<?php
/**
 * Helper functions for the plugin.
 *
 * @package    QDR_Temporary_Shared_Storage
 * @since      1.0.0
 */

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

/**
 * Format bytes to human readable format.
 *
 * @since 1.0.0
 * @param int $bytes     The size in bytes.
 * @param int $precision The number of decimal places.
 * @return string Human readable size.
 */
function qdr_tss_format_bytes($bytes, $precision = 2) {
    $units = array('B', 'KB', 'MB', 'GB', 'TB');
    
    $bytes = max($bytes, 0);
    $pow = floor(($bytes ? log($bytes) : 0) / log(1024));
    $pow = min($pow, count($units) - 1);
    
    $bytes /= pow(1024, $pow);
    
    return round($bytes, $precision) . ' ' . $units[$pow];
}

/**
 * Format date to localized format.
 *
 * @since 1.0.0
 * @param string $date_string Date string in MySQL format.
 * @return string Formatted date.
 */
function qdr_tss_format_date($date_string) {
    if (!$date_string || $date_string === '0000-00-00 00:00:00') {
        return '-';
    }
    
    $date = strtotime($date_string);
    return date_i18n(get_option('date_format') . ' ' . get_option('time_format'), $date);
}

/**
 * Check if a date is expired.
 *
 * @since 1.0.0
 * @param string $date_string Date string in MySQL format.
 * @return bool True if date is expired, false otherwise.
 */
function qdr_tss_is_expired($date_string) {
    if (!$date_string || $date_string === '0000-00-00 00:00:00') {
        return false;
    }
    
    $expiry_date = strtotime($date_string);
    $current_time = current_time('timestamp');
    
    return $current_time > $expiry_date;
}

/**
 * Check if a date is in the future.
 *
 * @since 1.0.0
 * @param string $date_string Date string in MySQL format.
 * @return bool True if date is in the future, false otherwise.
 */
function qdr_tss_is_future($date_string) {
    if (!$date_string || $date_string === '0000-00-00 00:00:00') {
        return false;
    }
    
    $future_date = strtotime($date_string);
    $current_time = current_time('timestamp');
    
    return $current_time < $future_date;
}

/**
 * Get file status class based on active dates.
 *
 * @since 1.0.0
 * @param string $active_from Active from date in MySQL format.
 * @param string $active_to   Active to date in MySQL format.
 * @return string CSS class for status.
 */
function qdr_tss_get_status_class($active_from, $active_to) {
    $current_time = current_time('timestamp');
    $from_time = strtotime($active_from);
    $to_time = strtotime($active_to);
    
    if ($current_time < $from_time) {
        return 'qdr-tss-status-pending';
    } elseif ($current_time > $to_time) {
        return 'qdr-tss-status-expired';
    } else {
        return 'qdr-tss-status-active';
    }
}

/**
 * Get file status label based on active dates.
 *
 * @since 1.0.0
 * @param string $active_from Active from date in MySQL format.
 * @param string $active_to   Active to date in MySQL format.
 * @return string Status label.
 */
function qdr_tss_get_status_label($active_from, $active_to) {
    $current_time = current_time('timestamp');
    $from_time = strtotime($active_from);
    $to_time = strtotime($active_to);
    
    if ($current_time < $from_time) {
        return __('Pending', 'qdr-temporary-shared-storage');
    } elseif ($current_time > $to_time) {
        return __('Expired', 'qdr-temporary-shared-storage');
    } else {
        return __('Active', 'qdr-temporary-shared-storage');
    }
}