import Foundation

#if canImport(FoundationNetworking)
	import FoundationNetworking
#endif

public actor MusicBrainzCoordinator {
	private var nextAvailableTime: ContinuousClock.Instant = .now
	private let clock = ContinuousClock()
	private let session: URLSession

	public init(session: URLSession = .shared) {
		self.session = session
	}

	public func perform(_ request: URLRequest) async throws(MusicBrainzError) -> (Data, URLResponse)
	{
		let now = clock.now
		let executionTime = max(now, nextAvailableTime)
		nextAvailableTime = executionTime + .seconds(1)
		let delay = now.duration(to: executionTime)

		if delay > .zero {
			do {
				try await Task.sleep(for: delay)
			} catch {
				throw .coordinator(error)
			}
		}

		do {
			return try await session.data(for: request)
		} catch {
			throw .coordinator(error)
		}
	}
}