<?php
/**
 * One strict display schema for blocks, shortcodes and the embed admin.
 *
 * @package Waitlistize
 */
namespace Waitlistize\Rendering;

use Waitlistize\Api\Services;
use WP_Error;

final class Attributes {
	public static function defaults( string $kind ): array {
		// phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents -- Reads bundled local block metadata, never a URL.
		$metadata = json_decode( file_get_contents( dirname( WAITLISTIZE_FILE ) . '/blocks/' . $kind . '/block.json' ), true );
		return array_map( static fn ( $attribute ) => $attribute['default'], $metadata['attributes'] );
	}

	public static function validate( string $kind, array $input ): array|WP_Error {
		$defaults = self::defaults( $kind );
		// WordPress core wrapper attributes are not business or transport parameters.
		unset( $input['className'], $input['anchor'], $input['metadata'] );
		if ( array_diff_key( $input, $defaults + array( 'serviceSlug' => '' ) ) ) {
			return Services::error( 'embed_parameters', 400 );
		}
		$values = $input + $defaults;
		foreach ( array( 'serviceId', 'connectionAccountId', 'pageSize' ) as $key ) {
			if ( array_key_exists( $key, $values ) && ( ! is_int( $values[ $key ] ) || $values[ $key ] < 0 || $values[ $key ] > 2147483647 ) ) {
				return Services::error( 'embed_parameters', 400 );
			}
		}
		if ( isset( $values['pageSize'] ) && ( $values['pageSize'] < 1 || $values['pageSize'] > 100 ) ) {
			return Services::error( 'embed_parameters', 400 );
		}
		foreach ( array(
			'locale'           => array( 'auto', 'hu', 'en', 'de' ),
			'styleSource'      => array( 'inherit', 'service' ),
			'resourceSelector' => array( 'hidden', 'optional' ),
			'typeFilter'       => array( 'all', 'single', 'group' ),
			'layout'           => array( 'list', 'grid' ),
		) as $key => $options ) {
			if ( array_key_exists( $key, $values ) && ! in_array( $values[ $key ], $options, true ) ) {
				return Services::error( 'embed_parameters', 400 );
			}
		}
		foreach ( array( 'showTitle', 'showDescription', 'showPrice' ) as $key ) {
			if ( array_key_exists( $key, $values ) && ! is_bool( $values[ $key ] ) ) {
				return Services::error( 'embed_parameters', 400 );
			}
		}
		if ( array_key_exists( 'serviceSlug', $values ) && ( 'booking' !== $kind || ! is_string( $values['serviceSlug'] ) || ! preg_match( '/\A[A-Za-z0-9_-]{1,255}\z/', $values['serviceSlug'] ) || $values['serviceId'] > 0 ) ) {
			return Services::error( 'embed_parameters', 400 );
		}
		return $values;
	}

	public static function shortcode( array $attributes ): array|WP_Error {
		$map  = array(
			'service_id'            => 'serviceId',
			'service'               => 'serviceSlug',
			'connection_account_id' => 'connectionAccountId',
			'resource_selector'     => 'resourceSelector',
			'locale'                => 'locale',
			'style_source'          => 'styleSource',
			'show_title'            => 'showTitle',
			'show_description'      => 'showDescription',
			'show_price'            => 'showPrice',
			'type'                  => 'typeFilter',
			'layout'                => 'layout',
			'page_size'             => 'pageSize',
		);
		$kind = isset( $attributes['service_id'] ) || isset( $attributes['service'] ) ? 'booking' : 'services';
		if ( isset( $attributes['service_id'], $attributes['service'] ) ) {
			return Services::error( 'embed_parameters', 400 );
		}
		$input = array();
		foreach ( $attributes as $key => $value ) {
			if ( ! isset( $map[ $key ] ) || ! is_string( $value ) ) {
				return Services::error( 'embed_parameters', 400 );
			}
			if ( in_array( $key, array( 'service_id', 'connection_account_id', 'page_size' ), true ) ) {
				if ( ! preg_match( '/\A[0-9]{1,10}\z/', $value ) ) {
					return Services::error( 'embed_parameters', 400 );
				}
				$value = (int) $value;
			} elseif ( str_starts_with( $key, 'show_' ) ) {
				if ( ! in_array( $value, array( 'true', 'false', '1', '0' ), true ) ) {
					return Services::error( 'embed_parameters', 400 );
				}
				$value = in_array( $value, array( 'true', '1' ), true );
			}
			$input[ $map[ $key ] ] = $value;
		}
		$values = self::validate( $kind, $input );
		return is_wp_error( $values ) ? $values : array(
			'kind'       => $kind,
			'attributes' => $values,
		);
	}

	public static function code( string $kind, array $attributes ): string {
		$parts = array( '[waitlistize', 'connection_account_id="' . $attributes['connectionAccountId'] . '"' );
		$map   = array(
			'serviceId'        => 'service_id',
			'resourceSelector' => 'resource_selector',
			'locale'           => 'locale',
			'styleSource'      => 'style_source',
			'showTitle'        => 'show_title',
			'showDescription'  => 'show_description',
			'showPrice'        => 'show_price',
			'typeFilter'       => 'type',
			'layout'           => 'layout',
			'pageSize'         => 'page_size',
		);
		foreach ( self::defaults( $kind ) as $key => $default ) {
			if ( isset( $map[ $key ] ) ) {
				$value   = $attributes[ $key ];
				$parts[] = $map[ $key ] . '="' . ( is_bool( $value ) ? ( $value ? 'true' : 'false' ) : $value ) . '"';
			}
		}
		return implode( ' ', $parts ) . ']';
	}
}