<?php
/**
 * Plugin Name: QDR - Studiou WC Free Photo Product
 * Plugin URI: https://www.quadarax.com/plugins/studiou-wc-free-photo-product
 * Description: Allows publishing special WooCommerce products with variants and custom raw image upload for photo printing
 * Version: 1.5.12
 * Requires at least: 6.9.4
 * Requires PHP: 8.2
 * Requires Plugins: woocommerce, product-variant-table-for-woocommerce
 * Author: Dalibor Votruba
 * Author URI: https://www.quadarax.com
 * License: GPL v2 or later
 * License URI: https://www.gnu.org/licenses/gpl-2.0.html
 * Text Domain: studiou-wc-free-photo-product
 * Domain Path: /languages
 * WC requires at least: 10.0
 * WC tested up to: 10.6
 * Woo: 12346:a9b8c7d6e5f4a3b2c1d0e9f8a7b6c5d4
 */

if (!defined('WPINC')) {
    die;
}

if (!defined('STUDIOU_WCFPP_VERSION')) define('STUDIOU_WCFPP_VERSION', '1.5.12');
if (!defined('STUDIOU_WCFPP_PLUGIN_DIR')) define('STUDIOU_WCFPP_PLUGIN_DIR', plugin_dir_path(__FILE__));
if (!defined('STUDIOU_WCFPP_PLUGIN_URL')) define('STUDIOU_WCFPP_PLUGIN_URL', plugin_dir_url(__FILE__));
if (!defined('STUDIOU_WCFPP_PLUGIN_BASENAME')) define('STUDIOU_WCFPP_PLUGIN_BASENAME', plugin_basename(__FILE__));
if (!defined('STUDIOU_WCFPP_CHUNK_SIZE')) define('STUDIOU_WCFPP_CHUNK_SIZE', 1024 * 1024); // 1MB chunks

class Studiou_WC_Free_Photo_Product {

    /** @var Studiou_WC_FPP_DB */
    private $db;

    /** @var Studiou_WC_FPP_Product */
    private $product;

    /** @var Studiou_WC_FPP_Upload */
    private $upload;

    /** @var Studiou_WC_FPP_Shortcode */
    private $shortcode;

    /** @var Studiou_WC_FPP_Single_Product */
    private $single_product;

    /** @var Studiou_WC_FPP_Cart */
    private $cart;

    /** @var Studiou_WC_FPP_Admin */
    private $admin;

    /** @var Studiou_WC_FPP_Pricing */
    private $pricing;

    public function __construct() {
        $this->load_dependencies();
        add_action('admin_init', array($this, 'check_required_plugins'));
        add_action('admin_menu', array($this, 'add_admin_menu'), 99);
        add_action('admin_enqueue_scripts', array($this, 'register_admin_assets'));
        add_action('wp_enqueue_scripts', array($this, 'register_frontend_assets'));
        $this->init_components();
        add_action('before_woocommerce_init', array($this, 'declare_hpos_compatibility'));
        // Override WC core strings with FPP-specific wording (e.g. cart "Estimated total"
        // → "Součet" in cs_CZ). Translation lives in our .po so it stays locale-aware.
        add_filter('gettext_woocommerce', array($this, 'override_wc_strings'), 10, 2);
    }

    /**
     * Reword selected WooCommerce core strings via our own textdomain so translations
     * stay centralized in languages/studiou-wc-free-photo-product-*.po.
     */
    public function override_wc_strings($translation, $text) {
        if ($text === 'Estimated total') {
            return __('Total', 'studiou-wc-free-photo-product');
        }
        return $translation;
    }

    private function load_dependencies() {
        require_once STUDIOU_WCFPP_PLUGIN_DIR . 'includes/class-studiou-wc-fpp-db.php';
        require_once STUDIOU_WCFPP_PLUGIN_DIR . 'includes/class-studiou-wc-fpp-product.php';
        require_once STUDIOU_WCFPP_PLUGIN_DIR . 'includes/class-studiou-wc-fpp-upload.php';
        require_once STUDIOU_WCFPP_PLUGIN_DIR . 'includes/class-studiou-wc-fpp-shortcode.php';
        require_once STUDIOU_WCFPP_PLUGIN_DIR . 'includes/class-studiou-wc-fpp-single-product.php';
        require_once STUDIOU_WCFPP_PLUGIN_DIR . 'includes/class-studiou-wc-fpp-cart.php';
        require_once STUDIOU_WCFPP_PLUGIN_DIR . 'includes/class-studiou-wc-fpp-admin.php';
        require_once STUDIOU_WCFPP_PLUGIN_DIR . 'includes/class-studiou-wc-fpp-pricing.php';
    }

    private function init_components() {
        $this->db = new Studiou_WC_FPP_DB();
        $this->maybe_upgrade_db();
        $this->product = new Studiou_WC_FPP_Product();
        $this->upload = new Studiou_WC_FPP_Upload($this->db);
        $this->shortcode = new Studiou_WC_FPP_Shortcode();
        $this->single_product = new Studiou_WC_FPP_Single_Product($this->db);
        $this->cart = new Studiou_WC_FPP_Cart($this->db);
        $this->admin = new Studiou_WC_FPP_Admin($this->db);
        $this->pricing = new Studiou_WC_FPP_Pricing();
    }

    /**
     * Run dbDelta when the installed schema is older than the current plugin version.
     * dbDelta handles adding the batch_token column and its KEY on existing installs.
     */
    private function maybe_upgrade_db() {
        $installed = get_option('studiou_wcfpp_db_version', '');
        if (version_compare((string) $installed, STUDIOU_WCFPP_VERSION, '<')) {
            $this->db->create_tables();
        }
    }

    public function check_required_plugins() {
        if (!class_exists('WooCommerce')) {
            add_action('admin_notices', function () {
                echo '<div class="notice notice-error"><p>';
                echo esc_html__('QDR - Studiou WC Free Photo Product requires WooCommerce to be installed and activated.', 'studiou-wc-free-photo-product');
                echo '</p></div>';
            });
        }

        if (!self::is_pvtfw_active()) {
            add_action('admin_notices', function () {
                echo '<div class="notice notice-error"><p>';
                echo esc_html__('QDR - Studiou WC Free Photo Product requires the "Product Variant Table for WooCommerce" plugin to be installed and activated.', 'studiou-wc-free-photo-product');
                echo '</p></div>';
            });
        }
    }

    /**
     * Detects whether the Product Variant Table for WooCommerce (pvtfw) plugin is active,
     * regardless of its main file name, by matching the active-plugins list on the folder slug.
     */
    public static function is_pvtfw_active() {
        $slug = 'product-variant-table-for-woocommerce/';
        $active = (array) get_option('active_plugins', array());
        foreach ($active as $plugin) {
            if (strpos($plugin, $slug) === 0) {
                return true;
            }
        }
        if (is_multisite()) {
            $network = (array) get_site_option('active_sitewide_plugins', array());
            foreach (array_keys($network) as $plugin) {
                if (strpos($plugin, $slug) === 0) {
                    return true;
                }
            }
        }
        return false;
    }

    public function declare_hpos_compatibility() {
        if (class_exists('Automattic\WooCommerce\Utilities\FeaturesUtil')) {
            \Automattic\WooCommerce\Utilities\FeaturesUtil::declare_compatibility(
                'custom_order_tables',
                __FILE__,
                true
            );
        }
    }

    public function add_admin_menu() {
        if (class_exists('WooCommerce')) {
            add_submenu_page(
                'edit.php?post_type=product',
                __('Free Photo Files', 'studiou-wc-free-photo-product'),
                __('Free Photo Files', 'studiou-wc-free-photo-product'),
                'manage_woocommerce',
                'studiou-fpp-summary',
                array($this->admin, 'render_summary_page')
            );
        }
    }

    public function register_admin_assets($hook) {
        // Product edit page
        $screen = get_current_screen();
        if ($screen && ($screen->id === 'product' || $screen->post_type === 'product')) {
            wp_enqueue_style(
                'studiou-wcfpp-admin',
                STUDIOU_WCFPP_PLUGIN_URL . 'assets/css/admin.css',
                array(),
                STUDIOU_WCFPP_VERSION
            );
            wp_enqueue_script(
                'studiou-wcfpp-admin',
                STUDIOU_WCFPP_PLUGIN_URL . 'assets/js/admin.js',
                array('jquery'),
                STUDIOU_WCFPP_VERSION,
                true
            );
            wp_localize_script('studiou-wcfpp-admin', 'studiouWcfpp', array(
                'ajaxUrl' => admin_url('admin-ajax.php'),
                'nonce' => wp_create_nonce('studiou-wcfpp-nonce'),
                'i18n' => array(
                    'confirmDelete' => __('Are you sure you want to delete the selected files?', 'studiou-wc-free-photo-product'),
                    'confirmDeleteSingle' => __('Are you sure you want to delete this file?', 'studiou-wc-free-photo-product'),
                    'confirmDownloadZip' => __('Download selected files as ZIP archive?', 'studiou-wc-free-photo-product'),
                    'confirmStatusChange' => __('Are you sure you want to change the status of the selected files?', 'studiou-wc-free-photo-product'),
                    'noFilesSelected' => __('No files selected.', 'studiou-wc-free-photo-product'),
                    'statusUpdated' => __('Status updated.', 'studiou-wc-free-photo-product'),
                    'error' => __('An error occurred.', 'studiou-wc-free-photo-product'),
                    'generatingZip' => __('Generating ZIP archive...', 'studiou-wc-free-photo-product'),
                    'generatingCsv' => __('Generating CSV file...', 'studiou-wc-free-photo-product'),
                    'deleting' => __('Deleting...', 'studiou-wc-free-photo-product'),
                ),
            ));
        }

        // Admin summary page
        if ('product_page_studiou-fpp-summary' === $hook) {
            wp_enqueue_style(
                'studiou-wcfpp-admin',
                STUDIOU_WCFPP_PLUGIN_URL . 'assets/css/admin.css',
                array(),
                STUDIOU_WCFPP_VERSION
            );
            wp_enqueue_script(
                'studiou-wcfpp-admin',
                STUDIOU_WCFPP_PLUGIN_URL . 'assets/js/admin.js',
                array('jquery'),
                STUDIOU_WCFPP_VERSION,
                true
            );
            wp_localize_script('studiou-wcfpp-admin', 'studiouWcfpp', array(
                'ajaxUrl' => admin_url('admin-ajax.php'),
                'nonce' => wp_create_nonce('studiou-wcfpp-nonce'),
                'i18n' => array(
                    'confirmDelete' => __('Are you sure you want to delete the selected files?', 'studiou-wc-free-photo-product'),
                    'confirmDeleteSingle' => __('Are you sure you want to delete this file?', 'studiou-wc-free-photo-product'),
                    'confirmDownloadZip' => __('Download selected files as ZIP archive?', 'studiou-wc-free-photo-product'),
                    'confirmStatusChange' => __('Are you sure you want to change the status of the selected files?', 'studiou-wc-free-photo-product'),
                    'noFilesSelected' => __('No files selected.', 'studiou-wc-free-photo-product'),
                    'statusUpdated' => __('Status updated.', 'studiou-wc-free-photo-product'),
                    'error' => __('An error occurred.', 'studiou-wc-free-photo-product'),
                    'generatingZip' => __('Generating ZIP archive...', 'studiou-wc-free-photo-product'),
                    'generatingCsv' => __('Generating CSV file...', 'studiou-wc-free-photo-product'),
                    'deleting' => __('Deleting...', 'studiou-wc-free-photo-product'),
                ),
            ));
        }
    }

    public function register_frontend_assets() {
        wp_register_style(
            'studiou-wcfpp-frontend',
            STUDIOU_WCFPP_PLUGIN_URL . 'assets/css/frontend.css',
            array(),
            STUDIOU_WCFPP_VERSION
        );
        wp_register_script(
            'studiou-wcfpp-frontend',
            STUDIOU_WCFPP_PLUGIN_URL . 'assets/js/frontend.js',
            array('jquery'),
            STUDIOU_WCFPP_VERSION,
            true
        );
        wp_localize_script('studiou-wcfpp-frontend', 'studiouWcfppFront', array(
            'ajaxUrl' => admin_url('admin-ajax.php'),
            'nonce' => wp_create_nonce('studiou-wcfpp-front-nonce'),
            'chunkSize' => STUDIOU_WCFPP_CHUNK_SIZE,
            'cartUrl' => wc_get_cart_url(),
            'currency' => array(
                // WooCommerce returns these with HTML entities (&#75;&#269; for Kč, &nbsp;
                // embedded in priceFormat). Decoded here so the plain-text price formatter
                // that fills <option> labels renders real characters instead of entities.
                'symbol'            => function_exists('get_woocommerce_currency_symbol') ? html_entity_decode(get_woocommerce_currency_symbol(), ENT_QUOTES | ENT_HTML5, 'UTF-8') : '',
                'priceFormat'       => function_exists('get_woocommerce_price_format') ? html_entity_decode(get_woocommerce_price_format(), ENT_QUOTES | ENT_HTML5, 'UTF-8') : '%1$s%2$s',
                'decimalSeparator'  => function_exists('wc_get_price_decimal_separator') ? wc_get_price_decimal_separator() : '.',
                'thousandSeparator' => function_exists('wc_get_price_thousand_separator') ? wc_get_price_thousand_separator() : ',',
                'decimals'          => function_exists('wc_get_price_decimals') ? wc_get_price_decimals() : 2,
            ),
            'i18n' => array(
                'uploading' => __('Uploading...', 'studiou-wc-free-photo-product'),
                'uploadComplete' => __('Upload complete', 'studiou-wc-free-photo-product'),
                'processing' => __('Processing...', 'studiou-wc-free-photo-product'),
                'uploadError' => __('Upload failed. Please try again.', 'studiou-wc-free-photo-product'),
                'fileTooLarge' => __('File is too large. Maximum size: %s MB', 'studiou-wc-free-photo-product'),
                'selectVariant' => __('Please select a variant.', 'studiou-wc-free-photo-product'),
                'uploadFile' => __('Please upload a file.', 'studiou-wc-free-photo-product'),
                'addedToCart' => __('Product added to cart!', 'studiou-wc-free-photo-product'),
                'addToCartError' => __('Could not add to cart. Please try again.', 'studiou-wc-free-photo-product'),
                'dragDropText' => __('Drag & drop your file here or click to browse', 'studiou-wc-free-photo-product'),
                'removeFile' => __('Remove', 'studiou-wc-free-photo-product'),
                'close' => __('Close', 'studiou-wc-free-photo-product'),
                'enlarge' => __('Enlarge', 'studiou-wc-free-photo-product'),
                'addToCart' => __('Add to cart', 'studiou-wc-free-photo-product'),
                'maxUploadsReached' => __('Maximum number of uploads reached (%d).', 'studiou-wc-free-photo-product'),
                'outOfStock' => __('out of stock', 'studiou-wc-free-photo-product'),
                'error' => __('An error occurred.', 'studiou-wc-free-photo-product'),
                'qtyTiersTitle' => __('Quantity Discount', 'studiou-wc-free-photo-product'),
                'qtyTiersFromQty' => __('From Qty', 'studiou-wc-free-photo-product'),
                'qtyTiersDiscount' => __('Discount', 'studiou-wc-free-photo-product'),
                'qtyTiersUnitPrice' => __('Unit Price', 'studiou-wc-free-photo-product'),
            ),
        ));
    }

    public static function activate() {
        require_once STUDIOU_WCFPP_PLUGIN_DIR . 'includes/class-studiou-wc-fpp-db.php';
        $db = new Studiou_WC_FPP_DB();
        $db->create_tables();

        // Create chunks temp directory
        $upload_dir = wp_upload_dir();
        $chunks_dir = $upload_dir['basedir'] . '/studiou-fpp-chunks';
        if (!file_exists($chunks_dir)) {
            wp_mkdir_p($chunks_dir);
            file_put_contents($chunks_dir . '/.htaccess', 'deny from all');
            file_put_contents($chunks_dir . '/index.php', '<?php // Silence is golden');
        }
    }

    public static function deactivate() {
        // Clean up temp chunks
        $upload_dir = wp_upload_dir();
        $chunks_dir = $upload_dir['basedir'] . '/studiou-fpp-chunks';
        if (is_dir($chunks_dir)) {
            $files = glob($chunks_dir . '/*');
            foreach ($files as $file) {
                if (is_file($file) && basename($file) !== '.htaccess' && basename($file) !== 'index.php') {
                    unlink($file);
                }
            }
        }
    }
}

// Activation/deactivation hooks
register_activation_hook(__FILE__, array('Studiou_WC_Free_Photo_Product', 'activate'));
register_deactivation_hook(__FILE__, array('Studiou_WC_Free_Photo_Product', 'deactivate'));

function run_studiou_wc_free_photo_product() {
    static $initialized = false;
    if ($initialized) {
        return;
    }
    $initialized = true;

    load_plugin_textdomain(
        'studiou-wc-free-photo-product',
        false,
        dirname(plugin_basename(__FILE__)) . '/languages/'
    );

    new Studiou_WC_Free_Photo_Product();
}

add_action('plugins_loaded', 'run_studiou_wc_free_photo_product');