<?php
/**
 * Uninstall Script for Instagram Gallery Sync Pro
 *
 * This file runs when the plugin is deleted from WordPress.
 * It removes all plugin data including:
 * - Custom database tables
 * - Plugin options
 * - Uploaded images
 * - Transients
 *
 * @package Instagram_Gallery_Sync_Pro
 */

// Exit if not called by WordPress
if (!defined('WP_UNINSTALL_PLUGIN')) {
    exit;
}

// Require WordPress database class
global $wpdb;

/**
 * Remove all plugin options
 */
$options_to_delete = array(
    // Instagram settings
    'igsp_username',
    'igsp_max_images',
    'igsp_save_locally',
    'igsp_image_quality',
    'igsp_sync_interval',
    'igsp_last_sync',

    // Layout settings
    'igsp_layout_type',
    'igsp_columns_desktop',
    'igsp_columns_tablet',
    'igsp_columns_mobile',
    'igsp_spacing',
    'igsp_padding',
    'igsp_aspect_ratio',
    'igsp_object_fit',
    'igsp_border_radius',
    'igsp_hover_effect',

    // Display settings
    'igsp_display_limit',
    'igsp_order',
    'igsp_show_caption',
    'igsp_caption_position',
    'igsp_show_instagram_btn',
    'igsp_link_behavior',
    'igsp_lightbox',
    'igsp_lazy_loading',
    'igsp_loader_type',

    // Styling
    'igsp_primary_color',
    'igsp_hover_color',
    'igsp_text_color',
    'igsp_caption_font_size',
    'igsp_custom_css',
    'igsp_css_prefix',

    // Advanced
    'igsp_debug_mode',
    'igsp_cache_duration',
    'igsp_request_timeout',
    'igsp_user_agent',
    'igsp_proxy_host',
    'igsp_proxy_port',
    'igsp_auto_delete_days',

    // Database version
    'igsp_db_version',
);

foreach ($options_to_delete as $option) {
    delete_option($option);
}

/**
 * Drop custom database tables
 */
$tables = array(
    $wpdb->prefix . 'instagram_gallery_posts',
    $wpdb->prefix . 'instagram_gallery_log',
);

foreach ($tables as $table) {
    $wpdb->query("DROP TABLE IF EXISTS {$table}");
}

/**
 * Delete all transients
 */
$wpdb->query(
    "DELETE FROM {$wpdb->options} 
     WHERE option_name LIKE '_transient_igsp_%' 
     OR option_name LIKE '_transient_timeout_igsp_%'"
);

/**
 * Remove uploaded images directory
 */
$upload_dir = wp_upload_dir();
$instagram_dir = $upload_dir['basedir'] . '/instagram-gallery';

if (is_dir($instagram_dir)) {
    igsp_recursive_delete($instagram_dir);
}

/**
 * Recursively delete a directory and its contents
 *
 * @param string $dir Directory path
 * @return bool
 */
function igsp_recursive_delete($dir)
{
    if (!is_dir($dir)) {
        return false;
    }

    $files = array_diff(scandir($dir), array('.', '..'));

    foreach ($files as $file) {
        $path = $dir . '/' . $file;

        if (is_dir($path)) {
            igsp_recursive_delete($path);
        } else {
            unlink($path);
        }
    }

    return rmdir($dir);
}

/**
 * Clear scheduled cron events
 */
$timestamp = wp_next_scheduled('igsp_sync_instagram');
if ($timestamp) {
    wp_unschedule_event($timestamp, 'igsp_sync_instagram');
}

// Clear any remaining cron events
wp_clear_scheduled_hook('igsp_sync_instagram');
wp_clear_scheduled_hook('igsp_cleanup_logs');

/**
 * Flush rewrite rules
 */
flush_rewrite_rules();