using FluidExplorer.Services;
using FluidExplorer.ViewModels;
using Microsoft.UI.Xaml.Controls;

namespace FluidExplorer.Views;

/// <summary>设置对话框：改动即时生效并写入 settings.json。</summary>
public sealed partial class SettingsDialog : ContentDialog
{
    private readonly MainViewModel _main;
    private bool _initializing = true;

    public SettingsDialog(MainViewModel main)
    {
        _main = main;
        InitializeComponent();

        ThemeBox.SelectedIndex = main.ThemeMode switch
        {
            AppThemeMode.Light => 1,
            AppThemeMode.Dark => 2,
            _ => 0
        };
        AnimationSwitch.IsOn = main.AnimationsEnabled;
        HiddenSwitch.IsOn = main.ShowHiddenFiles;
        SystemSwitch.IsOn = main.ShowSystemFiles;
        ExtensionSwitch.IsOn = main.ShowFileExtensions;
        CheckBoxSwitch.IsOn = main.AlwaysShowCheckBoxes;
        NewTabSwitch.IsOn = main.Settings.OpenFoldersInNewTab;
        ScopeSwitch.IsOn = main.SearchInCurrentFolderOnly;
        AsYouTypeSwitch.IsOn = main.Settings.SearchAsYouType;
        IndexStartupSwitch.IsOn = main.Settings.IndexOnStartup;
        RecycleSwitch.IsOn = main.DeleteToRecycleBin;
        ConflictBox.SelectedIndex = main.Settings.DefaultConflictPolicy switch
        {
            ConflictPolicySetting.Replace => 1,
            ConflictPolicySetting.Skip => 2,
            ConflictPolicySetting.KeepBoth => 3,
            _ => 0
        };
        IndexStatusText.Text = $"{main.IndexSummary}（{Environment.ProcessorCount} 核并行扫描；NTFS 索引可让全盘搜索稳定在毫秒级）";
        _initializing = false;
    }

    private void OnThemeChanged(object sender, SelectionChangedEventArgs e)
    {
        if (_initializing) return;
        _main.ThemeMode = ThemeBox.SelectedIndex switch
        {
            1 => AppThemeMode.Light,
            2 => AppThemeMode.Dark,
            _ => AppThemeMode.System
        };
    }

    private void OnAnimationToggled(object sender, Microsoft.UI.Xaml.RoutedEventArgs e)
    {
        if (_initializing) return;
        _main.AnimationsEnabled = AnimationSwitch.IsOn;
    }

    private void OnHiddenToggled(object sender, Microsoft.UI.Xaml.RoutedEventArgs e)
    {
        if (_initializing) return;
        _main.ShowHiddenFiles = HiddenSwitch.IsOn;
    }

    private void OnSystemToggled(object sender, Microsoft.UI.Xaml.RoutedEventArgs e)
    {
        if (_initializing) return;
        _main.ShowSystemFiles = SystemSwitch.IsOn;
    }

    private void OnExtensionToggled(object sender, Microsoft.UI.Xaml.RoutedEventArgs e)
    {
        if (_initializing) return;
        _main.ShowFileExtensions = ExtensionSwitch.IsOn;
    }

    private void OnCheckBoxToggled(object sender, Microsoft.UI.Xaml.RoutedEventArgs e)
    {
        if (_initializing) return;
        _main.AlwaysShowCheckBoxes = CheckBoxSwitch.IsOn;
    }

    private void OnNewTabToggled(object sender, Microsoft.UI.Xaml.RoutedEventArgs e)
    {
        if (_initializing) return;
        _main.Settings.OpenFoldersInNewTab = NewTabSwitch.IsOn;
        _main.Settings.Save();
    }

    private void OnScopeToggled(object sender, Microsoft.UI.Xaml.RoutedEventArgs e)
    {
        if (_initializing) return;
        _main.SearchInCurrentFolderOnly = ScopeSwitch.IsOn;
    }

    private void OnAsYouTypeToggled(object sender, Microsoft.UI.Xaml.RoutedEventArgs e)
    {
        if (_initializing) return;
        _main.Settings.SearchAsYouType = AsYouTypeSwitch.IsOn;
        _main.Settings.Save();
    }

    private void OnIndexStartupToggled(object sender, Microsoft.UI.Xaml.RoutedEventArgs e)
    {
        if (_initializing) return;
        _main.Settings.IndexOnStartup = IndexStartupSwitch.IsOn;
        _main.Settings.Save();
    }

    private void OnRecycleToggled(object sender, Microsoft.UI.Xaml.RoutedEventArgs e)
    {
        if (_initializing) return;
        _main.DeleteToRecycleBin = RecycleSwitch.IsOn;
    }

    private void OnConflictChanged(object sender, SelectionChangedEventArgs e)
    {
        if (_initializing) return;
        _main.Settings.DefaultConflictPolicy = ConflictBox.SelectedIndex switch
        {
            1 => ConflictPolicySetting.Replace,
            2 => ConflictPolicySetting.Skip,
            3 => ConflictPolicySetting.KeepBoth,
            _ => ConflictPolicySetting.Ask
        };
        _main.Settings.Save();
    }

    private void OnBuildIndexClick(object sender, Microsoft.UI.Xaml.RoutedEventArgs e)
    {
        _main.BuildIndexCommand.Execute(null);
        IndexStatusText.Text = "正在建立索引…（首次读取 MFT 通常几秒内完成，之后靠 USN 增量保持实时）";
    }

    private void OnRestartElevatedClick(object sender, Microsoft.UI.Xaml.RoutedEventArgs e)
        => _main.RestartElevatedCommand.Execute(null);
}