import SwiftUI
import AVFoundation
import AudioToolbox
import Combine

// MARK: - 主扫描视图
struct ScannerView: View {
    @StateObject private var scannerViewModel = ScannerViewModel()
    @State private var showPreviewPause = false
    @State private var selectedScanningStyle: ScanningLineStyle = .modern
    @State private var screenOrientation = UIDevice.current.orientation
    @State private var previewLayer: AVCaptureVideoPreviewLayer?
    
    @Environment(\.dismiss) private var dismiss
    
    var body: some View {
        ZStack {
            // 相机权限检查
            if scannerViewModel.cameraAuthorizationStatus == .authorized {
                // 相机预览层
                CameraPreviewView(session: scannerViewModel.captureSession, previewLayer: $previewLayer)
                    .ignoresSafeArea()
                
                // 扫描界面覆盖层
                ScanningOverlayView(
                    showPreviewPause: showPreviewPause,
                    selectedStyle: $selectedScanningStyle,
                    detectedCodesCount: scannerViewModel.detectedCodes.count,
                    onClose: { dismiss() }
                )
                
                // 条码位置标记覆盖层
                if showPreviewPause && !scannerViewModel.detectedCodes.isEmpty {
                    CodePositionOverlay(
                        detectedCodes: scannerViewModel.detectedCodes,
                        previewLayer: previewLayer,
                        onCodeSelected: handleCodeSelection,
                        onRescan: resetToScanning
                    )
                }
                
                // 测试按钮（调试用）
                if showPreviewPause && scannerViewModel.detectedCodes.count == 1 {
                    TestAutoSelectButton(
                        detectedCode: scannerViewModel.detectedCodes[0],
                        onSelect: handleCodeSelection
                    )
                }
            } else {
                // 权限未授权时的UI
                CameraPermissionView(
                    authorizationStatus: scannerViewModel.cameraAuthorizationStatus,
                    onRequestPermission: {
                        scannerViewModel.refreshCameraPermission()
                    },
                    onOpenSettings: {
                        scannerViewModel.openSettings()
                    }
                )
            }
        }
        .onAppear {
            // 只有在相机权限已授权时才启动扫描
            if scannerViewModel.cameraAuthorizationStatus == .authorized {
                scannerViewModel.startScanning()
            }
        }
        .onDisappear {
            scannerViewModel.stopScanning()
        }
        .alert("scan_error_title".localized, isPresented: $scannerViewModel.showAlert) {
            Button("OK") { }
        } message: {
            Text("scan_error_message".localized)
        }
        .onReceive(scannerViewModel.$detectedCodes) { codes in
            handleDetectedCodes(codes)
        }
        .onReceive(scannerViewModel.$cameraAuthorizationStatus) { status in
            if status == .authorized {
                logInfo("🎯 相机权限已授权，启动扫描", className: "ScannerView")
                scannerViewModel.startScanning()
            }
        }
        .onReceive(NotificationCenter.default.publisher(for: UIDevice.orientationDidChangeNotification)) { _ in
            handleOrientationChange()
        }
    }
    
    // MARK: - 私有方法
    
    private func handleDetectedCodes(_ codes: [DetectedCode]) {
        guard !codes.isEmpty else { return }
        
        logInfo("检测到条码数量: \(codes.count)", className: "ScannerView")
        
        if codes.count == 1 {
            logInfo("单个条码，准备自动选择", className: "ScannerView")
            pauseForPreview()
            autoSelectSingleCode(code: codes[0])
        } else {
            logInfo("多个条码，等待用户选择", className: "ScannerView")
            pauseForPreview()
        }
    }
    
    private func handleOrientationChange() {
        screenOrientation = UIDevice.current.orientation
        logInfo("Screen orientation changed to: \(screenOrientation.rawValue)", className: "ScannerView")
    }
    
    private func handleCodeSelection(_ selectedCode: DetectedCode) {
        logInfo("🎯 ScannerView 收到条码选择回调", className: "ScannerView")
        logInfo("  选择的条码ID: \(selectedCode.id)", className: "ScannerView")
        logInfo("  选择的条码类型: \(selectedCode.type)", className: "ScannerView")
        logInfo("  选择的条码内容: \(selectedCode.content)", className: "ScannerView")
        logInfo("  选择的条码位置: \(selectedCode.bounds)", className: "ScannerView")
        
        let formattedResult = "类型: \(selectedCode.type)\n内容: \(selectedCode.content)"
        logInfo("  格式化结果: \(formattedResult)", className: "ScannerView")
        
        NotificationCenter.default.post(name: .scannerDidScanCode, object: formattedResult)
        dismiss()
    }
    
    private func pauseForPreview() {
        showPreviewPause = true
    }
    
    private func resetToScanning() {
        logInfo("🔄 ScannerView 开始重置到扫描状态", className: "ScannerView")
        
        // 重置UI状态
        showPreviewPause = false
        
        // 重置扫描状态并重新开始
        scannerViewModel.resetDetection()
        scannerViewModel.restartScanning()
        
        // 延迟检查会话状态
        DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) {
            logInfo("🔍 检查扫描会话状态", className: "ScannerView")
            self.scannerViewModel.checkSessionStatus()
        }
        
        logInfo("✅ ScannerView 已重置到扫描状态", className: "ScannerView")
    }
    
    private func autoSelectSingleCode(code: DetectedCode) {
        logInfo("开始自动选择定时器，条码类型: \(code.type)", className: "ScannerView")
        
        DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) {
            guard self.showPreviewPause && self.scannerViewModel.detectedCodes.count == 1 else {
                logInfo("条件不满足，取消自动选择", className: "ScannerView")
                return
            }
            
            logInfo("条件满足，执行自动选择", className: "ScannerView")
            self.handleCodeSelection(code)
        }
    }
}

// MARK: - 扫描界面覆盖层
struct ScanningOverlayView: View {
    let showPreviewPause: Bool
    @Binding var selectedStyle: ScanningLineStyle
    let detectedCodesCount: Int
    let onClose: () -> Void
    
    var body: some View {
        VStack {
            Spacer()
            
            // 扫描线组件
            if !showPreviewPause {
                ScanningLineView(style: selectedStyle)
            }
            
            // 提示文本
            ScanningInstructionView(
                showPreviewPause: showPreviewPause,
                detectedCodesCount: detectedCodesCount
            )
            
            Spacer()
            
            // 底部按钮区域
            ScanningBottomButtonsView(
                showPreviewPause: showPreviewPause,
                selectedStyle: $selectedStyle,
                onClose: onClose
            )
        }
    }
}

// MARK: - 扫描指令视图
struct ScanningInstructionView: View {
    let showPreviewPause: Bool
    let detectedCodesCount: Int
    
    var body: some View {
        if showPreviewPause {
            VStack(spacing: 8) {
                Text("detected_codes".localized)
                    .foregroundColor(.white)
                    .font(.headline)
                
                if detectedCodesCount == 1 {
                    Text("auto_result_1s".localized)
                        .foregroundColor(.green)
                        .font(.subheadline)
                } else {
                    Text("select_code_instruction".localized)
                        .foregroundColor(.white.opacity(0.8))
                        .font(.subheadline)
                }
            }
            .padding(.top, 20)
        } else {
            Text("scan_instruction".localized)
                .foregroundColor(.white)
                .font(.headline)
                .padding(.top, 20)
        }
    }
}

// MARK: - 扫描底部按钮视图
struct ScanningBottomButtonsView: View {
    let showPreviewPause: Bool
    @Binding var selectedStyle: ScanningLineStyle
    let onClose: () -> Void
    
    var body: some View {
        VStack(spacing: 15) {
            // 扫描线样式选择器
            if !showPreviewPause {
                ScanningStyleSelectorView(selectedStyle: $selectedStyle)
            }
            
            // 关闭按钮 - 只在非预览选择状态时显示
            if !showPreviewPause {
                Button("close_button".localized) {
                    onClose()
                }
                .foregroundColor(.white)
                .padding()
                .background(Color.black.opacity(0.6))
                .cornerRadius(10)
            }
        }
        .padding(.bottom, 50)
    }
}

// MARK: - 扫描线样式选择器
struct ScanningStyleSelectorView: View {
    @Binding var selectedStyle: ScanningLineStyle
    
    var body: some View {
        HStack(spacing: 10) {
            ForEach(ScanningLineStyle.allCases, id: \.self) { style in
                Button(style.localizedName) {
                    selectedStyle = style
                }
                .foregroundColor(.white)
                .padding(.horizontal, 8)
                .padding(.vertical, 4)
                .background(selectedStyle == style ? Color.green : Color.gray.opacity(0.6))
                .cornerRadius(8)
                .font(.caption)
            }
        }
        .padding(.bottom, 10)
    }
}

// MARK: - 测试自动选择按钮
struct TestAutoSelectButton: View {
    let detectedCode: DetectedCode
    let onSelect: (DetectedCode) -> Void
    
    var body: some View {
        VStack {
            HStack {
                Spacer()
                Button("test_auto_select".localized) {
                    onSelect(detectedCode)
                }
                .foregroundColor(.white)
                .padding(8)
                .background(Color.red)
                .cornerRadius(8)
                .padding(.trailing, 20)
            }
            Spacer()
        }
    }
}

// MARK: - 相机预览视图
struct CameraPreviewView: UIViewRepresentable {
    let session: AVCaptureSession
    @Binding var previewLayer: AVCaptureVideoPreviewLayer?
    
    func makeUIView(context: Context) -> UIView {
        let view = UIView()
        let previewLayer = AVCaptureVideoPreviewLayer(session: session)
        previewLayer.frame = view.bounds
        previewLayer.videoGravity = .resizeAspectFill
        view.layer.addSublayer(previewLayer)
        
        DispatchQueue.main.async {
            self.previewLayer = previewLayer
        }
        
        return view
    }
    
    func updateUIView(_ uiView: UIView, context: Context) {
        if let previewLayer = uiView.layer.sublayers?.first as? AVCaptureVideoPreviewLayer {
            previewLayer.frame = uiView.bounds
            
            DispatchQueue.main.async {
                self.previewLayer = previewLayer
            }
        }
    }
}

// MARK: - 扫描器视图模型
class ScannerViewModel: NSObject, ObservableObject, AVCaptureMetadataOutputObjectsDelegate {
    @Published var detectedCodes: [DetectedCode] = []
    @Published var showAlert = false
    @Published var cameraAuthorizationStatus: AVAuthorizationStatus = .notDetermined
    @Published var showPermissionAlert = false
    
    var captureSession: AVCaptureSession!
    private var metadataOutput: AVCaptureMetadataOutput?
    
    override init() {
        super.init()
        checkCameraPermission()
    }
    
    // MARK: - 相机权限管理
    
    private func checkCameraPermission() {
        logInfo("🔍 检查相机权限状态", className: "ScannerViewModel")
        
        switch AVCaptureDevice.authorizationStatus(for: .video) {
        case .authorized:
            logInfo("✅ 相机权限已授权", className: "ScannerViewModel")
            cameraAuthorizationStatus = .authorized
            setupCaptureSession()
            
        case .notDetermined:
            logInfo("❓ 相机权限未确定，请求权限", className: "ScannerViewModel")
            requestCameraPermission()
            
        case .denied, .restricted:
            logWarning("❌ 相机权限被拒绝或受限", className: "ScannerViewModel")
            cameraAuthorizationStatus = AVCaptureDevice.authorizationStatus(for: .video)
            showPermissionAlert = true
            
        @unknown default:
            logWarning("❓ 未知的相机权限状态", className: "ScannerViewModel")
            cameraAuthorizationStatus = .notDetermined
        }
    }
    
    private func requestCameraPermission() {
        logInfo("🔐 请求相机权限", className: "ScannerViewModel")
        
        AVCaptureDevice.requestAccess(for: .video) { [weak self] granted in
            DispatchQueue.main.async {
                if granted {
                    logInfo("✅ 相机权限请求成功", className: "ScannerViewModel")
                    self?.cameraAuthorizationStatus = .authorized
                    self?.setupCaptureSession()
                } else {
                    logWarning("❌ 相机权限请求被拒绝", className: "ScannerViewModel")
                    self?.cameraAuthorizationStatus = .denied
                    self?.showPermissionAlert = true
                }
            }
        }
    }
    
    func openSettings() {
        logInfo("⚙️ 打开系统设置", className: "ScannerViewModel")
        
        if let settingsUrl = URL(string: UIApplication.openSettingsURLString) {
            UIApplication.shared.open(settingsUrl) { success in
                if success {
                    logInfo("✅ 成功打开系统设置", className: "ScannerViewModel")
                } else {
                    logWarning("⚠️ 打开系统设置失败", className: "ScannerViewModel")
                }
            }
        }
    }
    
    func refreshCameraPermission() {
        logInfo("🔍 重新检查相机权限状态", className: "ScannerViewModel")
        checkCameraPermission()
    }
    
    // MARK: - 相机设置
    
    private func setupCaptureSession() {
        captureSession = AVCaptureSession()
        
        guard let videoCaptureDevice = AVCaptureDevice.default(for: .video) else {
            showAlert = true
            return
        }
        
        let videoInput: AVCaptureDeviceInput
        
        do {
            videoInput = try AVCaptureDeviceInput(device: videoCaptureDevice)
        } catch {
            showAlert = true
            return
        }
        
        if captureSession.canAddInput(videoInput) {
            captureSession.addInput(videoInput)
        } else {
            showAlert = true
            return
        }
        
        metadataOutput = AVCaptureMetadataOutput()
        
        if let metadataOutput = metadataOutput,
           captureSession.canAddOutput(metadataOutput) {
            captureSession.addOutput(metadataOutput)
            metadataOutput.setMetadataObjectsDelegate(self, queue: DispatchQueue.main)
            metadataOutput.metadataObjectTypes = [.qr, .ean8, .ean13, .code128, .code39, .upce, .pdf417, .aztec]
        } else {
            showAlert = true
            return
        }
    }
    
    // MARK: - 扫描控制
    
    func startScanning() {
        logInfo("🔄 开始扫描", className: "ScannerViewModel")
        
        // 检查会话是否已经在运行
        if captureSession?.isRunning == true {
            logInfo("ℹ️ 扫描会话已经在运行", className: "ScannerViewModel")
            return
        }
        
        DispatchQueue.global(qos: .userInitiated).async { [weak self] in
            guard let self = self else { return }
            
            self.captureSession?.startRunning()
            
            // 检查启动状态
            DispatchQueue.main.asyncAfter(deadline: .now() + 0.2) {
                if self.captureSession?.isRunning == true {
                    logInfo("✅ 扫描会话启动成功", className: "ScannerViewModel")
                } else {
                    logWarning("⚠️ 扫描会话启动失败", className: "ScannerViewModel")
                }
            }
        }
    }
    
    func stopScanning() {
        logInfo("🔄 停止扫描", className: "ScannerViewModel")
        
        // 检查会话是否在运行
        if captureSession?.isRunning == true {
            DispatchQueue.global(qos: .userInitiated).async { [weak self] in
                self?.captureSession?.stopRunning()
                
                DispatchQueue.main.async {
                    logInfo("✅ 扫描会话已停止", className: "ScannerViewModel")
                }
            }
        } else {
            logInfo("ℹ️ 扫描会话已经停止", className: "ScannerViewModel")
        }
    }
    
    func resetDetection() {
        DispatchQueue.main.async {
            logInfo("🔄 重置检测状态，清空 detectedCodes", className: "ScannerViewModel")
            self.detectedCodes = []
        }
    }
    
    func isSessionRunning() -> Bool {
        return captureSession?.isRunning == true
    }
    
    func checkSessionStatus() {
        let isRunning = captureSession?.isRunning == true
        logInfo("📊 扫描会话状态检查: \(isRunning ? "运行中" : "已停止")", className: "ScannerViewModel")
        
        if !isRunning {
            logWarning("⚠️ 扫描会话未运行，尝试重新启动", className: "ScannerViewModel")
            startScanning()
        }
    }
    
    func restartScanning() {
        logInfo("🔄 重新开始扫描", className: "ScannerViewModel")
        
        // 确保在主线程执行UI相关操作
        DispatchQueue.main.async { [weak self] in
            guard let self = self else { return }
            
            // 先停止当前会话
            if self.captureSession?.isRunning == true {
                logInfo("🔄 停止当前运行的扫描会话", className: "ScannerViewModel")
                self.captureSession?.stopRunning()
            }
            
            // 重置检测状态
            self.detectedCodes = []
            
            // 延迟后重新启动会话
            DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
                
                logInfo("🔄 准备重新启动扫描会话", className: "ScannerViewModel")
                
                // 在后台线程启动会话
                DispatchQueue.global(qos: .userInitiated).async {
                    self.captureSession?.startRunning()
                    
                    // 检查会话状态
                    DispatchQueue.main.asyncAfter(deadline: .now() + 0.2) {
                        if self.captureSession?.isRunning == true {
                            logInfo("✅ 扫描会话已成功重新启动", className: "ScannerViewModel")
                        } else {
                            logWarning("⚠️ 扫描会话启动失败，尝试重新启动", className: "ScannerViewModel")
                            // 如果启动失败，再次尝试
                            DispatchQueue.global(qos: .userInitiated).async {
                                self.captureSession?.startRunning()
                                DispatchQueue.main.async {
                                    if self.captureSession?.isRunning == true {
                                        logInfo("✅ 扫描会话第二次尝试启动成功", className: "ScannerViewModel")
                                    } else {
                                        logError("❌ 扫描会话启动失败", className: "ScannerViewModel")
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }
    
    // MARK: - AVCaptureMetadataOutputObjectsDelegate
    
    func metadataOutput(_ output: AVCaptureMetadataOutput, 
                       didOutput metadataObjects: [AVMetadataObject], 
                       from connection: AVCaptureConnection) {
        
        logInfo("metadataOutput 被调用，检测到 \(metadataObjects.count) 个对象", className: "ScannerViewModel")
        
        // 震动反馈
        AudioServicesPlaySystemSound(SystemSoundID(kSystemSoundID_Vibrate))
        
        // 停止扫描
        stopScanning()
        
        // 处理所有检测到的条码
        var codes: [DetectedCode] = []
        
        for metadataObject in metadataObjects {
            if let readableObject = metadataObject as? AVMetadataMachineReadableCodeObject,
               let stringValue = readableObject.stringValue {
                
                let codeType = readableObject.type.rawValue
                let bounds = readableObject.bounds
                
                let detectedCode = DetectedCode(
                    type: codeType,
                    content: stringValue,
                    bounds: bounds
                )
                
                codes.append(detectedCode)
                logInfo("创建 DetectedCode: 类型=\(codeType), 内容=\(stringValue)", className: "ScannerViewModel")
            }
        }
        
        logInfo("准备更新 detectedCodes，数量: \(codes.count)", className: "ScannerViewModel")
        
        // 更新检测到的条码列表
        DispatchQueue.main.async {
            logInfo("在主线程更新 detectedCodes", className: "ScannerViewModel")
            self.detectedCodes = codes
        }
    }
}

// MARK: - 条码位置标记覆盖层
struct CodePositionOverlay: View {
    let detectedCodes: [DetectedCode]
    let previewLayer: AVCaptureVideoPreviewLayer?
    let onCodeSelected: (DetectedCode) -> Void
    let onRescan: () -> Void
    
    var body: some View {
        GeometryReader { geometry in
            ZStack {
                ForEach(detectedCodes) { code in
                    CodePositionMarker(
                        code: code, 
                        screenSize: geometry.size,
                        previewLayer: previewLayer,
                        onCodeSelected: onCodeSelected
                    )
                }
                
                // 调试信息：显示触摸区域边界
                #if DEBUG
                ForEach(detectedCodes) { code in
                    let position = calculateDebugPosition(code: code, screenSize: geometry.size)
                    Rectangle()
                        .stroke(Color.red, lineWidth: 1)
                        .frame(width: 80, height: 80)
                        .position(x: position.x, y: position.y)
                        .opacity(0.3)
                }
                #endif
                
                // 重新扫描按钮 - 放在右上角
                VStack {
                    HStack {
                        Spacer()
                        Button(action: {
                            logInfo("🔄 用户点击重新扫描按钮", className: "CodePositionOverlay")
                            
                            // 添加触觉反馈
                            let impactFeedback = UIImpactFeedbackGenerator(style: .medium)
                            impactFeedback.impactOccurred()
                            
                            onRescan()
                        }) {
                            HStack(spacing: 8) {
                                Image(systemName: "arrow.clockwise")
                                    .font(.system(size: 18, weight: .semibold))
                                    .rotationEffect(.degrees(0))
                                    .animation(.easeInOut(duration: 0.3), value: true)
                                
                                Text("rescan_button".localized)
                                    .font(.system(size: 15, weight: .semibold))
                            }
                            .foregroundColor(.white)
                            .padding(.horizontal, 20)
                            .padding(.vertical, 10)
                            .background(
                                RoundedRectangle(cornerRadius: 25)
                                    .fill(Color.blue.opacity(0.9))
                                    .shadow(color: .black.opacity(0.3), radius: 4, x: 0, y: 2)
                            )
                        }
                        .buttonStyle(RescanButtonStyle())
                        .padding(.trailing, 25)
                        .padding(.top, 25)
                        
                        // 调试按钮：检查会话状态
                        #if DEBUG
                        Button(action: {
                            logInfo("🔍 调试：检查扫描会话状态", className: "CodePositionOverlay")
                            // 这里可以添加会话状态检查逻辑
                        }) {
                            Image(systemName: "info.circle")
                                .font(.system(size: 16, weight: .medium))
                                .foregroundColor(.yellow)
                                .padding(8)
                                .background(Color.black.opacity(0.6))
                                .clipShape(Circle())
                        }
                        .padding(.trailing, 10)
                        .padding(.top, 25)
                        #endif
                    }
                    Spacer()
                }
            }
        }
        .allowsHitTesting(true)
        .contentShape(Rectangle()) // 确保整个区域都可以接收触摸事件
        .zIndex(1000) // 确保在最上层，不被其他视图遮挡
    }
    
    // 调试用的位置计算方法
    private func calculateDebugPosition(code: DetectedCode, screenSize: CGSize) -> CGPoint {
        guard let previewLayer = previewLayer else {
            return CGPoint(x: screenSize.width / 2, y: screenSize.height / 2)
        }
        
        let metadataObject = code.bounds
        let convertedPoint = previewLayer.layerPointConverted(fromCaptureDevicePoint: CGPoint(
            x: metadataObject.midX,
            y: metadataObject.midY
        ))
        
        let clampedX = max(40, min(screenSize.width - 40, convertedPoint.x))
        let clampedY = max(40, min(screenSize.height - 40, convertedPoint.y))
        
        return CGPoint(x: clampedX, y: clampedY)
    }
}

// MARK: - 单个条码位置标记
struct CodePositionMarker: View {
    let code: DetectedCode
    let screenSize: CGSize
    let previewLayer: AVCaptureVideoPreviewLayer?
    let onCodeSelected: (DetectedCode) -> Void
    
    var body: some View {
        GeometryReader { geometry in
            let position = calculatePosition(screenSize: geometry.size)
            
            ZStack {
                // 触摸区域背景（透明，但可以接收触摸事件）
                Circle()
                    .fill(Color.clear)
                    .frame(width: 80, height: 80)
                    .contentShape(Circle())
                    .onTapGesture {
                        logDebug("🎯 CodePositionMarker 被点击！", className: "CodePositionMarker")
                        logDebug("  条码ID: \(code.id)", className: "CodePositionMarker")
                        logDebug("  条码类型: \(code.type)", className: "CodePositionMarker")
                        logDebug("  条码内容: \(code.content)", className: "CodePositionMarker")
                        logDebug("  点击位置: x=\(position.x), y=\(position.y)", className: "CodePositionMarker")
                        
                        // 添加触觉反馈
                        let impactFeedback = UIImpactFeedbackGenerator(style: .medium)
                        impactFeedback.impactOccurred()
                        
                        onCodeSelected(code)
                    }
                
                // 外圈
                Circle()
                    .stroke(Color.green, lineWidth: 3)
                    .frame(width: 40, height: 40)
                
                // 内圈
                Circle()
                    .fill(Color.green.opacity(0.3))
                    .frame(width: 20, height: 20)
                
                // 中心点
                Circle()
                    .fill(Color.green)
                    .frame(width: 6, height: 6)
            }
            .position(x: position.x, y: position.y)
            .zIndex(1001) // 确保触摸区域在最上层
            .onAppear {
                logDebug("CodePositionMarker appeared at: x=\(position.x), y=\(position.y)", className: "CodePositionMarker")
                logDebug("Screen size: \(geometry.size)", className: "CodePositionMarker")
                logDebug("Code bounds: \(code.bounds)", className: "CodePositionMarker")
            }
        }
    }
    
    private func calculatePosition(screenSize: CGSize) -> CGPoint {
        guard let previewLayer = previewLayer else {
            logWarning("No preview layer available, using screen center", className: "CodePositionMarker")
            return CGPoint(x: screenSize.width / 2, y: screenSize.height / 2)
        }
        
        guard previewLayer.session?.isRunning == true else {
            logWarning("Preview layer session not running, using screen center", className: "CodePositionMarker")
            return CGPoint(x: screenSize.width / 2, y: screenSize.height / 2)
        }
        
        let metadataObject = code.bounds
        let convertedPoint = previewLayer.layerPointConverted(fromCaptureDevicePoint: CGPoint(
            x: metadataObject.midX,
            y: metadataObject.midY
        ))
        
        guard convertedPoint.x.isFinite && convertedPoint.y.isFinite else {
            logWarning("Invalid converted point: \(convertedPoint), using screen center", className: "CodePositionMarker")
            return CGPoint(x: screenSize.width / 2, y: screenSize.height / 2)
        }
        
        let clampedX = max(20, min(screenSize.width - 20, convertedPoint.x))
        let clampedY = max(20, min(screenSize.height - 20, convertedPoint.y))
        
        logDebug("AVFoundation bounds: \(code.bounds)", className: "CodePositionMarker")
        logDebug("Converted point: \(convertedPoint)", className: "CodePositionMarker")
        logDebug("Screen size: \(screenSize)", className: "CodePositionMarker")
        logDebug("Clamped: x=\(clampedX), y=\(clampedY)", className: "CodePositionMarker")
        
        return CGPoint(x: clampedX, y: clampedY)
    }
}

// MARK: - 重新扫描按钮样式
struct RescanButtonStyle: ButtonStyle {
    func makeBody(configuration: Configuration) -> some View {
        configuration.label
            .scaleEffect(configuration.isPressed ? 0.95 : 1.0)
            .opacity(configuration.isPressed ? 0.8 : 1.0)
            .animation(.easeInOut(duration: 0.1), value: configuration.isPressed)
    }
}

// MARK: - 扫描线动画修饰符
struct ScanningLineModifier: ViewModifier {
    @State private var isAnimating = false
    
    func body(content: Content) -> some View {
        content
            .offset(y: isAnimating ? 150 : -150)
            .onAppear {
                withAnimation(
                    Animation.linear(duration: 2)
                        .repeatForever(autoreverses: false)
                ) {
                    isAnimating = true
                }
            }
    }
}

// MARK: - 脉冲动画修饰符
struct PulseAnimationModifier: ViewModifier {
    @State private var isPulsing = false
    
    func body(content: Content) -> some View {
        content
            .scaleEffect(isPulsing ? 1.5 : 1.0)
            .opacity(isPulsing ? 0.0 : 0.8)
            .onAppear {
                withAnimation(
                    Animation.easeInOut(duration: 1.5)
                        .repeatForever(autoreverses: false)
                ) {
                    isPulsing = true
                }
            }
    }
}

// MARK: - 扫描线样式枚举
enum ScanningLineStyle: String, CaseIterable {
    case modern = "style_modern"
    case classic = "style_classic"
    case neon = "style_neon"
    case minimal = "style_minimal"
    case retro = "style_retro"
    
    var localizedName: String {
        switch self {
        case .modern: return "style_modern".localized
        case .classic: return "style_classic".localized
        case .neon: return "style_neon".localized
        case .minimal: return "style_minimal".localized
        case .retro: return "style_retro".localized
        }
    }
}

// MARK: - 扫描线视图
struct ScanningLineView: View {
    let style: ScanningLineStyle
    
    var body: some View {
        Group {
            switch style {
            case .modern:
                ModernScanningLine()
            case .classic:
                ClassicScanningLine()
            case .neon:
                NeonScanningLine()
            case .minimal:
                MinimalScanningLine()
            case .retro:
                RetroScanningLine()
            }
        }
    }
}

// MARK: - 现代扫描线
struct ModernScanningLine: View {
    var body: some View {
        Rectangle()
            .fill(
                LinearGradient(
                    colors: [.blue, .cyan, .blue],
                    startPoint: .leading,
                    endPoint: .trailing
                )
            )
            .frame(width: 200, height: 3)
            .shadow(color: .blue, radius: 5, x: 0, y: 0)
            .modifier(ScanningLineModifier())
    }
}

// MARK: - 经典扫描线
struct ClassicScanningLine: View {
    var body: some View {
        Rectangle()
            .fill(Color.green)
            .frame(width: 150, height: 2)
            .modifier(ScanningLineModifier())
    }
}

// MARK: - 霓虹扫描线
struct NeonScanningLine: View {
    var body: some View {
        Rectangle()
            .fill(Color.purple)
            .frame(width: 180, height: 4)
            .shadow(color: .purple, radius: 8, x: 0, y: 0)
            .modifier(ScanningLineModifier())
    }
}

// MARK: - 极简扫描线
struct MinimalScanningLine: View {
    var body: some View {
        Rectangle()
            .fill(Color.white)
            .frame(width: 100, height: 1)
            .modifier(ScanningLineModifier())
    }
}

// MARK: - 复古扫描线
struct RetroScanningLine: View {
    var body: some View {
        HStack(spacing: 2) {
            ForEach(0..<5, id: \.self) { _ in
                Rectangle()
                    .fill(Color.orange)
                    .frame(width: 2, height: 20)
            }
        }
        .modifier(ScanningLineModifier())
    }
}

// MARK: - 检测到的条码数据结构
struct DetectedCode: Identifiable {
    let id = UUID()
    let type: String
    let content: String
    let bounds: CGRect
}

// MARK: - 通知名称扩展
extension Notification.Name {
    static let scannerDidScanCode = Notification.Name("scannerDidScanCode")
}

// MARK: - 相机权限视图
struct CameraPermissionView: View {
    let authorizationStatus: AVAuthorizationStatus
    let onRequestPermission: () -> Void
    let onOpenSettings: () -> Void
    
    var body: some View {
        VStack(spacing: 30) {
            Spacer()
            
            // 相机图标
            Image(systemName: "camera.fill")
                .font(.system(size: 80))
                .foregroundColor(.gray)
            
            // 标题
            Text("camera_permission_title".localized)
                .font(.largeTitle)
                .fontWeight(.bold)
                .multilineTextAlignment(.center)
            
            // 描述文本
            Text(getDescriptionText())
                .font(.body)
                .multilineTextAlignment(.center)
                .foregroundColor(.secondary)
                .padding(.horizontal, 40)
            
            // 操作按钮
            VStack(spacing: 15) {
                if authorizationStatus == .notDetermined {
                    Button(action: onRequestPermission) {
                        HStack {
                            Image(systemName: "camera.badge.ellipsis")
                            Text("request_camera_permission".localized)
                        }
                        .font(.headline)
                        .foregroundColor(.white)
                        .frame(maxWidth: .infinity)
                        .padding()
                        .background(Color.blue)
                        .cornerRadius(12)
                    }
                } else if authorizationStatus == .denied || authorizationStatus == .restricted {
                    Button(action: onOpenSettings) {
                        HStack {
                            Image(systemName: "gear")
                            Text("open_settings".localized)
                        }
                        .font(.headline)
                        .foregroundColor(.white)
                        .frame(maxWidth: .infinity)
                        .padding()
                        .background(Color.orange)
                        .cornerRadius(12)
                    }
                }
            }
            .padding(.horizontal, 40)
            
            Spacer()
        }
        .background(Color(.systemBackground))
    }
    
    private func getDescriptionText() -> String {
        switch authorizationStatus {
        case .notDetermined:
            return "camera_permission_description".localized
        case .denied:
            return "camera_permission_denied".localized
        case .restricted:
            return "camera_permission_restricted".localized
        default:
            return "camera_permission_unknown".localized
        }
    }
}

#if DEBUG
struct ScannerView_Previews: PreviewProvider {
    static var previews: some View {
        ScannerView()
    }
}
#endif