<?php

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

if ( ! class_exists( 'CR_Email_Func' ) ) :

	/**
	* Reminder email for product reviews
	*/
	class CR_Email_Func {

		const TEMPLATE_REVIEW_REMINDER = 'email-review-reminder.php';
		const TEMPLATE_REVIEW_DISCOUNT = 'email-review-discount.php';
		const CR_MESSAGE_ID = 'X-CR-Message-ID';

		public static function get_order_items2( $order, $currency ) {
			// read options
			$enabled_for = get_option( 'ivole_enable_for', 'all' );
			$enabled_categories = get_option( 'ivole_enabled_categories', array() );
			$categories_mapping = get_option( 'ivole_product_feed_categories', array() );
			$identifiers = get_option( 'ivole_product_feed_identifiers', array(
				'pid'   => '',
				'gtin'  => '',
				'mpn'   => '',
				'brand' => ''
			) );
			$static_brand = trim( get_option( 'ivole_google_brand_static', '' ) );
			// get order items
			$items_return = array();
			if ( $order ) {
				$items = $order->get_items();
				// check if taxes should be included in line items prices
				$tax_display = get_option( 'woocommerce_tax_display_cart' );
				$inc_tax = false;
				if ( 'excl' == $tax_display ) {
					$inc_tax = false;
				} else {
					$inc_tax = true;
				}
				$mailer = get_option( 'ivole_mailer_review_reminder', 'cr' );

				foreach ( $items as $item_id => $item ) {
					// a filter to optionally exclude some items from being added to a review form
					if ( apply_filters( 'cr_exclude_order_item', false, $order, $item ) ) {
						continue;
					}

					$categories = get_the_terms( $item['product_id'], 'product_cat' );
					// check if an item needs to be skipped because none of categories it belongs to has been enabled for reminders
					if( $enabled_for === 'categories' ) {
						$skip = true;
						if ( $categories && is_array( $categories ) ) {
							foreach ( $categories as $category_id => $category ) {
								if( in_array( $category->term_id, $enabled_categories ) ) {
									$skip = false;
									break;
								}
							}
						}
						if( $skip ) {
							continue;
						}
					}
					if ( apply_filters( 'woocommerce_order_item_visible', true, $item ) && $item['product_id'] ) {
						// create WC_Product to use its function for getting name of the product
						$prod_main_temp = wc_get_product( $item['product_id'] );
						if( $item['variation_id'] ) {
							$prod_temp = new WC_Product_Variation( $item['variation_id'] );
						} else {
							$prod_temp = new WC_Product( $item['product_id'] );
						}
						$image = wp_get_attachment_image_url( $prod_main_temp->get_image_id(), 'full', false );
						if ( ! $image ) {
							$image = '';
						}
						$q_name = $prod_main_temp->get_title();
						$price_per_item = floatval( wc_get_price_to_display( $prod_temp ) );

						// qTranslate integration
						if ( function_exists( 'qtranxf_useCurrentLanguageIfNotFoundUseDefaultLanguage' ) ) {
							$q_name = qtranxf_useCurrentLanguageIfNotFoundUseDefaultLanguage( $q_name );
						}

						// WPML integration
						if ( has_filter( 'translate_object_id' ) && ! function_exists( 'pll_get_post' ) ) {
							$wpml_current_language = $order->get_meta( 'wpml_language', true );
							$translated_product_id = apply_filters( 'translate_object_id', $item['product_id'], 'product', true, $wpml_current_language );
							$q_name = get_the_title( $translated_product_id );
							// WPML Multi-currency
							if ( $currency ) {
								$price_per_item_changed = false;
								if( get_post_meta( $item['product_id'], '_wcml_custom_prices_status', true ) ) {
									$price_per_item_currency = get_post_meta( $item['product_id'], '_price_' . strtoupper( $currency ), true );
									if( $price_per_item_currency ) {
										$price_per_item = floatval( $price_per_item_currency );
										$price_per_item_changed = true;
									}
								} else {
									if( has_filter( 'wcml_raw_price_amount' ) ) {
										$price_per_item = apply_filters( 'wcml_raw_price_amount', floatval( $prod_temp->get_price() ), $currency );
										$price_per_item_changed = true;
									}
								}
								if( $price_per_item_changed ) {
									if( $inc_tax ) {
										$price_per_item = floatval( wc_get_price_including_tax( $prod_temp, array( 'qty' => 1, 'price' => $price_per_item ) ) );
									} else {
										$price_per_item = floatval( wc_get_price_excluding_tax( $prod_temp, array( 'qty' => 1, 'price' => $price_per_item ) ) );
									}
								}
							}
						}

						// Polylang integration
						if ( function_exists( 'pll_get_post' ) && function_exists( 'pll_default_language' ) ) {
							$polylang_default_language = pll_default_language();
							$default_product_id = pll_get_post( $item['product_id'], $polylang_default_language );
							if( $default_product_id ) {
								$item['product_id'] = $default_product_id;
							}
						}

						$q_name = strip_tags( $q_name );

						// check if name of the product is empty (this could happen if a product was deleted)
						if( strlen( $q_name ) === 0 ) {
							continue;
						}

						// a proactive check if the product belongs to prohibited categories
						if ( 'cr' === $mailer ) {
							$stop_words = array( 'kratom', 'cbd', 'cannabis', 'marijuana', 'kush' );
							if ( function_exists( 'mb_strtolower' ) ) {
								$name_lowercase = mb_strtolower( $q_name );
							} else {
								$name_lowercase = strtolower( $q_name );
							}
							$stop_word_found = false;
							foreach ( $stop_words as $word ) {
								if ( false !== strpos( $name_lowercase, $word ) ) {
									$stop_word_found = true;
									break;
								}
							}
							if ( $stop_word_found ) {
								$order->add_order_note(
									sprintf(
										__( 'CR: %1$s cannot be included in a review invitation because it is related to one of the prohibited categories of products. If you would like to send review invitations for this product, please set the \'Verified Reviews\' option to \'Self-hosted\' in the <a href="%2$s">settings</a>.', 'customer-reviews-woocommerce' ),
										'\'' . $q_name . '\'',
										admin_url( 'admin.php?page=cr-reviews-settings&tab=review_reminder' )
									)
								);
								continue;
							}
						}

						// check if we have several variations of the same product in our order
						// review requests should be sent only once per each product
						$same_product_exists = false;
						for($i = 0; $i < sizeof( $items_return ); $i++ ) {
							if( isset( $items_return[$i]['id'] ) && $item['product_id'] === $items_return[$i]['id'] ) {
								$same_product_exists = true;
								$items_return[$i]['price'] += $order->get_line_total( $item, $inc_tax );
							}
						}
						if( !$same_product_exists ) {
							$tags = array();
							$cats = array();
							$idens = array();
							// save native WooCommerce categories associated with the product as tags
							// save mapping of native WooCommerce categories to Google taxonomy as categories
							if ( $categories && is_array( $categories ) ) {
								foreach ($categories as $category) {
									$tags[] = $category->name;
									if( isset( $categories_mapping[$category->term_id] ) && $categories_mapping[$category->term_id] > 0 ) {
										$cats[] = $categories_mapping[$category->term_id];
									}
								}
							}
							$tags = array_values( array_unique( $tags ) );
							$cats = array_values( array_unique( $cats ) );
							// read product identifiers (gtin, mpn, brand)
							if( is_array( $identifiers ) ) {
								if( isset( $identifiers['gtin'] ) ) {
									$idens['gtin'] = CR_Google_Shopping_Prod_Feed::get_field( $identifiers['gtin'], $prod_main_temp );
								}
								if( isset( $identifiers['mpn'] ) ) {
									$idens['mpn'] = CR_Google_Shopping_Prod_Feed::get_field( $identifiers['mpn'], $prod_main_temp );
								}
								if( isset( $identifiers['brand'] ) ) {
									$idens['brand'] = CR_Google_Shopping_Prod_Feed::get_field( $identifiers['brand'], $prod_main_temp );
									if( !$idens['brand'] ) {
										$idens['brand'] = strval( $static_brand );
									}
								}
							}
							$items_return[] = array( 'id' => $item['product_id'], 'name' => $q_name, 'price' => $order->get_line_total( $item, $inc_tax ),
							'pricePerItem' => $price_per_item, 'image' => $image, 'tags' => $tags, 'categories' => $cats, 'identifiers' => $idens );
						}
					}
				}
				// check if free products should be excluded
				if( 'yes' == get_option( 'ivole_exclude_free_products', 'no' ) ) {
					$items_return_excl_free = array();
					foreach ($items_return as $item_return) {
						if( $item_return['price'] > 0 ) {
							$items_return_excl_free[] = $item_return;
						}
					}
					return $items_return_excl_free;
				}
			}
			return $items_return;
		}

		// replacement of the standard WooCommerce wc_price function
		// it is necessary to prevent WooCommerce Multilingual plugin from adding its filters and crashing
		public static function cr_price( $price, $args = array() ) {
			$args = wp_parse_args(
				$args,
				array(
					'ex_tax_label'       => false,
					'currency'           => '',
					'decimal_separator'  => wc_get_price_decimal_separator(),
					'thousand_separator' => wc_get_price_thousand_separator(),
					'decimals'           => wc_get_price_decimals(),
					'price_format'       => get_woocommerce_price_format(),
				)
			);

			$unformatted_price = $price;
			$negative          = $price < 0;
			$price             = floatval( $negative ? $price * -1 : $price );
			$price             = number_format( $price, $args['decimals'], $args['decimal_separator'], $args['thousand_separator'] );

			if ( apply_filters( 'woocommerce_price_trim_zeros', false ) && $args['decimals'] > 0 ) {
				$price = wc_trim_zeros( $price );
			}

			$formatted_price = ( $negative ? '-' : '' ) . sprintf( $args['price_format'], '<span class="cr-Price-currencySymbol">' . get_woocommerce_currency_symbol( $args['currency'] ) . '</span>', $price );
			$return          = '<span class="cr-Price-amount amount"><bdi>' . $formatted_price . '</bdi></span>';

			/**
			 * Filters the string of price markup.
			 *
			 * @param string $return            Price HTML markup.
			 * @param string $price             Formatted price.
			 * @param array  $args              Pass on the args.
			 * @param float  $unformatted_price Price as float to allow plugins custom formatting. Since 3.2.0.
			 */
			return apply_filters( 'cr_price', $return, $price, $args, $unformatted_price );
		}

		public static function cr_map_language( $language ) {
			$language = strtoupper( $language );
			switch( $language ) {
				case 'PT-PT':
					$language = 'PT';
					break;
				case 'PT-BR':
					$language = 'BR';
					break;
				default:
					break;
			}
			$lang_explode = explode( '-', $language );
			if( is_array( $lang_explode ) && 1 < count( $lang_explode ) ) {
				$language = $lang_explode[0];
			} else {
				$lang_explode = explode( '_', $language );
				if( is_array( $lang_explode ) && 1 < count( $lang_explode ) ) {
					$language = $lang_explode[0];
				}
			}
			return $language;
		}

		public static function get_local_email_template( $data, $is_test, $is_verified ) {
			if ( $is_verified ) {
				$ext_id = '';
				// remove unnecessary data from the request
				$lean_data = $data;
				unset( $lean_data['email'] );
				unset( $lean_data['customer'] );
				unset( $lean_data['colors']['email'] );
				unset( $lean_data['templateId'] );
				unset( $lean_data['verification'] );
				//
				if ( ! $is_test ) {
					unset( $lean_data['trackOpens'] );
					unset( $lean_data['schedule'] );
					$api_url = 'https://api.cusrev.com/v2/review-form';
				} else {
					unset( $lean_data['order']['items'] );
					$api_url = 'https://api.cusrev.com/v2/test-form';
				}
				// get a CusRev form
				$data_string = json_encode( $lean_data );
				$ch = curl_init();
				curl_setopt( $ch, CURLOPT_URL, $api_url );
				curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
				curl_setopt( $ch, CURLOPT_CUSTOMREQUEST, "POST" );
				curl_setopt( $ch, CURLOPT_POSTFIELDS, $data_string );
				curl_setopt( $ch, CURLOPT_CONNECTTIMEOUT, 10 );
				curl_setopt( $ch, CURLOPT_TIMEOUT, 30 );
				curl_setopt( $ch, CURLOPT_HTTPHEADER, array(
					'Content-Type: application/json',
					'Content-Length: ' . strlen( $data_string ) )
				);
				$result = curl_exec( $ch );
				// check response
				if ( false === $result ) {
					return array(
						'code' => 1,
						'template' => 'cURL error',
						'form_link' => '',
						'email_id' => $ext_id
					);
				} else {
					$cr_email_form_link = '';
					$result = json_decode( $result, true );
					if ( ! $is_test ) {
						// an actual order
						if (
							isset( $result['status'] ) &&
							isset( $result['url'] ) &&
							isset( $result['extId'] ) &&
							'OK' === $result['status'] &&
							$result['url'] &&
							$result['extId']
						) {
							$cr_email_form_link = esc_url( $result['url'] );
							$ext_id = sanitize_file_name( $result['extId'] );
						} else {
							return array(
								'code' => 1,
								'template' => isset( $result['details'] ) ? esc_html( $result['details'] ) : 'Error in response format',
								'form_link' => '',
								'email_id' => $ext_id
							);
						}
					} else {
						// a test
						if (
							isset( $result['status'] ) &&
							isset( $result['url'] ) &&
							'OK' === $result['status'] &&
							$result['url']
						) {
							$cr_email_form_link = esc_url( $result['url'] );
						} else {
							return array(
								'code' => 1,
								'template' => isset( $result['details'] ) ? esc_html( $result['details'] ) : 'Error in response format',
								'form_link' => '',
								'email_id' => $ext_id
							);
						}
					}
				}
			} else {
				// create an external email id
				$ext_id = self::create_email_ext_id();
				// create a local form
				$form = self::create_local_form( $data, $is_test );
				$cr_email_form_link = '';
				if( 0 === $form['code'] ) {
					$cr_email_form_link = esc_url( $form['text'] . '?r=' . $ext_id );
				} else {
					return array(
						'code' => 1,
						'template' => $form['text'],
						'form_link' => '',
						'email_id' => $ext_id
					);
				}
			}
			// fetch a local email template
			$template = wc_locate_template(
				apply_filters(
					'cr_settings_email_file_name',
					self::TEMPLATE_REVIEW_REMINDER,
					$data['templateId']
				),
				'customer-reviews-woocommerce',
				apply_filters(
					'cr_settings_email_template_base',
					__DIR__ . '/../../templates/',
					$data['templateId']
				)
			);
			$email_template = '';
			ob_start();
			$cr_email_heading = $data['email']['header'];
			$cr_email_body = $data['email']['body'];
			$cr_email_review_btn = $data['email']['reviewBtn'];
			$cr_email_footer = $data['email']['footer'];
			$cr_email_color_bg = $data['colors']['email']['bg'];
			$cr_email_color_text = $data['colors']['email']['text'];
			// optional tracking pixel
			$cr_email_pixel = '';
			if ( isset( $data['trackOpens'] ) && $data['trackOpens'] ) {
				$pixel_src = esc_url( get_home_url() . '/' . CR_Local_Forms::PIXEL_SLUG . '/' . $ext_id . '.png' );
				$cr_email_pixel = sprintf( CR_Local_Forms::PIXEL_DIV, $pixel_src );
			}
			include( $template );
			$email_template = ob_get_clean();
			return array(
				'code' => 0,
				'template' => $email_template,
				'form_link' => $cr_email_form_link,
				'email_id' => $ext_id
			);
		}

		public static function get_local_email_template_coupon( $data, $is_test ) {
			// fetch a local email template
			$template = wc_locate_template(
				self::TEMPLATE_REVIEW_DISCOUNT,
				'customer-reviews-woocommerce',
				__DIR__ . '/../../templates/'
			);
			$email_template = '';
			ob_start();
			$cr_email_heading = $data['email']['header'];
			$cr_email_body = $data['email']['body'];
			$cr_email_footer = $data['email']['footer'];
			$cr_email_color_bg = get_option( 'ivole_email_coupon_color_bg', '#0f9d58' );
			$cr_email_color_text = get_option( 'ivole_email_coupon_color_text', '#ffffff' );
			include( $template );
			$email_template = ob_get_clean();
			return $email_template;
		}

		private static function create_local_form( $data, $is_test ) {
			return CR_Local_Forms::save_form(
				$data['order']['id'],
				array(
					'firstname' => $data['customer']['firstname'],
					'lastname' => $data['customer']['lastname'],
					'email' => $data['email']['to'],
				),
				$data['form']['header'],
				$data['form']['description'],
				$data['order']['items'],
				$is_test,
				$data['language'],
				null
			);
		}

		public static function send_email( $data, $is_test, $data_extra ) {
			$mailer = get_option( 'ivole_mailer_review_reminder', 'cr' );
			if( 'wp' === $mailer ) {
				// WP mailer
				$is_verified = ( 'yes' === get_option( 'ivole_verified_reviews', 'no' ) ) ? true : false;
				if ( $is_verified ) {
					$data['verification'] = 'verified';
				} else {
					$data['verification'] = 'local';
				}
				$headers = ['Content-Type: text/html; charset=UTF-8'];
				if ( filter_var( $data['email']['from'], FILTER_VALIDATE_EMAIL ) ) {
					$headers[] = 'From: ' . $data['email']['fromText'] . ' <' . $data['email']['from'] . '>';
				}
				if ( filter_var( $data['email']['replyTo'], FILTER_VALIDATE_EMAIL ) ) {
					$headers[] = 'Reply-To: ' . $data['email']['replyTo'];
				}
				// need to enhance $data with a review button translation that is available only for the self-hosted mode
				$data['email']['reviewBtn'] = $data_extra['reviewBtn'];
				//
				$message = self::get_local_email_template( $data, $is_test, $is_verified );
				if( 0 === $message['code'] ) {
					$message['template'] = apply_filters(
						'cr_local_review_reminder_template',
						$message['template'],
						array(
							'review_form' => $message['form_link'],
							'language' => $data['language'],
							'email' => $data['email']['to'],
							'firstname' => $data['customer']['firstname'],
							'lastname' => $data['customer']['lastname'],
							'order_id' => $data['order']['id'],
							'order_date' => $data['order']['date'],
							'items' => $data['order']['items'],
							'currency' => $data['order']['currency'],
							'email_id' =>  $message['email_id'],
							'is_test' => $is_test,
							'template_id' => $data['templateId']
						)
					);
					$headers[] = self::CR_MESSAGE_ID . ': ' . $message['email_id'];
					$data['email']['subject'] = apply_filters(
						'cr_local_review_reminder_subject',
						$data['email']['subject'],
						array(
							'language' => $data['language'],
							'firstname' => $data['customer']['firstname'],
							'lastname' => $data['customer']['lastname'],
							'order_id' => $data['order']['id'],
							'template_id' => $data['templateId']
						)
					);
					$wpmail_result = wp_mail( $data['email']['to'], $data['email']['subject'], $message['template'], $headers );
					if ( $wpmail_result ) {
						$result = array(
							'status' => 'OK',
							'details' => ''
						);
					} else {
						$details = 'wp_mail function returned an error';
						$wpmail_error = CR_WPMail_Log::get_error( $message['email_id'] );
						if ( $wpmail_error ) {
							$details = esc_html( $details . ' [' . $wpmail_error .']' );
						}
						$result = array(
							'status' => 'Error',
							'details' => $details
						);
					}
				} else {
					$result = array(
						'status' => 'Error',
						'details' => $message['template']
					);
				}
				$result['message'] = $message;
				$result['email_id'] = $message['email_id'];
			} else {
				// CusRev mailer
				$api_url = 'https://api.cusrev.com/v2/review-reminder';
				if ( $is_test ) {
					unset( $data['order']['items'] );
					$api_url = 'https://api.cusrev.com/v2/test-email';
				}
				$data_string = json_encode( $data );
				$ch = curl_init();
				curl_setopt( $ch, CURLOPT_URL, $api_url );
				curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
				curl_setopt( $ch, CURLOPT_CUSTOMREQUEST, "POST" );
				curl_setopt( $ch, CURLOPT_POSTFIELDS, $data_string );
				curl_setopt( $ch, CURLOPT_HTTPHEADER, array(
					'Content-Type: application/json',
					'Content-Length: ' . strlen( $data_string ) )
				);
				$result = curl_exec( $ch );
				$data['verification'] = 'verified';
				if( false === $result ) {
					$result = array( 'status' => 'Error', 'details' => 'cURL error' );
				} else {
					$result = json_decode( $result, true );
				}
				$result['message'] = '';
				if ( isset( $result['extId'] ) && $result['extId'] ) {
					$result['email_id'] = $result['extId'];
				}
			}
			$result['data'] = $data;
			return $result;
		}

		public static function send_email_coupon( $data, $is_test ) {
			$mailer = get_option( 'ivole_mailer_review_reminder', 'cr' );
			// use WP mailer if it is configured in the settings or the coupon is for a review posted via an on-site review form and there is no order number
			if ( 'wp' === $mailer || ! $data['order']['id'] ) {
				$headers = ['Content-Type: text/html; charset=UTF-8'];
				if ( filter_var( $data['email']['from'], FILTER_VALIDATE_EMAIL ) ) {
					$headers[] = 'From: ' . $data['email']['fromText'] . ' <' . $data['email']['from'] . '>';
				}
				if ( filter_var( $data['email']['replyTo'], FILTER_VALIDATE_EMAIL ) ) {
					$headers[] = 'Reply-To: ' . $data['email']['replyTo'];
				}
				if( !$is_test && $data['email']['bcc'] ) {
					$headers[] = 'Bcc: ' . $data['email']['replyTo'];
				}
				$message = self::get_local_email_template_coupon( $data, $is_test );
				$message = apply_filters(
					'cr_local_review_discount_template',
					$message,
					array(
						'language' => $data['language'],
						'email' => $data['email']['to'],
						'firstname' => $data['customer']['firstname'],
						'lastname' => $data['customer']['lastname'],
						'order_id' => $data['order']['id'],
						'order_date' => $data['order']['date'],
						'items' => $data['order']['items'],
						'currency' => $data['order']['currency'],
						'discount_amount' => $data['discount']['amount'],
						'discount_code' => $data['discount']['code'],
						'is_test' => $is_test
					)
				);
				$data['email']['subject'] = apply_filters(
					'cr_local_review_discount_subject',
					$data['email']['subject'],
					array(
						'language' => $data['language'],
						'firstname' => $data['customer']['firstname'],
						'lastname' => $data['customer']['lastname'],
						'order_id' => $data['order']['id']
					)
				);
				$wpmail_result = wp_mail( $data['email']['to'], $data['email']['subject'], $message, $headers );
				$result = json_encode( array( 'status' => 'OK' ) );
			} else {
				$api_url = 'https://api.cusrev.com/v1/production/review-discount';
				if( $is_test ) {
					unset( $data['order']['items'] );
					$api_url = 'https://api.cusrev.com/v2/test-email';
				}
				$data_string = json_encode( $data );
				$ch = curl_init();
				curl_setopt( $ch, CURLOPT_URL, $api_url );
				curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
				curl_setopt( $ch, CURLOPT_CUSTOMREQUEST, "POST" );
				curl_setopt( $ch, CURLOPT_POSTFIELDS, $data_string );
				curl_setopt( $ch, CURLOPT_HTTPHEADER, array(
					'Content-Type: application/json',
					'Content-Length: ' . strlen( $data_string ) )
				);
				$result = curl_exec( $ch );
			}
			return $result;
		}

		public static function create_email_ext_id() {
			if ( function_exists( 'random_bytes' ) ) {
				$bytes = random_bytes( 8 );
				return strtolower( bin2hex( $bytes ) );
			} else {
				return strtolower( uniqid( 'eml' ) );
			}
		}

		public static function get_test_items() {
			return array( array( 'id' => 1,
					'name' => __( 'Item 1 Test', 'customer-reviews-woocommerce' ),
					'price' => 15,
					'image' => plugin_dir_url( dirname( dirname( __FILE__ ) ) ) . 'img/test-product-1.jpeg'
				),
				array( 'id' => 2,
					'name' => __( 'Item 2 Test', 'customer-reviews-woocommerce' ),
					'price' => 150,
					'image' => plugin_dir_url( dirname( dirname( __FILE__ ) ) ) . 'img/test-product-2.jpeg'
				)
			);
		}

	}

endif;
