using System.Windows;
using System.Windows.Media;
using EngineeringSync.Setup.Services;
using EngineeringSync.Setup.ViewModels;

namespace EngineeringSync.Setup.Views.Pages;

public partial class InstallingPage : WizardPageBase
{
    private readonly InstallerService _installer;
    private bool _started;

    public InstallingPage(WizardViewModel wizard, InstallerService installer) : base(wizard)
    {
        _installer = installer;
        InitializeComponent();
    }

    private async void Page_Loaded(object sender, RoutedEventArgs e)
    {
        // Nur einmal starten (Page kann bei Navigation neu erzeugt werden)
        if (_started) return;
        _started = true;

        _installer.Progress += OnProgress;
        _installer.LogMessage += OnLogMessage;

        try
        {
            // Button während Installation deaktivieren
            Wizard.SetInstallingState(true);

            await _installer.InstallAsync();
            ShowSuccess();
            
            // Buttons wieder aktivieren vor Navigation
            Wizard.SetInstallingState(false);
            Wizard.NavigateTo(7); // → CompletionPage
        }
        catch (Exception ex)
        {
            ShowError(ex.Message);
            // Buttons wieder aktivieren im Fehlerfall
            Wizard.SetInstallingState(false);
        }
        finally
        {
            _installer.Progress -= OnProgress;
            _installer.LogMessage -= OnLogMessage;
        }
    }

    private void OnProgress(int percent, string step)
    {
        Dispatcher.Invoke(() =>
        {
            ProgressBar.Value = percent;
            ProgressText.Text = $"{percent}%";
            StepText.Text = step;
        });
    }

    private void OnLogMessage(string message)
    {
        Dispatcher.Invoke(() =>
        {
            var ts = DateTime.Now.ToString("HH:mm:ss");
            LogText.Text += $"[{ts}] {message}\n";
            LogScrollViewer.ScrollToEnd();
        });
    }

    private void ShowSuccess()
    {
        Dispatcher.Invoke(() =>
        {
            ResultBanner.Background = new SolidColorBrush(Color.FromRgb(232, 245, 233));
            ResultIcon.Text = "\uE73E";
            ResultIcon.Foreground = new SolidColorBrush(Color.FromRgb(16, 124, 16));
            ResultText.Text = "Installation erfolgreich abgeschlossen.";
            ResultText.Foreground = new SolidColorBrush(Color.FromRgb(16, 124, 16));
            ResultBanner.Visibility = Visibility.Visible;
            SubtitleText.Text = "Alle Komponenten wurden erfolgreich installiert.";
            ProgressBar.Value = 100;
            ProgressText.Text = "100%";
        });
    }

    private void ShowError(string message)
    {
        Dispatcher.Invoke(() =>
        {
            ResultBanner.Background = new SolidColorBrush(Color.FromRgb(255, 235, 238));
            ResultIcon.Text = "\uE783";
            ResultIcon.Foreground = new SolidColorBrush(Color.FromRgb(196, 43, 28));
            ResultText.Text = $"Fehler: {message}";
            ResultText.Foreground = new SolidColorBrush(Color.FromRgb(196, 43, 28));
            ResultBanner.Visibility = Visibility.Visible;
            SubtitleText.Text = "Die Installation konnte nicht abgeschlossen werden.";
        });
    }
}