using System;
using System.Collections.Generic;
using System.IO;
using System.Windows;
using System.Windows.Controls;
using InstaSoftOfficeTool.Models;
using InstaSoftOfficeTool.Services;

namespace InstaSoftOfficeTool.Pages
{
    public partial class PreInstallCheckPage : Page
    {
        private readonly MainWindow _main;
        private List<InstalledOffice> _detected;

        public PreInstallCheckPage(MainWindow main)
        {
            InitializeComponent();
            _main = main;
            Loaded += (s, e) => DetectOffice();
        }

        private void DetectOffice()
        {
            _detected = OfficeDetector.Detect();
            OfficeListPanel.Children.Clear();

            if (_detected.Count == 0)
            {
                SubtitleText.Text = "Nincs kor\u00e1bbi Office telep\u00edt\u00e9s a g\u00e9pen.";
                NoOfficeCard.Visibility = Visibility.Visible;
                BtnRemove.Visibility = Visibility.Collapsed;
                LicenseCleanupPanel.Visibility = Visibility.Collapsed;
                BtnSkip.Content = "Tov\u00e1bb a telep\u00edt\u00e9shez \u2192";
                return;
            }

            SubtitleText.Text = "A sz\u00e1m\u00edt\u00f3g\u00e9pen tal\u00e1lt Office telep\u00edt\u00e9sek. Az \u00faj Office telep\u00edt\u00e9se el\u0151tt aj\u00e1nlott elt\u00e1vol\u00edtani.";
            BtnRemove.Visibility = Visibility.Visible;
            LicenseCleanupPanel.Visibility = Visibility.Visible;

            foreach (var office in _detected)
            {
                var cb = new CheckBox
                {
                    Content = office.DisplayName +
                        (string.IsNullOrEmpty(office.Version) ? "" : "  (" + office.Version + ")"),
                    IsChecked = true,
                    Style = (Style)FindResource("FluentCheckBox"),
                    Tag = office,
                    Margin = new Thickness(0, 4, 0, 4),
                    FontSize = 14
                };
                OfficeListPanel.Children.Add(cb);
            }
        }

        private void BtnSkip_Click(object sender, RoutedEventArgs e)
        {
            _main.ProceedToInstall();
        }

        private async void BtnRemove_Click(object sender, RoutedEventArgs e)
        {
            bool confirmed = await _main.ConfirmAsync(
                "Office elt\u00e1vol\u00edt\u00e1s",
                "Biztosan el szeretn\u00e9 t\u00e1vol\u00edtani a kiv\u00e1lasztott Office telep\u00edt\u00e9seket az \u00faj verzi\u00f3 telep\u00edt\u00e9se el\u0151tt?",
                "Elt\u00e1vol\u00edt\u00e1s", "M\u00e9gse");

            if (!confirmed) return;

            BtnRemove.IsEnabled = false;
            BtnSkip.IsEnabled = false;
            LogPanel.Visibility = Visibility.Visible;

            bool hasC2R = false;
            foreach (UIElement child in OfficeListPanel.Children)
            {
                if (child is CheckBox cb && cb.IsChecked == true)
                {
                    var office = (InstalledOffice)cb.Tag;
                    if (office.IsClickToRun)
                    {
                        hasC2R = true;
                    }
                    else if (!string.IsNullOrEmpty(office.ProductCode))
                    {
                        AppendLog("MSI elt\u00e1vol\u00edt\u00e1s: " + office.DisplayName);
                        var runner = new ProcessRunner();
                        runner.OutputReceived += msg => Dispatcher.Invoke(() => AppendLog(msg));
                        await runner.RunAsync("msiexec", "/x " + office.ProductCode + " /qb");
                    }
                }
            }

            if (hasC2R)
            {
                AppendLog("Click-to-Run Office elt\u00e1vol\u00edt\u00e1sa...");
                var downloader = new OdtDownloader();
                downloader.StatusChanged += msg => Dispatcher.Invoke(() => AppendLog(msg));

                bool ok = await downloader.DownloadAndExtractAsync();
                if (ok)
                {
                    string removeXml = OdtXmlGenerator.GenerateRemoveAll();
                    string xmlPath = Path.Combine(downloader.OdtFolder, "remove.xml");
                    File.WriteAllText(xmlPath, removeXml);

                    int exitCode = await downloader.RunRemoveAsync(xmlPath,
                        msg => Dispatcher.Invoke(() => AppendLog(msg)));

                    AppendLog(exitCode == 0
                        ? "Office sikeresen elt\u00e1vol\u00edtva."
                        : "Elt\u00e1vol\u00edt\u00e1s befejez\u0151d\u00f6tt (k\u00f3d: " + exitCode + ")");
                }
            }

            if (CbCleanLicense.IsChecked == true)
            {
                AppendLog("Licenc-adatb\u00e1zis tiszt\u00edt\u00e1sa...");
                var lm = new LicenseManager();
                if (lm.FindOspp())
                {
                    var cleanResult = await lm.RemoveAllKeysAsync();
                    AppendLog(cleanResult);
                }
                else
                {
                    AppendLog("Az ospp.vbs nem tal\u00e1lhat\u00f3 \u2014 licenc-tiszt\u00edt\u00e1s kihagyva.");
                }
            }

            AppendLog("K\u00e9sz. Tov\u00e1bbl\u00e9p\u00e9s az \u00faj Office telep\u00edt\u00e9s\u00e9hez...");

            // Auto-proceed to install after short delay
            await System.Threading.Tasks.Task.Delay(1500);
            _main.ProceedToInstall();
        }

        private void AppendLog(string text)
        {
            LogText.Text += DateTime.Now.ToString("HH:mm:ss") + "  " + text + "\n";
            LogText.ScrollToEnd();
        }
    }
}