<?php

namespace ABeCe\Booking\Service;

use ABeCe\Booking\Domain\CatalogException;
use ABeCe\Booking\Repository\CatalogRepository;

abstract class CatalogService {
	public function __construct( protected readonly CatalogRepository $repository ) {}

	abstract public function fields(): array;
	abstract protected function validate( array $input, array $current ): array;

	public function list( int $page, int $per_page, array $filters = [] ): array {
        \ABeCe\Booking\Edition\ServicePolicy::check($this);
		return $this->repository->list( $page, $per_page, $filters );
	}

	public function get( int $id ): array {
        \ABeCe\Booking\Edition\ServicePolicy::check($this);
		return $this->repository->find( $id ) ?? throw new CatalogException( 'abece_booking_not_found', __( 'The item was not found.', 'abece-booking' ), 404 );
	}

	public function save( array $input, ?int $id = null ): array {
        \ABeCe\Booking\Edition\ServicePolicy::check($this);
		$unknown = array_diff( array_keys( $input ), $this->fields() );
		if ( $unknown ) {
			throw new CatalogException( 'abece_booking_unknown_field', __( 'The request contains an unsupported field.', 'abece-booking' ), 400, (string) reset( $unknown ) );
		}
		$current = null === $id ? [] : array_intersect_key( $this->get( $id ), array_flip( $this->fields() ) );
		$data = $this->validate( $input, $current );
		if ( isset( $data['slug'] ) ) {
			$existing = $this->repository->findBySlug( $data['slug'] );
			if ( $existing && $existing['id'] !== $id ) {
				throw new CatalogException( 'abece_booking_duplicate_slug', __( 'This slug is already in use.', 'abece-booking' ), 409, 'slug' );
			}
		}
		return $this->persist( $data, $id );
	}

	protected function persist( array $data, ?int $id ): array {
		return $this->repository->save( $data, $id );
	}

	public function delete( int $id ): void {
        \ABeCe\Booking\Edition\ServicePolicy::check($this);
		$this->get( $id );
		$this->repository->delete( $id );
	}
}