<?php
/**
 * Admin calendar booking create (docs/08 §2.3 / M11 tests).
 *
 * @package Bookline
 */

declare( strict_types=1 );

namespace Bookline\Application\Booking;

use Bookline\Domain\Booking\Booking;
use Bookline\Domain\Service\ServiceDurationRepository;
use Bookline\Domain\Service\ServiceRepository;
use Bookline\Domain\Shared\DomainException;
use Bookline\Domain\Shared\EmailAddress;
use Bookline\Domain\Shared\PhoneNumber;
use Bookline\Domain\Shared\TimeZoneId;
use Bookline\Infrastructure\Settings\SettingsStore;
use DateTimeImmutable;
use DateTimeZone;

/**
 * Builds a CreateBookingCommand from an admin form payload.
 *
 * @since 0.1.0
 */
final class CreateAdminBookingHandler {

	/**
	 * Constructor.
	 *
	 * @param CreateBookingHandler      $create    Create use case.
	 * @param ServiceRepository         $services  Services.
	 * @param ServiceDurationRepository $durations Durations.
	 * @param SettingsStore             $settings  Settings.
	 */
	public function __construct(
		private readonly CreateBookingHandler $create,
		private readonly ServiceRepository $services,
		private readonly ServiceDurationRepository $durations,
		private readonly SettingsStore $settings,
	) {}

	/**
	 * Create a confirmed booking from the calendar.
	 *
	 * @param array<string, mixed> $payload Fields.
	 *
	 * @throws DomainException When validation fails.
	 */
	public function handle( array $payload ): Booking {
		$service_id = (int) ( $payload['service_id'] ?? 0 );
		$agent_id   = (int) ( $payload['agent_id'] ?? 0 );
		$location_id = isset( $payload['location_id'] ) ? (int) $payload['location_id'] : 0;
		$service    = $this->services->find_by_id( $service_id );
		if ( null === $service ) {
			throw new DomainException( 'booking.service_missing', 'Service not found.' );
		}
		if ( $agent_id < 1 ) {
			throw new DomainException( 'booking.agent_required', 'Agent is required.' );
		}

		$duration = null;
		foreach ( $this->durations->find_by_service_id( $service_id ) as $row ) {
			if ( $row->is_default() ) {
				$duration = $row;
				break;
			}
			if ( null === $duration ) {
				$duration = $row;
			}
		}
		if ( null === $duration ) {
			throw new DomainException( 'booking.duration_missing', 'This service has no duration.' );
		}

		$tz_id = new TimeZoneId( (string) $this->settings->get( 'general.timezone' ) );
		$tz    = new DateTimeZone( $tz_id->to_string() );

		$start_raw = trim( (string) ( $payload['start_local'] ?? $payload['start_at'] ?? '' ) );
		if ( '' === $start_raw ) {
			throw new DomainException( 'booking.start_required', 'Start date and time are required.' );
		}

		$start_local = DateTimeImmutable::createFromFormat( 'Y-m-d\TH:i', $start_raw, $tz );
		if ( false === $start_local ) {
			$start_local = DateTimeImmutable::createFromFormat( 'Y-m-d H:i', $start_raw, $tz );
		}
		if ( false === $start_local ) {
			try {
				$start_local = new DateTimeImmutable( $start_raw, $tz );
			} catch ( \Exception $e ) {
				throw new DomainException( 'booking.start_invalid', 'Start date and time are invalid.' );
			}
		}

		$end_local = $start_local->modify( '+' . $duration->duration_min() . ' minutes' );
		$utc       = new DateTimeZone( 'UTC' );
		$start_utc = $start_local->setTimezone( $utc );
		$end_utc   = $end_local->setTimezone( $utc );
		$buffer_start = $start_utc->modify( '-' . $service->buffer_before_min() . ' minutes' );
		$buffer_end   = $end_utc->modify( '+' . $service->buffer_after_min() . ' minutes' );

		$first = trim( (string) ( $payload['customer_first_name'] ?? $payload['first_name'] ?? '' ) );
		$last  = trim( (string) ( $payload['customer_last_name'] ?? $payload['last_name'] ?? '' ) );
		$email = trim( (string) ( $payload['customer_email'] ?? $payload['email'] ?? '' ) );
		if ( '' === $first || '' === $email ) {
			throw new DomainException( 'booking.customer_required', 'Customer first name and email are required.' );
		}

		$phone = null;
		$phone_raw = trim( (string) ( $payload['customer_phone'] ?? $payload['phone'] ?? '' ) );
		if ( '' !== $phone_raw ) {
			$phone = new PhoneNumber( $phone_raw );
		}

		$command = new CreateBookingCommand(
			$service_id,
			$duration->id(),
			$agent_id,
			$location_id > 0 ? $location_id : null,
			$start_utc,
			$end_utc,
			$buffer_start,
			$buffer_end,
			$tz_id,
			$start_local,
			max( 1, (int) ( $payload['attendees'] ?? 1 ) ),
			$duration->price(),
			$first,
			'' !== $last ? $last : null,
			new EmailAddress( $email ),
			$phone,
			isset( $payload['notes'] ) ? trim( (string) $payload['notes'] ) : null,
			0,
			true,
		);

		return $this->create->handle( $command );
	}
}