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// Copyright 2025 Shota FUJI
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// SPDX-License-Identifier: Apache-2.0

import OSLog
import RoonKit
import SwiftUI

struct PlaybackBar: View {
	@Environment(ZoneDataModel.self) var model: ZoneDataModel

	@State private var isPerformingAction = false

	private var zone: TransportService.Zone? {
		model.zone
	}

	var body: some View {
		VStack(alignment: .leading, spacing: 14) {
			HStack(spacing: 8) {
				if let imageKey = zone?.nowPlaying?.imageKey {
					Artwork(imageKey: imageKey, width: 96, height: 96)
						.frame(width: 48, height: 48)
				}

				VStack(alignment: .leading, spacing: 2) {
					let line1 = zone?.nowPlaying?.doubleLine.line1 ?? " "
					let line2 = zone?.nowPlaying?.doubleLine.line2 ?? " "

					Text(line1)
						.font(.headline)
						.lineLimit(1)

					Text(line2)
						.font(.subheadline)
						.lineLimit(1)
				}
				.frame(maxWidth: .infinity, alignment: .leading)
			}

			HStack {
				HStack {
					Button {
						Task {
							await performAction(.previous)
						}
					} label: {
						Label("Previous", systemImage: "backward.end.fill")
					}
					.font(.title3)
					.disabled(isPerformingAction)
					.disabled(!(zone?.isPreviousAllowed ?? false))

					if zone?.state == .playing {
						Button {
							Task {
								await performAction(.pause)
							}
						} label: {
							Label("Pause", systemImage: "pause.fill")
						}
						.font(.title)
						.disabled(isPerformingAction)
						.disabled(!(zone?.isPauseAllowed ?? false))
					} else {
						Button {
							Task {
								await performAction(.play)
							}
						} label: {
							Label("Play", systemImage: "play.fill")
						}
						.font(.title)
						.disabled(isPerformingAction)
						.disabled(!(zone?.isPlayAllowed ?? false))
					}

					Button {
						Task {
							await performAction(.next)
						}
					} label: {
						Label("Next", systemImage: "forward.end.fill")
					}
					.font(.title3)
					.disabled(isPerformingAction)
					.disabled(!(zone?.isNextAllowed ?? false))
				}
				.labelStyle(.iconOnly)
				.buttonStyle(.borderless)

				Spacer()

				if model.zones.count > 0 && zone != nil {
					@Bindable var model = model
					Picker("Zone", selection: $model.zone) {
						ForEach(
							model.zones.values.sorted(by: {
								$0.id < $1.id
							})
						) { (zone: TransportService.Zone) in
							Text(zone.displayName).tag(zone)
						}
					}
					.scaledToFit()
				}
			}
		}
		.padding([.horizontal], 12)
		.padding([.vertical], 10)
	}

	private func performAction(_ action: TransportService.ControlAction) async {
		guard let zone = zone else {
			return
		}

		isPerformingAction = true

		do {
			let msg = try await model.conn.request(
				try Moo(control: .init(zoneID: zone.id, control: action)),
				timeout: .seconds(5)
			)

			_ = try TransportService.ControlResponse(msg)
		} catch {
			Logger().warning("Failed to send control message: \(error)")
		}

		isPerformingAction = false
	}
}