import SwiftUI
import class AudioEngine.AudioEngine
import enum AudioEngine.PlaybackState

struct PlaybackControls: View {
	@Bindable var engine: AudioEngine

	var body: some View {
		HStack(spacing: 32) {
			Button(action: { engine.skipBackward() }) {
				Image(systemName: "backward.fill")
					.font(.title2)
			}
			.disabled(engine.state == .idle)

			Button(action: togglePlayback) {
				Image(systemName: playButtonIcon)
					.font(.title)
			}

			Button(action: { engine.skipForward() }) {
				Image(systemName: "forward.fill")
					.font(.title2)
			}
			.disabled(engine.state == .idle)
		}
		.padding()
	}

	private var playButtonIcon: String {
		switch engine.state {
		case .playing: "pause.fill"
		case .synthesizing: "hourglass"
		case .paused: "play.fill"
		case .idle: "play.fill"
		}
	}

	private func togglePlayback() {
		switch engine.state {
		case .playing: engine.pause()
		case .paused: engine.resume()
		default: break
		}
	}
}