<?php
/**
 * Privacy Handler for GDPR compliance.
 *
 * @package AgentShop
 */

namespace AgentShop\Privacy;

defined( 'ABSPATH' ) || exit;

/**
 * Handler class.
 */
class Handler {

	/**
	 * Export personal data.
	 *
	 * Following WordPress best practice: query by email first, then check meta per item.
	 *
	 * @param string $email_address Email address.
	 * @param int    $page          Page number.
	 * @return array
	 */
	public static function export_personal_data( $email_address, $page = 1 ) {
		$data_to_export = array();

		// Query orders by email (fast, indexed query).
		$orders = wc_get_orders(
			array(
				'billing_email' => $email_address,
				'limit'         => 10,
				'paged'         => $page,
			)
		);

		foreach ( $orders as $order ) {
			// Check if this order has any AgentShop tracking meta.
			$tracked_at   = $order->get_meta( '_agentshop_tracked' );
			$customer_id  = $order->get_meta( '_agentshop_customer_id' );
			$session_id   = $order->get_meta( '_agentshop_session_id' );
			$llm_source   = $order->get_meta( '_agentshop_llm_source' );

			// Only include if we have any tracking data.
			if ( $tracked_at || $customer_id || $session_id || $llm_source ) {
				$order_data = array(
					array(
						'name'  => __( 'Order ID', 'agentshop' ),
						'value' => $order->get_id(),
					),
				);

				if ( $tracked_at ) {
					$order_data[] = array(
						'name'  => __( 'Tracked At', 'agentshop' ),
						'value' => date_i18n( get_option( 'date_format' ) . ' ' . get_option( 'time_format' ), $tracked_at ),
					);
				}

				if ( $customer_id ) {
					$order_data[] = array(
						'name'  => __( 'Customer ID', 'agentshop' ),
						'value' => $customer_id,
					);
				}

				if ( $session_id ) {
					$order_data[] = array(
						'name'  => __( 'Session ID', 'agentshop' ),
						'value' => $session_id,
					);
				}

				if ( $llm_source ) {
					$order_data[] = array(
						'name'  => __( 'LLM Source', 'agentshop' ),
						'value' => $llm_source,
					);
				}

				$data_to_export[] = array(
					'group_id'          => 'agentshop_tracking',
					'group_label'       => __( 'AgentShop Tracking Data', 'agentshop' ),
					'group_description' => __( 'Order tracking data collected by AgentShop.', 'agentshop' ),
					'item_id'           => 'order-' . $order->get_id(),
					'data'              => $order_data,
				);
			}
		}

		return array(
			'data' => $data_to_export,
			'done' => count( $orders ) < 10,
		);
	}

	/**
	 * Erase personal data.
	 *
	 * Following WordPress best practice: query by email first, then check/delete meta per item.
	 *
	 * @param string $email_address Email address.
	 * @param int    $page          Page number.
	 * @return array
	 */
	public static function erase_personal_data( $email_address, $page = 1 ) {
		$items_removed  = false;
		$items_retained = false;
		$messages       = array();

		// Query orders by email (fast, indexed query).
		$orders = wc_get_orders(
			array(
				'billing_email' => $email_address,
				'limit'         => 10,
				'paged'         => $page,
			)
		);

		foreach ( $orders as $order ) {
			// Check if this order has any AgentShop tracking meta.
			$has_tracking_data = $order->get_meta( '_agentshop_tracked' )
				|| $order->get_meta( '_agentshop_customer_id' )
				|| $order->get_meta( '_agentshop_session_id' )
				|| $order->get_meta( '_agentshop_llm_source' );

			if ( $has_tracking_data ) {
				// Remove all AgentShop tracking meta.
				$order->delete_meta_data( '_agentshop_tracked' );
				$order->delete_meta_data( '_agentshop_customer_id' );
				$order->delete_meta_data( '_agentshop_session_id' );
				$order->delete_meta_data( '_agentshop_llm_source' );
				$order->save();
				$items_removed = true;
			}
		}

		// Note: We cannot erase data from the AgentShop backend from here.
		// The user should contact AgentShop directly for full data deletion.
		if ( $items_removed ) {
			$messages[] = __( 'AgentShop tracking metadata has been removed from orders. For complete data deletion from AgentShop servers, please contact info@useagentshop.com', 'agentshop' );
		}

		return array(
			'items_removed'  => $items_removed,
			'items_retained' => $items_retained,
			'messages'       => $messages,
			'done'           => count( $orders ) < 10,
		);
	}
}