import SwiftUI
import AppIntents

struct MusicActivityCard: View {
    let state: MusicActivityAttributes.ContentState
    let stale: Bool
    var activityID: String = ""
    var body: some View {
        VStack(alignment: .leading, spacing: 10) {
            HStack(spacing: 12) {
                Image(systemName: "waveform").font(.title).foregroundStyle(.indigo)
                TrackLabels(state: state)
                Spacer(minLength: 0)
                Image(systemName: state.playing ? "play.fill" : "pause.fill")
                    .accessibilityLabel("Последнее состояние: " + (state.playing ? "воспроизведение" : "пауза"))
            }
            ProgressView(value: state.progress).tint(.indigo)
            ActivityStatus(state: state, stale: stale)
            MusicActivityControls(activityID: activityID)
        }.padding(16)
    }
}

struct TrackLabels: View {
    let state: MusicActivityAttributes.ContentState
    var body: some View {
        VStack(alignment: .leading, spacing: 3) {
            Text(state.title).font(.headline).lineLimit(1)
            Text(state.artist.isEmpty ? "MusicBridge · музыка на ПК" : state.artist)
                .font(.caption).foregroundStyle(.secondary).lineLimit(1)
        }
    }
}

struct ActivityStatus: View {
    let state: MusicActivityAttributes.ContentState
    let stale: Bool
    var body: some View {
        if let message = state.message {
            Text(message).font(.caption).lineLimit(2)
        } else if !state.connected {
            Text("Нет связи с ПК · нажмите обновление").font(.caption).foregroundStyle(.secondary)
        } else {
            HStack(spacing: 4) {
                Text("Обновлено в")
                Text(state.updatedAt, style: .time)
            }.font(.caption).foregroundStyle(.secondary)
        }
    }
}

struct MusicActivityControls: View {
    let activityID: String
    var body: some View {
        HStack {
            control(.previous, icon: "backward.end.fill", label: "Предыдущий трек")
            Spacer(minLength: 4)
            control(.toggle, icon: "playpause.fill", label: "Воспроизведение или пауза")
            Spacer(minLength: 4)
            control(.next, icon: "forward.end.fill", label: "Следующий трек")
            Spacer(minLength: 4)
            control(.refresh, icon: "arrow.clockwise", label: "Обновить трек")
        }
    }
    private func control(_ action: MusicRemoteAction, icon: String, label: String) -> some View {
        Button(intent: MusicControlIntent(action, activityID: activityID)) {
            Image(systemName: icon).font(.title3).frame(minWidth: 44, minHeight: 44)
        }.buttonStyle(.plain).accessibilityLabel(label).disabled(activityID.isEmpty)
    }
}