<?php
/**
 * A class that generates the shortlinks
 *
 * Defines the api calls of the url-shortener used in the plugin
 *
 * @link       https://chykalophia.com/woocommerce-direct-links
 * @since      0.1.0
 *
 * @package    Woocommerce_Direct_Links
 * @subpackage Woocommerce_Direct_Links/admin/partials
 */

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

/**
 * Check if Cklph_Wdl_shortlinks exists.
 */
if ( ! class_exists( 'Cklph_Wdl_Shortlinks' ) ) {

	/**
	 * Class for shortlink API
	 */
	class Cklph_Wdl_Shortlinks {

		/**
		 * Converts a url into tinyurl link.
		 *
		 * @param int $item_id item_id of product.
		 * @return $response if error occur.
		 */
		protected function cklph_wdl_get_tinyurl( $item_id ) {
			$tinyurl_site = get_option( 'tinyurl_domain' );
			$domain       = empty( $tinyurl_site ) ? 'tiny.one' : $tinyurl_site;
			$access_token = get_option( 'tinyurl_access_token_options' );
			$get_url      = get_post_meta( $item_id, 'tinyurl_link', true );
			$home_url     = home_url( 'checkout/?add-to-cart=' . intval( $item_id ) . '&quantity=1' );

			// If user has API key run this function.
			if ( ! empty( $access_token ) ) {
				$headers = array(
					'Authorization' => 'Bearer ' . $access_token,
					'Content-Type'  => 'application/json',
				);

				$tinyurl_payload = array(
					'url'    => $home_url,
					'domain' => $domain,
				);

				$tinyurl_payload_encode = wp_json_encode( $tinyurl_payload );

				$tinyurl_request = wp_remote_post(
					'https://api.tinyurl.com/create',
					array(
						'method'  => 'POST',
						'headers' => $headers,
						'body'    => $tinyurl_payload_encode,
					)
				);

				$response_code  = wp_remote_retrieve_response_code( $tinyurl_request );
				$tinyurl_body   = wp_remote_retrieve_body( $tinyurl_request );
				$tinyurl_decode = json_decode( $tinyurl_body );

				if ( 200 === (int) $response_code ) {
					$tinyurl = $tinyurl_decode->data->tiny_url;
					if ( empty( $get_url ) || $tinyurl !== $get_url ) {
						update_post_meta( $item_id, 'tinyurl_link', $tinyurl );
						$response = array(
							'response_code' => $response_code,
							'message'       => 'OK',
						);
						return $response;
					}
					$response = array(
						'response_code' => $response_code,
						'message'       => 'Exists',
					);
					return $response;
				} elseif ( 400 === (int) $response_code ) {
					$response = array(
						'response_code' => $response_code,
						'message'       => 'Bad Request',
					);
					return $response;
				} elseif ( 403 === (int) $response_code ) {
					$response = array(
						'response_code' => $response_code,
						'message'       => 'FORBIDDEN',
					);
					return $response;
				} elseif ( 401 === (int) $response_code ) {
					update_option( 'tinyurl_access_token_options', '' );
					$response = array(
						'response_code' => $response_code,
						'message'       => $tinyurl_decode->errors[0],
					);
					return $response;
				} else {
					$response = array(
						'response_code' => $response_code,
						'message'       => $tinyurl_decode->errors[0],
					);
					return $response;
				}
			} else {
				$tinyurl_request = wp_remote_post( 'https://tinyurl.com/api-create.php?url=' . $home_url );
				$response_code   = wp_remote_retrieve_response_code( $tinyurl_request );
				$tinyurl         = wp_remote_retrieve_body( $tinyurl_request );

				if ( 200 === (int) $response_code ) {
					if ( empty( $get_url ) || $tinyurl !== $get_url ) {
						update_post_meta( $item_id, 'tinyurl_link', $tinyurl );
						$response = array(
							'response_code' => $response_code,
							'message'       => 'OK',
						);
						return $response;
					}
					$response = array(
						'response_code' => $response_code,
						'message'       => 'Exists',
					);
					return $response;
				} else {
					$response = array(
						'response_code' => $response_code,
						'message'       => $tinyurl,
					);
					return $response;
				}
			}
		}

		/**
		 * Validates tinyurl.
		 *
		 * @param int $item item_id of product.
		 * @return string
		 */
		public function cklph_wdl_check_tinyurl( $item ) {
			$tinyurl_domain = get_option( 'tinyurl_domain' );
			$access_token   = get_option( 'tinyurl_access_token_options' );

			if ( ! empty( $tinyurl_domain ) && empty( $access_token ) ) {
				return '401-tinyurl';
			}

			$tinyurl_response      = $this->cklph_wdl_get_tinyurl( $item );
			$tinyurl_response_code = $tinyurl_response['response_code'];
			$tinyurl_response_body = $tinyurl_response['message'];

			if ( 422 === (int) $tinyurl_response_code ) {
				return '422-tinyurl';
			}

			switch ( $tinyurl_response_body ) {
				case 'OK':
					return 201;
				case 'Exists':
					return 200;
				default:
					$i18n_code = empty( $tinyurl_response_code ) ? '0' : $tinyurl_response_code;
					$i18n_body = empty( $tinyurl_response_body ) ? 'Unknown Error.' : $tinyurl_response_body;

					/*
						* Translators: %1$d: tinyurl response code.
						* Translators: %2$s: tinyurl error message.
						*/
					return sprintf( __( 'An Error has occured. Error code: %1$d : %2$s', 'woocommerce-direct-links' ), intval( $i18n_code ), esc_attr( $i18n_body ) );
			}
		}

		/**
		 * Returns the headers based from the parameters
		 *
		 * @param string $host The host API.
		 * @param string $access_token The authorization token from the API.
		 * @param string $content_type Specifiy the media tpye of the resource.
		 * @return array
		 */
		protected function cklph_wdl_get_api_headers( $host, $access_token, $content_type ) {
			return array(
				'Host'          => $host,
				'Authorization' => 'Bearer ' . $access_token,
				'Content-Type'  => $content_type,
			);
		}

		/**
		 * Http request GET the group_guid for bitly url.
		 *
		 * @return @group_guid | @guid_response
		 */
		protected function cklph_wdl_group_guid() {
			$access_token = get_option( 'bitly_access_token_options' );
			$headers      = $this->cklph_wdl_get_api_headers( 'api-ssl.bitly.com', $access_token, 'application/json' );

			$guid_request = wp_remote_get(
				'https://api-ssl.bitly.com/v4/groups',
				array(
					'timeout' => 0,
					'headers' => $headers,
				)
			);

			$guid_response_code = wp_remote_retrieve_response_code( $guid_request );
			$guid_body          = wp_remote_retrieve_body( $guid_request );
			$guid_json          = json_decode( $guid_body );

			if ( 200 !== (int) $guid_response_code ) {
				$guid_response = array(
					'response_code' => $guid_response_code,
					'message'       => $guid_json->message,
				);
				return $guid_response;
			}

			$guid_response = array(
				'response_code' => $guid_response_code,
				'message'       => $guid_json->groups[0]->guid,
			);
			return $guid_response;
		}

		/**
		 * Converts a url into a bitly link
		 *
		 * @param int $item_id  item_id_id of product.
		 * @return @response  return the error response and message if error occured.
		 */
		protected function cklph_wdl_get_bitly( $item_id ) {
			$access_token = get_option( 'bitly_access_token_options' );
			$headers      = $this->cklph_wdl_get_api_headers( 'api-ssl.bitly.com', $access_token, 'application/json' );
			$long_url     = home_url( 'checkout/?add-to-cart=' . intval( $item_id ) . '&quantity=1' );

			$bitly_payload = array(
				'long_url'   => $long_url,
				'group_guid' => $this->cklph_wdl_group_guid()['message'],
			);

			$bitly_payload_encode = wp_json_encode( $bitly_payload );

			$bitly_request = wp_remote_post(
				'https://api-ssl.bitly.com/v4/shorten',
				array(
					'method'  => 'POST',
					'headers' => $headers,
					'body'    => $bitly_payload_encode,
				)
			);

			$response_code = wp_remote_retrieve_response_code( $bitly_request );
			$bitly_body    = wp_remote_retrieve_body( $bitly_request );
			$bitly_decode  = json_decode( $bitly_body );

			if ( 201 < (int) $response_code ) {
				$response = array(
					'response_code' => $response_code,
					'message'       => $bitly_decode->message,
				);
				return $response;
			}

			if ( 200 === (int) $response_code || 201 === (int) $response_code ) {
				$get_url = get_post_meta( $item_id, 'bitly_link', true );
				if ( empty( $get_url ) || $get_url !== $bitly_decode->link ) {
					update_post_meta( $item_id, 'bitly_link', $bitly_decode->link );
					$response = array(
						'response_code' => $response_code,
						'message'       => 'OK',
					);
					return $response;
				}
				$response = array(
					'response_code' => $response_code,
					'message'       => 'Exists',
				);
				return $response;
			}
		}

		/**
		 * Validates the bitly API Key.
		 *
		 * @param int $item item_id of product.
		 * @return string
		 */
		public function cklph_wdl_check_bitly( $item ) {
			$access_token = get_option( 'bitly_access_token_options' );

			if ( empty( $access_token ) ) {
				return '401-bitly';
			}

			$group_guid_response = $this->cklph_wdl_group_guid();
			$guid_response_code  = $group_guid_response['response_code'];
			$guid_response_body  = $group_guid_response['message'];

			if ( 200 !== (int) $guid_response_code ) {
				$i18n_code = empty( $guid_response_code ) ? '0' : $guid_response_code;
				$i18n_body = empty( $guid_response_body ) ? 'Unknown error.' : $guid_response_body;

				/*
				 * Translators: %1$d: bitly response code.
				 * Translators: %2$s: bitly error message.
				 */
				return sprintf( __( 'An Error has occured while validating API key for Bitly. Error code: %1$d : %2$s', 'woocommerce-direct-links' ), intval( $i18n_code ), esc_attr( $i18n_body ) );
			}

			$bitly_response      = $this->cklph_wdl_get_bitly( $item );
			$bitly_response_code = $bitly_response['response_code'];
			$bitly_response_body = $bitly_response['message'];

			switch ( $bitly_response_body ) {
				case 'OK':
					return 201;
				case 'Exists':
					return 200;
				default:
					$i18n_code = empty( $bitly_response_code ) ? '0' : $bitly_response_code;
					$i18n_body = empty( $bitly_response_body ) ? 'Unknown Error.' : $bitly_response_body;

					/*
					* Translators: %1$d: bitly response code.
					* Translators: %2$s: bitly error message.
					*/
					return sprintf( __( 'An Error has occured while validating API key for Bitly. Error code: %1$d : %2$s', 'woocommerce-direct-links' ), intval( $i18n_code ), esc_attr( $i18n_body ) );
			}
		}

		/**
		 * Converts a url into joturl.
		 *
		 * @param int $item_id item_id of product.
		 * @return $response if error occur.
		 */
		protected function cklph_wdl_get_joturl( $item_id ) {
			$get_url = get_post_meta( $item_id, 'joturl_link', true );

			if ( empty( $get_url ) ) {
				$joturl_private = get_option( 'joturl_private' );
				$joturl_public  = get_option( 'joturl_public' );
				$home_url       = home_url( 'checkout/?add-to-cart=' . intval( $item_id ) . '&quantity=1' );
				$joturl_request = wp_remote_post( 'https://api.joturl.com/a/v1/shorten?login=' . $joturl_public . '&key=' . $joturl_private . '&url=' . $home_url . '' );
				$response_code  = wp_remote_retrieve_response_code( $joturl_request );
				$joturl_body    = wp_remote_retrieve_body( $joturl_request );
				$joturl_decode  = json_decode( $joturl_body );

				if ( 200 === (int) $response_code ) {
					$joturl = $joturl_decode->result->short_url;
					update_post_meta( $item_id, 'joturl_link', $joturl );
					$response = array(
						'response_code' => $response_code,
						'message'       => 'OK',
					);
					return $response;
				} else {
					$response = array(
						'response_code' => $response_code,
						'message'       => $joturl_decode->status->text,
					);
					return $response;
				}
			}

			$response = array(
				'response_code' => 409,
				'message'       => 'Exists',
			);
			return $response;
		}

		/**
		 * Validates the JotURL API Keys.
		 *
		 * @param int $item_id item_id of product.
		 * @return string
		 */
		public function cklph_wdl_check_joturl( $item_id ) {
			$joturl_private_key = get_option( 'joturl_private' );
			$joturl_public_key  = get_option( 'joturl_public' );

			if ( empty( $joturl_private_key ) || empty( $joturl_public_key ) ) {
				return '401-joturl';
			}

			$joturl_response      = $this->cklph_wdl_get_joturl( $item_id );
			$joturl_response_code = $joturl_response['response_code'];
			$joturl_response_body = $joturl_response['message'];

			switch ( $joturl_response_body ) {
				case 'OK':
					return 201;
				case 'Exists':
					return 200;
				default:
					$i18n_code = empty( $joturl_response_code ) ? '0' : $joturl_response_code;
					$i18n_body = empty( $joturl_response_body ) ? 'Unknown Error.' : $joturl_response_body;

					/*
					* Translators: %1$d: joturl response code.
					* Translators: %2$s: joturl error message.
					*/
					return sprintf( __( 'An Error has occured while validating API keys for JotURL. Error code: %1$d : %2$s', 'woocommerce-direct-links' ), intval( $i18n_code ), esc_attr( $i18n_body ) );
			}
		}

		/**
		 * Force convert a url into joturl.
		 *
		 * @param int $item_id item_id of product.
		 * @return $response if error occur.
		 */
		protected function cklph_wdl_force_get_joturl( $item_id ) {
			$joturl_private = get_option( 'joturl_private' );
			$joturl_public  = get_option( 'joturl_public' );
			$home_url       = home_url( 'checkout/?add-to-cart=' . intval( $item_id ) . '&quantity=1' );
			$joturl_request = wp_remote_post( 'https://api.joturl.com/a/v1/shorten?login=' . $joturl_public . '&key=' . $joturl_private . '&url=' . $home_url . '' );
			$response_code  = wp_remote_retrieve_response_code( $joturl_request );
			$joturl_body    = wp_remote_retrieve_body( $joturl_request );
			$joturl_decode  = json_decode( $joturl_body );

			if ( 200 === (int) $response_code ) {
				$joturl = $joturl_decode->result->short_url;
				update_post_meta( $item_id, 'joturl_link', $joturl );
				$response = array(
					'response_code' => $response_code,
					'message'       => 'OK',
				);
				return $response;
			} else {
				$response = array(
					'response_code' => $response_code,
					'message'       => $joturl_decode->status->text,
				);
				return $response;
			}
		}

		/**
		 * Validates the JotURL API Keys when JotURL is forced to refresh link.
		 *
		 * @param int $item_id item_id of product.
		 * @return string
		 */
		public function cklph_wdl_check_force_joturl( $item_id ) {
			$joturl_private_key = get_option( 'joturl_private' );
			$joturl_public_key  = get_option( 'joturl_public' );

			if ( empty( $joturl_private_key ) || empty( $joturl_public_key ) ) {
				return '401-joturl';
			}

			$joturl_response      = $this->cklph_wdl_force_get_joturl( $item_id );
			$joturl_response_code = $joturl_response['response_code'];
			$joturl_response_body = $joturl_response['message'];

			switch ( $joturl_response_body ) {
				case 'OK':
					return 201;
				case 'Exists':
					return 200;
				default:
					$i18n_code = empty( $joturl_response_code ) ? '0' : $joturl_response_code;
					$i18n_body = empty( $joturl_response_body ) ? 'Unknown Error.' : $joturl_response_body;

					/*
					* Translators: %1$d: joturl response code.
					* Translators: %2$s: joturl error message.
					*/
					return sprintf( __( 'An Error has occured while validating API keys for JotURL. Error code: %1$d : %2$s', 'woocommerce-direct-links' ), intval( $i18n_code ), esc_attr( $i18n_body ) );
			}
		}

		/**
		 * Converts checkout links to YoURLS.
		 *
		 * @param int $item_id id of product.
		 * @return @response if error occur.
		 */
		protected function cklph_wdl_get_yourls( $item_id ) {
			$get_url   = get_post_meta( $item_id, 'yourls_link', true );
			$home_url  = home_url( 'checkout/?add-to-cart=' . intval( $item_id ) . '&quantity=1' );
			$signature = get_option( 'yourls_signature' );
			$domain    = get_option( 'yourls_domain' );

			$yourls_request = wp_remote_post( 'http://' . $domain . '/yourls-api.php?format=json&action=shorturl&signature=' . $signature . '&url=' . $home_url . '' );
			$response_code  = wp_remote_retrieve_response_code( $yourls_request );
			$yourls_body    = wp_remote_retrieve_body( $yourls_request );
			$yourls_decode  = json_decode( $yourls_body );

			switch ( $response_code ) {
				case 200:
					if ( empty( $get_url ) || $yourls_decode->shorturl !== $get_url ) {
						update_post_meta( $item_id, 'yourls_link', $yourls_decode->shorturl );
						$response = array(
							'response_code' => $response_code,
							'message'       => 'OK',
						);
						return $response;
					}
					$response = array(
						'response_code' => $response_code,
						'message'       => 'Exists',
					);
					return $response;
				case 400:
					if ( empty( $get_url ) || $yourls_decode->shorturl !== $get_url ) {
						update_post_meta( $item_id, 'yourls_link', $yourls_decode->shorturl );
						$response = array(
							'response_code' => $response_code,
							'message'       => 'OK',
						);
						return $response;
					}
					$response = array(
						'response_code' => $response_code,
						'message'       => 'Exists',
					);
					return $response;
				case 0:
					$response = array(
						'response_code' => 404,
						'message'       => 'Site not found',
					);
					return $response;
				case 403:
					$response = array(
						'response_code' => 403,
						'message'       => 'Please use a valid YoURLS Signature',
					);
					return $response;
				default:
					$response = array(
						'response_code' => $response_code,
						'message'       => $yourls_decode->message,
					);
					return $response;
			}
		}

		/**
		 * Validates the YoURLS Signature.
		 *
		 * @param int $item item_id of product.
		 * @return string
		 */
		public function cklph_wdl_check_yourls( $item ) {

			$yourls_signature = get_option( 'yourls_signature' );
			$yourls_domain    = get_option( 'yourls_domain' );

			if ( empty( $yourls_signature ) || empty( $yourls_domain ) ) {
				return '401-yourls';
			}

			$yourls_response      = $this->cklph_wdl_get_yourls( $item );
			$yourls_response_code = $yourls_response['response_code'];
			$yourls_response_body = $yourls_response['message'];

			switch ( $yourls_response_body ) {
				case 'OK':
					return 201;
				case 'Exists':
					return 200;
				default:
					$i18n_code = empty( $yourls_response_code ) ? '0' : $yourls_response_code;
					$i18n_body = empty( $yourls_response_body ) ? 'Unknown Error.' : $yourls_response_body;

					/*
					* Translators: %1$d: YoURLS response code.
					* Translators: %2$s: YoURLS error message.
					*/
					return sprintf( __( 'An Error has occured while validating YoURLS credentials. Error code: %1$d : %2$s', 'woocommerce-direct-links' ), intval( $i18n_code ), esc_attr( $i18n_body ) );
			}
		}

		/**
		 * Get shortlink to use in list tables.
		 *
		 * @param int $item_id ID of product.
		 * @return @turl shortlink
		 */
		public function cklph_wdl_get_link( $item_id ) {
			$url_option = get_option( 'url_options' );
			$home_url   = esc_url( home_url( 'checkout/?add-to-cart=' . intval( $item_id ) . '&quantity=1' ) );

			switch ( $url_option ) {
				case 'tinyurl':
					$get_url = get_post_meta( $item_id, 'tinyurl_link', true );
					$url     = empty( $get_url ) ? $home_url : $get_url;
					break;
				case 'bitly':
					$get_url = get_post_meta( $item_id, 'bitly_link', true );
					$url     = empty( $get_url ) ? $home_url : $get_url;
					break;
				case 'yourls':
					$get_url = get_post_meta( $item_id, 'yourls_link', true );
					$url     = empty( $get_url ) ? $home_url : $get_url;
					break;
				case 'joturl':
					$get_url = get_post_meta( $item_id, 'joturl_link', true );
					$url     = empty( $get_url ) ? $home_url : $get_url;
					break;
				case 'none':
				default:
					$url = $home_url;
			}
			return $url;
		}
	}
}