<?php
/**
 * Guest customer identity rules (docs/06 §10).
 *
 * @package Bookline
 */

declare( strict_types=1 );

namespace Bookline\Application\Booking;

use Bookline\Domain\Customer\Customer;
use Bookline\Domain\Customer\CustomerRepository;
use Bookline\Domain\Customer\CustomerStatus;
use Bookline\Domain\Shared\Clock;
use Bookline\Domain\Shared\EmailAddress;
use Bookline\Domain\Shared\PhoneNumber;
use Bookline\Domain\Shared\Uuid;

/**
 * Creates or reuses customers without mutating verified identities from guest input.
 *
 * @since 0.1.0
 */
final class GuestCustomerResolver {

	/**
	 * Constructor.
	 *
	 * @param CustomerRepository $customers Customer port.
	 * @param Clock              $clock     Clock.
	 */
	public function __construct(
		private readonly CustomerRepository $customers,
		private readonly Clock $clock,
	) {}

	/**
	 * Resolve a customer id for a guest booking.
	 *
	 * @param string           $first_name First name.
	 * @param string|null      $last_name  Last name.
	 * @param EmailAddress     $email      Email.
	 * @param PhoneNumber|null $phone      Phone.
	 *
	 * @since 0.1.0
	 */
	public function resolve(
		string $first_name,
		?string $last_name,
		EmailAddress $email,
		?PhoneNumber $phone,
	): Customer {
		$now      = $this->clock->now();
		$existing = $this->customers->find_by_email( $email );

		foreach ( $existing as $row ) {
			if ( $row->is_email_verified() ) {
				// Verified identity: always create a new pending row — never mutate.
				$pending = new Customer(
					null,
					Uuid::generate(),
					null,
					$first_name,
					$last_name,
					$email,
					null,
					$phone,
					null,
					null,
					null,
					null,
					false,
					null,
					CustomerStatus::Pending,
					null,
					$now,
					$now,
				);
				$this->customers->save( $pending );
				return $pending;
			}
		}

		foreach ( $existing as $row ) {
			if ( CustomerStatus::Pending === $row->status() || CustomerStatus::Active === $row->status() ) {
				return $row;
			}
		}

		$customer = new Customer(
			null,
			Uuid::generate(),
			null,
			$first_name,
			$last_name,
			$email,
			null,
			$phone,
			null,
			null,
			null,
			null,
			false,
			null,
			CustomerStatus::Active,
			null,
			$now,
			$now,
		);
		$this->customers->save( $customer );
		return $customer;
	}
}