.i18n.importError);
                },
                complete: function() {
                    // Hide spinner
                    $submitBtn.prop('disabled', false);
                    $spinner.css('visibility', 'hidden');
                }
            });
        });
    }
    
    /**
     * Initialize export form
     */
    function initExportForm() {
        $('#studiou-wcpcm-export-form').on('submit', function(e) {
            e.preventDefault();
            
            // Show spinner
            var $submitBtn = $(this).find('#studiou-wcpcm-export-button');
            var $spinner = $(this).find('.spinner');
            
            $submitBtn.prop('disabled', true);
            $spinner.css('visibility', 'visible');
            
            // Clear previous notices
            $('.studiou-wcpcm-notice-area').empty();
            
            // Send AJAX request
            $.ajax({
                url: studiouWcpcm.ajaxUrl,
                type: 'POST',
                data: {
                    action: 'studiou_wcpcm_export',
                    nonce: studiouWcpcm.nonce
                },
                success: function(response) {
                    if (response.success) {
                        showNotice('success', studiouWcpcm.i18n.exportSuccess);
                        
                        // Show download link
                        $('#studiou-wcpcm-export-message').text(response.data.message);
                        $('#studiou-wcpcm-download-export').attr('href', response.data.download_url);
                        $('.studiou-wcpcm-export-results').show();
                    } else {
                        showNotice('error', response.data.message);
                    }
                },
                error: function() {
                    showNotice('error', studiouWcpcm.i18n.exportError);
                },
                complete: function() {
                    // Hide spinner
                    $submitBtn.prop('disabled', false);
                    $spinner.css('visibility', 'hidden');
                }
            });
        });
    }
    
    /**
     * Initialize move products form
     */
    function initMoveForm() {
        console.log('STUDIOU WC: Initializing move form handlers');
        
        // Add debug button click handler first
        $('#studiou-wcpcm-move-button').on('click', function(e) {
            console.log('STUDIOU WC: Move button clicked directly');
        });
        
        $('#studiou-wcpcm-move-form').on('submit', function(e) {
            e.preventDefault();
            
            // Debug: Log form submission
            console.log('STUDIOU WC: Move form submitted');
            
            // Validate that different categories are selected
            var sourceCategory = $('#source_category').val();
            var targetCategory = $('#target_category').val();
            
            console.log('STUDIOU WC: Source category:', sourceCategory, 'Target category:', targetCategory);
            
            if (!sourceCategory || !targetCategory) {
                console.log('STUDIOU WC: Missing category selection');
                showNotice('error', 'Please select both source and target categories');
                return;
            }
            
            if (sourceCategory === targetCategory) {
                console.log('STUDIOU WC: Same category selected');
                showNotice('error', studiouWcpcm.i18n.selectDifferentCategories);
                return;
            }
            
            // Show spinner
            var $submitBtn = $(this).find('#studiou-wcpcm-move-button');
            var $spinner = $(this).find('.spinner');
            
            $submitBtn.prop('disabled', true);
            $spinner.css('visibility', 'visible');
            
            // Clear previous notices
            $('.studiou-wcpcm-notice-area').empty();
            
            // Debug: Log AJAX request details
            console.log('STUDIOU WC: Sending AJAX request to:', studiouWcpcm.ajaxUrl);
            console.log('STUDIOU WC: Nonce:', studiouWcpcm.nonce);
            
            // Send AJAX request
            $.ajax({
                url: studiouWcpcm.ajaxUrl,
                type: 'POST',
                data: {
                    action: 'studiou_wcpcm_move_products',
                    source_category: sourceCategory,
                    target_category: targetCategory,
                    nonce: studiouWcpcm.nonce
                },
                success: function(response) {
                    console.log('STUDIOU WC: AJAX response:', response);
                    
                    if (response.success) {
                        showNotice('success', studiouWcpcm.i18n.moveSuccess);
                        
                        // Show results
                        $('#studiou-wcpcm-move-message').html('<p>' + response.data.message + '</p>');
                        $('.studiou-wcpcm-move-results').show();
                        
                        // Refresh the page to update category counts
                        setTimeout(function() {
                            location.reload();
                        }, 3000);
                    } else {
                        showNotice('error', response.data.message);
                    }
                },
                error: function(xhr, status, error) {
                    console.error('STUDIOU WC: AJAX error:', status, error);
                    console.error('STUDIOU WC: Response text:', xhr.responseText);
                    showNotice('error', studiouWcpcm.i18n.moveError + ': ' + error);
                },
                complete: function() {
                    // Hide spinner
                    $submitBtn.prop('disabled', false);
                    $spinner.css('visibility', 'hidden');
                }
            });
        });
    }
    
    /**
     * Initialize batch description form
     */
    function initBatchDescriptionForm() {
        console.log('STUDIOU WC: Initializing batch description form handlers');
        
        // Check all button handler
        $('#studiou-wcpcm-check-all').on('click', function(e) {
            e.preventDefault();
            console.log('STUDIOU WC: Check all button clicked');
            $('#categories_list input[type="checkbox"]').prop('checked', true);
        });
        
        // Uncheck all button handler
        $('#studiou-wcpcm-uncheck-all').on('click', function(e) {
            e.preventDefault();
            console.log('STUDIOU WC: Uncheck all button clicked');
            $('#categories_list input[type="checkbox"]').prop('checked', false);
        });
        
        // Form submit handler
        $('#studiou-wcpcm-batch-description-form').on('submit', function(e) {
            e.preventDefault();
            
            console.log('STUDIOU WC: Batch description form submitted');
            
            // Get selected categories
            var selectedCategories = [];
            $('#categories_list input[type="checkbox"]:checked').each(function() {
                selectedCategories.push($(this).val());
            });
            
            var description = $('#category_description').val();
            
            console.log('STUDIOU WC: Selected categories:', selectedCategories);
            console.log('STUDIOU WC: Description:', description);
            
            // Validate input
            if (selectedCategories.length === 0) {
                console.log('STUDIOU WC: No categories selected');
                showNotice('error', 'Please select at least one category');
                return;
            }
            
            // Show spinner
            var $submitBtn = $(this).find('#studiou-wcpcm-batch-description-button');
            var $spinner = $(this).find('.spinner');
            
            $submitBtn.prop('disabled', true);
            $spinner.css('visibility', 'visible');
            
            // Clear previous notices
            $('.studiou-wcpcm-notice-area').empty();
            
            // Debug: Log AJAX request details
            console.log('STUDIOU WC: Sending batch description AJAX request to:', studiouWcpcm.ajaxUrl);
            console.log('STUDIOU WC: Nonce:', studiouWcpcm.nonce);
            
            // Send AJAX request
            $.ajax({
                url: studiouWcpcm.ajaxUrl,
                type: 'POST',
                data: {
                    action: 'studiou_wcpcm_batch_description',
                    selected_categories: selectedCategories,
                    description: description,
                    nonce: studiouWcpcm.nonce
                },
                success: function(response) {
                    console.log('STUDIOU WC: Batch description AJAX response:', response);
                    
                    if (response.success) {
                        showNotice('success', studiouWcpcm.i18n.batchDescriptionSuccess || 'Batch description operation successful');
                        
                        // Show results
                        $('#studiou-wcpcm-batch-description-message').html('<p>' + response.data.message + '</p>');
                        $('.studiou-wcpcm-batch-description-results').show();
                    } else {
                        showNotice('error', response.data.message);
                    }
                },
                error: function(xhr, status, error) {
                    console.error('STUDIOU WC: Batch description AJAX error:', status, error);
                    console.error('STUDIOU WC: Response text:', xhr.responseText);
                    showNotice('error', (studiouWcpcm.i18n.batchDescriptionError || 'Batch description operation error') + ': ' + error);
                },
                complete: function() {
                    // Hide spinner
                    $submitBtn.prop('disabled', false);
                    $spinner.css('visibility', 'hidden');
                }
            });
        });
    }
    
    /**
     * Initialize sample CSV download
     */
    function initSampleDownload() {
        $('#studiou-wcpcm-download-sample').on('click', function(e) {
            e.preventDefault();
            
            // Sample CSV content
            var csvContent = 'name,url-name,parent-name,description,display-type,visibility,protected-passwords,operation\n' +
                '"Clothing","clothing","","Top quality clothing","default","public","","A"\n' +
                '"Men","men","Clothing","Men\'s clothing","products","public","","A"\n' +
                '"Women","women","Clothing","Women\'s clothing","products","protected","password123","A"\n' +
                '"Kids","kids","Clothing","Kids clothing","products","public","","U"\n' +
                '"Accessories","accessories","","All accessories","default","public","","D"';
            
            // Create download link
            var blob = new Blob([csvContent], { type: 'text/csv;charset=utf-8;' });
            var url = URL.createObjectURL(blob);
            var link = document.createElement('a');
            
            link.setAttribute('href', url);
            link.setAttribute('download', 'sample-product-categories.csv');
            link.style.visibility = 'hidden';
            
            document.body.appendChild(link);
            link.click();
            document.body.removeChild(link);
        });
    }
    
    /**
     * Initialize delete products form
     */
    function initDeleteProductsForm() {
        console.log('STUDIOU WC: Initializing delete products form handlers');
        console.log('STUDIOU WC: Form element:', $('#studiou-wcpcm-delete-products-form'));
        console.log('STUDIOU WC: Check all button:', $('#studiou-wcpcm-delete-check-all'));
        console.log('STUDIOU WC: Delete button:', $('#studiou-wcpcm-delete-products-button'));

        // Check all button handler
        $('#studiou-wcpcm-delete-check-all').on('click', function(e) {
            e.preventDefault();
            console.log('STUDIOU WC: Delete check all button clicked');
            $('#delete_categories_list input[type="checkbox"]').prop('checked', true);
        });

        // Uncheck all button handler
        $('#studiou-wcpcm-delete-uncheck-all').on('click', function(e) {
            e.preventDefault();
            console.log('STUDIOU WC: Delete uncheck all button clicked');
            $('#delete_categories_list input[type="checkbox"]').prop('checked', false);
        });

        // Form submit handler
        $('#studiou-wcpcm-delete-products-form').on('submit', function(e) {
            e.preventDefault();

            console.log('STUDIOU WC: Delete products form submitted');

            // Get selected categories
            var selectedCategories = [];
            $('#delete_categories_list input[type="checkbox"]:checked').each(function() {
                selectedCategories.push($(this).val());
            });

            console.log('STUDIOU WC: Selected categories:', selectedCategories);

            // Validate input
            if (selectedCategories.length === 0) {
                console.log('STUDIOU WC: No categories selected');
                showNotice('error', studiouWcpcm.i18n.selectAtLeastOneCategory || 'Please select at least one category');
                return;
            }

            // Confirm deletion
            if (!confirm(studiouWcpcm.i18n.confirmDelete || 'Are you sure you want to permanently delete ALL products in the selected categories? This action cannot be undone!')) {
                console.log('STUDIOU WC: User cancelled deletion');
                return;
            }

            // Show spinner
            var $submitBtn = $(this).find('#studiou-wcpcm-delete-products-button');
            var $spinner = $(this).find('.spinner');

            $submitBtn.prop('disabled', true);
            $spinner.css('visibility', 'visible');

            // Clear previous notices
            $('.studiou-wcpcm-notice-area').empty();

            // Hide results, show progress
            $('.studiou-wcpcm-delete-results').hide();
            $('.studiou-wcpcm-delete-progress').show();
            $('#studiou-wcpcm-delete-progress-text').text('Initializing...');
            updateProgressBar(0);

            // Debug: Log AJAX request details
            console.log('STUDIOU WC: Sending delete products AJAX request to:', studiouWcpcm.ajaxUrl);
            console.log('STUDIOU WC: Nonce:', studiouWcpcm.nonce);

            // Send AJAX request to get product IDs
            $.ajax({
                url: studiouWcpcm.ajaxUrl,
                type: 'POST',
                data: {
                    action: 'studiou_wcpcm_delete_products',
                    delete_categories: selectedCategories,
                    nonce: studiouWcpcm.nonce
                },
                success: function(response) {
                    console.log('STUDIOU WC: Delete products AJAX response:', response);

                    if (response.success) {
                        var productIds = response.data.product_ids;
                        var totalCount = response.data.total_count;

                        console.log('STUDIOU WC: Total products to delete:', totalCount);

                        if (totalCount === 0) {
                            showNotice('success', studiouWcpcm.i18n.noProductsFound || 'No products found in selected categories');
                            $('.studiou-wcpcm-delete-progress').hide();
                            $submitBtn.prop('disabled', false);
                            $spinner.css('visibility', 'hidden');
                            return;
                        }

                        // Process products in batches
                        processDeletionBatches(productIds, totalCount, $submitBtn, $spinner);

                    } else {
                        showNotice('error', response.data.message);
                        $('.studiou-wcpcm-delete-progress').hide();
                        $submitBtn.prop('disabled', false);
                        $spinner.css('visibility', 'hidden');
                    }
                },
                error: function(xhr, status, error) {
                    console.error('STUDIOU WC: Delete products AJAX error:', status, error);
                    console.error('STUDIOU WC: Response text:', xhr.responseText);
                    showNotice('error', (studiouWcpcm.i18n.deleteError || 'Delete products operation error') + ': ' + error);
                    $('.studiou-wcpcm-delete-progress').hide();
                    $submitBtn.prop('disabled', false);
                    $spinner.css('visibility', 'hidden');
                }
            });
        });
    }

    /**
     * Process deletion in batches
     */
    function processDeletionBatches(productIds, totalCount, $submitBtn, $spinner) {
        var batchSize = 10; // Process 10 products at a time
        var batches = [];
        var totalDeleted = 0;
        var totalFailed = 0;
        var failedProducts = [];

        // Split products into batches
        for (var i = 0; i < productIds.length; i += batchSize) {
            batches.push(productIds.slice(i, i + batchSize));
        }

        console.log('STUDIOU WC: Processing ' + batches.length + ' batches of products');

        var currentBatch = 0;

        function processBatch() {
            if (currentBatch >= batches.length) {
                // All batches completed
                console.log('STUDIOU WC: All batches completed');
                onDeletionComplete(totalDeleted, totalFailed, failedProducts, $submitBtn, $spinner);
                return;
            }

            var batch = batches[currentBatch];
            var progress = Math.round((currentBatch / batches.length) * 100);

            $('#studiou-wcpcm-delete-progress-text').text(
                'Deleting products... ' + (currentBatch * batchSize) + ' of ' + totalCount + ' processed'
            );
            updateProgressBar(progress);

            // Send batch delete request
            $.ajax({
                url: studiouWcpcm.ajaxUrl,
                type: 'POST',
                data: {
                    action: 'studiou_wcpcm_delete_products_batch',
                    product_ids: batch,
                    nonce: studiouWcpcm.nonce
                },
                success: function(response) {
                    if (response.success) {
                        totalDeleted += response.data.deleted_count;
                        totalFailed += response.data.failed_count;
                        failedProducts = failedProducts.concat(response.data.failed_products);

                        console.log('STUDIOU WC: Batch ' + currentBatch + ' completed - Deleted: ' +
                            response.data.deleted_count + ', Failed: ' + response.data.failed_count);

                        // Process next batch
                        currentBatch++;
                        processBatch();
                    } else {
                        showNotice('error', response.data.message);
                        $('.studiou-wcpcm-delete-progress').hide();
                        $submitBtn.prop('disabled', false);
                        $spinner.css('visibility', 'hidden');
                    }
                },
                error: function(xhr, status, error) {
                    console.error('STUDIOU WC: Batch delete AJAX error:', status, error);
                    showNotice('error', 'Error deleting batch: ' + error);
                    $('.studiou-wcpcm-delete-progress').hide();
                    $submitBtn.prop('disabled', false);
                    $spinner.css('visibility', 'hidden');
                }
            });
        }

        // Start processing batches
        processBatch();
    }

    /**
     * Handle deletion completion
     */
    function onDeletionComplete(totalDeleted, totalFailed, failedProducts, $submitBtn, $spinner) {
        // Update progress bar to 100%
        updateProgressBar(100);
        $('#studiou-wcpcm-delete-progress-text').text('Deletion complete!');

        // Show results
        var message = '<p><strong>Deletion Summary:</strong></p>';
        message += '<ul>';
        message += '<li>Total products deleted: ' + totalDeleted + '</li>';
        if (totalFailed > 0) {
            message += '<li>Failed to delete: ' + totalFailed + '</li>';
            if (failedProducts.length > 0) {
                message += '<li>Failed product IDs: ' + failedProducts.join(', ') + '</li>';
            }
        }
        message += '</ul>';

        $('#studiou-wcpcm-delete-message').html(message);
        $('.studiou-wcpcm-delete-results').show();

        // Hide progress after a delay
        setTimeout(function() {
            $('.studiou-wcpcm-delete-progress').fadeOut();
        }, 2000);

        if (totalDeleted > 0) {
            showNotice('success', (studiouWcpcm.i18n.deleteSuccess || 'Successfully deleted') + ' ' + totalDeleted + ' products');

            // Reload page after 3 seconds
            setTimeout(function() {
                location.reload();
            }, 3000);
        } else {
            showNotice('error', studiouWcpcm.i18n.deleteError || 'Failed to delete any products');
        }

        $submitBtn.prop('disabled', false);
        $spinner.css('visibility', 'hidden');
    }

    /**
     * Update progress bar
     */
    function updateProgressBar(percentage) {
        $('#studiou-wcpcm-delete-progress-bar').css('width', percentage + '%');
        $('#studiou-wcpcm-delete-progress-bar').attr('data-progress', percentage + '%');
    }

    /**
     * Initialize clear media categories form
     */
    function initClearMediaForm() {
        console.log('STUDIOU WC: Initializing clear media form handlers');

        // Check all button handler
        $('#studiou-wcpcm-clear-media-check-all').on('click', function(e) {
            e.preventDefault();
            console.log('STUDIOU WC: Clear media check all button clicked');
            $('#clear_media_categories_list input[type="checkbox"]').prop('checked', true);
        });

        // Uncheck all button handler
        $('#studiou-wcpcm-clear-media-uncheck-all').on('click', function(e) {
            e.preventDefault();
            console.log('STUDIOU WC: Clear media uncheck all button clicked');
            $('#clear_media_categories_list input[type="checkbox"]').prop('checked', false);
        });

        // Form submit handler
        $('#studiou-wcpcm-clear-media-form').on('submit', function(e) {
            e.preventDefault();

            console.log('STUDIOU WC: Clear media form submitted');

            // Get selected categories
            var selectedCategories = [];
            $('#clear_media_categories_list input[type="checkbox"]:checked').each(function() {
                selectedCategories.push($(this).val());
            });

            console.log('STUDIOU WC: Selected media categories:', selectedCategories);

            // Validate input
            if (selectedCategories.length === 0) {
                console.log('STUDIOU WC: No media categories selected');
                showNotice('error', studiouWcpcm.i18n.selectAtLeastOneCategory || 'Please select at least one category');
                return;
            }

            // Confirm deletion
            if (!confirm(studiouWcpcm.i18n.confirmClearMedia || 'Are you sure you want to permanently delete ALL media files in the selected media categories? This action cannot be undone!')) {
                console.log('STUDIOU WC: User cancelled clear media');
                return;
            }

            // Show spinner
            var $submitBtn = $(this).find('#studiou-wcpcm-clear-media-button');
            var $spinner = $(this).find('.spinner');

            $submitBtn.prop('disabled', true);
            $spinner.css('visibility', 'visible');

            // Clear previous notices
            $('.studiou-wcpcm-notice-area').empty();

            // Hide results, show progress
            $('.studiou-wcpcm-clear-media-results').hide();
            $('.studiou-wcpcm-clear-media-progress').show();
            $('#studiou-wcpcm-clear-media-progress-text').text('Initializing...');
            updateClearMediaProgressBar(0);

            // Send AJAX request to get media IDs
            $.ajax({
                url: studiouWcpcm.ajaxUrl,
                type: 'POST',
                data: {
                    action: 'studiou_wcpcm_clear_media',
                    media_categories: selectedCategories,
                    nonce: studiouWcpcm.nonce
                },
                success: function(response) {
                    console.log('STUDIOU WC: Clear media AJAX response:', response);

                    if (response.success) {
                        var mediaIds = response.data.media_ids;
                        var totalCount = response.data.total_count;

                        console.log('STUDIOU WC: Total media files to delete:', totalCount);

                        if (totalCount === 0) {
                            showNotice('success', studiouWcpcm.i18n.noMediaFound || 'No media files found in selected categories');
                            $('.studiou-wcpcm-clear-media-progress').hide();
                            $submitBtn.prop('disabled', false);
                            $spinner.css('visibility', 'hidden');
                            return;
                        }

                        // Process media in batches
                        processMediaDeletionBatches(mediaIds, totalCount, $submitBtn, $spinner);

                    } else {
                        showNotice('error', response.data.message);
                        $('.studiou-wcpcm-clear-media-progress').hide();
                        $submitBtn.prop('disabled', false);
                        $spinner.css('visibility', 'hidden');
                    }
                },
                error: function(xhr, status, error) {
                    console.error('STUDIOU WC: Clear media AJAX error:', status, error);
                    console.error('STUDIOU WC: Response text:', xhr.responseText);
                    showNotice('error', (studiouWcpcm.i18n.clearMediaError || 'Clear media operation error') + ': ' + error);
                    $('.studiou-wcpcm-clear-media-progress').hide();
                    $submitBtn.prop('disabled', false);
                    $spinner.css('visibility', 'hidden');
                }
            });
        });
    }

    /**
     * Process media deletion in batches
     */
    function processMediaDeletionBatches(mediaIds, totalCount, $submitBtn, $spinner) {
        var batchSize = 10;
        var batches = [];
        var totalDeleted = 0;
        var totalFailed = 0;
        var failedMedia = [];

        // Split media into batches
        for (var i = 0; i < mediaIds.length; i += batchSize) {
            batches.push(mediaIds.slice(i, i + batchSize));
        }

        console.log('STUDIOU WC: Processing ' + batches.length + ' batches of media files');

        var currentBatch = 0;

        function processBatch() {
            if (currentBatch >= batches.length) {
                console.log('STUDIOU WC: All media batches completed');
                onMediaDeletionComplete(totalDeleted, totalFailed, failedMedia, $submitBtn, $spinner);
                return;
            }

            var batch = batches[currentBatch];
            var progress = Math.round((currentBatch / batches.length) * 100);

            $('#studiou-wcpcm-clear-media-progress-text').text(
                'Deleting media files... ' + (currentBatch * batchSize) + ' of ' + totalCount + ' processed'
            );
            updateClearMediaProgressBar(progress);

            $.ajax({
                url: studiouWcpcm.ajaxUrl,
                type: 'POST',
                data: {
                    action: 'studiou_wcpcm_clear_media_batch',
                    media_ids: batch,
                    nonce: studiouWcpcm.nonce
                },
                success: function(response) {
                    if (response.success) {
                        totalDeleted += response.data.deleted_count;
                        totalFailed += response.data.failed_count;
                        failedMedia = failedMedia.concat(response.data.failed_media);

                        console.log('STUDIOU WC: Media batch ' + currentBatch + ' completed - Deleted: ' +
                            response.data.deleted_count + ', Failed: ' + response.data.failed_count);

                        currentBatch++;
                        processBatch();
                    } else {
                        showNotice('error', response.data.message);
                        $('.studiou-wcpcm-clear-media-progress').hide();
                        $submitBtn.prop('disabled', false);
                        $spinner.css('visibility', 'hidden');
                    }
                },
                error: function(xhr, status, error) {
                    console.error('STUDIOU WC: Media batch delete AJAX error:', status, error);
                    showNotice('error', 'Error deleting media batch: ' + error);
                    $('.studiou-wcpcm-clear-media-progress').hide();
                    $submitBtn.prop('disabled', false);
                    $spinner.css('visibility', 'hidden');
                }
            });
        }

        processBatch();
    }

    /**
     * Handle media deletion completion
     */
    function onMediaDeletionComplete(totalDeleted, totalFailed, failedMedia, $submitBtn, $spinner) {
        updateClearMediaProgressBar(100);
        $('#studiou-wcpcm-clear-media-progress-text').text('Deletion complete!');

        var message = '<p><strong>Deletion Summary:</strong></p>';
        message += '<ul>';
        message += '<li>Total media files deleted: ' + totalDeleted + '</li>';
        if (totalFailed > 0) {
            message += '<li>Failed to delete: ' + totalFailed + '</li>';
            if (failedMedia.length > 0) {
                message += '<li>Failed media IDs: ' + failedMedia.join(', ') + '</li>';
            }
        }
        message += '</ul>';

        $('#studiou-wcpcm-clear-media-message').html(message);
        $('.studiou-wcpcm-clear-media-results').show();

        setTimeout(function() {
            $('.studiou-wcpcm-clear-media-progress').fadeOut();
        }, 2000);

        if (totalDeleted > 0) {
            showNotice('success', (studiouWcpcm.i18n.clearMediaSuccess || 'Successfully deleted') + ' ' + totalDeleted + ' media files');

            setTimeout(function() {
                location.reload();
            }, 3000);
        } else {
            showNotice('error', studiouWcpcm.i18n.clearMediaError || 'Failed to delete any media files');
        }

        $submitBtn.prop('disabled', false);
        $spinner.css('visibility', 'hidden');
    }

    /**
     * Update clear media progress bar
     */
    function updateClearMediaProgressBar(percentage) {
        $('#studiou-wcpcm-clear-media-progress-bar').css('width', percentage + '%');
        $('#studiou-wcpcm-clear-media-progress-bar').attr('data-progress', percentage + '%');
    }

    /**
     * Initialize remove unassigned media form
     */
    function initRemoveUnassignedMediaForm() {
        console.log('STUDIOU WC: Initializing remove unassigned media form handlers');

        $('#studiou-wcpcm-remove-unassigned-media-form').on('submit', function(e) {
            e.preventDefault();

            console.log('STUDIOU WC: Remove unassigned media form submitted');

            if (!confirm(studiouWcpcm.i18n.confirmRemoveUnassigned || 'Are you sure you want to permanently delete ALL unused uncategorized media files? This action cannot be undone!')) {
                return;
            }

            var $submitBtn = $(this).find('#studiou-wcpcm-remove-unassigned-media-button');
            var $spinner = $(this).find('.spinner');

            $submitBtn.prop('disabled', true);
            $spinner.css('visibility', 'visible');

            $('.studiou-wcpcm-notice-area').empty();
            $('.studiou-wcpcm-remove-unassigned-media-results').hide();
            $('.studiou-wcpcm-remove-unassigned-media-progress').show();
            $('#studiou-wcpcm-remove-unassigned-media-progress-text').text('Initializing...');
            updateRemoveUnassignedProgressBar(0);

            $.ajax({
                url: studiouWcpcm.ajaxUrl,
                type: 'POST',
                data: {
                    action: 'studiou_wcpcm_remove_unassigned_media',
                    nonce: studiouWcpcm.nonce
                },
                success: function(response) {
                    console.log('STUDIOU WC: Remove unassigned media response:', response);

                    if (response.success) {
                        var mediaIds = response.data.media_ids;
                        var totalCount = response.data.total_count;

                        if (totalCount === 0) {
                            showNotice('success', studiouWcpcm.i18n.noUnassignedMedia || 'No unused uncategorized media files found');
                            $('.studiou-wcpcm-remove-unassigned-media-progress').hide();
                            $submitBtn.prop('disabled', false);
                            $spinner.css('visibility', 'hidden');
                            return;
                        }

                        processUnassignedMediaBatches(mediaIds, totalCount, $submitBtn, $spinner);
                    } else {
                        showNotice('error', response.data.message);
                        $('.studiou-wcpcm-remove-unassigned-media-progress').hide();
                        $submitBtn.prop('disabled', false);
                        $spinner.css('visibility', 'hidden');
                    }
                },
                error: function(xhr, status, error) {
                    console.error('STUDIOU WC: Remove unassigned media error:', status, error);
                    showNotice('error', (studiouWcpcm.i18n.removeUnassignedError || 'Error') + ': ' + error);
                    $('.studiou-wcpcm-remove-unassigned-media-progress').hide();
                    $submitBtn.prop('disabled', false);
                    $spinner.css('visibility', 'hidden');
                }
            });
        });
    }

    /**
     * Process unassigned media deletion in batches
     */
    function processUnassignedMediaBatches(mediaIds, totalCount, $submitBtn, $spinner) {
        var batchSize = 10;
        var batches = [];
        var totalDeleted = 0;
        var totalFailed = 0;
        var failedMedia = [];

        for (var i = 0; i < mediaIds.length; i += batchSize) {
            batches.push(mediaIds.slice(i, i + batchSize));
        }

        var currentBatch = 0;

        function processBatch() {
            if (currentBatch >= batches.length) {
                onUnassignedMediaComplete(totalDeleted, totalFailed, failedMedia, $submitBtn, $spinner);
                return;
            }

            var batch = batches[currentBatch];
            var progress = Math.round((currentBatch / batches.length) * 100);

            $('#studiou-wcpcm-remove-unassigned-media-progress-text').text(
                'Deleting media files... ' + (currentBatch * batchSize) + ' of ' + totalCount + ' processed'
            );
            updateRemoveUnassignedProgressBar(progress);

            $.ajax({
                url: studiouWcpcm.ajaxUrl,
                type: 'POST',
                data: {
                    action: 'studiou_wcpcm_remove_unassigned_media_batch',
                    media_ids: batch,
                    nonce: studiouWcpcm.nonce
                },
                success: function(response) {
                    if (response.success) {
                        totalDeleted += response.data.deleted_count;
                        totalFailed += response.data.failed_count;
                        failedMedia = failedMedia.concat(response.data.failed_media);
                        currentBatch++;
                        processBatch();
                    } else {
                        showNotice('error', response.data.message);
                        $('.studiou-wcpcm-remove-unassigned-media-progress').hide();
                        $submitBtn.prop('disabled', false);
                        $spinner.css('visibility', 'hidden');
                    }
                },
                error: function(xhr, status, error) {
                    console.error('STUDIOU WC: Unassigned media batch error:', status, error);
                    showNotice('error', 'Error deleting batch: ' + error);
                    $('.studiou-wcpcm-remove-unassigned-media-progress').hide();
                    $submitBtn.prop('disabled', false);
                    $spinner.css('visibility', 'hidden');
                }
            });
        }

        processBatch();
    }

    /**
     * Handle unassigned media deletion completion
     */
    function onUnassignedMediaComplete(totalDeleted, totalFailed, failedMedia, $submitBtn, $spinner) {
        updateRemoveUnassignedProgressBar(100);
        $('#studiou-wcpcm-remove-unassigned-media-progress-text').text('Deletion complete!');

        var message = '<p><strong>Deletion Summary:</strong></p>';
        message += '<ul>';
        message += '<li>Total media files deleted: ' + totalDeleted + '</li>';
        if (totalFailed > 0) {
            message += '<li>Failed to delete: ' + totalFailed + '</li>';
            if (failedMedia.length > 0) {
                message += '<li>Failed media IDs: ' + failedMedia.join(', ') + '</li>';
            }
        }
        message += '</ul>';

        $('#studiou-wcpcm-remove-unassigned-media-message').html(message);
        $('.studiou-wcpcm-remove-unassigned-media-results').show();

        setTimeout(function() {
            $('.studiou-wcpcm-remove-unassigned-media-progress').fadeOut();
        }, 2000);

        if (totalDeleted > 0) {
            showNotice('success', (studiouWcpcm.i18n.removeUnassignedSuccess || 'Successfully deleted') + ' ' + totalDeleted + ' media files');
            setTimeout(function() {
                location.reload();
            }, 3000);
        } else {
            showNotice('error', studiouWcpcm.i18n.removeUnassignedError || 'Failed to delete any media files');
        }

        $submitBtn.prop('disabled', false);
        $spinner.css('visibility', 'hidden');
    }

    /**
     * Update remove unassigned media progress bar
     */
    function updateRemoveUnassignedProgressBar(percentage) {
        $('#studiou-wcpcm-remove-unassigned-media-progress-bar').css('width', percentage + '%');
        $('#studiou-wcpcm-remove-unassigned-media-progress-bar').attr('data-progress', percentage + '%');
    }

    /**
     * Show notice message
     *
     * @param {string} type Notice type (success, error)
     * @param {string} message Notice message
     */
    function showNotice(type, message) {
        var $notice = $('<div class="studiou-wcpcm-notice studiou-wcpcm-notice-' + type + '"></div>').text(message);
        $('.studiou-wcpcm-notice-area').append($notice);

        // Scroll to notice
        $('html, body').animate({
            scrollTop: $('.studiou-wcpcm-notice-area').offset().top - 50
        }, 500);
    }

    /**
     * Initialize product import form
     */
    function initProductImportForm() {
        console.log('STUDIOU WC: Initializing product import form handlers');

        // Global variables for batch processing
        var importTransientKey = null;
        var importTotal = 0;
        var importProcessed = 0;
        var importSuccess = 0;
        var importFailed = 0;
        var importSkipped = 0;
        var importMessages = [];
        var importFailedCsv = '';

        $('#studiou-wcpcm-product-import-form').on('submit', function(e) {
            e.preventDefault();

            console.log('STUDIOU WC: Product import form submitted');

            // Validate file is selected
            var fileInput = $('#import_file')[0];
            if (!fileInput.files || !fileInput.files[0]) {
                showNotice('error', 'Please select a CSV file to import');
                return;
            }

            // Show spinner and progress
            var $submitBtn = $(this).find('#studiou-wcpcm-product-import-button');
            var $spinner = $(this).find('.spinner');

            $submitBtn.prop('disabled', true);
            $spinner.css('visibility', 'visible');

            // Clear previous results
            $('.studiou-wcpcm-notice-area').empty();
            $('.studiou-wcpcm-product-import-results').hide();
            $('.studiou-wcpcm-product-import-failed').hide();

            // Reset counters
            importTransientKey = null;
            importTotal = 0;
            importProcessed = 0;
            importSuccess = 0;
            importFailed = 0;
            importSkipped = 0;
            importMessages = [];
            importFailedCsv = '';

            // Show progress bar
            $('.studiou-wcpcm-product-import-progress').show();
            $('#studiou-wcpcm-product-import-progress-text').text('Parsing CSV file...');
            updateProductImportProgressBar(0);

            // Step 1: Parse CSV file
            var formData = new FormData(this);
            formData.append('action', 'studiou_wcpcm_product_import_parse');
            formData.append('nonce', studiouWcpcm.nonce);

            $.ajax({
                url: studiouWcpcm.ajaxUrl,
                type: 'POST',
                data: formData,
                processData: false,
                contentType: false,
                success: function(response) {
                    console.log('STUDIOU WC: Product import parse response:', response);

                    if (response.success) {
                        importTransientKey = response.data.transient_key;
                        importTotal = response.data.total;

                        // Start batch processing
                        processBatch(0, $submitBtn, $spinner);
                    } else {
                        showNotice('error', response.data.message || 'Parse failed');
                        $('.studiou-wcpcm-product-import-progress').hide();
                        $submitBtn.prop('disabled', false);
                        $spinner.css('visibility', 'hidden');
                    }
                },
                error: function(xhr, status, error) {
                    console.error('STUDIOU WC: Product import parse error:', status, error);
                    console.error('STUDIOU WC: Response text:', xhr.responseText);
                    showNotice('error', 'Product import error: ' + error);
                    $('.studiou-wcpcm-product-import-progress').hide();
                    $submitBtn.prop('disabled', false);
                    $spinner.css('visibility', 'hidden');
                }
            });
        });

        // Process batch of products
        function processBatch(offset, $submitBtn, $spinner) {
            console.log('STUDIOU WC: Processing batch at offset', offset);

            $.ajax({
                url: studiouWcpcm.ajaxUrl,
                type: 'POST',
                data: {
                    action: 'studiou_wcpcm_product_import_batch',
                    nonce: studiouWcpcm.nonce,
                    transient_key: importTransientKey,
                    offset: offset
                },
                success: function(response) {
                    console.log('STUDIOU WC: Batch response:', response);

                    if (response.success) {
                        // Accumulate results
                        importSuccess += response.data.success;
                        importFailed += response.data.failed;
                        importSkipped += response.data.skipped;
                        importProcessed = response.data.processed;
                        importTotal = response.data.total;
                        importMessages = importMessages.concat(response.data.messages);

                        if (response.data.failed_csv) {
                            importFailedCsv = response.data.failed_csv;
                        }

                        // Update progress
                        var percent = (importProcessed / importTotal) * 100;
                        updateProductImportProgressBar(percent);
                        $('#studiou-wcpcm-product-import-progress-text').text(
                            'Processing: ' + importProcessed + ' / ' + importTotal + ' products'
                        );

                        // Check if complete
                        if (importProcessed >= importTotal) {
                            // Import complete
                            $('#studiou-wcpcm-product-import-progress-text').text('Complete!');
                            showNotice('success', 'Product import completed!');

                            // Show results
                            var message = '<p><strong>Import Summary:</strong></p>';
                            message += '<ul>';
                            message += '<li>Successful: ' + importSuccess + '</li>';
                            message += '<li>Failed: ' + importFailed + '</li>';
                            message += '<li>Skipped: ' + importSkipped + '</li>';
                            message += '</ul>';

                            $('#studiou-wcpcm-product-import-message').html(message);

                            // Show detailed messages
                            if (importMessages.length > 0) {
                                var details = '<pre>' + importMessages.join('\n') + '</pre>';
                                $('#studiou-wcpcm-product-import-details-content').html(details);
                            }

                            $('.studiou-wcpcm-product-import-results').show();

                            // Show save failed button if there are failed items
                            if (importFailed > 0 && importFailedCsv) {
                                window.studiouWcpcmFailedCsv = importFailedCsv;
                                $('.studiou-wcpcm-product-import-failed').show();
                            }

                            // Hide progress after delay
                            setTimeout(function() {
                                $('.studiou-wcpcm-product-import-progress').fadeOut();
                            }, 2000);

                            $submitBtn.prop('disabled', false);
                            $spinner.css('visibility', 'hidden');
                        } else {
                            // Process next batch
                            processBatch(importProcessed, $submitBtn, $spinner);
                        }
                    } else {
                        showNotice('error', response.data.message || 'Batch processing failed');
                        $('.studiou-wcpcm-product-import-progress').hide();
                        $submitBtn.prop('disabled', false);
                        $spinner.css('visibility', 'hidden');
                    }
                },
                error: function(xhr, status, error) {
                    console.error('STUDIOU WC: Batch processing error:', status, error);
                    showNotice('error', 'Batch processing error: ' + error);
                    $('.studiou-wcpcm-product-import-progress').hide();
                    $submitBtn.prop('disabled', false);
                    $spinner.css('visibility', 'hidden');
                }
            });
        }

        // Save failed products button handler
        $('#studiou-wcpcm-save-failed-products').on('click', function(e) {
            e.preventDefault();

            if (window.studiouWcpcmFailedCsv) {
                var blob = new Blob([window.studiouWcpcmFailedCsv], { type: 'text/csv;charset=utf-8;' });
                var url = URL.createObjectURL(blob);
                var link = document.createElement('a');

                link.setAttribute('href', url);
                link.setAttribute('download', 'failed-products-' + Date.now() + '.csv');
                link.style.visibility = 'hidden';

                document.body.appendChild(link);
                link.click();
                document.body.removeChild(link);
            }
        });
    }

    /**
     * Initialize product export form
     */
    function initProductExportForm() {
        console.log('STUDIOU WC: Initializing product export form handlers');

        // Select all button handler
        $('#studiou-wcpcm-export-select-all').on('click', function(e) {
            e.preventDefault();
            console.log('STUDIOU WC: Export select all button clicked');
            $('#export_categories_list input[type="checkbox"]').prop('checked', true);
        });

        // Deselect all button handler
        $('#studiou-wcpcm-export-deselect-all').on('click', function(e) {
            e.preventDefault();
            console.log('STUDIOU WC: Export deselect all button clicked');
            $('#export_categories_list input[type="checkbox"]').prop('checked', false);
        });

        // Form submit handler
        $('#studiou-wcpcm-product-export-form').on('submit', function(e) {
            e.preventDefault();

            console.log('STUDIOU WC: Product export form submitted');

            // Get selected categories
            var selectedCategories = [];
            $('#export_categories_list input[type="checkbox"]:checked').each(function() {
                selectedCategories.push($(this).val());
            });

            console.log('STUDIOU WC: Selected categories:', selectedCategories);

            // Validate input
            if (selectedCategories.length === 0) {
                console.log('STUDIOU WC: No categories selected');
                showNotice('error', 'Please select at least one category');
                return;
            }

            // Show spinner
            var $submitBtn = $(this).find('#studiou-wcpcm-product-export-button');
            var $spinner = $(this).find('.spinner');

            $submitBtn.prop('disabled', true);
            $spinner.css('visibility', 'visible');

            // Clear previous notices
            $('.studiou-wcpcm-notice-area').empty();
            $('.studiou-wcpcm-product-export-results').hide();

            // Debug: Log AJAX request details
            console.log('STUDIOU WC: Sending product export AJAX request to:', studiouWcpcm.ajaxUrl);
            console.log('STUDIOU WC: Nonce:', studiouWcpcm.nonce);

            // Send AJAX request
            $.ajax({
                url: studiouWcpcm.ajaxUrl,
                type: 'POST',
                data: {
                    action: 'studiou_wcpcm_product_export',
                    export_categories: selectedCategories,
                    nonce: studiouWcpcm.nonce
                },
                success: function(response) {
                    console.log('STUDIOU WC: Product export AJAX response:', response);

                    if (response.success) {
                        showNotice('success', 'Export successful!');

                        // Show results
                        $('#studiou-wcpcm-product-export-message').html('<p>' + response.data.message + '</p>');
                        $('#studiou-wcpcm-download-product-export').attr('href', response.data.download_url);
                        $('.studiou-wcpcm-product-export-results').show();
                    } else {
                        showNotice('error', response.data.message || 'Export failed');
                    }
                },
                error: function(xhr, status, error) {
                    console.error('STUDIOU WC: Product export AJAX error:', status, error);
                    console.error('STUDIOU WC: Response text:', xhr.responseText);
                    showNotice('error', 'Product export error: ' + error);
                },
                complete: function() {
                    // Hide spinner
                    $submitBtn.prop('disabled', false);
                    $spinner.css('visibility', 'hidden');
                }
            });
        });
    }

    /**
     * Update product import progress bar
     */
    function updateProductImportProgressBar(percentage) {
        $('#studiou-wcpcm-product-import-progress-bar').css('width', percentage + '%');
        $('#studiou-wcpcm-product-import-progress-bar').attr('data-progress', Math.round(percentage) + '%');
    }

    // Additional debug: Check page state after DOM load
    $(window).on('load', function() {
        console.log('STUDIOU WC: Window loaded');
        console.log('STUDIOU WC: Manipulation tabs exist:', $('.studiou-wcpcm-tabs').length > 0);
        console.log('STUDIOU WC: Product import form exists:', $('#studiou-wcpcm-product-import-form').length > 0);
        console.log('STUDIOU WC: Product export form exists:', $('#studiou-wcpcm-product-export-form').length > 0);
    });

    /**
     * Initialize Update Product Variant Prices form (UPVP) — v1.5.3
     */
    function initUpdateVariantPricesForm() {
        var $form          = $('#studiou-wcpcm-upvp-form');
        var $catList       = $('#upvp_categories_list');
        var $attrSelect    = $('#upvp_attribute');
        var $valueSelect   = $('#upvp_attribute_value');
        var $newPrice      = $('#upvp_new_price');
        var $countLabel    = $('#studiou-wcpcm-upvp-affected-count');
        var $dryRunBtn     = $('#studiou-wcpcm-upvp-dry-run-button');
        var $applyBtn      = $('#studiou-wcpcm-upvp-apply-button');
        var $spinner       = $form.find('.spinner');
        var $resultsBox    = $('.studiou-wcpcm-upvp-results');
        var $resultsMsg    = $('#studiou-wcpcm-upvp-message');

        var i18n = (studiouWcpcm && studiouWcpcm.i18n) ? studiouWcpcm.i18n : {};
        var countDebounceHandle = null;
        var countInFlight = false;

        function getSelectedCategoryIds() {
            var ids = [];
            $catList.find('input[type="checkbox"]:checked').each(function() {
                ids.push($(this).val());
            });
            return ids;
        }

        function setApplyEnabled(count) {
            var enabled = (count > 0) && !countInFlight;
            $dryRunBtn.prop('disabled', !enabled);
            $applyBtn.prop('disabled', !enabled);
        }

        function loadAttributes() {
            $attrSelect.prop('disabled', true).html(
                '<option value="">' + (i18n.upvpLoadingAttributes || 'Loading attributes...') + '</option>'
            );

            $.ajax({
                url: studiouWcpcm.ajaxUrl,
                type: 'POST',
                data: {
                    action: 'studiou_wcpcm_upvp_get_attributes',
                    nonce: studiouWcpcm.nonce
                },
                success: function(response) {
                    $attrSelect.empty();
                    $attrSelect.append('<option value="">' + (i18n.upvpSelectAttribute || '-- Select attribute --') + '</option>');
                    if (response.success && response.data && response.data.attributes) {
                        $.each(response.data.attributes, function(_, a) {
                            $attrSelect.append(
                                $('<option/>')
                                    .val(a.key)
                                    .attr('data-istax', a.is_taxonomy ? '1' : '0')
                                    .text(a.label)
                            );
                        });
                    }
                    $attrSelect.prop('disabled', false);
                },
                error: function(xhr, status, error) {
                    console.error('STUDIOU WC UPVP: get_attributes failed', status, error);
                    $attrSelect.prop('disabled', false);
                }
            });
        }

        function loadValues() {
            var key = $attrSelect.val();
            $valueSelect.prop('disabled', true).empty();
            $valueSelect.append('<option value="">' + (i18n.upvpLoadingValues || 'Loading values...') + '</option>');

            if (!key) {
                $valueSelect.empty();
                $valueSelect.append('<option value="">' + (i18n.upvpSelectValue || '-- Select value --') + '</option>');
                $valueSelect.prop('disabled', true);
                refreshCount();
                return;
            }

            $.ajax({
                url: studiouWcpcm.ajaxUrl,
                type: 'POST',
                data: {
                    action: 'studiou_wcpcm_upvp_get_attribute_values',
                    nonce: studiouWcpcm.nonce,
                    attribute_key: key,
                    category_ids: getSelectedCategoryIds()
                },
                success: function(response) {
                    $valueSelect.empty();
                    $valueSelect.append('<option value="">' + (i18n.upvpSelectValue || '-- Select value --') + '</option>');
                    if (response.success && response.data && response.data.values) {
                        $.each(response.data.values, function(_, v) {
                            $valueSelect.append($('<option/>').val(v.value).text(v.label));
                        });
                    }
                    $valueSelect.prop('disabled', false);
                    refreshCount();
                },
                error: function(xhr, status, error) {
                    console.error('STUDIOU WC UPVP: get_attribute_values failed', status, error);
                    $valueSelect.empty();
                    $valueSelect.append('<option value="">' + (i18n.upvpSelectValue || '-- Select value --') + '</option>');
                    $valueSelect.prop('disabled', false);
                }
            });
        }

        function refreshCount() {
            if (countDebounceHandle) {
                clearTimeout(countDebounceHandle);
            }
            countDebounceHandle = setTimeout(doRefreshCount, 300);
        }

        function doRefreshCount() {
            var cats = getSelectedCategoryIds();
            var key  = $attrSelect.val();
            var val  = $valueSelect.val();

            if (!cats.length || !key || !val) {
                $countLabel.text('0');
                setApplyEnabled(0);
                return;
            }

            countInFlight = true;
            setApplyEnabled(0);

            $.ajax({
                url: studiouWcpcm.ajaxUrl,
                type: 'POST',
                data: {
                    action: 'studiou_wcpcm_upvp_count',
                    nonce: studiouWcpcm.nonce,
                    category_ids: cats,
                    attribute_key: key,
                    attribute_value: val
                },
                success: function(response) {
                    countInFlight = false;
                    if (response.success && response.data) {
                        var c = parseInt(response.data.count, 10) || 0;
                        $countLabel.text(c);
                        setApplyEnabled(c);
                    } else {
                        $countLabel.text('0');
                        setApplyEnabled(0);
                    }
                },
                error: function() {
                    countInFlight = false;
                    $countLabel.text('0');
                    setApplyEnabled(0);
                }
            });
        }

        function renderSampleTable(sample, newPriceLabel) {
            if (!sample || !sample.length) return '';
            var html = '<table class="studiou-wcpcm-upvp-preview-table">';
            html += '<thead><tr>';
            html += '<th>ID</th><th>SKU</th><th>Name</th><th>Parent</th><th>Current</th>';
            if (newPriceLabel !== undefined) html += '<th>New</th>';
            html += '</tr></thead><tbody>';
            $.each(sample, function(_, r) {
                html += '<tr>';
                html += '<td>' + r.id + '</td>';
                html += '<td>' + (r.sku || '') + '</td>';
                html += '<td>' + (r.name || '') + '</td>';
                html += '<td>' + (r.parent_name || '') + '</td>';
                html += '<td>' + (r.current_price || '') + '</td>';
                if (newPriceLabel !== undefined) html += '<td>' + newPriceLabel + '</td>';
                html += '</tr>';
            });
            html += '</tbody></table>';
            return html;
        }

        // Wire up Check All / Uncheck All
        $('#studiou-wcpcm-upvp-check-all').on('click', function(e) {
            e.preventDefault();
            $catList.find('input[type="checkbox"]').prop('checked', true);
            refreshCount();
        });
        $('#studiou-wcpcm-upvp-uncheck-all').on('click', function(e) {
            e.preventDefault();
            $catList.find('input[type="checkbox"]').prop('checked', false);
            refreshCount();
        });

        $catList.on('change', 'input[type="checkbox"]', refreshCount);
        $attrSelect.on('change', loadValues);
        $valueSelect.on('change', refreshCount);

        // Dry Run
        $dryRunBtn.on('click', function(e) {
            e.preventDefault();
            var cats = getSelectedCategoryIds();
            var key  = $attrSelect.val();
            var val  = $valueSelect.val();

            if (!cats.length) {
                showNotice('error', i18n.selectAtLeastOneCategory || 'Please select at least one category');
                return;
            }
            if (!key) {
                showNotice('error', i18n.upvpSelectAttribute || 'Please select an attribute');
                return;
            }
            if (!val) {
                showNotice('error', i18n.upvpSelectValue || 'Please select an attribute value');
                return;
            }

            $('.studiou-wcpcm-notice-area').empty();
            $resultsBox.hide();
            $spinner.css('visibility', 'visible');
            $dryRunBtn.prop('disabled', true);
            $applyBtn.prop('disabled', true);

            $.ajax({
                url: studiouWcpcm.ajaxUrl,
                type: 'POST',
                data: {
                    action: 'studiou_wcpcm_upvp_count',
                    nonce: studiouWcpcm.nonce,
                    category_ids: cats,
                    attribute_key: key,
                    attribute_value: val
                },
                success: function(response) {
                    if (response.success && response.data) {
                        var c       = parseInt(response.data.count, 10) || 0;
                        var sample  = response.data.sample || [];
                        var price   = $newPrice.val();
                        var msg     = '';
                        if (c === 0) {
                            msg = '<p>' + (i18n.upvpNoMatches || 'No variations match the current filter.') + '</p>';
                        } else {
                            var tpl = i18n.upvpDryRunComplete || 'Dry run complete: %d variations would be updated to %s.';
                            msg = '<p>' + tpl.replace('%d', c).replace('%s', price !== '' ? price : '—') + '</p>';
                            msg += renderSampleTable(sample, price !== '' ? price : undefined);
                        }
                        $resultsMsg.html(msg);
                        $resultsBox.show();
                        $countLabel.text(c);
                        setApplyEnabled(c);
                    } else {
                        showNotice('error', (response.data && response.data.message) || 'Dry run failed');
                    }
                },
                error: function(xhr, status, error) {
                    showNotice('error', 'Dry run error: ' + error);
                },
                complete: function() {
                    $spinner.css('visibility', 'hidden');
                }
            });
        });

        // Apply
        $applyBtn.on('click', function(e) {
            e.preventDefault();
            var cats  = getSelectedCategoryIds();
            var key   = $attrSelect.val();
            var val   = $valueSelect.val();
            var price = $newPrice.val();
            var count = parseInt($countLabel.text(), 10) || 0;

            if (!cats.length) {
                showNotice('error', i18n.selectAtLeastOneCategory || 'Please select at least one category');
                return;
            }
            if (!key) {
                showNotice('error', i18n.upvpSelectAttribute || 'Please select an attribute');
                return;
            }
            if (!val) {
                showNotice('error', i18n.upvpSelectValue || 'Please select an attribute value');
                return;
            }
            if (price === '' || isNaN(parseFloat(price)) || parseFloat(price) < 0) {
                showNotice('error', i18n.upvpInvalidPrice || 'Please enter a valid new price');
                return;
            }

            var confirmTpl = i18n.upvpConfirmApply || 'Are you sure you want to update %d variations?';
            if (!confirm(confirmTpl.replace('%d', count))) {
                return;
            }

            $('.studiou-wcpcm-notice-area').empty();
            $resultsBox.hide();
            $spinner.css('visibility', 'visible');
            $dryRunBtn.prop('disabled', true);
            $applyBtn.prop('disabled', true);

            $.ajax({
                url: studiouWcpcm.ajaxUrl,
                type: 'POST',
                data: {
                    action: 'studiou_wcpcm_upvp_apply',
                    nonce: studiouWcpcm.nonce,
                    category_ids: cats,
                    attribute_key: key,
                    attribute_value: val,
                    new_price: price
                },
                success: function(response) {
                    if (response.success && response.data) {
                        showNotice('success', i18n.upvpApplySuccess || 'Variant prices updated successfully');
                        var html = '<p><strong>' + (response.data.message || '') + '</strong></p>';
                        if (response.data.failed_ids && response.data.failed_ids.length) {
                            html += '<p>Failed IDs: ' + response.data.failed_ids.join(', ') + '</p>';
                        }
                        $resultsMsg.html(html);
                        $resultsBox.show();
                        refreshCount();
                    } else {
                        showNotice('error', (response.data && response.data.message) || (i18n.upvpApplyError || 'Variant prices update error'));
                    }
                },
                error: function(xhr, status, error) {
                    showNotice('error', (i18n.upvpApplyError || 'Variant prices update error') + ': ' + error);
                },
                complete: function() {
                    $spinner.css('visibility', 'hidden');
                    $dryRunBtn.prop('disabled', false);
                    $applyBtn.prop('disabled', false);
                }
            });
        });

        // Initial load
        loadAttributes();
        setApplyEnabled(0);
    }

})(jQuery);