using System;
using System.Collections.Specialized;
using System.Globalization;
using System.Windows;
using System.Windows.Data;
using System.Windows.Interop;
using PersonalToolBox.Helpers;
using PersonalToolBox.ViewModels;

namespace PersonalToolBox.Views;

public partial class MainWindow : Window
{
    private readonly MainViewModel _viewModel;
    private readonly HotKeyManager _hotKeyManager;

    public MainWindow(MainViewModel viewModel, HotKeyManager hotKeyManager)
    {
        InitializeComponent();

        _viewModel = viewModel;
        _hotKeyManager = hotKeyManager;
        DataContext = viewModel;

        viewModel.Logs.CollectionChanged += OnLogsCollectionChanged;
    }

    /// <summary>
    /// 窗口句柄就绪后注册全局快捷键
    /// </summary>
    protected override void OnSourceInitialized(EventArgs e)
    {
        base.OnSourceInitialized(e);

        var hwndSource = (HwndSource)PresentationSource.FromVisual(this)!;
        _hotKeyManager.Initialize(hwndSource.Handle);

        // 挂载 WndProc 钩子，拦截 WM_HOTKEY 消息
        hwndSource.AddHook(WndProcHook);

        // 注册所有已配置快捷键的工具
        _viewModel.RegisterAllHotKeys();
    }

    /// <summary>
    /// 窗口消息钩子
    /// </summary>
    private IntPtr WndProcHook(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
    {
        handled = _hotKeyManager.TryHandleMessage(msg, wParam, lParam);
        return IntPtr.Zero;
    }

    private void OnLogsCollectionChanged(object? sender, NotifyCollectionChangedEventArgs e)
    {
        if (e.Action == NotifyCollectionChangedAction.Add && LogListBox.Items.Count > 0)
        {
            Dispatcher.BeginInvoke(new Action(() =>
            {
                LogListBox.ScrollIntoView(LogListBox.Items[^1]);
            }), System.Windows.Threading.DispatcherPriority.Background);
        }
    }
}

/// <summary>
/// bool → double: true=1.0, false=0.4 (工具卡片失效时置灰)
/// </summary>
public class BoolToOpacityConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return value is bool b && b ? 1.0 : 0.4;
    }

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

/// <summary>
/// string → string: 取字符串首字符作为图标占位
/// </summary>
public class FirstCharConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        var s = value as string;
        return string.IsNullOrEmpty(s) ? "?" : s[0].ToString();
    }

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