using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Globalization;
using System.IO;
using System.Net.Http;
using System.Windows;
using System.Windows.Data;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using BetterGenshinImpact.ViewModel.Windows.GearTask;
using BetterGenshinImpact.ViewModel.Pages.Component;
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.PixelFormats;
using Wpf.Ui.Controls;
using Wpf.Ui.Violeta.Controls;
using Image = SixLabors.ImageSharp.Image;

namespace BetterGenshinImpact.View.Windows.GearTask;

/// <summary>
/// 地图追踪任务选择窗口
/// </summary>
public partial class PathingTaskSelectionWindow : FluentWindow
{
    /// <summary>
    /// ViewModel
    /// </summary>
    public PathingTaskSelectionViewModel ViewModel { get; }

    /// <summary>
    /// 选中的任务
    /// </summary>
    public PathingTaskInfo? SelectedTask { get; private set; }
    
    /// <summary>
    /// 选中的任务
    /// </summary>
    public GearTaskViewModel? SelectedGearTask { get; private set; }


    /// <summary>
    /// 对话框结果
    /// </summary>
    public bool DialogResult { get; private set; }

    /// <summary>
    /// 目录到符号图标的转换器
    /// </summary>
    public static readonly DirectoryToSymbolConverter DirectoryToSymbolConverter = new();

    public PathingTaskSelectionWindow()
    {
        ViewModel = new PathingTaskSelectionViewModel();
        DataContext = ViewModel;
        InitializeComponent();
        
        // 绑定TreeView的选中项变化事件
        TaskTreeView.SelectedItemChanged += OnTreeViewSelectedItemChanged;
        
        // 订阅任务添加事件
        ViewModel.OnTaskAdded += OnTaskAdded;
    }
    
    /// <summary>
    /// 任务添加事件处理
    /// </summary>
    private void OnTaskAdded(GearTaskViewModel? task)
    {
        SelectedGearTask = task;

        // 添加任务后自动关闭窗口
        CloseWithResult();
    }
    
    /// <summary>
    /// TreeView选中项变化事件处理
    /// </summary>
    private void OnTreeViewSelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)
    {
        if (e.NewValue is PathingTaskInfo selectedTask)
        {
            ViewModel.SelectedTask = selectedTask;
        }
    }

    /// <summary>
    /// 任务添加完成后关闭窗口
    /// </summary>
    public void CloseWithResult()
    {
        SelectedTask = ViewModel.SelectedTask;
        DialogResult = true;
        Close();
    }

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

/// <summary>
/// 目录到符号图标的转换器
/// </summary>
public class DirectoryToSymbolConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        if (value is bool isDirectory)
        {
            return isDirectory ? SymbolRegular.Folder24 : SymbolRegular.Document24;
        }
        return SymbolRegular.Document24;
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

/// <summary>
/// 布尔值到可见性的转换器（支持参数反转）
/// </summary>
public class BooleanToVisibilityParameterConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        if (value is bool boolValue)
        {
            bool invert = parameter?.ToString() == "Invert";
            if (invert)
                boolValue = !boolValue;
            return boolValue ? Visibility.Visible : Visibility.Collapsed;
        }
        return Visibility.Visible;
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

/// <summary>
/// 布尔值到可见性的反向转换器
/// </summary>
public class BooleanToVisibilityInvertConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        if (value is bool boolValue)
        {
            return boolValue ? Visibility.Collapsed : Visibility.Visible;
        }
        return Visibility.Visible;
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

/// <summary>
/// 空值到可见性的转换器
/// </summary>
public class NullToVisibilityConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        bool invert = parameter?.ToString() == "Invert";
        bool isNull = value == null;
        
        if (invert)
            isNull = !isNull;
            
        return isNull ? Visibility.Collapsed : Visibility.Visible;
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

// /// <summary>
// /// 字符串到ImageSource的转换器，处理空字符串情况，支持WebP格式
// /// </summary>
// public class StringToImageSourceConverter : IValueConverter
// {
//     private static readonly HttpClient HttpClient = new();
//
//     public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
//     {
//         if (value is string url && !string.IsNullOrEmpty(url))
//         {
//             try
//             {
//                 // 检查是否为WebP格式或其他需要特殊处理的格式
//                 if (url.Contains(".webp", StringComparison.OrdinalIgnoreCase))
//                 {
//                     return LoadWebPImage(url);
//                 }
//                 else
//                 {
//                     // 对于其他格式，使用原有的BitmapImage
//                     return new BitmapImage(new Uri(url));
//                 }
//             }
//             catch (Exception e)
//             {
//                 Debug.WriteLine(e);
//                 return null;
//             }
//         }
//         return null;
//     }
//
//     private static BitmapSource? LoadWebPImage(string url)
//     {
//         try
//         {
//             byte[] imageData;
//             
//             if (url.StartsWith("http", StringComparison.OrdinalIgnoreCase))
//             {
//                 // 从网络加载
//                 imageData = HttpClient.GetByteArrayAsync(url).Result;
//             }
//             else
//             {
//                 // 从本地文件加载
//                 imageData = File.ReadAllBytes(url);
//             }
//
//             using var image = Image.Load<Rgba32>(imageData);
//             
//             // 转换为WPF可用的BitmapSource
//             var bitmap = new WriteableBitmap(image.Width, image.Height, 96, 96, PixelFormats.Bgra32, null);
//             
//             bitmap.Lock();
//             try
//             {
//                 var backBuffer = bitmap.BackBuffer;
//                 var stride = bitmap.BackBufferStride;
//                 
//                 image.ProcessPixelRows(accessor =>
//                 {
//                     for (int y = 0; y < accessor.Height; y++)
//                     {
//                         var pixelRow = accessor.GetRowSpan(y);
//                         var targetPtr = backBuffer + y * stride;
//                         
//                         for (int x = 0; x < pixelRow.Length; x++)
//                         {
//                             var pixel = pixelRow[x];
//                             // 转换RGBA到BGRA
//                             var bgra = (pixel.A << 24) | (pixel.R << 16) | (pixel.G << 8) | pixel.B;
//                             System.Runtime.InteropServices.Marshal.WriteInt32(targetPtr + x * 4, bgra);
//                         }
//                     }
//                 });
//             }
//             finally
//             {
//                 bitmap.AddDirtyRect(new Int32Rect(0, 0, image.Width, image.Height));
//                 bitmap.Unlock();
//             }
//             
//             return bitmap;
//         }
//         catch (Exception e)
//         {
//             Debug.WriteLine($"Failed to load WebP image: {e}");
//             return null;
//         }
//     }
//
//     public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
//     {
//         throw new NotImplementedException();
//     }
// }