<?php

namespace ABeCe\Booking\Service;

use ABeCe\Booking\Domain\CatalogException;
use ABeCe\Booking\Support\Time;

/** Local PHP astronomical calculation; no external API or HTTP calls. */
final class SunService {
	public function __construct( private readonly LocationService $location ) {}
	public function events( string $date ): ?array {
		$location = $this->location->get();
		if ( null === $location['latitude'] || null === $location['longitude'] ) { throw new CatalogException( 'abece_booking_location_required', __( 'Set the club location before using sun-based opening hours.', 'abece-booking' ), 503 ); }
		$anchor = Time::local( $date, '12:00' );
		if ( ! $anchor ) { return null; }
		// Check adjacent UTC days too: local dates may differ near the date line.
		foreach ( [ 0, -86400, 86400 ] as $offset ) {
			$info = date_sun_info( $anchor->getTimestamp() + $offset, (float) $location['latitude'], (float) $location['longitude'] );
			if ( is_int( $info['sunrise'] ) && is_int( $info['sunset'] ) && Time::timestamp( $info['sunrise'] )->format( 'Y-m-d' ) === $date ) { return [ 'sunrise' => $info['sunrise'], 'sunset' => $info['sunset'] ]; }
		}
		// No finite sunrise/sunset in polar day/night: offer no sun-based slots.
		return null;
	}
}