using System.Windows;
using Explorer.Application;
using Explorer.Hosting;
using Explorer.Presentation.ViewModels;

namespace Explorer.App;

public partial class SettingsWindow : Window
{
    private readonly MainViewModel _vm;
    private readonly string _originalTheme;

    public SettingsWindow(MainViewModel vm)
    {
        InitializeComponent();
        _vm = vm;
        var prefs = vm.CurrentPreferences();
        _originalTheme = prefs.Theme;
        ThemeDark.IsChecked = prefs.Theme != "Light";
        ThemeLight.IsChecked = prefs.Theme == "Light";
        GroupNetwork.IsChecked = prefs.GroupNetworkPlaces;
        GroupCloud.IsChecked = prefs.GroupCloudPlaces;
        IndexArchives.IsChecked = prefs.IndexArchiveContents;
        AutoIndexRemovable.IsChecked = prefs.AutoIndexRemovable;
        BackgroundHostAtLogon.IsChecked = prefs.BackgroundHostAtLogon;
        ShowHidden.IsChecked = prefs.ShowHiddenFiles;
        ShowProtected.IsChecked = prefs.ShowProtectedSystemLocations;
        AutoClearQueue.IsChecked = prefs.AutoClearQueueWhenDone;
        SevenZipPath.Text = prefs.SevenZipPath ?? "";
        GitPath.Text = prefs.GitPath ?? "";
        FfmpegPath.Text = prefs.FfmpegPath ?? "";
    }

    private void OnThemeChanged(object sender, RoutedEventArgs e)
    {
        if (!IsLoaded)
        {
            return;
        }

        _vm.Theme = ThemeLight.IsChecked == true ? "Light" : "Dark";
    }

    private async void OnOk(object sender, RoutedEventArgs e)
    {
        var prefs = _vm.CurrentPreferences() with
        {
            Theme = ThemeLight.IsChecked == true ? "Light" : "Dark",
            GroupNetworkPlaces = GroupNetwork.IsChecked == true,
            GroupCloudPlaces = GroupCloud.IsChecked == true,
            IndexArchiveContents = IndexArchives.IsChecked == true,
            AutoIndexRemovable = AutoIndexRemovable.IsChecked == true,
            BackgroundHostAtLogon = BackgroundHostAtLogon.IsChecked == true,
            ShowHiddenFiles = ShowHidden.IsChecked == true,
            ShowProtectedSystemLocations = ShowProtected.IsChecked == true,
            AutoClearQueueWhenDone = AutoClearQueue.IsChecked == true,
            SevenZipPath = string.IsNullOrWhiteSpace(SevenZipPath.Text) ? null : SevenZipPath.Text.Trim(),
            GitPath = string.IsNullOrWhiteSpace(GitPath.Text) ? null : GitPath.Text.Trim(),
            FfmpegPath = string.IsNullOrWhiteSpace(FfmpegPath.Text) ? null : FfmpegPath.Text.Trim()
        };
        await _vm.ApplyPreferencesAsync(prefs).ConfigureAwait(true);
        ApplyBackgroundHostAutostart(prefs.BackgroundHostAtLogon);
        DialogResult = true;
        Close();
    }

    private void ApplyBackgroundHostAutostart(bool enabled)
    {
        if (enabled)
        {
            var exe = HostLogonAutostart.FindHostExecutable();
            if (exe is null)
            {
                MessageBox.Show(
                    this,
                    "Explorer.Host.exe was not found next to Explorer Workbench, so the sign-in task was not registered.",
                    "Background host",
                    MessageBoxButton.OK,
                    MessageBoxImage.Warning);
                return;
            }

            if (!HostLogonAutostart.TryRegister(exe, out var error))
            {
                MessageBox.Show(this, error, "Background host", MessageBoxButton.OK, MessageBoxImage.Warning);
            }

            return;
        }

        if (!HostLogonAutostart.TryUnregister(out var unregisterError))
        {
            MessageBox.Show(this, unregisterError, "Background host", MessageBoxButton.OK, MessageBoxImage.Warning);
        }
    }

    private void OnBrowseSevenZip(object sender, RoutedEventArgs e)
    {
        var dlg = new Microsoft.Win32.OpenFileDialog
        {
            Title = "7-Zip executable",
            Filter = "7-Zip|7z.exe;7za.exe|Executables|*.exe|All files|*.*",
            FileName = SevenZipPath.Text
        };
        if (dlg.ShowDialog(this) == true)
        {
            SevenZipPath.Text = dlg.FileName;
        }
    }

    private void OnBrowseGit(object sender, RoutedEventArgs e)
    {
        var dlg = new Microsoft.Win32.OpenFileDialog
        {
            Title = "Git executable",
            Filter = "Git|git.exe|Executables|*.exe|All files|*.*",
            FileName = GitPath.Text
        };
        if (dlg.ShowDialog(this) == true)
        {
            GitPath.Text = dlg.FileName;
        }
    }

    private void OnBrowseFfmpeg(object sender, RoutedEventArgs e)
    {
        var dlg = new Microsoft.Win32.OpenFileDialog
        {
            Title = "FFmpeg executable",
            Filter = "FFmpeg|ffmpeg.exe|Executables|*.exe|All files|*.*",
            FileName = FfmpegPath.Text
        };
        if (dlg.ShowDialog(this) == true)
        {
            FfmpegPath.Text = dlg.FileName;
        }
    }

    private void OnCancel(object sender, RoutedEventArgs e)
    {
        _vm.Theme = _originalTheme;
    }
}