<?php
/**
 * Debug/Status page
 *
 * @package     UserRegistration/Admin/System Status
 * @version     1.0.5
 */

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

/**
 * UR_Admin_Status Class.
 */
class UR_Admin_Status {

	/**
	 * Handles output of the reports page in admin.
	 */
	public static function output() {
		include_once __DIR__ . '/views/html-admin-page-status.php';
	}


	/**
	 * Show the logs page.
	 */
	public static function status_logs() {
		self::status_logs_file();
	}


	/**
	 * Show the log page contents for file log handler.
	 */
	public static function status_logs_file() {

		if ( ! empty( $_REQUEST['handle'] ) ) {
			self::remove_log();
		}
		if ( ! empty( $_REQUEST['handle_all'] ) ) {
			self::remove_all_logs();
		}

		$logs = self::scan_log_files();

		if ( ! empty( $_REQUEST['log_file'] ) && isset( $logs[ sanitize_title( wp_unslash( $_REQUEST['log_file'] ) ) ] ) ) { // phpcs:ignore WordPress.Security.NonceVerification
			$viewed_log = $logs[ sanitize_title( wp_unslash( $_REQUEST['log_file'] ) ) ]; // phpcs:ignore WordPress.Security.NonceVerification
		} elseif ( ! empty( $logs ) ) {
			$viewed_log = current( $logs );
		}

		$handle = ! empty( $viewed_log ) ? self::get_log_file_handle( $viewed_log ) : '';

		include_once 'views/html-admin-page-status-logs.php';
	}


	/**
	 * Retrieve metadata from a file. Based on WP Core's get_file_data function.
	 *
	 * @since  2.1.1
	 *
	 * @param  string $file Path to the file.
	 *
	 * @return string
	 */
	public static function get_file_version( $file ) {

		// Avoid notices if file does not exist.
		if ( ! file_exists( $file ) ) {
			return '';
		}

		// We don't need to write to the file, so just open for reading.
		$fp = fopen( $file, 'r' );

		// Pull only the first 8kiB of the file in.
		$file_data = fread( $fp, 8192 );

		// PHP will close file handle, but we are good citizens.
		fclose( $fp );

		// Make sure we catch CR-only line endings.
		$file_data = str_replace( "\r", "\n", $file_data );
		$version   = '';

		if ( preg_match( '/^[ \t\/*#@]*' . preg_quote( '@version', '/' ) . '(.*)$/mi', $file_data, $match ) && $match[1] ) {
			$version = _cleanup_header_comment( $match[1] );
		}

		return $version;
	}

	/**
	 * Return the log file handle.
	 *
	 * @param string $filename Filename.
	 *
	 * @return string
	 */
	public static function get_log_file_handle( $filename ) {
		return substr( $filename, 0, strlen( $filename ) > 37 ? strlen( $filename ) - 37 : strlen( $filename ) - 4 );
	}

	/**
	 * Scan the template files.
	 *
	 * @param  string $template_path Template Path.
	 *
	 * @return array
	 */
	public static function scan_template_files( $template_path ) {

		$files  = @scandir( $template_path );
		$result = array();

		if ( ! empty( $files ) ) {

			foreach ( $files as $key => $value ) {

				if ( ! in_array( $value, array( '.', '..' ) ) ) {

					if ( is_dir( $template_path . DIRECTORY_SEPARATOR . $value ) ) {
						$sub_files = self::scan_template_files( $template_path . DIRECTORY_SEPARATOR . $value );

						foreach ( $sub_files as $sub_file ) {
							$result[] = $value . DIRECTORY_SEPARATOR . $sub_file;
						}
					} else {
						$result[] = $value;
					}
				}
			}
		}

		return $result;
	}

	/**
	 * Scan the log files.
	 *
	 * @return array
	 */
	public static function scan_log_files() {
		$files  = @scandir( UR_LOG_DIR );
		$result = array();

		if ( ! empty( $files ) ) {

			foreach ( $files as $key => $value ) {

				if ( ! in_array( $value, array( '.', '..' ) ) && null !== $value ) {
					if ( ! is_dir( $value ) && strstr( $value, '.log' ) ) {
						$result[ sanitize_title( $value ) ] = $value;
					}
				}
			}
		}

		return $result;
	}

	/**
	 * Remove/delete the chosen file.
	 */
	public static function remove_log() {

		if ( empty( $_REQUEST['_wpnonce'] ) || ! wp_verify_nonce( sanitize_key( wp_unslash( $_REQUEST['_wpnonce'] ) ), 'remove_log' ) ) { // phpcs:ignore WordPress.Security.NonceVerification
			wp_die( esc_html__( 'Action failed. Please refresh the page and retry.', 'user-registration' ) );
		}

		if ( ! empty( $_REQUEST['handle'] ) ) {
			$log_handler = new UR_Log_Handler_File();
			$log_handler->remove( sanitize_text_field( wp_unslash( $_REQUEST['handle'] ) ) );
		}
		?>
		<script>
		var redirect = '<?php echo esc_url( admin_url( 'admin.php?page=user-registration-status&tab=logs' ) ); ?>';
		window.setTimeout( function () {
			window.location.href = redirect;
		})
		</script>
		<?php
	}

	/**
	 * Remove/delete all logs.
	 */
	public static function remove_all_logs() {
		if ( empty( $_REQUEST['_wpnonce'] ) || ! wp_verify_nonce( sanitize_key( wp_unslash( $_REQUEST['_wpnonce'] ) ), 'remove_all_logs' ) ) {
			wp_die( esc_html__( 'Action failed. Please refresh the page and retry.', 'user-registration' ) );
		}

		if ( ! empty( $_REQUEST['handle_all'] ) ) {
			$log_handler = new UR_Log_Handler_File();
			$log_handler->remove_all();
		}

		?>
		<script>
		var redirect = '<?php echo esc_url( admin_url( 'admin.php?page=user-registration-status&tab=logs' ) ); ?>';
		window.setTimeout( function () {
			window.location.href = redirect;
		})
		</script>
		<?php
	}


	/**
	 * Displays the system information admin page.
	 *
	 * This method includes the system info page template
	 * to show relevant system details in the WordPress admin panel.
	 *
	 * @return void
	 */
	public static function system_info() {
		include_once __DIR__ . '/views/html-admin-page-system-info.php';
	}
}
