<?php
/**
 * The class to optimize image.
 *
 * @since   2.0
 * @package LiteSpeed
 */

namespace LiteSpeed;

use WpOrg\Requests\Autoload;
use WpOrg\Requests\Requests;

defined( 'WPINC' ) || exit();

/**
 * Class Img_Optm
 *
 * Handles image optimization operations with QUIC.cloud service.
 */
class Img_Optm extends Base {
	use Img_Optm_Send;
	use Img_Optm_Pull;
	use Img_Optm_Manage;

	const LOG_TAG = '🗜️';

	const CLOUD_ACTION_NEW_REQ         = 'new_req';
	const CLOUD_ACTION_TAKEN           = 'taken';
	const CLOUD_ACTION_REQUEST_DESTROY = 'imgoptm_destroy';
	const CLOUD_ACTION_CLEAN           = 'clean';

	const TYPE_NEW_REQ           = 'new_req';
	const TYPE_RESCAN            = 'rescan';
	const TYPE_DESTROY           = 'destroy';
	const TYPE_RESET_COUNTER     = 'reset_counter';
	const TYPE_CLEAN             = 'clean';
	const TYPE_PULL              = 'pull';
	const TYPE_BATCH_SWITCH_ORI  = 'batch_switch_ori';
	const TYPE_BATCH_SWITCH_OPTM = 'batch_switch_optm';
	const TYPE_CALC_BKUP         = 'calc_bkup';
	const TYPE_RESET_ROW         = 'reset_row';
	const TYPE_RM_BKUP           = 'rm_bkup';

	const STATUS_NEW        = 0; // 'new';
	const STATUS_RAW        = 1; // 'raw';
	const STATUS_REQUESTED  = 3; // 'requested';
	const STATUS_NOTIFIED   = 6; // 'notified';
	const STATUS_DUPLICATED = 8; // 'duplicated';
	const STATUS_PULLED     = 9; // 'pulled';
	const STATUS_FAILED     = -1; // 'failed';
	const STATUS_MISS       = -3; // 'miss';
	const STATUS_ERR_FETCH  = -5; // 'err_fetch';
	const STATUS_ERR_404    = -6; // 'err_404';
	const STATUS_ERR_OPTM   = -7; // 'err_optm';
	const STATUS_XMETA      = -8; // 'xmeta';
	const STATUS_ERR        = -9; // 'err';
	const DB_SIZE           = 'litespeed-optimize-size';
	const DB_SET            = 'litespeed-optimize-set';

	const DB_NEED_PULL = 'need_pull';

	/**
	 * WordPress upload directory info.
	 *
	 * @var array
	 */
	private $wp_upload_dir;

	/**
	 * Temporary post ID for current operation.
	 *
	 * @var int
	 */
	private $tmp_pid;

	/**
	 * Temporary type for current operation.
	 *
	 * @var string
	 */
	private $tmp_type;

	/**
	 * Temporary path for current operation.
	 *
	 * @var string
	 */
	private $tmp_path;

	/**
	 * Images queued for optimization.
	 *
	 * @var array
	 */
	private $_img_in_queue = [];

	/**
	 * List of existing source files.
	 *
	 * @var array
	 */
	private $_existed_src_list = [];

	/**
	 * Set of post IDs.
	 *
	 * @var array
	 */
	private $_pids_set = [];

	/**
	 * Thumbnail set string.
	 *
	 * @var string
	 */
	private $_thumbnail_set = '';

	/**
	 * Image optimization table name.
	 *
	 * @var string
	 */
	private $_table_img_optm;

	/**
	 * Image optimization working table name.
	 *
	 * @var string
	 */
	private $_table_img_optming;

	/**
	 * Flag indicating if cron has run.
	 *
	 * @var bool
	 */
	private $_cron_ran = false;

	/**
	 * Sizes to skip during optimization.
	 *
	 * @var array
	 */
	private $_sizes_skipped = [];

	/**
	 * Media class instance.
	 *
	 * @var Media
	 */
	private $__media;

	/**
	 * Data class instance.
	 *
	 * @var Data
	 */
	private $__data;

	/**
	 * Summary data.
	 *
	 * @var array
	 */
	protected $_summary;

	/**
	 * Output format (webp/avif).
	 *
	 * @var string
	 */
	private $_format = '';

	/**
	 * Init
	 *
	 * @since  2.0
	 */
	public function __construct() {
		Debug2::debug2( '[ImgOptm] init' );

		$this->wp_upload_dir      = wp_upload_dir();
		$this->__media            = $this->cls( 'Media' );
		$this->__data             = $this->cls( 'Data' );
		$this->_table_img_optm    = $this->__data->tb( 'img_optm' );
		$this->_table_img_optming = $this->__data->tb( 'img_optming' );

		$this->_summary = self::get_summary();
		if ( empty( $this->_summary['next_post_id'] ) ) {
			$this->_summary['next_post_id'] = 0;
		}
		if ( $this->conf( Base::O_IMG_OPTM_WEBP ) ) {
			$this->_format = 'webp';
			if ( $this->conf( Base::O_IMG_OPTM_WEBP ) === 2 ) {
				$this->_format = 'avif';
			}
		}

		// Allow users to ignore custom sizes.
		$this->_sizes_skipped = apply_filters( 'litespeed_imgoptm_sizes_skipped', $this->conf( Base::O_IMG_OPTM_SIZES_SKIPPED ) );
	}

	/**
	 * Handle all request actions from main cls
	 *
	 * @since  2.0
	 * @access public
	 */
	public function handler() {
		$type = Router::verify_type();

		switch ( $type ) {
			case self::TYPE_RESET_ROW:
				// phpcs:ignore WordPress.Security.NonceVerification.Recommended
				$id = ! empty( $_GET['id'] ) ? absint( wp_unslash( $_GET['id'] ) ) : false;
				$this->reset_row( $id );
				break;

			case self::TYPE_CALC_BKUP:
				$this->_calc_bkup();
				break;

			case self::TYPE_RM_BKUP:
				$this->rm_bkup();
				break;

			case self::TYPE_NEW_REQ:
				$this->new_req();
				break;

			case self::TYPE_RESCAN:
				$this->_rescan();
				break;

			case self::TYPE_RESET_COUNTER:
				$this->_reset_counter();
				break;

			case self::TYPE_DESTROY:
				$this->_destroy();
				break;

			case self::TYPE_CLEAN:
				$this->clean();
				break;

			case self::TYPE_PULL:
				self::start_async();
				break;

			case self::TYPE_BATCH_SWITCH_ORI:
			case self::TYPE_BATCH_SWITCH_OPTM:
				$this->batch_switch( $type );
				break;

			case substr( $type, 0, 4 ) === 'avif':
			case substr( $type, 0, 4 ) === 'webp':
			case substr( $type, 0, 4 ) === 'orig':
				$this->_switch_optm_file( $type );
				break;

			default:
				break;
		}

		Admin::redirect();
	}
}