import SwiftData
import SwiftUI

/// MixBoard — A macOS music player and mix preparation tool with DAW export.
@main
struct MixBoardApp: App {
    @State private var playerVM = PlayerViewModel()
    @State private var playlistVM = PlaylistViewModel()
    @StateObject private var libraryManager = LibraryManager()
    @StateObject private var theme = AppTheme()
    @StateObject private var syncWatcher = SyncWatcher()
    @ObservedObject private var shortcutConfig = KeyboardShortcutConfig.shared

    var body: some Scene {
        WindowGroup {
            ContentView()
                .environment(playerVM)
                .environment(playlistVM)
                .environmentObject(libraryManager)
                .environmentObject(theme)
                .environmentObject(syncWatcher)
                .preferredColorScheme(theme.preferredScheme)
                .onAppear {
                    // Faster tooltips (200ms instead of default ~1000ms)
                    UserDefaults.standard.set(200, forKey: "NSInitialToolTipDelay")
                    MediaKeyHandler.shared.register(playerVM: playerVM)
                    syncWatcher.createSyncFolders()
                    syncWatcher.startWatching()
                    AppIconConfig.shared.applyIcon()
                }
        }
        .modelContainer(for: [Track.self, CuePoint.self, Playlist.self, PlaylistEntry.self, PlaylistFolder.self])
        .windowStyle(.titleBar)
        .windowToolbarStyle(.unified(showsTitle: true))
        .defaultSize(width: 1200, height: 800)
        .commands {
            CommandGroup(replacing: .newItem) {
                Button("New Playlist...") {
                    NotificationCenter.default.post(name: .newPlaylist, object: nil)
                }
                .keyboardShortcut(
                    shortcutConfig.binding(for: .newPlaylist).keyEquivalent,
                    modifiers: shortcutConfig.binding(for: .newPlaylist).eventModifiers
                )
            }

            CommandMenu("View") {
                Button("Now Playing") {
                    NotificationCenter.default.post(name: .toggleNowPlaying, object: nil)
                }
                .keyboardShortcut(
                    shortcutConfig.binding(for: .nowPlaying).keyEquivalent,
                    modifiers: shortcutConfig.binding(for: .nowPlaying).eventModifiers
                )

                Divider()

                Button("Library") {
                    NotificationCenter.default.post(name: .toggleBrowsePanel, object: nil)
                }
                .keyboardShortcut("b", modifiers: .command)
            }

            CommandMenu("Playback") {
                Button("Play / Pause") {
                    playerVM.togglePlayPause()
                }
                .keyboardShortcut(
                    shortcutConfig.binding(for: .playPause).keyEquivalent,
                    modifiers: shortcutConfig.binding(for: .playPause).eventModifiers
                )

                Button("Stop") {
                    playerVM.stop()
                }
                .keyboardShortcut(
                    shortcutConfig.binding(for: .stop).keyEquivalent,
                    modifiers: shortcutConfig.binding(for: .stop).eventModifiers
                )

                Divider()

                Button("Next Track") {
                    playerVM.playNext()
                }
                .keyboardShortcut(
                    shortcutConfig.binding(for: .nextTrack).keyEquivalent,
                    modifiers: shortcutConfig.binding(for: .nextTrack).eventModifiers
                )

                Button("Previous Track") {
                    playerVM.playPrevious()
                }
                .keyboardShortcut(
                    shortcutConfig.binding(for: .previousTrack).keyEquivalent,
                    modifiers: shortcutConfig.binding(for: .previousTrack).eventModifiers
                )

                Divider()

                Button("Skip Forward 10s") {
                    playerVM.skipForward()
                }
                .keyboardShortcut(
                    shortcutConfig.binding(for: .skipForward).keyEquivalent,
                    modifiers: shortcutConfig.binding(for: .skipForward).eventModifiers
                )

                Button("Skip Backward 10s") {
                    playerVM.skipBackward()
                }
                .keyboardShortcut(
                    shortcutConfig.binding(for: .skipBackward).keyEquivalent,
                    modifiers: shortcutConfig.binding(for: .skipBackward).eventModifiers
                )

                Divider()

                Button(playerVM.shuffleEnabled ? "Shuffle: On" : "Shuffle: Off") {
                    playerVM.shuffleEnabled.toggle()
                }
                .keyboardShortcut(
                    shortcutConfig.binding(for: .toggleShuffle).keyEquivalent,
                    modifiers: shortcutConfig.binding(for: .toggleShuffle).eventModifiers
                )

                Button("Repeat: \(playerVM.repeatMode.rawValue)") {
                    switch playerVM.repeatMode {
                    case .off: playerVM.repeatMode = .all
                    case .all: playerVM.repeatMode = .one
                    case .one: playerVM.repeatMode = .off
                    }
                }
                .keyboardShortcut(
                    shortcutConfig.binding(for: .toggleRepeat).keyEquivalent,
                    modifiers: shortcutConfig.binding(for: .toggleRepeat).eventModifiers
                )
            }

            CommandMenu("Mix") {
                // Per-slot quick-add
                let mixActions: [ShortcutAction] = [.addToMix1, .addToMix2, .addToMix3]
                ForEach(0..<3, id: \.self) { slot in
                    Button("Add to \(playlistVM.mixTargetName(slot))") {
                        if let track = playerVM.currentTrack {
                            NotificationCenter.default.post(
                                name: .quickAddToMix,
                                object: nil,
                                userInfo: ["slot": slot, "track": track]
                            )
                        }
                    }
                    .keyboardShortcut(
                        shortcutConfig.binding(for: mixActions[slot]).keyEquivalent,
                        modifiers: shortcutConfig.binding(for: mixActions[slot]).eventModifiers
                    )
                }

                Divider()

                Button("Export to DAW...") {
                    playlistVM.showExportSheet = true
                }
                .keyboardShortcut(
                    shortcutConfig.binding(for: .exportToDAW).keyEquivalent,
                    modifiers: shortcutConfig.binding(for: .exportToDAW).eventModifiers
                )

                Divider()

                Button("Import from iPhone...") {
                    NotificationCenter.default.post(name: .importFromiPhone, object: nil)
                }
                .keyboardShortcut(
                    shortcutConfig.binding(for: .importFromiPhone).keyEquivalent,
                    modifiers: shortcutConfig.binding(for: .importFromiPhone).eventModifiers
                )

                Divider()

                Button("Search All Playlists...") {
                    NotificationCenter.default.post(name: .globalSearch, object: nil)
                }
                .keyboardShortcut(
                    shortcutConfig.binding(for: .search).keyEquivalent,
                    modifiers: shortcutConfig.binding(for: .search).eventModifiers
                )
            }
        }

        // Settings (⌘,)
        Settings {
            SettingsView()
                .environment(playlistVM)
                .environmentObject(theme)
                .preferredColorScheme(theme.preferredScheme)
        }
        .modelContainer(for: [Track.self, CuePoint.self, Playlist.self, PlaylistEntry.self, PlaylistFolder.self])

        // Now Playing window (Tidal-style separate window)
        Window("Now Playing", id: "now-playing") {
            NowPlayingView(displayMode: .floating)
                .environment(playerVM)
                .environment(playlistVM)
                .environmentObject(libraryManager)
                .environmentObject(theme)
                .preferredColorScheme(theme.preferredScheme)
        }
        .defaultSize(width: 850, height: 600)
        .windowStyle(.titleBar)
    }
}

// MARK: - Notification Names

extension Notification.Name {
    static let newPlaylist = Notification.Name("newPlaylist")
    static let quickAddToTarget = Notification.Name("quickAddToTarget")
    static let quickAddToMix = Notification.Name("quickAddToMix")
    static let globalSearch = Notification.Name("globalSearch")
    static let importFromiPhone = Notification.Name("importFromiPhone")
    static let toggleNowPlaying = Notification.Name("toggleNowPlaying")
    static let toggleBrowsePanel = Notification.Name("toggleBrowsePanel")
    static let popOutNowPlaying = Notification.Name("popOutNowPlaying")
    static let closeInlineNowPlaying = Notification.Name("closeInlineNowPlaying")
    static let doubleClickPlayTrack = Notification.Name("doubleClickPlayTrack")
}