<?php

namespace ABeCe\Booking\Service;

use DateTimeImmutable;
use DateTimeZone;

final class MembershipValidator {
	public const STATUSES = [ 'pending', 'active', 'inactive', 'expired', 'cancelled' ];

	public static function text( mixed $value, string $field, int $max, bool $nullable = false ): ?string {
		if ( null === $value && $nullable ) {
			return null;
		}
		if ( ! is_string( $value ) ) {
			CatalogValidator::invalid( $field, __( 'A text value is required.', 'abece-booking' ) );
		}
		$value = sanitize_text_field( $value );
		if ( '' === $value ) {
			if ( $nullable ) { return null; }
			CatalogValidator::invalid( $field, __( 'This field is required.', 'abece-booking' ) );
		}
		if ( mb_strlen( $value ) > $max ) {
			/* translators: %d: maximum text length in characters. */
			CatalogValidator::invalid( $field, sprintf( __( 'Text must not exceed %d characters.', 'abece-booking' ), $max ) );
		}
		return $value;
	}

	public static function date( mixed $value, string $field, bool $nullable = false ): ?string {
		if ( null === $value && $nullable ) { return null; }
		$date = is_string( $value ) && preg_match( '/^[1-9][0-9]{3}-[0-9]{2}-[0-9]{2}$/D', $value ) ? DateTimeImmutable::createFromFormat( '!Y-m-d', $value ) : false;
		if ( ! $date || $date->format( 'Y-m-d' ) !== $value ) {
			CatalogValidator::invalid( $field, __( 'A valid date in YYYY-MM-DD format is required.', 'abece-booking' ) );
		}
		return $value;
	}

	/** REST accepts an explicit timezone; the approved datetime column stores UTC. */
	public static function instant( mixed $value, string $field ): ?string {
		if ( null === $value ) { return null; }
		if ( ! is_string( $value ) || ! preg_match( '/^[1-9][0-9]{3}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(Z|[+-](?:[01][0-9]|2[0-3]):[0-5][0-9])$/D', $value ) ) {
			CatalogValidator::invalid( $field, __( 'A valid ISO 8601 date and time with timezone is required.', 'abece-booking' ) );
		}
		$date = DateTimeImmutable::createFromFormat( '!Y-m-d\TH:i:sP', str_replace( 'Z', '+00:00', $value ) );
		if ( ! $date || $date->format( 'Y-m-d\TH:i:sP' ) !== str_replace( 'Z', '+00:00', $value ) ) {
			CatalogValidator::invalid( $field, __( 'A valid ISO 8601 date and time with timezone is required.', 'abece-booking' ) );
		}
		$utc = $date->setTimezone( new DateTimeZone( 'UTC' ) );
		if ( (int) $utc->format( 'Y' ) < 1000 || (int) $utc->format( 'Y' ) > 9999 ) {
			CatalogValidator::invalid( $field, __( 'A valid ISO 8601 date and time with timezone is required.', 'abece-booking' ) );
		}
		return $utc->format( 'Y-m-d H:i:s' );
	}
}