<?php
/**
 * Reload subject fields for fresh-context steps (docs/20 §6.1).
 *
 * @package Bookline
 */

declare( strict_types=1 );

namespace Bookline\Application\Automation;

use Bookline\Domain\Automation\AutomationContext;
use Bookline\Domain\Automation\SubjectType;
use Bookline\Domain\Booking\BookingRepository;
use Bookline\Domain\Customer\CustomerRepository;
use Bookline\Domain\OrderIntent\OrderIntentRepository;

/**
 * Production refresher. Returns null when the subject is void.
 *
 * @since 0.1.0
 */
final class SubjectAutomationContextRefresher implements AutomationContextRefresher {

	/**
	 * Constructor.
	 *
	 * @param BookingRepository        $bookings  Bookings.
	 * @param CustomerRepository       $customers Customers.
	 * @param OrderIntentRepository    $intents   Intents.
	 * @param AutomationContextFactory $factory Factory.
	 */
	public function __construct(
		private readonly BookingRepository $bookings,
		private readonly CustomerRepository $customers,
		private readonly OrderIntentRepository $intents,
		private readonly AutomationContextFactory $factory,
	) {}

	/**
	 * {@inheritDoc}
	 *
	 * @param AutomationContext $ctx Snapshot.
	 */
	public function refresh( AutomationContext $ctx ): ?AutomationContext {
		return match ( $ctx->subject_type() ) {
			SubjectType::Booking  => $this->refresh_booking( $ctx ),
			SubjectType::Customer => $this->refresh_customer( $ctx ),
			SubjectType::Intent   => $this->refresh_intent( $ctx ),
			SubjectType::Payment  => $ctx,
		};
	}

	/**
	 * Refresh a booking.
	 *
	 * @param AutomationContext $ctx Snapshot.
	 */
	private function refresh_booking( AutomationContext $ctx ): ?AutomationContext {
		$booking = $this->bookings->find_by_id( $ctx->subject_id() );
		if ( null === $booking || $this->factory->booking_is_void( $booking ) ) {
			return null;
		}
		$customer = $this->customers->find_by_id( $booking->customer_id() );
		$fresh    = $this->factory->for_booking( $ctx->event(), $ctx->trigger_event_id(), $booking, $customer, $ctx->is_test() );
		return $ctx->with_fields( $fresh->fields(), $fresh->snapshot_at() );
	}

	/**
	 * Refresh a customer.
	 *
	 * @param AutomationContext $ctx Snapshot.
	 */
	private function refresh_customer( AutomationContext $ctx ): ?AutomationContext {
		$customer = $this->customers->find_by_id( $ctx->subject_id() );
		if ( null === $customer ) {
			return null;
		}
		$fresh = $this->factory->for_customer( $ctx->event(), $ctx->trigger_event_id(), $customer, $ctx->is_test() );
		return $ctx->with_fields( $fresh->fields(), $fresh->snapshot_at() );
	}

	/**
	 * Refresh an intent.
	 *
	 * @param AutomationContext $ctx Snapshot.
	 */
	private function refresh_intent( AutomationContext $ctx ): ?AutomationContext {
		$intent = $this->intents->find_by_id( $ctx->subject_id() );
		if ( null === $intent ) {
			return null;
		}
		$fresh = $this->factory->for_intent( $ctx->event(), $ctx->trigger_event_id(), $intent, $ctx->is_test() );
		return $ctx->with_fields( $fresh->fields(), $fresh->snapshot_at() );
	}
}