<?php

use OneTag\DTO\ContentDTO;
use OneTag\DTO\EventDTO;

if ( ! class_exists( 'OneTagWooCommerce' ) ) {
	class OneTagWooCommerce extends OneTagCore {
		public function __construct() {
			parent::__construct();

			$this->schedule();

			if ( count( $this->settingsDTO->getPixels() ) < 1 ) {
				return;
			}
			$this->setupEventListeners();
		}

		private function schedule() {
			$actionName = 'generate_adsmurai_feed';
			add_action( $actionName, array( $this, 'generateProductFeed' ) );

			if ( ! wp_next_scheduled( $actionName ) ) {
				wp_schedule_event( time(), 'daily', $actionName );
			}
		}

        private function getPluginPath()
        {
            $pluginPath = plugin_dir_path( __FILE__ );
            $tmp = explode("/", $pluginPath);
            $tmp[count($tmp) - 2] = "woocommerce";
            return join("/", $tmp);
        }

		private function setupEventListeners() {
			$events = array(
				array(
					'action' => 'woocommerce_thankyou',
					'method' => 'onPurchase',
					'name'   => EventDTO::EVENT_PURCHASE,
				),
				array(
					'action' => 'woocommerce_add_to_cart',
					'method' => 'addToCart',
					'name'   => EventDTO::EVENT_ADD_TO_CART,
				),
				array(
					'action' => 'woocommerce_ajax_added_to_cart',
					'method' => 'addToCart',
					'name'   => EventDTO::EVENT_ADD_TO_CART,
				),
				array(
					'action' => 'woocommerce_checkout_init',
					'method' => 'onCheckoutStart',
					'name'   => EventDTO::EVENT_INITIATE_CHECKOUT,
				),
				array(
					'action' => 'template_redirect',
					'method' => 'onItemView',
					'name'   => EventDTO::EVENT_VIEW_CONTENT,
				),
			);

			foreach ( $events as $event ) {
				if ( $this->isEventEnabled( $event['name'] ) ) {
					add_action( $event['action'], array( $this, $event['method'] ), 10, 1 );
				}
			}
		}

		function onCheckoutStart( $checkout ) {
			global $woocommerce;
			if ( empty( $woocommerce->cart ) ) {
				return;
			}

			$dto = new EventDTO( EventDTO::EVENT_INITIATE_CHECKOUT );
			$dto->setCurrency( get_woocommerce_currency() );
			$this->fillFromCart( $dto );
			$dto->userData->autoFillData( $checkout->get_posted_data() );

			if ( $dto->getValue() <= 0 ) {
				return;
			}

			$this->sendEvent( $dto );
		}

		private function fillFromCart( $dto ) {
			global $woocommerce;

			if ( empty( $woocommerce->cart ) ) {
				return;
			}

			$contentIds = array();
			$contents   = array();
			foreach ( $woocommerce->cart->cart_contents as $product ) {
				$contentIds[] = $product['product_id'];
				$contentDTO   = ( new ContentDTO() )
					->setId( $product['product_id'] ) // $product['data']->get_sku()
					->setQuantity( $product['quantity'] )
					->setItemPrice( $product['data']->get_price() );
				$contents[]   = $contentDTO;
			}
			$dto->setContents( $contents );
			$dto->setContentIds( $contentIds );
			$dto->setValue( $woocommerce->cart->get_totals()['total'] );
			return $this;
		}

		function onItemView() {
			if ( ! function_exists( 'is_product' ) || ! is_product() ) {
				return;
			}
			global $post;

			if ( empty( $post->ID ) ) {
				return;
			}

			$productId = $post->ID;
			$product   = wc_get_product( $productId );

			$dto = new EventDTO( EventDTO::EVENT_VIEW_CONTENT );
			$dto->setCurrency( get_woocommerce_currency() )
				->setContentIds( array( $productId ) )
				->setValue( $product->get_price() )
				->userData->autoFillData( array() );

			$contentDTO = ( new ContentDTO() )
				->setId( $productId )
				->setQuantity( 1 )
				->setItemPrice( $product->get_price() );
			$dto->setContents( array( $contentDTO ) );

			$this->sendEvent( $dto );
		}

		function onPurchase( $order_id ) {
			$order = wc_get_order( $order_id );
			$data  = $order->get_data();

			$dto = new EventDTO( EventDTO::EVENT_PURCHASE );
			$dto->setCurrency( get_woocommerce_currency() )
				->setValue( $order->get_total() )
				->setOrderId( $order_id );

			$dto->userData->autoFillData( ! empty( $data['billing'] ) ? $data['billing'] : $data['shipping'] );

			$contentIds = array();
			$contents   = array();
			foreach ( $data['line_items'] as $product ) {
				$contentIds[] = $product->get_product_id();
				$contentDTO   = ( new ContentDTO() )
					->setId( $product->get_product_id() ) // $product['data']->get_sku()
					->setQuantity( $product->get_quantity() )
					->setItemPrice( $product->get_total() );
				$contents[]   = $contentDTO;
			}
			$dto->setContents( $contents );
			$dto->setContentIds( $contentIds );

			$this->sendEvent( $dto );
		}

		function addToCart( $cartId ) {
			$dto = new EventDTO( EventDTO::EVENT_ADD_TO_CART );
			$dto->setCurrency( get_woocommerce_currency() );
			$this->fillFromCart( $dto );
			$dto->userData->autoFillData( array() );

			$this->sendEvent( $dto );
		}

		public function getProductFeedUrl() {
			return wp_upload_dir()['baseurl'] . '/' . self::UPLOAD_FOLDER_NAME . '/feed.jsonl';
		}

		public function generateProductFeed() {
			$uploadFolder = wp_upload_dir()['basedir'] . '/' . self::UPLOAD_FOLDER_NAME;
			$url          = $this->getProductFeedUrl();
			$file         = $uploadFolder . '/feed.jsonl';

			if ( ! file_exists( $uploadFolder ) ) {
				wp_mkdir_p( $uploadFolder );
			}

			if ( file_exists( $file ) && gmdate( 'Y-m-d', filemtime( $file ) ) == gmdate( 'Y-m-d' ) ) {
				return $url;
			}

            $functionsFile = $this->getPluginPath() . 'includes/wc-product-functions.php';
			if ( ! function_exists( 'wc_get_products' ) && file_exists( $functionsFile ) ) {
				include_once $functionsFile;
			}
			if ( ! function_exists( 'wc_get_products' ) ) {
				return '';
			}

			file_put_contents( $file, '' );

			$args = array(
				'limit' => -1, // Get all products
			);

			$products = wc_get_products( $args );

			foreach ( $products as $product ) {
				// Get the product images
				$image_ids   = $product->get_gallery_image_ids();
				$image_ids[] = $product->get_image_id();
				$images      = array();
				foreach ( $image_ids as $image_id ) {
					$images[] = wp_get_attachment_url( $image_id );
				}

				$categories    = get_the_terms( $product->get_id(), 'product_cat' );
				$categoryNames = array();
				foreach ( $categories as $category ) {
					$categoryNames[] = $category->name;
				}
				$brands = $this->getProductBrands( $product->get_id() );

				$formattedProduct = array(
					'id'             => $product->get_id(),
					'title'          => $product->get_name(),
					'description'    => $product->get_description(),
					'price'          => ( $product->get_regular_price() ? $product->get_regular_price() : $product->get_price() ) . ' ' . get_woocommerce_currency(),
					'sale_price'     => $product->get_sale_price() . ' ' . get_woocommerce_currency(),
					'sku'            => $product->get_sku(),
					'availability'   => strpos( $product->get_stock_status(), 'out' ) === false ? 'out of stock' : 'in stock',
					'images'         => $images,
					'category_ids'   => $product->get_category_ids(),
					'category_names' => $categoryNames,
					'link'           => get_permalink( $product->get_id() ),
				);

				if ( ! empty( $brands['names'] ) ) {
					$formattedProduct['brand']    = $brands['names'][0];
					$formattedProduct['brand_id'] = $brands['ids'][0];
				}

				file_put_contents( $file, json_encode( $formattedProduct ) . "\n", FILE_APPEND );
			}
			return $url;
		}

		private function getProductBrands( $productId ) {
			$taxonomies = array(
				'product_brand',
				'yith_product_brand',
				'pa_brand',
			);
			$output     = array(
				'ids'   => array(),
				'names' => array(),
			);

			foreach ( $taxonomies as $taxonomy ) {
				$brands = wp_get_post_terms( $productId, $taxonomy, array( 'fields' => 'all' ) );
				if ( ! empty( $brands ) ) {
					foreach ( $brands as $brand ) {
						if ( empty( $brand->term_id ) || empty( $brand->name ) ) {
							continue;
						}
						$output['ids'][]   = $brand->term_id;
						$output['names'][] = $brand->name;
					}
					break;
				}
			}
			return $output;
		}
	}
}