<?php
/**
 * Uninstall Handler
 *
 * Fired when the plugin is uninstalled. Removes plugin data based on settings.
 *
 * @package   RobotsTxt\DocumentationMarkdown
 * @author    ROBOTSTXT
 * @license   GPL-3.0-or-later
 * @link      https://github.com/robotstxt/documentation-markdown
 * @since     1.0.0
 */

// Exit if accessed directly or not called from WordPress.
if ( ! defined( 'WP_UNINSTALL_PLUGIN' ) ) {
	exit;
}

/**
 * Uninstall the plugin
 *
 * Removes plugin data if user has enabled the cleanup option.
 * IMPORTANT: Does NOT delete synced content (posts/pages), only mapping
 * configurations and plugin settings.
 *
 * @since 1.0.0
 *
 * @return void
 */
function robotstxt_docmd_uninstall(): void {
	// Get plugin settings.
	$settings = get_option( 'robotstxt_docmd_settings', array() );

	// Check if user wants to delete data on uninstall.
	if ( empty( $settings['delete_on_uninstall'] ) ) {
		// User chose to keep data, do nothing.
		return;
	}

	global $wpdb;

	// Delete all mapping posts (CPT).
	$mapping_ids = $wpdb->get_col(
		$wpdb->prepare(
			"SELECT ID FROM {$wpdb->posts} WHERE post_type = %s",
			'robotstxt_map'
		)
	);

	foreach ( $mapping_ids as $mapping_id ) {
		// Force delete (bypass trash).
		wp_delete_post( $mapping_id, true );
	}

	// Delete all plugin-specific post meta.
	$wpdb->query(
		"DELETE FROM {$wpdb->postmeta}
		WHERE meta_key LIKE '_robotstxt_docmd_%'"
	);

	// Delete plugin options.
	delete_option( 'robotstxt_docmd_settings' );

	// Delete transients (cached data).
	$wpdb->query(
		$wpdb->prepare(
			"DELETE FROM {$wpdb->options}
			WHERE option_name LIKE %s",
			$wpdb->esc_like( '_transient_robotstxt_docmd_' ) . '%'
		)
	);

	$wpdb->query(
		$wpdb->prepare(
			"DELETE FROM {$wpdb->options}
			WHERE option_name LIKE %s",
			$wpdb->esc_like( '_transient_timeout_robotstxt_docmd_' ) . '%'
		)
	);

	// Clear all scheduled cron events for each mapping.
	foreach ( $mapping_ids as $mapping_id ) {
		$hook      = 'robotstxt_docmd_sync_event';
		$args      = array( $mapping_id );
		$timestamp = wp_next_scheduled( $hook, $args );
		if ( $timestamp ) {
			wp_unschedule_event( $timestamp, $hook, $args );
		}
	}

	// Clear notification transients.
	$wpdb->query(
		$wpdb->prepare(
			"DELETE FROM {$wpdb->options}
			WHERE option_name LIKE %s",
			$wpdb->esc_like( '_transient_robotstxt_docmd_notification_' ) . '%'
		)
	);

	$wpdb->query(
		$wpdb->prepare(
			"DELETE FROM {$wpdb->options}
			WHERE option_name LIKE %s",
			$wpdb->esc_like( '_transient_timeout_robotstxt_docmd_notification_' ) . '%'
		)
	);

	// Note: We deliberately DO NOT delete the synced posts/pages themselves.
	// Users may want to keep the documentation even after uninstalling the plugin.
}

// Run uninstall.
robotstxt_docmd_uninstall();