<?php
/**
 * ActiveTrail Catalog Handler
 *
 * @package ActiveTrail_WooCommerce
 * @since 1.0.0
 */

// Prevent direct access.
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * ActiveTrail Catalog Handler Class
 */
class ActiveTrail_Catalog_Handler {

	/**
	 * API Client instance
	 *
	 * @var ActiveTrail_API_Client
	 */
	private $api_client;

	/**
	 * Plugin settings
	 *
	 * @var array
	 */
	private $settings;

	/**
	 * Constructor
	 *
	 * @param ActiveTrail_API_Client $api_client API client instance
	 * @param array                  $settings Plugin settings
	 */
	public function __construct( $api_client, $settings ) {
		$this->api_client = $api_client;
		$this->settings   = $settings;

		$this->init_hooks();
	}

	/**
	 * Initialize WordPress hooks
	 */
	private function init_hooks() {
		// Register REST API endpoints.
		add_action( 'rest_api_init', array( $this, 'register_rest_routes' ) );
	}

	/**
	 * Register REST API routes
	 */
	public function register_rest_routes() {
		register_rest_route(
			'activetrail-for-woocommerce/v1',
			'/catalog',
			array(
				'methods'             => 'GET',
				'callback'            => array( $this, 'get_catalog' ),
				'permission_callback' => '__return_true',
			)
		);
	}

	/**
	 * Get catalog endpoint callback
	 *
	 * @param WP_REST_Request $request Request object
	 * @return WP_REST_Response
	 */
	public function get_catalog( $request ) {
		$this->log( 'Catalog API endpoint called' );

		// Switch to plugin's language setting for translations.
		$locale_switched = $this->switch_to_plugin_language();

		try {
			// Get all published products.
			$args = array(
				'post_type'      => 'product',
				'post_status'    => 'publish',
				'posts_per_page' => -1,
				'fields'         => 'ids',
			);

			$product_ids = get_posts( $args );
			$this->log( 'Found ' . count( $product_ids ) . ' products' );

			$items = array();

			foreach ( $product_ids as $pid ) {
				$product = wc_get_product( $pid );
				if ( ! $product ) {
					continue;
				}

				// Get product image.
				$image_url = '';
				if ( $product->get_image_id() ) {
					$image_url = wp_get_attachment_url( $product->get_image_id() );
				} elseif ( $product->is_type( 'variation' ) && $product->get_parent_id() ) {
					$parent = wc_get_product( $product->get_parent_id() );
					if ( $parent && $parent->get_image_id() ) {
						$image_url = wp_get_attachment_url( $parent->get_image_id() );
					}
				}

				// Use placeholder if no image found.
				if ( empty( $image_url ) ) {
					$image_url = wc_placeholder_img_src();
				}

				// Get full description, fallback to short description.
				$description = $product->get_description();
				if ( empty( $description ) ) {
					$description = $product->get_short_description();
				}
				$description = wp_strip_all_tags( $description );

				// Get product tags.
				$tags  = array();
				$terms = wp_get_post_terms( $pid, 'product_tag', array( 'fields' => 'names' ) );
				if ( ! is_wp_error( $terms ) ) {
					$tags = $terms;
				}

				$items[] = array(
					'id'           => (int) $pid,
					'title'        => $product->get_name(),
					'link'         => get_permalink( $pid ),
					'image_link'   => $image_url,
					'availability' => $product->is_in_stock() ? 'in stock' : 'out of stock',
					'description'  => $description,
					'price'        => (string) wc_get_price_to_display( $product ),
					'sale_price'   => $product->get_sale_price() ? (string) wc_get_price_to_display( $product, array( 'price' => $product->get_sale_price() ) ) : '',
					'condition'    => 'New',
					'product_type' => $product->get_type(),
					'quantity'     => (int) ( $product->get_stock_quantity() ?? 0 ),
					'variant'      => (int) ( $product->is_type( 'variation' ) ? $pid : 0 ),
					'parent_id'    => (int) ( $product->is_type( 'variation' ) ? $product->get_parent_id() : 0 ),
					'tags'         => $tags,
					'sku'          => (string) ( $product->get_sku() ?: '' ),
					'created_at'   => (int) get_post_time( 'U', true, $pid ),
					'updated_at'   => (int) get_post_modified_time( 'U', true, $pid ),
				);
			}

			// Return data in the requested format.
			return rest_ensure_response( array( 'data' => $items ) );
		} finally {
			// Restore original locale.
			if ( $locale_switched ) {
				$this->restore_plugin_language();
			}
		}
	}

	/**
	 * Switch to plugin's configured language
	 *
	 * @return bool True if locale was switched, false otherwise
	 */
	private function switch_to_plugin_language() {
		if ( ! class_exists( 'ActiveTrail_Settings' ) ) {
			require_once ACTIVETRAIL_WC_PLUGIN_DIR . 'includes/settings/class-settings.php';
		}
		$current_language = ActiveTrail_Settings::get_current_language();

		if ( empty( $current_language ) ) {
			return false;
		}

		// Support WPML if installed.
		if ( function_exists( 'icl_object_id' ) && function_exists( 'do_action' ) ) {
			global $sitepress;
			if ( $sitepress ) {
				// Convert language code format if needed (e.g., en_US -> en).
				$wpml_lang = strstr( $current_language, '_', true ) ?: $current_language;
                // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedHooknameFound -- WPML hook
				do_action( 'wpml_switch_language', $wpml_lang );
			}
		}

		// Support Polylang if installed.
		if ( function_exists( 'pll_current_language' ) && function_exists( 'PLL' ) ) {
			$polylang = PLL();
			if ( $polylang ) {
				// Convert language code format if needed.
				$pll_lang          = strstr( $current_language, '_', true ) ?: $current_language;
				$polylang->curlang = $polylang->model->get_language( $pll_lang );
				if ( ! $polylang->curlang ) {
					// Try full code.
					$polylang->curlang = $polylang->model->get_language( $current_language );
				}
			}
		}

		// Switch WordPress locale for text domain translations.
		if ( function_exists( 'switch_to_locale' ) ) {
			return switch_to_locale( $current_language );
		}

		return false;
	}

	/**
	 * Restore original locale
	 */
	private function restore_plugin_language() {
		// Restore WordPress locale.
		if ( function_exists( 'restore_current_locale' ) ) {
			restore_current_locale();
		}

		// WPML and Polylang don't need explicit restoration as they handle it automatically.
	}

	/**
	 * Log message
	 *
	 * @param string $message Log message
	 * @param string $level Log level
	 */
	private function log( $message, $level = 'info' ) {
		if ( function_exists( 'activetrail_logger' ) ) {
			$level_map    = array(
				'info'    => 'INFO',
				'debug'   => 'DEBUG',
				'warning' => 'WARNING',
				'error'   => 'ERROR',
			);
			$mapped_level = isset( $level_map[ $level ] ) ? $level_map[ $level ] : 'INFO';
			activetrail_logger()->log( $message, $mapped_level, 'GENERAL' );
		}
	}
}