import SwiftUI
import SwiftBricks

@main
struct MiniPlayerApp: App {
    @StateObject private var bridge = PlayerBridge()
    
    var body: some Scene {
        WindowGroup {
            ContentView(bridge: bridge)
                .frame(minWidth: 900, minHeight: 600)
                .onAppear { bridge.setup() }
        }
        #if os(macOS)
        .commands {
            CommandGroup(replacing: .newItem) {}
            CommandMenu("播放") {
                Button("播放/暂停") { bridge.togglePlayPause() }
                    .keyboardShortcut(" ", modifiers: [])
                Divider()
                Button("上一首") { bridge.playPrev() }
                    .keyboardShortcut("[", modifiers: [])
                Button("下一首") { bridge.playNext() }
                    .keyboardShortcut("]", modifiers: [])
                Divider()
                Button("全屏") { bridge.toggleFullscreen() }
                    .keyboardShortcut("f", modifiers: .command)
                Divider()
                Button("循环模式") { bridge.cycleRepeatMode() }
                    .keyboardShortcut("r", modifiers: .command)
            }
            CommandMenu("文件") {
                Button("打开文件...") { bridge.openFileDialog() }
                    .keyboardShortcut("o", modifiers: .command)
                Divider()
                Button("添加URL...") { bridge.showURLDialog = true }
                    .keyboardShortcut("u", modifiers: .command)
            }
        }
        #endif
    }
}

/// 主内容视图 — 加载BricksJSON + 注册自定义widget
struct ContentView: View {
    @ObservedObject var bridge: PlayerBridge
    
    var body: some View {
        Group {
            if let engine = bridge.engine, let schema = bridge.schema {
                BricksView(schema: schema, engine: engine)
                    .overlay(alignment: .top) {
                        if let error = bridge.toastMessage {
                            Text(error)
                                .padding(8)
                                .background(.black.opacity(0.7))
                                .foregroundColor(.white)
                                .cornerRadius(6)
                                .padding(.top, 8)
                                .transition(.opacity)
                        }
                    }
                    .sheet(isPresented: $bridge.showURLDialog) {
                        URLInputDialog(bridge: bridge)
                    }
                    #if os(macOS)
                    .sheet(isPresented: $bridge.showTrackDialog) {
                        TrackSelectDialog(bridge: bridge)
                    }
                    #endif
            } else {
                ProgressView("初始化...")
            }
        }
    }
}

/// URL输入弹窗
struct URLInputDialog: View {
    @ObservedObject var bridge: PlayerBridge
    @State private var url = ""
    @Environment(\.dismiss) private var dismiss
    
    var body: some View {
        VStack(spacing: 16) {
            Text("添加媒体URL").font(.headline)
            TextField("https://example.com/video.m3u8", text: $url)
                .textFieldStyle(.roundedBorder)
            HStack {
                Button("取消") { dismiss() }
                Spacer()
                Button("添加") {
                    if !url.isEmpty {
                        bridge.addURL(url)
                        dismiss()
                    }
                }
                .keyboardShortcut(.defaultAction)
                .disabled(url.isEmpty)
            }
        }
        .padding(20)
        .frame(width: 400)
    }
}

/// 音轨选择弹窗
struct TrackSelectDialog: View {
    @ObservedObject var bridge: PlayerBridge
    @Environment(\.dismiss) private var dismiss
    
    var body: some View {
        VStack(spacing: 12) {
            Text("选择音轨").font(.headline)
            ForEach(Array(bridge.availableTracks.enumerated()), id: \.offset) { idx, track in
                Button(action: {
                    bridge.selectTrack(index: idx)
                    dismiss()
                }) {
                    HStack {
                        Text("Track \(idx + 1)")
                        Spacer()
                        if idx == bridge.currentTrackIndex {
                            Text("✓").foregroundColor(.green)
                        }
                    }
                    .padding(8)
                    .contentShape(Rectangle())
                }
                .buttonStyle(.plain)
            }
            Divider()
            Button("关闭") { dismiss() }
        }
        .padding(20)
        .frame(minWidth: 250)
    }
}