<?php
/** Edition-neutral staff selection and retained booking relationships. */
namespace Abientot\Support;
use Abientot\Repositories\StaffRepository;
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}
final class BookingStaff {
	public static function show_relationships(): bool {
		return count( ( new StaffRepository() )->all( 2 ) ) > 1 || ( new \Abientot\Repositories\ResourceBookingRepository() )->has_unassigned();
	}
	public static function timezone( array $staff, array $location ): \DateTimeZone {
		foreach ( array( (string) ( $staff['timezone'] ?? '' ), (string) ( $location['timezone'] ?? '' ), wp_timezone_string() ) as $candidate ) {
			try {
				return new \DateTimeZone( $candidate );
			} catch ( \Exception $error ) {
			}
		}
		return wp_timezone();
	}
	public static function edit_start( array $booking ): string {
		if ( ( new \Abientot\Repositories\ResourceBookingRepository() )->snapshot( (int) ( $booking['id'] ?? 0 ) ) ) {
			return ( new \DateTimeImmutable( (string) $booking['start_utc'], new \DateTimeZone( 'UTC' ) ) )->setTimezone( new \DateTimeZone( (string) $booking['timezone'] ) )->format( 'Y-m-d\TH:i' );
		}
		$staff    = ( new StaffRepository() )->find( (int) $booking['staff_id'] ) ?? array();
		$location = ( new \Abientot\Repositories\LocationsRepository() )->find( (int) $booking['location_id'] ) ?? array();
		return ( new \DateTimeImmutable( (string) $booking['start_utc'], new \DateTimeZone( 'UTC' ) ) )->setTimezone( self::timezone( $staff, $location ) )->format( 'Y-m-d\TH:i' );
	}
	public static function resolve( string $surface, ?array $booking = null, ?int $service_id = null ): array {
		if ( $booking && (int) $booking['staff_id'] === 0 && ( new \Abientot\Repositories\ResourceBookingRepository() )->snapshot( (int) $booking['id'] ) ) {
			return array(
				'id'           => (int) $booking['staff_id'],
				'display_name' => StaffFilter::label(),
				'timezone'     => (string) $booking['timezone'],
				'status'       => 'active'
			);
		}
		$repo  = new StaffRepository();
		$staff = $booking ? $repo->find( (int) $booking['staff_id'] ) : $repo->default_staff();
		// Premium may select staff for new/public operations. Historical IDs remain canonical.
		$staff = apply_filters( 'abientot_booking_staff', $staff, $surface, $booking, $service_id );
		return is_array( $staff ) ? $staff : array(
			'id'           => 0,
			'display_name' => '',
			'timezone'     => ''
		);
	}
}