<?php
/**
 * In-memory busy provider for bookings (used by unit tests and handlers).
 *
 * @package Bookline
 */

declare( strict_types=1 );

namespace Bookline\Domain\Availability;

/**
 * Supplies precomputed busy intervals (buffer footprints).
 */
final class StaticBusyProvider implements BusyIntervalProvider {

	/**
	 * Constructor.
	 *
	 * @param string      $id   Provider identifier.
	 * @param IntervalSet $busy Precomputed busy set.
	 */
	public function __construct(
		private readonly string $id,
		private readonly IntervalSet $busy,
	) {}

	/**
	 * Stable provider identifier.
	 */
	public function identifier(): string {
		return $this->id;
	}

	/**
	 * Busy intervals overlapping the query range (buffer footprints).
	 *
	 * @param AvailabilityQuery $query Availability query.
	 */
	public function get_busy_intervals( AvailabilityQuery $query ): IntervalSet {
		unset( $query );
		return $this->busy;
	}
}