using DeviceService.Core;
using DeviceService.Device;
using System.Windows;
using System.Windows.Controls;

namespace DeviceService;

/// <summary>
/// 添加设备弹窗：从 AllDeviceType 中选择设备类型，
/// 选型后在下方加载该设备类型对应的配置 UserControl，确定后交回设备实例。
/// </summary>
public partial class AddDeviceWindow : Window
{
    private IDevice? _device;

    /// <summary>点击确定后返回待添加的设备实例；取消时为 null。</summary>
    public IDevice? Device { get; private set; }

    public AddDeviceWindow()
    {
        InitializeComponent();
        TypeCombo.ItemsSource = DeviceHelper.AllDeviceType;
    }

    private void TypeCombo_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        _device = null;
        ControlHost.Content = null;

        if (TypeCombo.SelectedItem is string type
            && DeviceHelper.TryCreateDevice(type, out IDevice? device)
            && device != null)
        {
            // 默认 Id：类型名-序号，可在配置控件中看到
            int seq = DeviceManager.Devices.Count(d => d.Type == type) + 1;
            SetDeviceId(device, $"{type}-{seq}");
            _device = device;

            UserControl? control = DeviceConfigControlFactory.Create(device);
            if (control == null)
            {
                ControlHost.Content = new TextBlock
                {
                    Text = $"未找到 {device.GetType().Name}ConfigControl，该设备类型暂无配置界面。",
                    Margin = new Thickness(8),
                    TextWrapping = TextWrapping.Wrap,
                    TextAlignment = TextAlignment.Center,
                    VerticalAlignment = VerticalAlignment.Center
                };
            }
            else
            {
                control.DataContext = device;
                ControlHost.Content = control;
            }
        }

        OkButton.IsEnabled = _device != null;
    }

    private void OkButton_Click(object sender, RoutedEventArgs e)
    {
        if (_device == null)
        {
            return;
        }

        string id = _device.DeviceId;
        if (string.IsNullOrWhiteSpace(id))
        {
            MessageBox.Show(this, "设备 ID 不能为空。", "添加设备",
                MessageBoxButton.OK, MessageBoxImage.Warning);
            return;
        }

        if (DeviceManager.Devices.Any(d => d.DeviceId == id))
        {
            MessageBox.Show(this, $"设备 ID \"{id}\" 已存在，请修改后重试。", "添加设备",
                MessageBoxButton.OK, MessageBoxImage.Warning);
            return;
        }

        Device = _device;
        DialogResult = true;
    }

    private void CancelButton_Click(object sender, RoutedEventArgs e)
    {
        DialogResult = false;
    }

    /// <summary>IDevice 接口只暴露 Id getter，实际实现类一般有 setter，通过反射赋值。</summary>
    private static void SetDeviceId(IDevice device, string id)
    {
        device.GetType().GetProperty(nameof(IDevice.DeviceId))?.SetValue(device, id);
    }
}