<?php
/**
 * Handles logic for the templates library in admin settings.
 *
 * @package BB_PowerPack
 * @since 2.6.10
 */

/**
 * Exit if accessed directly.
 */
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * BB_PowerPack_Templates_Lib.
 */
final class BB_PowerPack_Templates_Lib {
	/**
	 * Holds the templates count.
	 *
	 * @since 2.6.0
	 * @var array $templates_count
	 */
	static public $templates_count = array();

	/**
	 * Holds templates data remote URLs.
	 *
	 * @since 2.6.0
	 * @var array $remote_urls
	 */
	static public $remote_urls = array();

	/**
	 * Holds FileSystem object
	 *
	 * @since 2.6.0
	 * @var object $filesystem
	 */
	static public $filesystem;

	/**
	 * Holds the upload dir path.
	 *
	 * @since 1.1.8
	 * @var array $upload_dir
	 */
	public static $upload_dir = null;

	/**
	 * Initialize the class.
	 *
	 * @since 2.6.0
	 * @return void
	 */
	static public function init() {
		self::$templates_count = array(
			'page'  => 0,
			'row'   => 0,
		);

		self::get_remote_urls();

		self::get_upload_dir();

		self::clear_enabled_templates();

		add_action( 'plugins_loaded', 					__CLASS__ . '::init_templates_data' );
		add_action( 'wp_ajax_pp_activate_template', 	__CLASS__ . '::activate_template' );
		add_action( 'wp_ajax_pp_deactivate_template', 	__CLASS__ . '::deactivate_template' );
	}

	/**
	 * Get WP Filesystem
	 *
	 * @since 2.6.0
	 * @return object
	 */
	static private function get_filesystem() {
		if ( class_exists( 'WP_Filesystem_Direct' ) && ! ( self::$filesystem instanceof WP_Filesystem_Direct ) ) {
			self::$filesystem = new WP_Filesystem_Direct( array() );
		} elseif ( ! class_exists( 'WP_Filesystem_Direct' ) ) {
			require_once ABSPATH . '/wp-admin/includes/class-wp-filesystem-base.php';
			require_once ABSPATH . '/wp-admin/includes/class-wp-filesystem-direct.php';

			self::$filesystem = new WP_Filesystem_Direct( array() );
		}

		return self::$filesystem;
	}

	static public function get_upload_dir() {
		if ( is_null( self::$upload_dir ) ) {
			self::$upload_dir = BB_PowerPack::$upload_dir;
		}

		return self::$upload_dir;
	}

	static public function get_remote_urls() {
		if ( empty( self::$remote_urls ) ) {
			self::$remote_urls = array(
				'page'	=> 'https://wpbeaveraddons.com/wp-json/powerpack/v2/get/templates/page/',
				'row'	=> 'https://wpbeaveraddons.com/wp-json/powerpack/v2/get/templates/row/',
			);
		}

		return self::$remote_urls;
	}

	/**
	 * Initialize the templates data.
	 *
	 * @since 2.6.0
	 * @return void
	 */
	static public function init_templates_data() {
		if ( is_admin() && isset( $_GET['page'] ) && 'ppbb-settings' == $_GET['page'] ) {
			self::download_templates_data();
			self::refresh_templates_data();
		} else {
			$row_templates 	= self::get_enabled_templates( 'row' );

			if ( is_array( $row_templates ) && method_exists( 'FLBuilder', 'register_templates' ) ) {
				$row_group = BB_PowerPack_Admin_Settings::get_option( 'ppwl_rt_label' );
				// translators: %s is for PowerPack or admin label or group name set in White Label settings.
				$row_group = ( ! $row_group || '' == trim( $row_group ) ) ? sprintf( __( '%s Row Templates', 'bb-powerpack' ), pp_get_admin_label() ) : $row_group;

				foreach ( $row_templates as $template ) {
					if ( file_exists( self::get_upload_dir()['path'] . $template . '.dat' ) ) {
						// Template filename should be the same as the category name.
						FLBuilder::register_templates( self::get_upload_dir()['path'] . $template . '.dat', array(
							'group'	=> $row_group,
						) );
					}
				}
			}

			$page_templates = self::get_enabled_templates( 'page' );

			if ( is_array( $page_templates ) && method_exists( 'FLBuilder', 'register_templates' ) ) {
				$page_group = BB_PowerPack_Admin_Settings::get_option( 'ppwl_tmpcat_label' );

				foreach ( $page_templates as $template ) {

					if ( file_exists( self::get_upload_dir()['path'] . $template . '.dat' ) ) {
						// Template filename should be the same as the category name.
						FLBuilder::register_templates( self::get_upload_dir()['path'] . $template . '.dat', array(
							'group'	=> $page_group,
						) );
					}
				}
			}
		} // End if().
	}

	/**
	 * If it is fresh plugin install or user had never access templates
	 * earlier then downloads the templates data once and set count.
	 *
	 * @since 2.6.0
	 * @param string $type	Template type either page or row.
	 * @return object
	 */
	static public function get_templates_data( $type ) {
		$upload_dir = self::get_upload_dir();
		$path = $upload_dir['path'];
		$file = $path . $type . '-templates.json';

		if ( ! file_exists( $file ) ) {
			self::download_templates_data();
		}

		$data = @file_get_contents( $file ); // @codingStandardsIgnoreLine

		if ( $data ) {
			$data = json_decode( $data, true );
			BB_PowerPack_Admin_Settings::$templates_count[ $type ] = count( $data );
		}

		return $data;
	}

	/**
	 * Refreshes the template data on reload reuest.
	 *
	 * @since 2.6.0
	 * @return void
	 */
	static public function refresh_templates_data() {
		if ( isset( $_GET['page'] ) && 'ppbb-settings' === $_GET['page'] ) {
			if ( isset( $_GET['refresh'] ) ) {
				self::download_templates_data( 'new' );
			} else {
				self::download_templates_data();
			}
		}
	}

	/**
	 * Downloads the template data.
	 *
	 * @since 2.6.0
	 * @param string $request	Either new or blank.
	 * @return void
	 */
	static public function download_templates_data( $request = '' ) {
		if ( 'new' != $request && file_exists( self::get_upload_dir()['path'] . 'page-templates.json' ) && file_exists( self::get_upload_dir()['path'] . 'row-templates.json' ) ) {
			return;
		}

		$upload_dir = self::get_upload_dir();

		$page 	= self::download_templates_json( self::get_remote_urls()['page'], $upload_dir['path'], 'page-templates.json' );
		$row 	= self::download_templates_json( self::get_remote_urls()['row'], $upload_dir['path'], 'row-templates.json' );

		return array(
			'page' => $page,
			'row' => $row
		);
	}

	/**
	 * Downloads templates JSON.
	 *
	 * @since 2.6.0
	 * @param string $url URL of template JSON file.
	 * @param string $path	Path of directory to store template JSON file.
	 * @param string $filename	Filename for the downloaded file.
	 * @return bool
	 */
	static private function download_templates_json( $url, $path, $filename = '' ) {
		// Initialize the flag.
		$downloaded = false;
		$output = array(
			'error'	=> false,
		);

		if ( empty( $filename ) ) {
			$output['error'] = __( 'Filename is not valid.', 'bb-powerpack' );
			return $output;
		}

		// Additional check for JSON filename.
		if ( 'page-templates.json' !== $filename ) {
			if ( 'row-templates.json' !== $filename ) {
				$output['error'] = __( 'Filename is not valid.', 'bb-powerpack' );
				return $output;
			}
		}

		$path = $path . $filename;

		// Delete the file if is already exists.
		if ( file_exists( $path ) ) {
			unlink( $path );
		}

		// Retrieve templates data.
		$response = wp_safe_remote_get( $url, array(
			'timeout' => 30,
		) );

		if ( is_wp_error( $response ) ) {
			pp_set_error( 'fetch_error' );
			$output['error'] = $response->get_error_message(); // @codingStandardsIgnoreLine
			@error_log( 'bb-powerpack: ' . $output['error'] );
			return $output;
		}

		$templates_json = wp_remote_retrieve_body( $response );
		$templates_data = json_decode( $templates_json, 1 );

		if ( is_array( $templates_data ) && count( $templates_data ) > 0 ) {

			// Check if there is proper response or something went unexpected.
			if ( array_key_exists( 'code', $templates_data ) || array_key_exists( 'message', $templates_data ) || array_key_exists( 'data', $templates_data ) ) {
				pp_set_error( 'fetch_error' );
				$output['error'] = __( 'Unable to fetch templates data.', 'bb-powerpack' );
				return $output;
			}

			file_put_contents( $path, $templates_json );
		} else {
			pp_set_error( 'fetch_error' );
			$output['error'] = __( 'Something went wrong. Please try again.', 'bb-powerpack' );
			return $output;
		}

		// Set the flag true if the template file is downloaded.
		if ( file_exists( $path ) ) {
			$output['error'] = false;
		}

		return $output;
	}

	/**
	 * Downloads template .dat file.
	 *
	 * @since 2.6.0
	 * @param string $url	URL of the template file.
	 * @param string $path	Directory path to store template file.
	 * @return bool
	 */
	static private function download_template( $url, $path ) {
		// get file name from URL.
		$file_name 	= basename( $url );

		// check file extension.
		if ( 'dat' !== strtolower( pathinfo( $file_name, PATHINFO_EXTENSION ) ) ) {
			// translators: %s is for template file name.
			$response['message'] = sprintf( __( 'Invalid template file: %s', 'bb-powerpack' ), $file_name );
			$response['success'] = false;

			return $response;
		}

		// download file to temp dir.
		$tmp_file 	= download_url( $url, 300, true );
		$path 		= $path . $file_name;
		$response 	= array(
			'message'	=> __( 'Template has downloaded successfully!', 'bb-powerpack' ),
			'success' 	=> true,
		);

		if ( ! is_wp_error( $tmp_file ) ) {
			// copy template file.
			if ( ! self::get_filesystem()->copy( $tmp_file, $path, true ) ) {
				$response['message'] = __( 'Could not find the template file.', 'bb-powerpack' );
				$response['success'] = false;
			}
		} else {
			$response['message'] = $tmp_file->get_error_message();
			$response['success'] = false;
			return $response;
		}

		// deletes the remote file from temp dir.
		unlink( $tmp_file );

		return $response;
	}

	/**
	 * AJAX - Activate the page template.
	 *
	 * @since 1.1.6
	 */
	static public function activate_template() {
		if ( ! isset( $_POST['nonce'] ) || ! wp_verify_nonce( sanitize_key( $_POST['nonce'] ), 'pp-activate-template' ) ) {
			return;
		}

		if ( ! isset( $_POST['pp_template_cat'] ) ) {
			return;
		}

		if ( ! isset( $_POST['pp_template_type'] ) ) {
			return;
		}

		if ( is_multisite() && preg_match( '#^' . network_admin_url() . '#i', $_SERVER['HTTP_REFERER'] ) ) {
			define( 'WP_NETWORK_ADMIN', true );
		}

		// Get the template category.
		$cat = sanitize_text_field( wp_unslash( $_POST['pp_template_cat'] ) );

		// Get the template type.
		$type = sanitize_text_field( wp_unslash( $_POST['pp_template_type'] ) );

		// Get the template URL.
		$url = pp_templates_src( $type, $cat );

		// Get the upload dir path.
		$path = self::get_upload_dir()['path'];

		// Downloads the template.
		$response = self::download_template( $url, $path );

		if ( ! $response['success'] ) {
			echo $response['message'];
			die();
		}

		$enabled_templates = self::get_enabled_templates( $type );

		if ( is_array( $enabled_templates ) ) {
			if ( in_array( 'disabled', $enabled_templates ) ) {
				$enabled_templates = array();
			}
			$enabled_templates[] = $cat;
		}

		if ( ! $enabled_templates || ! is_array( $enabled_templates ) ) {
			$enabled_templates = array( $cat );
		}

		$key = 'bb_powerpack_templates';

		if ( 'page' === $type ) {
			$key = 'bb_powerpack_page_templates';
		}

		BB_PowerPack_Admin_Settings::update_option( $key, $enabled_templates, false );

		if ( ! defined( 'WP_NETWORK_ADMIN' ) && is_multisite() ) {
			update_option( 'bb_powerpack_override_ms', 1 );
		}

		echo 'activated';
		die();
	}

	/**
	 * AJAX - Deactivate the page template.
	 *
	 * @since 1.1.6
	 */
	static public function deactivate_template() {
		if ( ! isset( $_POST['nonce'] ) || ! wp_verify_nonce( sanitize_key( $_POST['nonce'] ), 'pp-deactivate-template' ) ) {
			return;
		}

		if ( ! isset( $_POST['pp_template_cat'] ) ) {
			return;
		}

		if ( is_multisite() && preg_match( '#^' . network_admin_url() . '#i', $_SERVER['HTTP_REFERER'] ) ) {
			define( 'WP_NETWORK_ADMIN', true );
		}

		// Get the template category.
		$cat = sanitize_text_field( $_POST['pp_template_cat'] );

		// Get the template type.
		$type = sanitize_text_field( $_POST['pp_template_type'] );

		$enabled_templates = self::get_enabled_templates( $type );

		if ( is_array( $enabled_templates ) && in_array( $cat, $enabled_templates ) ) {
			$array_key = array_search( $cat, $enabled_templates );
			if ( false !== $array_key ) {
				unset( $enabled_templates[ $array_key ] );
			}
		}

		if ( count( $enabled_templates ) == 0 ) {
			$enabled_templates = array( 'disabled' );
		}

		$key = 'bb_powerpack_templates';

		if ( 'page' === $type ) {
			$key = 'bb_powerpack_page_templates';
		}

		BB_PowerPack_Admin_Settings::update_option( $key, $enabled_templates, false );

		if ( ! defined( 'WP_NETWORK_ADMIN' ) && is_multisite() ) {
			update_option( 'bb_powerpack_override_ms', 1 );
		}

		echo 'deactivated';
		die();
	}

	/**
	 * Returns an array of all PowerPack templates that are enabled.
	 *
	 * @since 1.1.5
	 * @return array
	 */
	static public function get_enabled_templates( $type = 'row' ) {
		if ( 'row' === $type ) {
			$enabled_templates = BB_PowerPack_Admin_Settings::get_option( 'bb_powerpack_templates', true );
		} else {
			$enabled_templates = BB_PowerPack_Admin_Settings::get_option( 'bb_powerpack_page_templates', true );
		}

		if ( false == $enabled_templates || ! is_array( $enabled_templates ) ) {

			$data = self::get_templates_data( $type );

			foreach ( $data as $cat => $info ) {
				$enabled_templates[] = $cat;
			}
		}

		return $enabled_templates;
	}

	/**
	 * Clear all previously enabled templates on special URL parameter.
	 *
	 * @since 1.1.5
	 * @return void
	 */
	static public function clear_enabled_templates() {
		if ( isset( $_GET['page'] ) && 'ppbb-settings' === $_GET['page'] && isset( $_GET['clear_enabled_templates'] ) ) {
			pp_clear_enabled_templates();
		}
	}
}

BB_PowerPack_Templates_Lib::init();