import SwiftUI
import AVKit
import AVFoundation
import UIKit
import Combine
import ShazamKit
import MusicKit

// MARK: - Album Art Color Extractor
class AlbumColorExtractor: ObservableObject {
    static let shared = AlbumColorExtractor()
    
    @Published var primaryColor: Color = .pink
    @Published var secondaryColor: Color = .blue
    @Published var isLoaded = false
    @Published var currentImage: UIImage?
    
    private var lastCoverArtId: String?
    private var coverStoreObserver: AnyCancellable?
    
    private init() {
        // Re-extract colors when custom album cover changes
        coverStoreObserver = AlbumCoverStore.shared.$updateTrigger
            .dropFirst()
            .sink { [weak self] _ in
                guard let self = self, let id = self.lastCoverArtId else { return }
                self.lastCoverArtId = nil // force re-extract
                self.extract(from: id)
            }
    }
    
    func extract(from coverArtId: String?) {
        guard let id = coverArtId, id != lastCoverArtId else { return }
        lastCoverArtId = id
        
        // Check user-set custom cover first
        if let customImage = AlbumCoverStore.shared.loadCover(for: id) {
            let colors = Self.dominantColors(from: customImage)
            self.primaryColor = colors.0
            self.secondaryColor = colors.1
            self.currentImage = customImage
            self.isLoaded = true
            return
        }
        
        guard let url = ServerManager.shared.client.coverArtURL(id: id, size: 100) else { return }
        
        // Check cache
        if let cached = ImageCache.shared.cachedImage(for: url) {
            let colors = Self.dominantColors(from: cached)
            self.primaryColor = colors.0
            self.secondaryColor = colors.1
            self.currentImage = cached
            self.isLoaded = true
            return
        }
        
        Task {
            do {
                let (data, _) = try await URLSession.shared.data(from: url)
                guard let image = UIImage(data: data) else { return }
                ImageCache.shared.store(image, for: url)
                let colors = Self.dominantColors(from: image)
                await MainActor.run {
                    withAnimation(.easeInOut(duration: 1.0)) {
                        self.primaryColor = colors.0
                        self.secondaryColor = colors.1
                        self.currentImage = image
                        self.isLoaded = true
                    }
                }
            } catch { }
        }
    }
    
    static func dominantColors(from image: UIImage) -> (Color, Color) {
        guard let cgImage = image.cgImage else { return (.pink, .blue) }
        
        let width = min(cgImage.width, 50)
        let height = min(cgImage.height, 50)
        let bytesPerPixel = 4
        let bytesPerRow = width * bytesPerPixel
        var pixelData = [UInt8](repeating: 0, count: width * height * bytesPerPixel)
        
        guard let context = CGContext(
            data: &pixelData,
            width: width,
            height: height,
            bitsPerComponent: 8,
            bytesPerRow: bytesPerRow,
            space: CGColorSpaceCreateDeviceRGB(),
            bitmapInfo: CGImageAlphaInfo.premultipliedLast.rawValue
        ) else { return (.pink, .blue) }
        
        context.draw(cgImage, in: CGRect(x: 0, y: 0, width: width, height: height))
        
        // Sample pixels and bucket by hue
        var colorBuckets: [(r: CGFloat, g: CGFloat, b: CGFloat, count: Int)] = Array(repeating: (0, 0, 0, 0), count: 12)
        
        let totalPixels = width * height
        let step = max(1, totalPixels / 200) // sample ~200 pixels
        
        for i in stride(from: 0, to: totalPixels, by: step) {
            let offset = i * bytesPerPixel
            let r = CGFloat(pixelData[offset]) / 255.0
            let g = CGFloat(pixelData[offset + 1]) / 255.0
            let b = CGFloat(pixelData[offset + 2]) / 255.0
            
            // Skip very dark or very light pixels
            let brightness = (r + g + b) / 3.0
            if brightness < 0.1 || brightness > 0.9 { continue }
            
            // Skip low saturation (grayish)
            let maxC = max(r, g, b)
            let minC = min(r, g, b)
            let saturation = maxC > 0 ? (maxC - minC) / maxC : 0
            if saturation < 0.15 { continue }
            
            // Bucket by hue (12 buckets = 30° each)
            var hue: CGFloat = 0
            if maxC == minC {
                hue = 0
            } else if maxC == r {
                hue = (g - b) / (maxC - minC)
                if hue < 0 { hue += 6 }
            } else if maxC == g {
                hue = 2 + (b - r) / (maxC - minC)
            } else {
                hue = 4 + (r - g) / (maxC - minC)
            }
            let bucket = Int(hue / 6.0 * 12.0) % 12
            
            colorBuckets[bucket].r += r
            colorBuckets[bucket].g += g
            colorBuckets[bucket].b += b
            colorBuckets[bucket].count += 1
        }
        
        // Sort buckets by count, pick top 2
        let sorted = colorBuckets.enumerated()
            .filter { $0.element.count > 0 }
            .sorted { $0.element.count > $1.element.count }
        
        func colorFromBucket(_ b: (r: CGFloat, g: CGFloat, b: CGFloat, count: Int)) -> Color {
            let c = CGFloat(b.count)
            return Color(red: b.r / c, green: b.g / c, blue: b.b / c)
        }
        
        let primary = sorted.count > 0 ? colorFromBucket(sorted[0].element) : Color.pink
        // Pick secondary that's at least 2 buckets away from primary for contrast
        var secondary = Color.blue
        if sorted.count > 1 {
            let primaryIdx = sorted[0].offset
            for s in sorted.dropFirst() {
                let dist = min(abs(s.offset - primaryIdx), 12 - abs(s.offset - primaryIdx))
                if dist >= 2 {
                    secondary = colorFromBucket(s.element)
                    break
                }
            }
            if secondary == .blue && sorted.count > 1 {
                secondary = colorFromBucket(sorted[1].element)
            }
        }
        
        return (primary, secondary)
    }
}

// MARK: - Now Playing View (landscape-adaptive)
struct NowPlayingView: View {
    @EnvironmentObject var audioPlayer: AudioPlayer
    @EnvironmentObject var serverManager: ServerManager
    @EnvironmentObject var offlineManager: OfflineManager
    @Binding var isPresented: Bool
    
    @State private var isDraggingSlider = false
    @State private var dragPosition: Double = 0
    @State private var showQueue = false
    @State private var showVisualizerSettings = false
    @State private var showPlaylistPicker = false
    @State private var showGetInfo = false
    @State private var showTrackEditor = false
    @State private var showEllipsisMenu = false
    @State private var isStarred = false
    @State private var availablePlaylists: [Playlist] = []
    @State private var isRecording = false
    @State private var shazamResult: String?
    @State private var shazamArtworkURL: URL?
    @State private var shazamPreviewURL: URL?
    @State private var isShazaming = false
    @State private var showShazamResult = false
    @StateObject private var albumColors = AlbumColorExtractor.shared
    @StateObject private var radioBuffer = RadioStreamBuffer.shared
    @ObservedObject private var visSettings = VisualizerSettings.shared
    
    @State private var dragOffset: CGFloat = 0
    
    // Local time polling — avoids @Published currentTime triggering global redraws
    @State private var playbackTime: TimeInterval = 0
    @State private var playbackDuration: TimeInterval = 0
    private let timePoller = Timer.publish(every: 0.1, on: .main, in: .common).autoconnect()
    
    @Environment(\.horizontalSizeClass) private var hSizeClass
    @Environment(\.verticalSizeClass) private var vSizeClass
    
    private let accentPink = Color(red: 1.0, green: 0.176, blue: 0.333)
    
    private var isLandscape: Bool {
        vSizeClass == .compact
    }
    
    /// Whether the current song is a radio stream
    private var isRadio: Bool {
        audioPlayer.isRadioStream || audioPlayer.currentSong?.album == "Radio"
    }
    
    var body: some View {
        GeometryReader { screenGeo in
        ZStack {
            // Visualizer behind content (portrait) — extends to edges
            if !isLandscape && visSettings.enabled && visSettings.nowPlayingEnabled {
                VStack {
                    Spacer()
                    MitsuhaVisualizerView(
                        isPlaying: audioPlayer.isPlaying,
                        accentColor: accentPink
                    )
                    .frame(height: screenGeo.size.height * visSettings.nowPlayingHeightPct)
                    .allowsHitTesting(false)
                }
                .ignoresSafeArea()
            }
            
            // Visualizer behind content (landscape) — extends to edges
            if isLandscape && visSettings.enabled && visSettings.nowPlayingEnabled {
                VStack(spacing: 0) {
                    Spacer()
                    MitsuhaVisualizerView(
                        isPlaying: audioPlayer.isPlaying,
                        accentColor: accentPink
                    )
                    .frame(maxWidth: .infinity)
                    .frame(height: screenGeo.size.height * min(visSettings.nowPlayingHeightPct + 0.1, 0.7))
                    .allowsHitTesting(false)
                }
                .ignoresSafeArea()
            }
            
            if isLandscape {
                landscapeLayout
            } else {
                portraitLayout
            }
        }
        } // end GeometryReader
        .background { backgroundGradient }
        .offset(y: dragOffset)
        .gesture(
            DragGesture(minimumDistance: 30, coordinateSpace: .local)
                .onChanged { value in
                    let isVertical = abs(value.translation.height) > abs(value.translation.width)
                    if value.translation.height > 0 && isVertical {
                        dragOffset = value.translation.height
                    }
                }
                .onEnded { value in
                    if value.translation.height > 120 || value.velocity.height > 800 {
                        // Dismiss — the parent ZStack transition handles the slide-out
                        withAnimation(.easeInOut(duration: 0.35)) {
                            dragOffset = 0
                            isPresented = false
                        }
                    } else {
                        withAnimation(.spring(response: 0.3, dampingFraction: 0.8)) {
                            dragOffset = 0
                        }
                    }
                }
        )
        .preferredColorScheme(.dark)
        .sheet(isPresented: $showQueue) {
            if isRadio {
                RadioRecordingsView(stationName: audioPlayer.currentSong?.title ?? "Radio")
            } else {
                QueueView()
            }
        }
        .sheet(isPresented: $showVisualizerSettings) { VisualizerSettingsView() }
        .sheet(isPresented: $showGetInfo) {
            if let song = audioPlayer.currentSong {
                SongInfoSheet(song: song)
            }
        }
        .sheet(isPresented: $showPlaylistPicker) {
            AddToPlaylistSheet(
                songId: audioPlayer.currentSong?.id,
                playlists: availablePlaylists
            )
        }
        .sheet(isPresented: $showTrackEditor) {
            if let song = audioPlayer.currentSong {
                TrackEditorView(song: song)
            }
        }
        .sheet(isPresented: $showShazamResult) {
            ShazamResultSheet(
                title: shazamResult ?? "",
                artworkURL: shazamArtworkURL,
                previewURL: shazamPreviewURL
            )
            .presentationDetents([.medium])
        }
        .sheet(isPresented: $showEllipsisMenu) {
            ellipsisActionsSheet
                .presentationDetents([.medium, .large])
        }
        .onAppear {
            dragOffset = 0
            isStarred = audioPlayer.currentSong?.starred != nil
            albumColors.extract(from: audioPlayer.currentSong?.coverArt)
        }
        .onChange(of: audioPlayer.currentSong?.id) { _, _ in
            isStarred = audioPlayer.currentSong?.starred != nil
            albumColors.extract(from: audioPlayer.currentSong?.coverArt)
        }
        .onChange(of: audioPlayer.currentSong?.starred) { _, newVal in
            isStarred = newVal != nil
        }
        .onReceive(timePoller) { _ in
            playbackTime = audioPlayer.currentTime
            playbackDuration = audioPlayer.duration
        }
    }
    
    // MARK: - Portrait Layout
    
    private var portraitLayout: some View {
        VStack(spacing: 0) {
            topBar
            Spacer()
            albumArt(size: 300)
            Spacer()
            songInfo
            progressBar.padding(.top, 16)
            transportControls.padding(.top, 20)
            bottomControls.padding(.top, 12).padding(.bottom, 30)
        }
    }
    
    // MARK: - Landscape Layout
    
    private var landscapeLayout: some View {
        GeometryReader { geo in
            HStack(spacing: 0) {
                // Left: Album art centered
                VStack {
                    Spacer()
                    albumArt(size: min(200, geo.size.height - 40))
                    Spacer()
                }
                .frame(width: geo.size.width * 0.4)
                
                // Right: Controls — padded below Dynamic Island
                VStack(spacing: 6) {
                    HStack {
                        Button(action: {
                            withAnimation(.easeInOut(duration: 0.35)) {
                                isPresented = false
                            }
                        }) {
                            Image(systemName: "chevron.down")
                                .font(.system(size: 16, weight: .semibold))
                                .foregroundColor(.white)
                        }
                        Spacer()
                        ellipsisMenu
                    }
                    .padding(.horizontal, 16)
                    
                    songInfo
                    progressBar.padding(.top, 6)
                    transportControls.padding(.top, 8)
                    bottomControls.padding(.top, 4).padding(.bottom, 8)
                }
                .frame(width: geo.size.width * 0.6)
            }
        }
    }
    
    // MARK: - Background
    
    private var backgroundGradient: some View {
        ZStack {
            // Layer 1: Deep black base
            Color.black.ignoresSafeArea()
            
            // Layer 2: Blurred album art mist — must be clipped to prevent layout overflow
            if let art = albumColors.currentImage {
                GeometryReader { geo in
                    Image(uiImage: art)
                        .resizable()
                        .aspectRatio(contentMode: .fill)
                        .frame(width: geo.size.width, height: geo.size.height)
                        .clipped()
                        .blur(radius: 85, opaque: true)
                        .opacity(0.5)
                }
                .ignoresSafeArea()
            }
            
            // Layer 3: Radial vignette from dominant color
            RadialGradient(
                gradient: Gradient(colors: [
                    albumColors.primaryColor.opacity(0.4),
                    Color.black.opacity(0.85)
                ]),
                center: .center,
                startRadius: 80,
                endRadius: 500
            )
            .ignoresSafeArea()
        }
    }
    
    // MARK: - Top Bar (portrait only)
    
    private var topBar: some View {
        HStack {
            Button(action: {
                withAnimation(.easeInOut(duration: 0.35)) {
                    isPresented = false
                }
            }) {
                Image(systemName: "chevron.down")
                    .font(.system(size: 18, weight: .semibold))
                    .foregroundColor(.white)
            }
            .frame(width: 44, height: 44)
            
            Spacer()
            
            VStack(spacing: 2) {
                Text("PLAYING FROM")
                    .font(.system(size: 10, weight: .semibold))
                    .foregroundColor(.gray)
                    .tracking(1)
                Text(audioPlayer.currentSong?.album ?? "")
                    .font(.system(size: 13, weight: .medium))
                    .foregroundColor(.white)
                    .lineLimit(1)
            }
            .onTapGesture {
                if let albumId = audioPlayer.currentSong?.albumId {
                    NotificationCenter.default.post(
                        name: .navigateToAlbum,
                        object: nil,
                        userInfo: ["albumId": albumId]
                    )
                }
            }
            
            Spacer()
            
            ellipsisMenu
        }
        .padding(.horizontal, 8)
        .padding(.top, 8)
    }
    
    private var ellipsisMenu: some View {
        Button(action: { showEllipsisMenu = true }) {
            Image(systemName: "ellipsis")
                .font(.system(size: 18))
                .foregroundColor(.white)
                .frame(width: 44, height: 44)
                .contentShape(Rectangle())
        }
    }
    
    /// Actions sheet — replaces Menu to avoid UIContextMenuInteraction conflicts
    /// with the drag-to-dismiss gesture. Uses a custom sheet instead of confirmationDialog
    /// so we can show icons and dividers.
    private var ellipsisActionsSheet: some View {
        NavigationStack {
            List {
                if !isRadio {
                    Section {
                        sheetButton("Instant Mix", icon: "wand.and.stars") {
                            showEllipsisMenu = false
                            if let song = audioPlayer.currentSong {
                                audioPlayer.playInstantMix(basedOn: song)
                            }
                        }
                        sheetButton("Add to Playlist...", icon: "text.badge.plus") {
                            showEllipsisMenu = false
                            Task {
                                availablePlaylists = (try? await serverManager.client.getPlaylists()) ?? []
                                showPlaylistPicker = true
                            }
                        }
                    }
                    
                    Section {
                        if audioPlayer.currentSong?.albumId != nil {
                            sheetButton("Go to Album", icon: "square.stack") {
                                showEllipsisMenu = false
                                if let albumId = audioPlayer.currentSong?.albumId {
                                    NotificationCenter.default.post(
                                        name: .navigateToAlbum, object: nil,
                                        userInfo: ["albumId": albumId]
                                    )
                                }
                            }
                        }
                        if audioPlayer.currentSong?.artistId != nil {
                            sheetButton("Go to Artist", icon: "music.mic") {
                                showEllipsisMenu = false
                                if let artistId = audioPlayer.currentSong?.artistId {
                                    NotificationCenter.default.post(
                                        name: .navigateToArtist, object: nil,
                                        userInfo: ["artistId": artistId]
                                    )
                                }
                            }
                        }
                        if let pid = audioPlayer.sourcePlaylistId,
                           let pname = audioPlayer.sourcePlaylistName {
                            sheetButton("Show in \(pname)", icon: "music.note.list") {
                                showEllipsisMenu = false
                                withAnimation(.easeInOut(duration: 0.35)) { isPresented = false }
                                DispatchQueue.main.asyncAfter(deadline: .now() + 0.3) {
                                    NotificationCenter.default.post(
                                        name: .navigateToPlaylist, object: nil,
                                        userInfo: ["playlistId": pid]
                                    )
                                }
                            }
                        }
                    }
                    
                    if let song = audioPlayer.currentSong {
                        Section {
                            if offlineManager.isSongDownloaded(song.id) {
                                sheetButton("Remove Download", icon: "trash", role: .destructive) {
                                    showEllipsisMenu = false
                                    offlineManager.removeSong(song.id)
                                }
                                if WatchConnectivityManager.shared.isWatchAvailable {
                                    sheetButton("Send to Watch", icon: "applewatch.and.arrow.forward") {
                                        showEllipsisMenu = false
                                        _ = WatchConnectivityManager.shared.sendSongToWatch(song)
                                    }
                                }
                            } else {
                                sheetButton("Download", icon: "arrow.down.circle") {
                                    showEllipsisMenu = false
                                    if let server = serverManager.activeServer {
                                        offlineManager.downloadSong(song, server: server)
                                    }
                                }
                            }
                        }
                    }
                }
                
                Section {
                    sheetButton("Get Info", icon: "info.circle") {
                        showEllipsisMenu = false
                        showGetInfo = true
                    }
                    
                    if CompanionSettings.shared.isEnabled {
                        sheetButton("Edit Tags", icon: "tag") {
                            showEllipsisMenu = false
                            showTrackEditor = true
                        }
                    }
                    
                    sheetButton("Visualizer Settings", icon: "waveform") {
                        showEllipsisMenu = false
                        showVisualizerSettings = true
                    }
                }
            }
            .listStyle(.insetGrouped)
            .navigationTitle("Options")
            .navigationBarTitleDisplayMode(.inline)
            .toolbar {
                ToolbarItem(placement: .navigationBarTrailing) {
                    Button("Done") { showEllipsisMenu = false }
                        .foregroundColor(accentPink)
                }
            }
        }
    }
    
    private func sheetButton(_ title: String, icon: String, role: ButtonRole? = nil, action: @escaping () -> Void) -> some View {
        Button(role: role, action: action) {
            Label(title, systemImage: icon)
        }
    }
    
    // MARK: - Album Art
    
    private func albumArt(size: CGFloat) -> some View {
        Group {
            if let song = audioPlayer.currentSong,
               song.album == "Radio",
               let img = RadioCoverStore.shared.loadCover(for: song.id) {
                Image(uiImage: img)
                    .resizable()
                    .aspectRatio(contentMode: .fill)
            } else {
                AsyncCoverArt(coverArtId: audioPlayer.currentSong?.coverArt, size: Int(size) * 2)
            }
        }
        .frame(width: size, height: size)
        .cornerRadius(8)
        .shadow(color: .black.opacity(0.5), radius: 20, y: 10)
    }
    
    // MARK: - Song Info
    
    private var songInfo: some View {
        HStack {
            VStack(alignment: .leading, spacing: 4) {
                Text(audioPlayer.currentSong?.title ?? "Not Playing")
                    .font(.system(size: isLandscape ? 16 : 20, weight: .bold))
                    .foregroundColor(.white)
                    .lineLimit(1)
                Text(audioPlayer.currentSong?.artist ?? "")
                    .font(.system(size: isLandscape ? 13 : 16))
                    .foregroundColor(accentPink)
                    .lineLimit(1)
                    .onTapGesture {
                        if let artistId = audioPlayer.currentSong?.artistId {
                            NotificationCenter.default.post(
                                name: .navigateToArtist,
                                object: nil,
                                userInfo: ["artistId": artistId]
                            )
                        }
                    }
                
                // Show Shazam result if available
                if let result = shazamResult {
                    Text(result)
                        .font(.system(size: isLandscape ? 11 : 13))
                        .foregroundColor(.white.opacity(0.7))
                        .lineLimit(2)
                        .transition(.opacity)
                }
            }
            Spacer()
            
            if !isRadio {
                // Heart/star for regular music
                Button(action: toggleStar) {
                    Image(systemName: isStarred ? "heart.fill" : "heart")
                        .font(.system(size: isLandscape ? 18 : 22))
                        .foregroundColor(isStarred ? accentPink : .gray)
                }
            }
        }
        .padding(.horizontal, isLandscape ? 20 : 30)
    }
    
    // MARK: - Progress Bar
    
    private var progressBar: some View {
        VStack(spacing: 6) {
            if isRadio {
                // Radio always shows LIVE indicator, buffer bar when available
                radioProgressBar
            } else {
                // Normal song progress bar
                normalProgressBar
            }
        }
        .padding(.horizontal, isLandscape ? 20 : 30)
    }
    
    private var normalProgressBar: some View {
        VStack(spacing: 6) {
            SiriSeekBar(
                value: Binding(
                    get: {
                        guard playbackDuration > 0 else { return 0 }
                        return playbackTime / playbackDuration
                    },
                    set: { _ in }
                ),
                onSeek: { pct in
                    isDraggingSlider = false
                    audioPlayer.seekToPercent(pct)
                },
                onDragChanged: { pct in
                    isDraggingSlider = true
                    dragPosition = pct
                }
            )
            
            HStack {
                Text(formatTime(isDraggingSlider ? playbackDuration * dragPosition : playbackTime))
                    .font(.system(size: 11)).foregroundColor(.gray)
                Spacer()
                Text("-" + formatTime(playbackDuration - (isDraggingSlider ? playbackDuration * dragPosition : playbackTime)))
                    .font(.system(size: 11)).foregroundColor(.gray)
            }
        }
    }
    
    private var radioProgressBar: some View {
        VStack(spacing: 6) {
            if radioBuffer.isHLSStream || !radioBuffer.isBuffering {
                // HLS or no buffer — static thin bar, no seek
                Capsule().fill(Color.white.opacity(0.15)).frame(height: 4)
            } else {
                // Buffered radio — scrubbable seek bar
                GeometryReader { geo in
                    let bufferSec = radioBuffer.estimatedBufferSeconds
                    let maxSec = radioBuffer.maxBufferDuration
                    let fillPct = min(bufferSec / maxSec, 1.0)
                    
                    ZStack(alignment: .leading) {
                        Capsule().fill(Color.white.opacity(0.15)).frame(height: 4)
                        Capsule().fill(accentPink.opacity(0.35))
                            .frame(width: geo.size.width * fillPct, height: 4)
                        
                        if isDraggingSlider {
                            Circle().fill(Color.white)
                                .frame(width: 14, height: 14)
                                .offset(x: geo.size.width * dragPosition - 7)
                        }
                    }
                    .contentShape(Rectangle())
                    .gesture(
                        DragGesture(minimumDistance: 0)
                            .onChanged { v in
                                isDraggingSlider = true
                                let pct = min(max(v.location.x / geo.size.width, 0), fillPct)
                                dragPosition = pct
                            }
                            .onEnded { v in
                                isDraggingSlider = false
                                let pct = min(max(v.location.x / geo.size.width, 0), fillPct)
                                let seekTime = maxSec * pct
                                audioPlayer.radioSeekBack(to: seekTime)
                            }
                    )
                }
                .frame(height: 14)
                
                // Time labels
                HStack {
                    if isDraggingSlider {
                        let scrubTime = radioBuffer.maxBufferDuration * dragPosition
                        Text(formatTime(scrubTime))
                            .font(.system(size: 11)).foregroundColor(.gray)
                    } else {
                        Text(formatTime(radioBuffer.bufferedDuration))
                            .font(.system(size: 11)).foregroundColor(.gray)
                    }
                    Spacer()
                    if !radioBuffer.isLive {
                        // "Back to live" tap on time label
                        Button(action: { audioPlayer.radioGoLive() }) {
                            Text("Go Live")
                                .font(.system(size: 11, weight: .medium))
                                .foregroundColor(accentPink)
                        }
                    }
                }
            }
        }
    }
    
    // MARK: - Transport Controls
    
    private var transportControls: some View {
        let iconSize: CGFloat = isLandscape ? 24 : 30
        let playSize: CGFloat = isLandscape ? 34 : 42
        let isRecordedRadio = isRadio && !audioPlayer.isRadioStream
        let isLiveRadio = isRadio && audioPlayer.isRadioStream
        
        return VStack(spacing: 4) {
            // LIVE indicator above transport — only for live radio streams
            if isLiveRadio {
                liveIndicator
                    .padding(.bottom, 4)
            }
            
            HStack(spacing: 0) {
                Spacer()
                
                if isRecordedRadio {
                    Button(action: {
                        audioPlayer.seek(to: max(0, audioPlayer.currentTime - 5))
                    }) {
                        Image(systemName: "gobackward.5").font(.system(size: iconSize)).foregroundColor(.white)
                    }.frame(width: 60, height: 50)
                } else if !isLiveRadio {
                    Button(action: { audioPlayer.previous() }) {
                        Image(systemName: "backward.fill").font(.system(size: iconSize)).foregroundColor(.white)
                    }.frame(width: 60, height: 50)
                } else {
                    Color.clear.frame(width: 60, height: 50)
                }
                
                Spacer()
                
                Button(action: { audioPlayer.togglePlayPause() }) {
                    Image(systemName: audioPlayer.isPlaying ? "pause.fill" : "play.fill")
                        .font(.system(size: playSize)).foregroundColor(.white)
                }.frame(width: 70, height: 60)
                
                Spacer()
                
                if isRecordedRadio {
                    Button(action: {
                        audioPlayer.seek(to: min(audioPlayer.duration, audioPlayer.currentTime + 5))
                    }) {
                        Image(systemName: "goforward.5").font(.system(size: iconSize)).foregroundColor(.white)
                    }.frame(width: 60, height: 50)
                } else if !isLiveRadio {
                    Button(action: { audioPlayer.next() }) {
                        Image(systemName: "forward.fill").font(.system(size: iconSize)).foregroundColor(.white)
                    }.frame(width: 60, height: 50)
                } else {
                    Color.clear.frame(width: 60, height: 50)
                }
                
                Spacer()
            }
        }
    }
    
    /// Glowing LIVE indicator — red box when buffering active, gray when not
    private var liveIndicator: some View {
        Button(action: {
            if radioBuffer.isBuffering && !radioBuffer.isLive {
                audioPlayer.radioGoLive()
            } else if !radioBuffer.isBuffering {
                if let url = audioPlayer.radioStreamURL {
                    RadioStreamBuffer.shared.startBuffering(
                        url: url,
                        stationName: audioPlayer.currentSong?.title ?? "Radio"
                    )
                }
            }
        }) {
            HStack(spacing: 5) {
                Circle()
                    .fill(radioBuffer.isBuffering ? Color.red : Color.gray.opacity(0.5))
                    .frame(width: 7, height: 7)
                Text("LIVE")
                    .font(.system(size: 12, weight: .bold))
                    .foregroundColor(radioBuffer.isBuffering ? .white : .gray)
            }
            .padding(.horizontal, 14)
            .padding(.vertical, 6)
            .background(
                RoundedRectangle(cornerRadius: 6)
                    .fill(radioBuffer.isBuffering ? Color.red.opacity(0.25) : Color.white.opacity(0.06))
            )
            .overlay(
                RoundedRectangle(cornerRadius: 6)
                    .stroke(radioBuffer.isBuffering ? Color.red.opacity(0.6) : Color.clear, lineWidth: 1)
            )
            .shadow(color: radioBuffer.isBuffering ? Color.red.opacity(0.4) : .clear, radius: 8)
        }
    }
    
    // MARK: - Bottom Controls
    
    private var bottomControls: some View {
        HStack {
            if isRadio {
                // Shazam button
                Button(action: shazamCurrentAudio) {
                    Image(systemName: isShazaming ? "waveform" : "shazam.logo")
                        .font(.system(size: isLandscape ? 14 : 16))
                        .foregroundColor(isShazaming ? accentPink : .gray)
                        .symbolEffect(.pulse, isActive: isShazaming)
                }.frame(width: 40, height: 40)
                
                Spacer()
                
                // Recordings list
                Button(action: { showQueue = true }) {
                    Image(systemName: "recordingtape").font(.system(size: isLandscape ? 14 : 16)).foregroundColor(.gray)
                }.frame(width: 40, height: 40)
                
                Spacer()
                
                AirPlayButton().frame(width: 40, height: 40)
            } else {
                // Normal music controls
                Button(action: { audioPlayer.toggleShuffle() }) {
                    Image(systemName: "shuffle").font(.system(size: isLandscape ? 14 : 16))
                        .foregroundColor(audioPlayer.shuffleEnabled ? accentPink : .gray)
                }.frame(width: 40, height: 40)
                Spacer()
                Button(action: { audioPlayer.cycleRepeat() }) {
                    Image(systemName: audioPlayer.repeatMode == .one ? "repeat.1" : "repeat")
                        .font(.system(size: isLandscape ? 14 : 16))
                        .foregroundColor(audioPlayer.repeatMode != .off ? accentPink : .gray)
                }.frame(width: 40, height: 40)
                Spacer()
                Button(action: { showQueue = true }) {
                    Image(systemName: "list.bullet").font(.system(size: isLandscape ? 14 : 16)).foregroundColor(.gray)
                }.frame(width: 40, height: 40)
                Spacer()
                AirPlayButton().frame(width: 40, height: 40)
            }
        }
        .padding(.horizontal, isLandscape ? 20 : 30)
    }
    
    // MARK: - Helpers
    
    private func formatTime(_ seconds: TimeInterval) -> String {
        let secs = Int(max(0, seconds))
        return String(format: "%d:%02d", secs / 60, secs % 60)
    }
    
    private func toggleStar() {
        guard let song = audioPlayer.currentSong else { return }
        let wasStarred = isStarred
        isStarred.toggle()
        Task {
            do {
                if wasStarred {
                    try await serverManager.client.unstar(id: song.id)
                } else {
                    try await serverManager.client.star(id: song.id)
                }
                // Rebuild song with updated starred field so it persists across dismiss/reopen
                await MainActor.run {
                    let newStarred: String? = wasStarred ? nil : "true"
                    let updated = Song(
                        id: song.id, parent: song.parent, isDir: song.isDir,
                        title: song.title, album: song.album, artist: song.artist,
                        track: song.track, year: song.year, genre: song.genre,
                        coverArt: song.coverArt, size: song.size,
                        contentType: song.contentType, suffix: song.suffix,
                        transcodedContentType: song.transcodedContentType,
                        transcodedSuffix: song.transcodedSuffix,
                        duration: song.duration, bitRate: song.bitRate,
                        path: song.path, playCount: song.playCount,
                        discNumber: song.discNumber, created: song.created,
                        albumId: song.albumId, artistId: song.artistId,
                        type: song.type, starred: newStarred,
                        bpm: song.bpm, musicBrainzId: song.musicBrainzId
                    )
                    audioPlayer.currentSong = updated
                    // Also update in queue
                    if let idx = audioPlayer.queue.firstIndex(where: { $0.id == song.id }) {
                        audioPlayer.queue[idx] = updated
                    }
                }
            } catch {
                await MainActor.run { isStarred = wasStarred }
            }
        }
    }
    
    // MARK: - Shazam
    
    private func shazamCurrentAudio() {
        guard !isShazaming else { return }
        isShazaming = true
        shazamResult = "Listening..."
        shazamArtworkURL = nil
        shazamPreviewURL = nil
        
        ShazamRecognizer.shared.recognize { result in
            DispatchQueue.main.async {
                isShazaming = false
                if let match = result {
                    shazamResult = match.displayText
                    shazamArtworkURL = match.artworkURL
                    shazamPreviewURL = match.previewURL
                    showShazamResult = true
                    
                    // Auto-clear text after 10 seconds
                    DispatchQueue.main.asyncAfter(deadline: .now() + 10) {
                        if shazamResult == match.displayText { shazamResult = nil }
                    }
                } else {
                    shazamResult = "No match found"
                    DispatchQueue.main.asyncAfter(deadline: .now() + 3) {
                        if shazamResult == "No match found" { shazamResult = nil }
                    }
                }
            }
        }
    }
    
    // MARK: - Recording
    
    private func toggleRecording() {
        if isRecording {
            _ = radioBuffer.stopRecording()
            isRecording = false
        } else {
            radioBuffer.startRecording()
            isRecording = true
        }
    }
}

/// AirPlay route picker wrapped in a container UIView to prevent _UIReparentingView warnings.
/// The AVRoutePickerView creates internal subviews that conflict with SwiftUI's UIHostingController
/// hierarchy. Wrapping in a plain UIView keeps the reparenting inside our container.
struct AirPlayButton: UIViewRepresentable {
    func makeUIView(context: Context) -> UIView {
        let container = UIView()
        container.backgroundColor = .clear
        
        let picker = AVRoutePickerView()
        picker.activeTintColor = UIColor(red: 1.0, green: 0.176, blue: 0.333, alpha: 1.0)
        picker.tintColor = .gray
        picker.prioritizesVideoDevices = false
        picker.translatesAutoresizingMaskIntoConstraints = false
        
        container.addSubview(picker)
        NSLayoutConstraint.activate([
            picker.centerXAnchor.constraint(equalTo: container.centerXAnchor),
            picker.centerYAnchor.constraint(equalTo: container.centerYAnchor),
            picker.widthAnchor.constraint(equalTo: container.widthAnchor),
            picker.heightAnchor.constraint(equalTo: container.heightAnchor)
        ])
        
        return container
    }
    func updateUIView(_ uiView: UIView, context: Context) {}
}

// MARK: - Add to Playlist Sheet
struct AddToPlaylistSheet: View {
    let songId: String?
    let playlists: [Playlist]
    @Environment(\.dismiss) private var dismiss
    
    private let accentPink = Color(red: 1.0, green: 0.176, blue: 0.333)
    
    var body: some View {
        NavigationStack {
            List {
                if playlists.isEmpty {
                    Text("No playlists found")
                        .foregroundColor(.gray)
                } else {
                    ForEach(playlists) { playlist in
                        Button(action: { addToPlaylist(playlist) }) {
                            HStack(spacing: 12) {
                                AsyncCoverArt(coverArtId: playlist.coverArt, size: 44)
                                    .frame(width: 44, height: 44)
                                    .cornerRadius(4)
                                
                                VStack(alignment: .leading, spacing: 2) {
                                    Text(playlist.name)
                                        .font(.system(size: 15))
                                        .foregroundColor(.white)
                                    Text("\(playlist.songCount ?? 0) songs")
                                        .font(.system(size: 12))
                                        .foregroundColor(.gray)
                                }
                                
                                Spacer()
                                
                                Image(systemName: "plus.circle")
                                    .foregroundColor(accentPink)
                            }
                        }
                    }
                }
            }
            .navigationTitle("Add to Playlist")
            .navigationBarTitleDisplayMode(.inline)
            .toolbar {
                ToolbarItem(placement: .navigationBarTrailing) {
                    Button("Cancel") { dismiss() }
                        .foregroundColor(accentPink)
                }
            }
        }
    }
    
    private func addToPlaylist(_ playlist: Playlist) {
        guard let songId = songId else { return }
        Task {
            try? await ServerManager.shared.client.updatePlaylist(
                id: playlist.id,
                songIdsToAdd: [songId]
            )
            await MainActor.run { dismiss() }
        }
    }
}

// MARK: - Queue View
struct QueueView: View {
    @EnvironmentObject var audioPlayer: AudioPlayer
    private let accentPink = Color(red: 1.0, green: 0.176, blue: 0.333)
    
    var body: some View {
        NavigationStack {
            List {
                ForEach(Array(audioPlayer.queue.enumerated()), id: \.element.id) { index, song in
                    HStack(spacing: 12) {
                        if index == audioPlayer.queueIndex {
                            Image(systemName: "waveform").font(.system(size: 12))
                                .foregroundColor(accentPink).frame(width: 20)
                        } else {
                            Text("\(index + 1)").font(.system(size: 13))
                                .foregroundColor(.gray).frame(width: 20)
                        }
                        VStack(alignment: .leading, spacing: 2) {
                            Text(song.title).font(.system(size: 15))
                                .foregroundColor(index == audioPlayer.queueIndex ? accentPink : .white)
                            Text(song.artist ?? "").font(.system(size: 12)).foregroundColor(.gray)
                        }
                        Spacer()
                        Text(song.durationFormatted).font(.system(size: 13)).foregroundColor(.gray)
                    }
                    .contentShape(Rectangle())
                    .onTapGesture { audioPlayer.play(song: song, at: index) }
                }
            }
            .navigationTitle("Up Next")
            .navigationBarTitleDisplayMode(.inline)
        }
    }
}

// MARK: - Radio Recordings View
struct RadioRecordingsView: View {
    let stationName: String
    @State private var recordings: [RecordingFile] = []
    @State private var playingURL: URL?
    @Environment(\.dismiss) private var dismiss
    
    private let accentPink = Color(red: 1.0, green: 0.176, blue: 0.333)
    
    struct RecordingFile: Identifiable {
        let id = UUID()
        let url: URL
        let name: String
        let date: Date
        let size: String
        let duration: String
    }
    
    var body: some View {
        NavigationStack {
            Group {
                if recordings.isEmpty {
                    VStack(spacing: 12) {
                        Image(systemName: "recordingtape")
                            .font(.system(size: 36))
                            .foregroundColor(.gray)
                        Text("No recordings yet")
                            .font(.system(size: 16))
                            .foregroundColor(.gray)
                        Text("Tap REC to record this station")
                            .font(.system(size: 13))
                            .foregroundColor(.gray.opacity(0.7))
                    }
                    .frame(maxWidth: .infinity, maxHeight: .infinity)
                } else {
                    List {
                        ForEach(recordings) { rec in
                            HStack(spacing: 12) {
                                Button(action: { playRecording(rec) }) {
                                    Image(systemName: playingURL == rec.url ? "stop.circle.fill" : "play.circle.fill")
                                        .font(.system(size: 28))
                                        .foregroundColor(playingURL == rec.url ? .red : accentPink)
                                }
                                .buttonStyle(.plain)
                                
                                VStack(alignment: .leading, spacing: 3) {
                                    Text(rec.name)
                                        .font(.system(size: 14, weight: .medium))
                                        .foregroundColor(.white)
                                        .lineLimit(1)
                                    HStack(spacing: 8) {
                                        Text(rec.date, style: .date)
                                            .font(.system(size: 11))
                                            .foregroundColor(.gray)
                                        Text(rec.size)
                                            .font(.system(size: 11))
                                            .foregroundColor(.gray)
                                    }
                                }
                                
                                Spacer()
                                
                                // Share button
                                ShareLink(item: rec.url) {
                                    Image(systemName: "square.and.arrow.up")
                                        .font(.system(size: 14))
                                        .foregroundColor(.gray)
                                }
                            }
                            .padding(.vertical, 4)
                        }
                        .onDelete(perform: deleteRecordings)
                    }
                }
            }
            .navigationTitle("Recordings")
            .navigationBarTitleDisplayMode(.inline)
            .toolbar {
                ToolbarItem(placement: .navigationBarTrailing) {
                    Button("Done") { dismiss() }
                        .foregroundColor(accentPink)
                }
            }
            .onAppear { loadRecordings() }
        }
    }
    
    private func loadRecordings() {
        let fm = FileManager.default
        let docs = fm.urls(for: .documentDirectory, in: .userDomainMask).first!
        let dir = docs.appendingPathComponent("RadioRecordings", isDirectory: true)
        
        guard let files = try? fm.contentsOfDirectory(at: dir, includingPropertiesForKeys: [.fileSizeKey, .contentModificationDateKey]) else {
            return
        }
        
        let safeName = stationName.replacingOccurrences(of: "/", with: "-")
        
        recordings = files
            .filter { $0.lastPathComponent.hasPrefix(safeName) || stationName == "Radio" }
            .compactMap { url in
                guard let attrs = try? url.resourceValues(forKeys: [.fileSizeKey, .contentModificationDateKey]),
                      let date = attrs.contentModificationDate,
                      let size = attrs.fileSize else { return nil }
                
                let sizeStr = ByteCountFormatter.string(fromByteCount: Int64(size), countStyle: .file)
                let name = url.deletingPathExtension().lastPathComponent
                
                return RecordingFile(url: url, name: name, date: date, size: sizeStr, duration: "")
            }
            .sorted { $0.date > $1.date }
    }
    
    private func playRecording(_ rec: RecordingFile) {
        if playingURL == rec.url {
            AudioPlayer.shared.stop()
            playingURL = nil
        } else {
            let song = Song(
                id: rec.id.uuidString, parent: nil, isDir: nil,
                title: rec.name, album: "Recording",
                artist: stationName,
                track: nil, year: nil, genre: nil, coverArt: nil,
                size: nil, contentType: nil, suffix: nil,
                transcodedContentType: nil, transcodedSuffix: nil,
                duration: 0, bitRate: nil, path: nil, playCount: nil,
                discNumber: nil, created: nil, albumId: nil, artistId: nil,
                type: nil, starred: nil, bpm: nil, musicBrainzId: nil
            )
            AudioPlayer.shared.playRadio(song: song, streamURL: rec.url)
            playingURL = rec.url
        }
    }
    
    private func deleteRecordings(at offsets: IndexSet) {
        for idx in offsets {
            try? FileManager.default.removeItem(at: recordings[idx].url)
        }
        recordings.remove(atOffsets: offsets)
    }
}

// MARK: - Rounded Corner Shape Helper
struct RoundedCornerShape: Shape {
    let corners: UIRectCorner
    let radius: CGFloat
    func path(in rect: CGRect) -> Path {
        Path(UIBezierPath(roundedRect: rect, byRoundingCorners: corners,
                          cornerRadii: CGSize(width: radius, height: radius)).cgPath)
    }
}

// MARK: - Shazam Match Result
// MARK: - Shazam Match Result
struct ShazamMatch {
    let title: String
    let artist: String
    let artworkURL: URL?
    let previewURL: URL?
    let appleMusicURL: URL?
    
    var displayText: String {
        artist.isEmpty ? title : "\(title) — \(artist)"
    }
}

// MARK: - Shazam Recognizer
/// Uses ShazamKit + AVAudioEngine mic tap for audio recognition.

class ShazamRecognizer: NSObject, ObservableObject, SHSessionDelegate {
    static let shared = ShazamRecognizer()
    
    @Published var isRecognizing = false
    
    private var session: SHSession?
    private var audioEngine: AVAudioEngine?
    private var completion: ((ShazamMatch?) -> Void)?
    private var timeoutTask: Task<Void, Never>?
    private var hasDeliveredResult = false
    
    private override init() { super.init() }
    
    /// Start recognition via microphone using matchStreamingBuffer
    func recognize(completion: @escaping (ShazamMatch?) -> Void) {
        guard !isRecognizing else { return }
        stopListening()
        
        isRecognizing = true
        hasDeliveredResult = false
        self.completion = completion
        
        DebugLogger.shared.log("Shazam: starting recognition", category: "Audio")
        
        // Configure audio session for simultaneous playback + mic
        do {
            let audioSession = AVAudioSession.sharedInstance()
            try audioSession.setCategory(.playAndRecord, mode: .default, options: [
                .defaultToSpeaker, .allowBluetoothA2DP, .mixWithOthers
            ])
            try audioSession.setActive(true)
        } catch {
            DebugLogger.shared.log("Shazam: audio session failed: \(error.localizedDescription)", category: "Audio")
            deliverResult(nil)
            return
        }
        
        // Create SHSession for Shazam catalog matching
        let shSession = SHSession()
        shSession.delegate = self
        session = shSession
        
        // Dedicated audio engine for mic capture
        let engine = AVAudioEngine()
        audioEngine = engine
        
        let inputNode = engine.inputNode
        let bus: AVAudioNodeBus = 0
        let nativeFormat = inputNode.outputFormat(forBus: bus)
        
        guard nativeFormat.sampleRate > 0, nativeFormat.channelCount > 0 else {
            DebugLogger.shared.log("Shazam: invalid mic format (sr=\(nativeFormat.sampleRate))", category: "Audio")
            deliverResult(nil)
            return
        }
        
        DebugLogger.shared.log("Shazam: mic \(Int(nativeFormat.sampleRate))Hz, \(nativeFormat.channelCount)ch", category: "Audio")
        
        // Install tap — feed buffers directly to matchStreamingBuffer
        // Per Apple docs: "Use matchStreamingBuffer when you are generating
        // the audio buffers and passing them into the framework."
        // This is simpler and more reliable than manual SHSignatureGenerator.
        inputNode.installTap(onBus: bus, bufferSize: 2048, format: nativeFormat) { [weak shSession] buffer, time in
            shSession?.matchStreamingBuffer(buffer, at: time)
        }
        
        do {
            engine.prepare()
            try engine.start()
            DebugLogger.shared.log("Shazam: engine started, listening...", category: "Audio")
        } catch {
            DebugLogger.shared.log("Shazam: engine start failed: \(error.localizedDescription)", category: "Audio")
            deliverResult(nil)
            return
        }
        
        // Timeout after 12 seconds if no match
        timeoutTask = Task { @MainActor in
            try? await Task.sleep(for: .seconds(12))
            if !self.hasDeliveredResult {
                DebugLogger.shared.log("Shazam: timeout — no match after 12s", category: "Audio")
                self.deliverResult(nil)
            }
        }
    }
    
    // MARK: - SHSessionDelegate
    
    func session(_ session: SHSession, didFind match: SHMatch) {
        guard let item = match.mediaItems.first else { return }
        let title = item.title ?? "Unknown"
        let artist = item.artist ?? ""
        let artworkURL = item.artworkURL
        let appleMusicURL = item.appleMusicURL
        
        DebugLogger.shared.log("Shazam: matched '\(title)' by '\(artist)'", category: "Audio")
        
        // Extract preview URL from SHMediaItem.songs MusicKit bridge.
        // SHMediaItem.songs returns MusicKit Song objects directly.
        // Song.previewAssets contains the 30s DRM-free preview URL.
        var previewURL: URL? = nil
        if let firstSong = item.songs.first,
           let preview = firstSong.previewAssets?.first {
            previewURL = preview.url
            DebugLogger.shared.log("Shazam: preview URL from songs bridge", category: "Audio")
        }
        
        DispatchQueue.main.async {
            let result = ShazamMatch(
                title: title,
                artist: artist,
                artworkURL: artworkURL,
                previewURL: previewURL,
                appleMusicURL: appleMusicURL
            )
            self.deliverResult(result)
        }
    }
    
    func session(_ session: SHSession, didNotFindMatchFor signature: SHSignature, error: (any Error)?) {
        // matchStreamingBuffer keeps trying automatically — don't stop here.
        // The timeout task handles giving up.
        if let error = error {
            DebugLogger.shared.log("Shazam: segment no match — \(error.localizedDescription)", category: "Audio")
        }
    }
    
    // MARK: - Cleanup
    
    private func deliverResult(_ result: ShazamMatch?) {
        guard !hasDeliveredResult else { return }
        hasDeliveredResult = true
        stopListening()
        isRecognizing = false
        completion?(result)
        completion = nil
    }
    
    private func stopListening() {
        timeoutTask?.cancel()
        timeoutTask = nil
        
        if let engine = audioEngine {
            engine.inputNode.removeTap(onBus: 0)
            engine.stop()
            audioEngine = nil
        }
        session = nil
        
        // Restore playback audio session
        do {
            try AVAudioSession.sharedInstance().setCategory(.playback, mode: .default, options: [])
            try AVAudioSession.sharedInstance().setActive(true)
        } catch {
            DebugLogger.shared.log("Shazam: restore session failed: \(error.localizedDescription)", category: "Audio")
        }
    }
    
    func cancel() {
        DebugLogger.shared.log("Shazam: cancelled", category: "Audio")
        deliverResult(nil)
    }
}



// MARK: - Shazam Result Sheet

struct ShazamResultSheet: View {
    let title: String
    let artworkURL: URL?
    let previewURL: URL?
    
    @Environment(\.dismiss) private var dismiss
    @State private var previewPlayer: AVPlayer?
    @State private var isPlayingPreview = false
    
    private let accentPink = Color(red: 1.0, green: 0.176, blue: 0.333)
    
    var body: some View {
        VStack(spacing: 20) {
            // Artwork
            if let url = artworkURL {
                AsyncImage(url: url) { image in
                    image.resizable()
                        .aspectRatio(contentMode: .fill)
                } placeholder: {
                    RoundedRectangle(cornerRadius: 12)
                        .fill(Color.white.opacity(0.08))
                        .overlay(ProgressView().tint(accentPink))
                }
                .frame(width: 180, height: 180)
                .cornerRadius(12)
                .shadow(color: .black.opacity(0.4), radius: 12, y: 6)
            } else {
                RoundedRectangle(cornerRadius: 12)
                    .fill(Color.white.opacity(0.08))
                    .frame(width: 180, height: 180)
                    .overlay(
                        Image(systemName: "shazam.logo")
                            .font(.system(size: 50))
                            .foregroundColor(.gray)
                    )
            }
            
            // Title
            Text(title)
                .font(.system(size: 18, weight: .semibold))
                .foregroundColor(.white)
                .multilineTextAlignment(.center)
                .padding(.horizontal, 24)
            
            // Preview button
            if let previewURL = previewURL {
                Button(action: { togglePreview(url: previewURL) }) {
                    HStack(spacing: 8) {
                        Image(systemName: isPlayingPreview ? "pause.fill" : "play.fill")
                            .font(.system(size: 14))
                        Text(isPlayingPreview ? "Stop Preview" : "Play 30s Preview")
                            .font(.system(size: 14, weight: .medium))
                    }
                    .foregroundColor(.white)
                    .padding(.horizontal, 24)
                    .padding(.vertical, 10)
                    .background(accentPink)
                    .cornerRadius(20)
                }
            }
            
            Spacer()
        }
        .padding(.top, 24)
        .frame(maxWidth: .infinity)
        .background(Color(white: 0.1))
        .onDisappear {
            previewPlayer?.pause()
            previewPlayer = nil
        }
    }
    
    private func togglePreview(url: URL) {
        if isPlayingPreview {
            previewPlayer?.pause()
            isPlayingPreview = false
        } else {
            if previewPlayer == nil {
                previewPlayer = AVPlayer(url: url)
            } else {
                previewPlayer?.replaceCurrentItem(with: AVPlayerItem(url: url))
            }
            previewPlayer?.play()
            isPlayingPreview = true
        }
    }
}

// MARK: - Song Info Sheet
struct SongInfoSheet: View {
    let song: Song
    @Environment(\.dismiss) private var dismiss
    
    private let accentPink = Color(red: 1.0, green: 0.176, blue: 0.333)
    
    var body: some View {
        NavigationStack {
            List {
                Section("TRACK") {
                    infoRow("Title", song.title)
                    infoRow("Artist", song.artist ?? "Unknown")
                    infoRow("Album", song.album ?? "Unknown")
                    if let track = song.track { infoRow("Track #", "\(track)") }
                    if let disc = song.discNumber { infoRow("Disc #", "\(disc)") }
                    if let year = song.year { infoRow("Year", "\(year)") }
                    if let genre = song.genre { infoRow("Genre", genre) }
                }
                
                Section("FILE") {
                    if let dur = song.duration, dur > 0 { infoRow("Duration", song.durationFormatted) }
                    if let bitRate = song.bitRate { infoRow("Bit Rate", "\(bitRate) kbps") }
                    if let suffix = song.suffix { infoRow("Format", suffix.uppercased()) }
                    if let contentType = song.contentType { infoRow("Content Type", contentType) }
                    if let size = song.size {
                        infoRow("File Size", ByteCountFormatter.string(fromByteCount: Int64(size), countStyle: .file))
                    }
                    if let path = song.path { infoRow("Path", path) }
                }
                
                Section("METADATA") {
                    infoRow("Song ID", song.id)
                    if let albumId = song.albumId { infoRow("Album ID", albumId) }
                    if let artistId = song.artistId { infoRow("Artist ID", artistId) }
                    if let playCount = song.playCount { infoRow("Play Count", "\(playCount)") }
                    if let created = song.created { infoRow("Added", created) }
                    if let bpm = song.bpm { infoRow("BPM", "\(bpm)") }
                    infoRow("Starred", song.starred != nil ? "Yes" : "No")
                    
                    let isDownloaded = OfflineManager.shared.isSongDownloaded(song.id)
                    infoRow("Downloaded", isDownloaded ? "Yes" : "No")
                }
            }
            .navigationTitle("Get Info")
            .navigationBarTitleDisplayMode(.inline)
            .toolbar {
                ToolbarItem(placement: .navigationBarTrailing) {
                    Button("Done") { dismiss() }.foregroundColor(accentPink)
                }
            }
        }
    }
    
    private func infoRow(_ label: String, _ value: String) -> some View {
        HStack {
            Text(label).foregroundColor(.gray)
            Spacer()
            Text(value)
                .foregroundColor(.white)
                .multilineTextAlignment(.trailing)
                .lineLimit(2)
        }
        .font(.system(size: 14))
    }
}