<?php
declare( strict_types=1 );

namespace ACP\Export\RequestHandler\Ajax;

use AC\Nonce;
use AC\Request;
use AC\Type\ListScreenId;
use ACP\Export\ColumnStateCollection;
use ACP\Export\Repository\UserColumnStateRepository;
use ACP\Export\Type\ColumnState;
use ACP\RequestAjaxHandler;
use Exception;

class SaveExportPreference implements RequestAjaxHandler {

	private $state_repository;

	public function __construct() {
		$this->state_repository = new UserColumnStateRepository();
	}

	public function handle(): void {
		$request = new Request();

		if ( ! ( new Nonce\Ajax() )->verify( $request ) ) {
			wp_send_json_error( 'invalid nonce' );
		}

		$id = (string) $request->filter( 'list_id', null, FILTER_SANITIZE_FULL_SPECIAL_CHARS );
		$data = (string) $request->filter( 'data' );

		if ( ! $data || ! ListScreenId::is_valid_id( $id ) ) {
			wp_send_json_error();
		}

		try {
			$this->state_repository->save(
				new ListScreenId( $id ),
				$this->get_column_states( $data )
			);
		} catch ( Exception $e ) {
			wp_send_json_error();
		}

		wp_send_json_success();
	}

	private function get_column_states( string $data ): ColumnStateCollection {
		$collection = new ColumnStateCollection();
		foreach ( json_decode( $data, true ) as $item ) {
			$collection->add( new ColumnState( $item['column_name'], $item['active'] ) );
		}

		return $collection;
	}

}