<?php

/*
 * Base REST Controller for flutter
 *
 * @since 1.4.0
 *
 * @package home
 */

class FlutterHome extends WP_REST_Controller {

	/**
	 * Endpoint namespace
	 *
	 * @var string
	 */
	protected $namespace       = 'wc/v2/flutter';//prefix must be wc/ or wc- to reuse check permission function in woo commerce
	protected $namespace_v3    = 'wc/v3/flutter';
	private $whilelist         = [ 'id', 'name', 'slug', 'permalink', 'date_created', 'date_created_gmt', 'date_modified', 'date_modified_gmt', 'type', 'status', 'featured', 'catalog_visibility', 'description', 'short_description', 'sku', 'price', 'regular_price', 'sale_price', 'date_on_sale_from', 'date_on_sale_from_gmt', 'date_on_sale_to', 'date_on_sale_to_gmt', 'price_html', 'on_sale', 'purchasable', 'total_sales', 'virtual', 'downloadable', 'downloads', 'download_limit', 'download_expiry', 'external_url', 'button_text', 'tax_status', 'tax_class', 'manage_stock', 'stock_quantity', 'stock_status', 'backorders', 'backorders_allowed', 'backordered', 'sold_individually', 'weight', 'dimensions', 'shipping_required', 'shipping_taxable', 'shipping_class', 'shipping_class_id', 'reviews_allowed', 'average_rating', 'rating_count', 'related_ids', 'upsell_ids', 'cross_sell_ids', 'parent_id', 'purchase_note', 'categories', 'tags', 'images', 'attributes', 'default_attributes', 'variations', 'grouped_products', 'menu_order', 'meta_data', 'store', 'attributesData' ];
	private $metaDataWhilelist = [ 'wc_appointments_', '_aftership_', '_wcfmd_', '_orddd_', '_minmax_product_', 'product_id', 'order_id', 'staff_ids', '_video_url', '_woofv_video_embed', '_product_addons' ];
	private $supportedLayouts  = [ 'fourColumn', 'threeColumn', 'twoColumn', 'staggered', 'saleOff', 'card', 'listTile', 'largeCardHorizontalListItems', 'largeCard', 'simpleVerticalListItems', 'simpleList' ];
	/**
	 * Register all routes releated with stores
	 *
	 * @return void
	 */
	public function __construct() {
		add_action( 'rest_api_init', [ $this, 'register_flutter_routes' ] );
		add_filter( 'wp_rest_cache/allowed_endpoints', [ $this, 'wprc_add_flutter_endpoints' ] );
	}

	/**
	 * Register the flutter caching endpoints so they will be cached.
	 */
	function wprc_add_flutter_endpoints( $allowed_endpoints ) {
		if ( ! isset( $allowed_endpoints[ $this->namespace ] ) || ! in_array( 'cache', $allowed_endpoints[ $this->namespace ] ) ) {
			$allowed_endpoints[ $this->namespace ][] = 'cache';
			$allowed_endpoints[ $this->namespace ][] = 'category/cache';
			$allowed_endpoints[ $this->namespace ][] = 'widgets/cache';
		}
		return $allowed_endpoints;
	}

	public function register_flutter_routes() {
		$cache = [
			'args' => [],
			[
				'methods'             => WP_REST_Server::READABLE,
				'callback'            => [ $this, 'get_home_data' ],
				'permission_callback' => [ $this, 'flutter_get_items_permissions_check' ],
			],
		];
		register_rest_route( $this->namespace, '/cache', $cache );
		register_rest_route( $this->namespace_v3, '/cache', $cache );

		$categoryCache = [
			'args' => [],
			[
				'methods'             => WP_REST_Server::READABLE,
				'callback'            => [ $this, 'get_category_data' ],
				'permission_callback' => [ $this, 'flutter_get_items_permissions_check' ],
			],
		];
		register_rest_route( $this->namespace, '/category/cache', $categoryCache );
		register_rest_route( $this->namespace_v3, '/category/cache', $categoryCache );

		$widgetCache = [
			'args' => [],
			[
				'methods'             => WP_REST_Server::READABLE,
				'callback'            => [ $this, 'get_widgets_data' ],
				'permission_callback' => [ $this, 'flutter_get_items_permissions_check' ],
			],
		];
		register_rest_route( $this->namespace, '/widgets/cache', $widgetCache );
		register_rest_route( $this->namespace_v3, '/widgets/cache', $widgetCache );
	}

	public function flutter_get_items_permissions_check() {
		return get_option( 'maanstore_purchase_code' ) === '1';
	}

	private function get_config_file_path( $lang ) {
		if ( ! isset( $lang ) ) {
			$configs = FlutterUtils::get_all_json_files();
			if ( ! empty( $configs ) ) {
				return FlutterUtils::get_json_file_path( $configs[0] );
			} else {
				return new WP_Error( 'existed_config', "Config file hasn't been uploaded yet.", [ 'status' => 400 ] );
			}
		} else {
			return FlutterUtils::get_json_file_path( 'config_' . $lang . '.json' );
		}
	}

	private function arrayWhitelist( $array, $whitelist ) {
		$results = [];
		for ( $i = 0; $i < count( $array ); $i++ ) {
			$results[] = array_intersect_key(
				$array[ $i ],
				array_flip( $whitelist )
			);
		}
		return $results;
	}

	private function arrayMetaDataWhitelist( $array ) {
		return array_values(
			array_filter(
				$array,
				function( $v, $k ) {
					foreach ( $this->metaDataWhilelist as $whilelist ) {
						if ( strpos( $v->__get( 'key' ), $whilelist ) !== false ) {
							return true;
						}
					}
					return false;
				},
				ARRAY_FILTER_USE_BOTH
			)
		);
	}

	/**
	 * Get Home Data for caching
	 *
	 * @param object $request
	 *
	 * @return json
	 */
	public function get_home_data( $request ) {
		$lang      = sanitize_text_field( $request['lang'] );
		$homeCache = FlutterUtils::get_home_cache_path( $lang );
		if ( $request['reset'] == 'false' && file_exists( $homeCache ) ) {
			$fileContent = file_get_contents( $homeCache );
			return json_decode( $fileContent, true );
		}

		$api  = new WC_REST_Products_Controller();
		$path = $this->get_config_file_path( $lang );
		if ( is_wp_error( $path ) ) {
			return $path;
		}
		if ( file_exists( $path ) ) {
			$fileContent = file_get_contents( $path );
			$array       = json_decode( $fileContent, true );

			//get products for horizontal layout
			$countDataLayout  = 0;
			$results          = [];
			$horizontalLayout = $array['HorizonLayout'];
			foreach ( $horizontalLayout as $layout ) {
				if ( ( isset( $layout['category'] ) || isset( $layout['tag'] ) ) && in_array( $layout['layout'], $this->supportedLayouts ) ) {
					if ( $countDataLayout < 4 ) {
						$layout['data']   = $this->getProductsByLayout( $layout, $api, $request );
						$countDataLayout += 1;
					}
					$results[] = $layout;
				} else {
					if ( isset( $layout['items'] ) && count( $layout['items'] ) > 0 ) {
						$items = [];
						foreach ( $layout['items'] as $item ) {
							if ( $countDataLayout < 4 && array_key_exists( 'layout', $item ) && in_array( $item['layout'], $this->supportedLayouts ) ) {
								$item['data']     = $this->getProductsByLayout( $item, $api, $request );
								$countDataLayout += 1;
							}

							$items[] = $item;
						}
						$layout['items'] = $items;
					}
					$results[] = $layout;
				}
			}
			$array['HorizonLayout'] = $results;

			//get products for vertical layout
			if ( isset( $array['VerticalLayout'] ) ) {
				$layout = $array['VerticalLayout'];
				if ( isset( $layout['category'] ) ) {
					if ( $countDataLayout < 4 ) {
						$layout['data']   = $this->getProductsByLayout( $layout, $api, $request );
						$countDataLayout += 1;
					}
					$array['VerticalLayout'] = $layout;
				}
			}

			//save data to  cache file
			file_put_contents( $homeCache, json_encode( $array ) );

			return $array;
		} else {
			return new WP_Error( 'existed_config', "Config file hasn't been uploaded yet.", [ 'status' => 400 ] );
		}
	}

	function getProductsByLayout( $layout, $api, $request ) {
		if ( ( ! isset( $layout['category'] ) && ! isset( $layout['tag'] ) ) || ( isset( $layout['category'] ) && ( $layout['category'] == null || $layout['category'] == '-1' ) ) || ( isset( $layout['tag'] ) && ( $layout['tag'] == null || $layout['tag'] == '-1' ) ) ) {
			return [];
		}
		$params = [
			'order'   => 'desc',
			'orderby' => 'date',
			'status'  => 'publish',
		];
		if ( isset( $layout['category'] ) ) {
			$params['category'] = $layout['category'];
		}
		if ( isset( $layout['tag'] ) ) {
			$params['tag'] = $layout['tag'];
		}
		if ( isset( $layout['feature'] ) ) {
			$params['feature'] = $layout['feature'];
		}
		if ( isset( $layout['layout'] ) && $layout['layout'] == 'saleOff' ) {
			$params['on_sale'] = 'true';
		}
		$limit              = get_option( 'maanstore_limit_product' );
		$limit              = ( ! isset( $limit ) || $limit == false ) ? 10 : $limit;
		$limit              = isset( $layout['limit'] ) && is_int( $layout['limit'] ) ? $layout['limit'] : $limit;
		$params['per_page'] = $limit;
		$params['page']     = 0;

		$request->set_query_params( $params );

		$response = $api->get_items( $request );
		$products = $response->get_data();
		$products = $this->arrayWhitelist( $products, $this->whilelist );
		foreach ( $products as &$value ) {
			if ( isset( $value['meta_data'] ) ) {
				$value['meta_data'] = $this->arrayMetaDataWhitelist( $value['meta_data'] );
			}
		}
		return $products;
	}


	/**
	 * Get Category Data for caching
	 *
	 * @param object $request
	 *
	 * @return json
	 */
	public function get_category_data( $request ) {
		$api = new WC_REST_Products_Controller();
		$ids = $request['categoryIds'];
		if ( isset( $ids ) ) {
			$ids = explode( ',', $ids );
		} else {
			$ids = [];
		}

		if ( count( $ids ) > 0 ) {
			$results = [];
			foreach ( $ids as $id ) {
				$results[ $id ] = $this->getProductsByLayout( [ 'category' => $id ], $api, $request );
			}
			return $results;
		} else {
			return new WP_Error( 'empty_ids', 'categoryIds is empty', [ 'status' => 400 ] );
		}
	}

	public function get_widgets_data( $request ) {
		$api  = new WC_REST_Products_Controller();
		$path = $this->get_config_file_path( sanitize_text_field( $request['lang'] ) );
		if ( is_wp_error( $path ) ) {
			return $path;
		}

		if ( file_exists( $path ) ) {
			$fileContent = file_get_contents( $path );
			$array       = json_decode( $fileContent, true );

			if ( isset( $array['Widgets'] ) ) {
				$layout = $array['Widgets'];
				if ( isset( $layout['category'] ) || isset( $layout['tag'] ) ) {
					$layout['data'] = $this->getProductsByLayout( $layout, $api, $request );
				}
				return $layout;
			} else {
				return new WP_Error( 'invalid_format', "The config file doesn't have 'Widgets' property", [ 'status' => 400 ] );
			}
		} else {
			return new WP_Error( 'existed_config', "Config file hasn't been uploaded yet.", [ 'status' => 400 ] );
		}
	}

}

new FlutterHome();