using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Interop;
using Microsoft.Win32;
using VideoDownloader.Core.Config;
using VideoDownloader.Core.Social;

namespace VideoDownloader.App;

public partial class SettingsWindow : Window
{
    public AppConfig Config { get; }
    private readonly string _origTheme;
    private readonly Func<Task>? _clearBrowsingData;
    public bool ThemeChanged { get; private set; }

    public SettingsWindow(AppConfig config, Func<Task>? clearBrowsingData = null)
    {
        InitializeComponent();
        Config = config;
        _origTheme = config.Theme;
        _clearBrowsingData = clearBrowsingData;

        FolderBox.Text = config.OutputFolder;
        HomeBox.Text = config.HomeUrl;
        ConcurrencyBox.Text = config.Concurrency.ToString();
        MinSizeBox.Text = config.MinSizeMB.ToString();
        MaxConcurrentBox.Text = config.MaxConcurrentDownloads.ToString();
        ThemeLightBox.IsChecked = config.Theme.Equals("light", StringComparison.OrdinalIgnoreCase);
        FfmpegBox.Text = config.FfmpegPath ?? "";

        FmtHls.IsChecked = config.EnabledFormats.Contains("hls");
        FmtDash.IsChecked = config.EnabledFormats.Contains("dash");
        FmtMp4.IsChecked = config.EnabledFormats.Contains("mp4");
        FmtWebM.IsChecked = config.EnabledFormats.Contains("webm");
        FmtMkv.IsChecked = config.EnabledFormats.Contains("mkv");
        FmtM4v.IsChecked = config.EnabledFormats.Contains("m4v");
        FmtMov.IsChecked = config.EnabledFormats.Contains("mov");
        FmtAvi.IsChecked = config.EnabledFormats.Contains("avi");
        FmtAudio.IsChecked = config.EnabledFormats.Contains("audio");

        YtDlpBox.Text = config.YtDlpPath ?? "";
        UseCookiesBox.IsChecked = config.UseCookiesForSocial;
        AutoInstallBox.IsChecked = config.AutoInstallYtDlp;
        AutoUpdateBox.IsChecked = config.AutoUpdateYtDlp;
        AutoInstallDenoBox.IsChecked = config.AutoInstallDeno;
        DefaultQualityBox.SelectedValue = config.DefaultSocialQuality;
        if (DefaultQualityBox.SelectedIndex < 0) DefaultQualityBox.SelectedIndex = 0;
        YoutubeClientsBox.Text = config.YoutubePlayerClients ?? "";

        ProfilePathBox.Text = MainWindow.ProfileFolder;
        ProfileModeText.Text = config.PrivateMode
            ? "개인정보 보호 모드(InPrivate) — 데이터를 저장하지 않습니다"
            : "일반 모드 — 쿠키·세션·localStorage 를 프로필에 보존합니다";
    }

    private void BrowseFolder(object sender, RoutedEventArgs e)
    {
        var dlg = new OpenFolderDialog();
        if (Directory.Exists(FolderBox.Text)) dlg.InitialDirectory = FolderBox.Text;
        if (dlg.ShowDialog() == true)
            FolderBox.Text = dlg.FolderName;
    }

    private void BrowseFfmpeg(object sender, RoutedEventArgs e)
    {
        var dlg = new OpenFileDialog { Filter = "ffmpeg|ffmpeg.exe|실행 파일|*.exe|모든 파일|*.*" };
        if (dlg.ShowDialog() == true)
            FfmpegBox.Text = dlg.FileName;
    }

    private void BrowseYtDlp(object sender, RoutedEventArgs e)
    {
        var dlg = new OpenFileDialog { Filter = "yt-dlp|yt-dlp.exe|실행 파일|*.exe|모든 파일|*.*" };
        if (dlg.ShowDialog() == true)
            YtDlpBox.Text = dlg.FileName;
    }

    private async void ReinstallYtDlp_Click(object sender, RoutedEventArgs e)
    {
        var btn = sender as Button;
        if (btn != null) btn.IsEnabled = false;
        try
        {
            var path = await YtDlpRunner.DownloadAsync(Config, null, CancellationToken.None);
            MessageBox.Show(path != null ? $"yt-dlp 설치 완료:\n{path}" : "yt-dlp 다운로드에 실패했습니다. 네트워크를 확인하세요.",
                "yt-dlp", MessageBoxButton.OK, path != null ? MessageBoxImage.Information : MessageBoxImage.Warning);
            if (path != null) YtDlpBox.Text = "";
        }
        finally { if (btn != null) btn.IsEnabled = true; }
    }

    private async void ClearData_Click(object sender, RoutedEventArgs e)
    {
        if (_clearBrowsingData == null) return;
        if (MessageBox.Show("쿠키·localStorage·캐시 등 브라우저 데이터를 삭제합니다.\n로그인이 풀릴 수 있습니다. 계속할까요?",
                "데이터 삭제", MessageBoxButton.OKCancel, MessageBoxImage.Warning) != MessageBoxResult.OK) return;
        var btn = sender as Button;
        if (btn != null) btn.IsEnabled = false;
        try { await _clearBrowsingData(); }
        finally { if (btn != null) btn.IsEnabled = true; }
    }

    private void Ok_Click(object sender, RoutedEventArgs e)
    {
        Config.OutputFolder = FolderBox.Text?.Trim() ?? "";
        Config.HomeUrl = string.IsNullOrWhiteSpace(HomeBox.Text) ? "https://www.google.com" : HomeBox.Text.Trim();
        if (int.TryParse(ConcurrencyBox.Text, out var c)) Config.Concurrency = Math.Max(1, c);
        if (long.TryParse(MinSizeBox.Text, out var m) && m >= 0) Config.MinSizeMB = m;
        Config.FfmpegPath = string.IsNullOrWhiteSpace(FfmpegBox.Text) ? null : FfmpegBox.Text.Trim();

        Config.Theme = ThemeLightBox.IsChecked == true ? "light" : "dark";
        if (int.TryParse(MaxConcurrentBox.Text, out var mc)) Config.MaxConcurrentDownloads = Math.Max(1, mc);
        ThemeChanged = !Config.Theme.Equals(_origTheme, StringComparison.OrdinalIgnoreCase);

        var fmts = new List<string>();
        if (FmtHls.IsChecked == true) fmts.Add("hls");
        if (FmtDash.IsChecked == true) fmts.Add("dash");
        if (FmtMp4.IsChecked == true) fmts.Add("mp4");
        if (FmtWebM.IsChecked == true) fmts.Add("webm");
        if (FmtMkv.IsChecked == true) fmts.Add("mkv");
        if (FmtM4v.IsChecked == true) fmts.Add("m4v");
        if (FmtMov.IsChecked == true) fmts.Add("mov");
        if (FmtAvi.IsChecked == true) fmts.Add("avi");
        if (FmtAudio.IsChecked == true) fmts.Add("audio");
        Config.EnabledFormats = fmts;

        Config.YtDlpPath = string.IsNullOrWhiteSpace(YtDlpBox.Text) ? null : YtDlpBox.Text.Trim();
        Config.UseCookiesForSocial = UseCookiesBox.IsChecked == true;
        Config.AutoInstallYtDlp = AutoInstallBox.IsChecked == true;
        Config.AutoUpdateYtDlp = AutoUpdateBox.IsChecked == true;
        Config.AutoInstallDeno = AutoInstallDenoBox.IsChecked == true;
        Config.DefaultSocialQuality = (DefaultQualityBox.SelectedValue as string) ?? "best";
        Config.YoutubePlayerClients = string.IsNullOrWhiteSpace(YoutubeClientsBox.Text) ? null : YoutubeClientsBox.Text.Trim();

        DialogResult = true;
    }

    // 보더리스: Win11 어두운 테두리 + 둥근 모서리
    protected override void OnSourceInitialized(EventArgs e)
    {
        base.OnSourceInitialized(e);
        try
        {
            var hwnd = new WindowInteropHelper(this).Handle;
            int dark = App.IsLightTheme ? 0 : 1; // DWMWA_USE_IMMERSIVE_DARK_MODE (라이트 테마면 밝게)
            DwmSetWindowAttribute(hwnd, 20, ref dark, sizeof(int));
            int round = 2; // DWMWCP_ROUND
            DwmSetWindowAttribute(hwnd, 33, ref round, sizeof(int));
        }
        catch { }
    }

    private void TitleBar_MouseDown(object sender, MouseButtonEventArgs e)
    {
        if (e.LeftButton == MouseButtonState.Pressed) { try { DragMove(); } catch { } }
    }

    private void Close_Click(object sender, RoutedEventArgs e) => Close();

    [DllImport("dwmapi.dll")]
    private static extern int DwmSetWindowAttribute(IntPtr hwnd, int attribute, ref int pvAttribute, int cbAttribute);
}