using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

using Microsoft.Win32;

using Melskin.Assets;

namespace VibeWPFTest;
/// <summary>
/// IconsWindow.xaml 的交互逻辑
/// </summary>
public partial class IconsWindow : INotifyPropertyChanged
{
    // 1. 一个私有的、包含所有图标的原始数据集合
    private readonly ObservableCollection<MaterialSymbol> _allSymbols = new ObservableCollection<MaterialSymbol>();

    // 2. 一个公开的 ICollectionView，UI 将绑定到这个视图
    public ICollectionView SymbolCollectionView { get; }

    private string _selectedSymbolName;
    public string SelectedSymbolName
    {
        get => _selectedSymbolName;
        set { _selectedSymbolName = value; OnPropertyChanged(nameof(SelectedSymbolName)); }
    }

    private string _searchText = string.Empty;
    // 3. 绑定到搜索框的属性
    public string SearchText
    {
        get => _searchText;
        set
        {
            if (_searchText == value) return;
            _searchText = value;
            OnPropertyChanged(nameof(SearchText));

            // 关键点: 当搜索文本改变时，刷新视图以重新应用筛选
            SymbolCollectionView.Refresh();
        }
    }

    public IconsWindow()
    {
        InitializeComponent();

        // 从枚举加载所有图标到原始集合
        LoadSymbols();

        // 4. 初始化视图
        SymbolCollectionView = CollectionViewSource.GetDefaultView(_allSymbols);

        // 5. 为视图指定筛选逻辑
        SymbolCollectionView.Filter = FilterSymbols;

        this.DataContext = this;
    }

    private void LoadSymbols()
    {
        var symbols = Enum.GetValues(typeof(MaterialSymbol)).Cast<MaterialSymbol>();
        _allSymbols.Clear();
        foreach (var symbol in symbols)
        {
            _allSymbols.Add(symbol);
        }
    }

    // 6. 筛选方法的具体实现
    private bool FilterSymbols(object item)
    {
        // 如果搜索框为空，则不过滤，显示所有项
        if (string.IsNullOrEmpty(SearchText))
        {
            return true;
        }

        // 如果项是 MaterialSymbol 类型
        if (item is MaterialSymbol symbol)
        {
            // 检查枚举的名称（不区分大小写）是否包含搜索文本
            return symbol.ToString().IndexOf(SearchText, StringComparison.OrdinalIgnoreCase) >= 0;
        }

        return false;
    }

    // *** 选择修复: 直接从事件参数 e 中获取选中的项 ***
    private void IconItemsControl_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        // 检查 e.AddedItems 是否有内容。AddedItems 包含了新选中的项。
        if (e.AddedItems.Count > 0 && e.AddedItems[0] is MaterialSymbol selectedSymbol)
        {
            string xamlCode = $"<n:IconElement Symbol=\"{selectedSymbol}\" Foreground=\"{ColorPicker.SelectedColor}\"/>";
            SelectedSymbolName = xamlCode;

        }
        // 如果列表被清空或选择被取消，e.AddedItems 为空
        else if (IconItemsControl.SelectedItem == null)
        {
            SelectedSymbolName = string.Empty;
        }
    }

    private void CopyCode_Click(object sender, RoutedEventArgs e)
    {
        if (!string.IsNullOrEmpty(SelectedSymbolName))
        {
            //string xamlCode = $"<local:SymbolIcon Symbol=\"{SelectedSymbolName}\" />";

            Clipboard.SetText(SelectedSymbolName);
            //MessageBox.Show($"代码已复制到剪贴板!\n\n{SelectedSymbolName}", "成功", MessageBoxButton.OK, MessageBoxImage.Information);
        }
        else
        {
            MessageBox.Show("请先选择一个图标。", "提示", MessageBoxButton.OK, MessageBoxImage.Warning);
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}