<?php

namespace AdFuz\Log;

use DateTime;

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

/**
 * Class Log.
 */
class File {

	const DEBUG = 'DEBUG';

	const INFO = 'INFO';

	const WARNING = 'WARNING';

	const ERROR = 'ERROR';

	const CLEANING_DAYS = 5;
	/**
	 * Filename.
	 *
	 * @var string $filename .
	 */
	protected static $filename;
	/**
	 * Instance.
	 *
	 * @var object.
	 */
	private static $instance;
	/**
	 * Channel.
	 *
	 * @var string
	 */
	protected $channel;

	/**
	 * Path.
	 *
	 * @var resource $path
	 */
	protected $path;
	/**
	 * TimeZone.
	 *
	 * @var string
	 */
	protected $time_zone = 'America/Los_Angeles';
	/**
	 * Log status.
	 *
	 * @var true $is_logging_enabled Is Logging Enabled.
	 */
	private $is_logging_enabled;
	private $upload_path;

	public function __construct( $upload_path = null ) {
		$this->upload_path = $upload_path ?: wp_upload_dir()['basedir'] . '/ad-fuz/log/';
	}

	/**
	 * Upload Directory Path.
	 *
	 * @return string
	 */
	private function upload_dir_path(): string {
		return $this->upload_path;
	}

	private function __clone() {
	}

	/**
	 * Get Instance.
	 *
	 * @return self
	 */
	public static function get_instance( $upload_path = null ) {
		if ( ! self::$instance ) {
			self::$instance = new self( $upload_path );
		}

		return self::$instance;
	}

	/**
	 * Initialize
	 *
	 * @param  string $channel  Channel.
	 */

	public function initialize( string $channel = 'default' ): File {
		$AdFuz         = AdFuz();
		$this->channel = $channel;
		$this->path();
		$this->cleaning();
		/**
		 * TODO: remove default value of true in Production.
		 */
		$this->is_logging_enabled = $AdFuz->core['debug']['type'];

		return $this;
	}

	/**
	 * File Path.
	 */
	public function path() {
		$upload_base_dir = $this->upload_dir_path();

		if ( ! is_dir( $upload_base_dir ) ) {
			wp_mkdir_p( $upload_base_dir );
		}
		$date      = gmdate( 'Ymd' );
		$full_path = $upload_base_dir . $this->channel . '__' . $date . '.log';
		if ( ! file_exists( $full_path ) ) {
			include_once ABSPATH . 'wp-admin/includes/file.php';
			\WP_Filesystem();
			global $wp_filesystem;
			$wp_filesystem->put_contents( $full_path, '', FS_CHMOD_FILE );
		}

		$this->path = $full_path;
	}


	/**
	 * Cleaning Log Files.
	 */
	public function cleaning() {
		if ( $this->is_ready_to_clean() ) {
			$dir_path = $this->upload_dir_path();
			$files    = array_diff( scandir( $dir_path ), array( '.', '..' ) ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_scandir

			foreach ( $files as $file ) {
				$split = preg_split( '/(__|\.)/', $file );
				if ( count( $split ) === 3 ) {
					$current_date = gmdate( 'Ymd', strtotime( '- ' . self::CLEANING_DAYS . ' days' ) );
					if ( (int) $split[1] < (int) $current_date ) {
						wp_delete_file( $dir_path . $file );
					}
				} else {
					wp_delete_file( $dir_path . $file );
				}
			}
		}
	}

	/**
	 * Check if the cleaning days are greater to clean the files.
	 *
	 * @return bool
	 */
	private function is_ready_to_clean(): bool {
		$max_date = get_transient( 'adfuz_delete_log' );
		if ( false === $max_date ) {
			$max_time = self::CLEANING_DAYS * 24 * 60 * 60;
			set_transient( 'adfuz_delete_log', true, $max_time );

			return true;
		}

		return false;
	}

	/**
	 * Set Time Zone
	 *
	 * @param  string $time_zone  Time Zone.
	 */
	public function set_time_zone( string $time_zone ) {
		if ( in_array( $time_zone, timezone_identifiers_list() ) ) {
			$this->time_zone = $time_zone;
		}
	}

	/**
	 * Write Log.
	 *
	 * @param  mixed  $message  message.
	 * @param  string $level  Level.
	 */
	public function write_log( $message, string $level = self::DEBUG ) {
		if ( 'test' === $this->is_logging_enabled ) {
			$this->write_line( $message, $level );
		}
	}

	/**
	 * Write Line.
	 *
	 * @param  mixed  $message  message.
	 * @param  string $level  Level.
	 */
	protected function write_line( $message, string $level ) {
		switch ( $level ) {
			case self::INFO:
				$this->write_in_to_file( $message, self::INFO );
				break;
			case self::WARNING:
				$this->write_in_to_file( $message, self::WARNING );
				break;
			case self::ERROR:
				$this->write_in_to_file( $message, self::ERROR );
				break;
			default:
				$this->write_in_to_file( $message );
				break;
		}
	}

	/**
	 * Write into file.
	 *
	 * @param  mixed  $message  message.
	 * @param  string $level  Level.
	 */
	protected function write_in_to_file( $message, string $level = self::DEBUG ) {
		$write = sprintf( " \n \n ================== %s (%s) START================== \n \n", $this->get_time(), $level );
		// phpcs:ignore
		$write .= print_r( $message, 1 );
		$write .= sprintf( " \n \n ================== %s (%s) END================== \n \n \n", $this->get_time(), $level );
		// phpcs:ignore

		// phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_file_put_contents
		file_put_contents( $this->path, $write, FILE_APPEND | LOCK_EX );
	}

	/**
	 * Get Time
	 *
	 * @return string
	 */
	public function get_time(): string {
		$date = new DateTime();
		$date->setTimezone( new \DateTimeZone( $this->time_zone ) );

		return $date->format( 'd/m/Y H:i:s' );
	}

}