using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using PetWashControl.Models;
using PetWashControl.Services;
using System.Collections.ObjectModel;
using System.Text.Json;
using System.Windows;

namespace PetWashControl.ViewModels;

public partial class WashStep : ObservableObject
{
    [ObservableProperty]
    private string _name = "";

    [ObservableProperty]
    private string _status = "等待中";

    [ObservableProperty]
    private bool _isActive;
}

public partial class MainViewModel : ObservableObject
{
    private readonly ApiService _apiService;
    private readonly MqttClientService _mqttService;
    private readonly ConfigurationService _config;
    private readonly LogService _logger;

    public event Action<string>? ViewChanged;

    [ObservableProperty]
    private ObservableCollection<Package> _packages = new();

    [ObservableProperty]
    private Package? _selectedPackage;

    [ObservableProperty]
    private Order? _currentOrder;

    [ObservableProperty]
    private string _statusMessage = "系统就绪";

    [ObservableProperty]
    private bool _isDoorOpen;

    [ObservableProperty]
    private bool _isWashing;

    [ObservableProperty]
    private bool _isConnected;

    [ObservableProperty]
    private string _currentView = "Idle";

    private string _previousView = "Idle"; // 保存进入设置前的视图

    [ObservableProperty]
    private int _washProgress;

    [ObservableProperty]
    private string _currentStep = "";

    [ObservableProperty]
    private string _remainingTime = "00:00";

    [ObservableProperty]
    private ObservableCollection<WashStep> _washSteps = new();

    [ObservableProperty]
    private double _waterTemperature = 40.0;

    [ObservableProperty]
    private double _roomTemperature = 25.0;

    [ObservableProperty]
    private string _currentCarouselImage = "/Images/dog.png";

    [ObservableProperty]
    private string _deviceNumber = "设备编号: PW-001";

    [ObservableProperty]
    private string _currentDateTime = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");

    [ObservableProperty]
    private string _currentDayOfWeek = DateTime.Now.ToString("dddd", new System.Globalization.CultureInfo("zh-CN"));

    private readonly System.Timers.Timer _carouselTimer;
    private readonly System.Timers.Timer _clockTimer;
    private readonly string[] _carouselImages = { "/Images/dog.png", "/Images/dog1.jpg" };
    private int _currentImageIndex = 0;

    public MainViewModel()
    {
        _config = new ConfigurationService();
        _logger = new LogService();
        _apiService = new ApiService(_config);
        _mqttService = new MqttClientService(_config);
        _mqttService.MessageReceived += OnMqttMessageReceived;
        
        // 初始化洗护步骤
        InitializeWashSteps();

        // 初始化图片轮播定时器（每5秒切换）
        _carouselTimer = new System.Timers.Timer(5000);
        _carouselTimer.Elapsed += (s, e) => 
        {
            Application.Current.Dispatcher.Invoke(() =>
            {
                _currentImageIndex = (_currentImageIndex + 1) % _carouselImages.Length;
                CurrentCarouselImage = _carouselImages[_currentImageIndex];
            });
        };
        _carouselTimer.Start();

        // 初始化时钟定时器（每秒更新）
        _clockTimer = new System.Timers.Timer(1000);
        _clockTimer.Elapsed += (s, e) =>
        {
            Application.Current.Dispatcher.Invoke(() =>
            {
                var now = DateTime.Now;
                CurrentDateTime = now.ToString("yyyy-MM-dd HH:mm:ss");
                CurrentDayOfWeek = now.ToString("dddd", new System.Globalization.CultureInfo("zh-CN"));
            });
        };
        _clockTimer.Start();
    }

    private void InitializeWashSteps()
    {
        WashSteps.Add(new WashStep { Name = "第一次冲水", Status = "等待中" });
        WashSteps.Add(new WashStep { Name = "沐浴露喷洒", Status = "等待中" });
        WashSteps.Add(new WashStep { Name = "第二次冲水", Status = "等待中" });
        WashSteps.Add(new WashStep { Name = "香波喷洒", Status = "等待中" });
        WashSteps.Add(new WashStep { Name = "第三次冲水", Status = "等待中" });
        WashSteps.Add(new WashStep { Name = "热风吹毛", Status = "等待中" });
        WashSteps.Add(new WashStep { Name = "冷热风混合", Status = "等待中" });
    }

    public async Task InitializeAsync()
    {
        try
        {
            _logger.LogInfo("开始初始化系统...");
            
            await _mqttService.ConnectAsync();
            IsConnected = _mqttService.IsConnected;
            _logger.LogInfo("MQTT连接成功");
            
            await LoadPackagesAsync();
            StatusMessage = "系统就绪，请点击开始";
            _logger.LogInfo("系统初始化完成");
        }
        catch (Exception ex)
        {
            _logger.LogError("初始化失败", ex);
            StatusMessage = $"初始化失败: {ex.Message}";
            MessageBox.Show($"系统初始化失败，请检查后端服务是否启动。\n\n错误: {ex.Message}", 
                          "错误", MessageBoxButton.OK, MessageBoxImage.Error);
        }
    }

    [RelayCommand]
    private async Task LoadPackagesAsync()
    {
        try
        {
            _logger.LogInfo("加载套餐列表...");
            var packages = await _apiService.GetPackagesAsync();
            Packages.Clear();
            foreach (var package in packages)
            {
                Packages.Add(package);
            }
            _logger.LogInfo($"成功加载 {packages.Count} 个套餐");
        }
        catch (Exception ex)
        {
            _logger.LogError("加载套餐失败", ex);
            StatusMessage = $"加载套餐失败: {ex.Message}";
        }
    }

    [RelayCommand]
    private void ShowPayment()
    {
        CurrentView = "Payment";
        ViewChanged?.Invoke("Payment");
        StatusMessage = "请选择套餐";
        _logger.LogInfo("切换到支付界面");
    }

    [RelayCommand]
    private void ShowSettings()
    {
        // 保存当前视图状态
        _previousView = CurrentView;
        
        CurrentView = "Settings";
        ViewChanged?.Invoke("Settings");
        StatusMessage = "系统设置";
        _logger.LogInfo($"切换到设置界面，之前的视图: {_previousView}");
    }

    [RelayCommand]
    private void BackToIdle()
    {
        // 如果从设置页面返回，且之前不是待机界面，则返回到之前的视图
        if (CurrentView == "Settings" && _previousView != "Idle" && _previousView != "Settings")
        {
            CurrentView = _previousView;
            ViewChanged?.Invoke(_previousView);
            
            // 根据返回的视图设置相应的状态消息
            switch (_previousView)
            {
                case "Washing":
                    StatusMessage = "洗护进行中...";
                    _logger.LogInfo("从设置返回到洗护界面");
                    break;
                case "Payment":
                    StatusMessage = "请选择套餐";
                    _logger.LogInfo("从设置返回到支付界面");
                    break;
                case "QRCode":
                    StatusMessage = $"请扫码支付 ¥{SelectedPackage?.Price}";
                    _logger.LogInfo("从设置返回到二维码支付界面");
                    break;
                default:
                    StatusMessage = "系统就绪，请点击开始";
                    _logger.LogInfo("从设置返回到待机界面");
                    break;
            }
            
            // 重置之前的视图状态
            _previousView = "Idle";
            return;
        }
        
        // 默认返回到待机界面
        CurrentView = "Idle";
        ViewChanged?.Invoke("Idle");
        StatusMessage = "系统就绪，请点击开始";
        SelectedPackage = null;
        CurrentOrder = null;
        IsDoorOpen = false;
        
        // 重置洗护步骤状态
        foreach (var step in WashSteps)
        {
            step.Status = "等待中";
            step.IsActive = false;
        }
        
        _previousView = "Idle";
        _logger.LogInfo("返回待机界面");
    }

    [RelayCommand]
    private async Task SelectPackage(Package package)
    {
        if (package == null) return;

        SelectedPackage = package;
        _logger.LogInfo($"选择套餐: {package.Name}");

        try
        {
            // 创建订单
            CurrentOrder = await _apiService.CreateOrderAsync(package.Id);
            StatusMessage = $"订单创建成功，请扫码支付 ¥{package.Price}";
            _logger.LogInfo($"订单创建成功，订单ID: {CurrentOrder?.Id}");

            // 切换到二维码支付界面
            CurrentView = "QRCode";
            ViewChanged?.Invoke("QRCode");
        }
        catch (Exception ex)
        {
            _logger.LogError("创建订单失败", ex);
            StatusMessage = $"创建订单失败: {ex.Message}";
            MessageBox.Show($"创建订单失败\n\n{ex.Message}", "错误", 
                          MessageBoxButton.OK, MessageBoxImage.Error);
        }
    }

    [RelayCommand]
    private void CancelPayment()
    {
        _logger.LogInfo("取消支付");
        CurrentOrder = null;
        SelectedPackage = null;
        CurrentView = "Payment";
        ViewChanged?.Invoke("Payment");
        StatusMessage = "已取消支付，请重新选择套餐";
    }

    [RelayCommand]
    private async Task CreateOrderAsync()
    {
        if (SelectedPackage == null)
        {
            MessageBox.Show("请先选择套餐", "提示", MessageBoxButton.OK, MessageBoxImage.Information);
            return;
        }

        try
        {
            _logger.LogInfo($"创建订单，套餐ID: {SelectedPackage.Id}");
            CurrentOrder = await _apiService.CreateOrderAsync(SelectedPackage.Id);
            StatusMessage = $"订单创建成功，订单号: {CurrentOrder?.Id}，请支付 ¥{SelectedPackage.Price}";
            _logger.LogInfo($"订单创建成功，订单ID: {CurrentOrder?.Id}");
        }
        catch (Exception ex)
        {
            _logger.LogError("创建订单失败", ex);
            StatusMessage = $"创建订单失败: {ex.Message}";
            MessageBox.Show($"创建订单失败\n\n{ex.Message}", "错误", 
                          MessageBoxButton.OK, MessageBoxImage.Error);
        }
    }

    [RelayCommand]
    private async Task SimulatePaymentAsync()
    {
        if (CurrentOrder == null)
        {
            MessageBox.Show("请先创建订单", "提示", MessageBoxButton.OK, MessageBoxImage.Information);
            return;
        }

        try
        {
            _logger.LogInfo($"模拟支付，订单ID: {CurrentOrder.Id}");
            
            // 模拟支付处理延迟
            StatusMessage = "正在处理支付...";
            await Task.Delay(1500);
            
            // 确认支付
            CurrentOrder = await _apiService.ConfirmPaymentAsync(CurrentOrder.Id);
            StatusMessage = "支付成功！设备门已打开，请将宠物放入";
            IsDoorOpen = true;
            _logger.LogInfo("支付成功，门已打开");

            // 显示支付成功提示
            MessageBox.Show("支付成功！\n\n设备门已自动打开\n请将宠物放入设备后关闭门开始洗护", 
                          "支付成功", MessageBoxButton.OK, MessageBoxImage.Information);

            // 返回待机界面，显示关门按钮
            CurrentView = "Idle";
            ViewChanged?.Invoke("Idle");
        }
        catch (Exception ex)
        {
            _logger.LogError("支付失败", ex);
            StatusMessage = $"支付失败: {ex.Message}";
            MessageBox.Show($"支付失败\n\n{ex.Message}", "错误", 
                          MessageBoxButton.OK, MessageBoxImage.Error);
        }
    }

    [RelayCommand]
    private async Task CloseDoorAsync()
    {
        if (CurrentOrder == null || !IsDoorOpen)
        {
            MessageBox.Show("门未打开", "提示", MessageBoxButton.OK, MessageBoxImage.Information);
            return;
        }

        try
        {
            _logger.LogInfo($"关门，订单ID: {CurrentOrder.Id}");
            
            // 通过MQTT发送关门状态
            await _mqttService.PublishAsync("device/status", new
            {
                status = "door_closed",
                orderId = CurrentOrder.Id,
                timestamp = DateTime.Now
            });

            // 更新订单状态
            CurrentOrder = await _apiService.UpdateOrderStatusAsync(CurrentOrder.Id, OrderStatus.DoorClosed);
            
            IsDoorOpen = false;
            StatusMessage = "门已关闭，清洗即将开始...";
            _logger.LogInfo("门已关闭，等待清洗开始");

            // 切换到洗护界面
            CurrentView = "Washing";
            ViewChanged?.Invoke("Washing");
            IsWashing = true;
            CurrentStep = "第一次冲水";
            WashProgress = 0;

            // 开始模拟洗护流程
            _ = SimulateWashingProcessAsync();
        }
        catch (Exception ex)
        {
            _logger.LogError("关门失败", ex);
            StatusMessage = $"关门失败: {ex.Message}";
            MessageBox.Show($"关门失败\n\n{ex.Message}", "错误", 
                          MessageBoxButton.OK, MessageBoxImage.Error);
        }
    }

    private async Task SimulateWashingProcessAsync()
    {
        try
        {
            var steps = new[]
            {
                ("第一次冲水", 120),
                ("沐浴露喷洒", 30),
                ("第二次冲水", 180),
                ("香波喷洒", 30),
                ("第三次冲水", 180),
                ("热风吹毛", 300),
                ("冷热风混合", 120)
            };

            int totalDuration = steps.Sum(s => s.Item2);
            int elapsed = 0;

            for (int stepIndex = 0; stepIndex < steps.Length; stepIndex++)
            {
                var (stepName, duration) = steps[stepIndex];
                CurrentStep = stepName;
                _logger.LogInfo($"开始步骤: {stepName}");

                // 更新步骤状态
                Application.Current.Dispatcher.Invoke(() =>
                {
                    // 标记之前的步骤为已完成
                    for (int i = 0; i < stepIndex; i++)
                    {
                        WashSteps[i].Status = "已完成";
                        WashSteps[i].IsActive = false;
                    }
                    
                    // 标记当前步骤为进行中
                    WashSteps[stepIndex].Status = "进行中";
                    WashSteps[stepIndex].IsActive = true;
                    
                    // 标记后续步骤为等待中
                    for (int i = stepIndex + 1; i < WashSteps.Count; i++)
                    {
                        WashSteps[i].Status = "等待中";
                        WashSteps[i].IsActive = false;
                    }
                });

                for (int i = 0; i <= duration; i++)
                {
                    if (!IsWashing) return; // 如果被停止，退出

                    elapsed++;
                    WashProgress = (int)((double)elapsed / totalDuration * 100);
                    
                    int remaining = totalDuration - elapsed;
                    int minutes = remaining / 60;
                    int seconds = remaining % 60;
                    RemainingTime = $"{minutes:D2}:{seconds:D2}";

                    // 模拟温度变化
                    UpdateTemperatures(stepName, i, duration);

                    await Task.Delay(100); // 加速模拟，实际应为1000ms
                }
            }

            // 标记所有步骤为已完成
            Application.Current.Dispatcher.Invoke(() =>
            {
                foreach (var step in WashSteps)
                {
                    step.Status = "已完成";
                    step.IsActive = false;
                }
            });

            // 洗护完成
            await CompleteWashingAsync();
        }
        catch (Exception ex)
        {
            _logger.LogError("洗护流程失败", ex);
            StatusMessage = $"洗护流程失败: {ex.Message}";
        }
    }

    private async Task CompleteWashingAsync()
    {
        if (CurrentOrder == null) return;

        try
        {
            _logger.LogInfo($"清洗完成，订单ID: {CurrentOrder.Id}");
            
            // 发送清洗完成状态
            await _mqttService.PublishAsync("device/status", new
            {
                status = "completed",
                orderId = CurrentOrder.Id,
                timestamp = DateTime.Now
            });

            CurrentOrder = await _apiService.UpdateOrderStatusAsync(CurrentOrder.Id, OrderStatus.Completed);
            
            IsWashing = false;
            IsDoorOpen = true;
            StatusMessage = "清洗完成！请取出宠物";
            
            MessageBox.Show("清洗完成！\n\n感谢使用无人自动洗宠机", "完成", 
                          MessageBoxButton.OK, MessageBoxImage.Information);
            
            _logger.LogInfo("订单流程完成");

            // 返回待机界面
            CurrentOrder = null;
            SelectedPackage = null;
            BackToIdle();
        }
        catch (Exception ex)
        {
            _logger.LogError("完成流程失败", ex);
            StatusMessage = $"完成流程失败: {ex.Message}";
        }
    }

    private void OnMqttMessageReceived(string topic, string payload)
    {
        Application.Current.Dispatcher.Invoke(() =>
        {
            try
            {
                _logger.LogInfo($"收到MQTT消息 - Topic: {topic}, Payload: {payload}");
                var message = JsonSerializer.Deserialize<JsonElement>(payload);

                if (topic == "device/command")
                {
                    var command = message.GetProperty("command").GetString();
                    
                    if (command == "open_door")
                    {
                        IsDoorOpen = true;
                        StatusMessage = "设备门已打开，请将宠物放入后点击关门";
                        _logger.LogInfo("收到开门指令");
                    }
                    else if (command == "start_wash")
                    {
                        IsWashing = true;
                        var duration = message.GetProperty("durationMinutes").GetInt32();
                        StatusMessage = $"清洗已开始，预计 {duration} 分钟完成";
                        _logger.LogInfo($"收到开始清洗指令，时长: {duration}分钟");
                    }
                }
                else if (topic == "device/status")
                {
                    var status = message.GetProperty("status").GetString();
                    StatusMessage = $"设备状态: {status}";
                    _logger.LogInfo($"设备状态更新: {status}");
                }
            }
            catch (Exception ex)
            {
                _logger.LogError("处理MQTT消息失败", ex);
                StatusMessage = $"处理消息失败: {ex.Message}";
            }
        });
    }

    private void UpdateTemperatures(string stepName, int currentTime, int totalTime)
    {
        // 根据不同步骤模拟温度变化
        var random = new Random();
        double progress = (double)currentTime / totalTime;

        switch (stepName)
        {
            case "第一次冲水":
            case "第二次冲水":
            case "第三次冲水":
                // 冲水阶段：水温在38-42度之间波动
                WaterTemperature = 40.0 + (random.NextDouble() - 0.5) * 4;
                RoomTemperature = 25.0 + (random.NextDouble() - 0.5) * 2;
                break;

            case "沐浴露喷洒":
            case "香波喷洒":
                // 喷洒阶段：水温略低
                WaterTemperature = 38.0 + (random.NextDouble() - 0.5) * 2;
                RoomTemperature = 25.0 + (random.NextDouble() - 0.5) * 2;
                break;

            case "热风吹毛":
                // 热风阶段：水温降低，室温升高
                WaterTemperature = 35.0 - progress * 10 + (random.NextDouble() - 0.5) * 2;
                RoomTemperature = 25.0 + progress * 8 + (random.NextDouble() - 0.5) * 2;
                break;

            case "冷热风混合":
                // 混合风阶段：温度逐渐降低
                WaterTemperature = 25.0 + (random.NextDouble() - 0.5) * 2;
                RoomTemperature = 30.0 - progress * 5 + (random.NextDouble() - 0.5) * 2;
                break;

            default:
                // 默认温度
                WaterTemperature = 40.0 + (random.NextDouble() - 0.5) * 2;
                RoomTemperature = 25.0 + (random.NextDouble() - 0.5) * 2;
                break;
        }

        // 确保温度在合理范围内
        WaterTemperature = Math.Max(20, Math.Min(45, WaterTemperature));
        RoomTemperature = Math.Max(20, Math.Min(35, RoomTemperature));
    }
}