using System;
using System.Collections.Generic;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using InstaSoftOfficeTool.Services;

namespace InstaSoftOfficeTool.Pages
{
    public partial class TroubleshootPage : Page
    {
        private readonly MainWindow _main;
        private readonly LicenseManager _licenseManager = new LicenseManager();
        private List<LicenseEntry> _entries = new List<LicenseEntry>();

        public TroubleshootPage(MainWindow main)
        {
            InitializeComponent();
            _main = main;
            Loaded += async (s, e) => await RefreshStatus();
        }

        private async System.Threading.Tasks.Task RefreshStatus()
        {
            OutputText.Text = "";
            OsppPathText.Text = "";
            KeyCardsPanel.Children.Clear();
            BtnRemoveAll.IsEnabled = false;
            BtnRemoveAll.Visibility = Visibility.Collapsed;
            BtnRefresh.IsEnabled = false;

            var loadingText = new TextBlock
            {
                Text = "Keres\u00e9s folyamatban...",
                FontSize = 13,
                Foreground = (Brush)FindResource("TextSecondaryBrush"),
                Margin = new Thickness(0, 8, 0, 8)
            };
            KeyCardsPanel.Children.Add(loadingText);

            bool found = _licenseManager.FindOspp();

            if (!found)
            {
                KeyCardsPanel.Children.Clear();
                var errorCard = new Border
                {
                    Background = (Brush)FindResource("CardBrush"),
                    BorderBrush = (Brush)FindResource("BorderBrush"),
                    BorderThickness = new Thickness(1),
                    CornerRadius = new CornerRadius(8),
                    Padding = new Thickness(16, 14, 16, 14),
                    Margin = new Thickness(0, 0, 0, 6)
                };
                var errorPanel = new StackPanel();
                errorPanel.Children.Add(new TextBlock
                {
                    Text = "Az ospp.vbs nem tal\u00e1lhat\u00f3",
                    FontSize = 14, FontWeight = FontWeights.SemiBold,
                    Foreground = (Brush)FindResource("ErrorBrush")
                });
                errorPanel.Children.Add(new TextBlock
                {
                    Text = "Nincs telep\u00edtett Microsoft Office, vagy nem a szok\u00e1sos helyre lett telep\u00edtve.",
                    FontSize = 12, Foreground = (Brush)FindResource("TextSecondaryBrush"),
                    TextWrapping = TextWrapping.Wrap, Margin = new Thickness(0, 4, 0, 0)
                });
                errorCard.Child = errorPanel;
                KeyCardsPanel.Children.Add(errorCard);
                BtnRefresh.IsEnabled = true;
                return;
            }

            OsppPathText.Text = "ospp.vbs helye: " + _licenseManager.OsppPath;

            try
            {
                string status = await _licenseManager.GetStatusAsync();
                OutputText.Text = status;

                _entries = _licenseManager.ParseLicenseEntries(status);
                BuildKeyCards();
            }
            catch (Exception ex)
            {
                KeyCardsPanel.Children.Clear();
                OutputText.Text = "Hiba a lek\u00e9rdez\u00e9s sor\u00e1n: " + ex.Message;
            }

            BtnRefresh.IsEnabled = true;
        }

        private void BuildKeyCards()
        {
            KeyCardsPanel.Children.Clear();

            if (_entries.Count == 0)
            {
                var noKeyCard = new Border
                {
                    Background = (Brush)FindResource("CardBrush"),
                    BorderBrush = (Brush)FindResource("BorderBrush"),
                    BorderThickness = new Thickness(1),
                    CornerRadius = new CornerRadius(8),
                    Padding = new Thickness(16, 14, 16, 14)
                };
                noKeyCard.Child = new TextBlock
                {
                    Text = "Nincs telep\u00edtett term\u00e9kkulcs.",
                    FontSize = 13,
                    Foreground = (Brush)FindResource("TextSecondaryBrush")
                };
                KeyCardsPanel.Children.Add(noKeyCard);
                return;
            }

            if (_entries.Count > 1)
            {
                BtnRemoveAll.Visibility = Visibility.Visible;
                BtnRemoveAll.IsEnabled = true;
            }

            foreach (var entry in _entries)
            {
                KeyCardsPanel.Children.Add(CreateKeyCard(entry));
            }
        }

        private Border CreateKeyCard(LicenseEntry entry)
        {
            var grid = new Grid();
            grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
            grid.ColumnDefinitions.Add(new ColumnDefinition { Width = GridLength.Auto });

            var infoPanel = new StackPanel { VerticalAlignment = VerticalAlignment.Center };

            infoPanel.Children.Add(new TextBlock
            {
                Text = string.IsNullOrEmpty(entry.LicenseName) ? "Ismeretlen licenc" : entry.LicenseName,
                FontSize = 13, FontWeight = FontWeights.SemiBold,
                TextTrimming = TextTrimming.CharacterEllipsis
            });

            var statusLine = !string.IsNullOrEmpty(entry.ErrorDescription)
                ? entry.ErrorDescription
                : (!string.IsNullOrEmpty(entry.Status) ? entry.Status : entry.Description);

            infoPanel.Children.Add(new TextBlock
            {
                Text = statusLine,
                FontSize = 11, Foreground = (Brush)FindResource("TextSecondaryBrush"),
                TextTrimming = TextTrimming.CharacterEllipsis
            });

            infoPanel.Children.Add(new TextBlock
            {
                Text = "Kulcs: *****-" + entry.Last5,
                FontSize = 11, FontFamily = new FontFamily("Consolas"),
                Foreground = (Brush)FindResource("TextSecondaryBrush"),
                Margin = new Thickness(0, 2, 0, 0)
            });

            Grid.SetColumn(infoPanel, 0);
            grid.Children.Add(infoPanel);

            // Right side: Activate + Remove buttons
            var btnPanel = new StackPanel
            {
                Orientation = Orientation.Horizontal,
                VerticalAlignment = VerticalAlignment.Center
            };

            var activateBtn = new Button
            {
                Content = "Aktiv\u00e1l\u00e1s",
                Style = (Style)FindResource("PrimaryButton"),
                Padding = new Thickness(14, 6, 14, 6),
                FontSize = 12,
                Tag = entry.Last5
            };
            activateBtn.Click += BtnActivateSingle_Click;
            btnPanel.Children.Add(activateBtn);

            var removeBtn = new Button
            {
                Content = "Elt\u00e1vol\u00edt\u00e1s",
                Style = (Style)FindResource("SecondaryButton"),
                Padding = new Thickness(14, 6, 14, 6),
                FontSize = 12,
                Tag = entry.Last5,
                Margin = new Thickness(6, 0, 0, 0)
            };
            removeBtn.Click += BtnRemoveSingle_Click;
            btnPanel.Children.Add(removeBtn);

            Grid.SetColumn(btnPanel, 1);
            grid.Children.Add(btnPanel);

            return new Border
            {
                Background = (Brush)FindResource("CardBrush"),
                BorderBrush = (Brush)FindResource("BorderBrush"),
                BorderThickness = new Thickness(1),
                CornerRadius = new CornerRadius(8),
                Padding = new Thickness(16, 10, 16, 10),
                Margin = new Thickness(0, 0, 0, 6),
                Child = grid
            };
        }

        private async void BtnActivateSingle_Click(object sender, RoutedEventArgs e)
        {
            string key = await _main.AskProductKeyAsync();
            if (string.IsNullOrEmpty(key)) return;

            var btn = (Button)sender;
            btn.IsEnabled = false;
            btn.Content = "...";

            DetailsExpander.IsExpanded = true;
            OutputText.Text = "Term\u00e9kkulcs telep\u00edt\u00e9se: " + key + "\n";

            try
            {
                string inpResult = await _licenseManager.InstallKeyAsync(key);
                OutputText.Text += inpResult + "\n";

                OutputText.Text += "Aktiv\u00e1l\u00e1s...\n";
                string actResult = await _licenseManager.ActivateAsync();
                OutputText.Text += actResult;

                await RefreshStatus();
            }
            catch (Exception ex)
            {
                OutputText.Text += "\nHiba: " + ex.Message;
                btn.IsEnabled = true;
                btn.Content = "Aktiv\u00e1l\u00e1s";
            }
        }

        private async void BtnRemoveSingle_Click(object sender, RoutedEventArgs e)
        {
            var btn = (Button)sender;
            var last5 = (string)btn.Tag;

            bool confirmed = await _main.ConfirmAsync(
                "Kulcs elt\u00e1vol\u00edt\u00e1sa",
                "Biztosan el szeretn\u00e9 t\u00e1vol\u00edtani a *****-" + last5 + " kulcsot?",
                "Elt\u00e1vol\u00edt\u00e1s", "M\u00e9gse", DialogType.Question);

            if (!confirmed) return;

            btn.IsEnabled = false;
            btn.Content = "...";

            try
            {
                await _licenseManager.RemoveKeyAsync(last5);
                await RefreshStatus();
            }
            catch (Exception ex)
            {
                OutputText.Text += "\nHiba: " + ex.Message;
                btn.IsEnabled = true;
                btn.Content = "Elt\u00e1vol\u00edt\u00e1s";
            }
        }

        private async void BtnRefresh_Click(object sender, RoutedEventArgs e)
        {
            await RefreshStatus();
        }

        private async void BtnRemoveAll_Click(object sender, RoutedEventArgs e)
        {
            bool confirmed = await _main.ConfirmAsync(
                "\u00d6sszes kulcs elt\u00e1vol\u00edt\u00e1sa",
                "Biztosan el szeretn\u00e9 t\u00e1vol\u00edtani az \u00f6sszes telep\u00edtett term\u00e9kkulcsot (" + _entries.Count + " db)?\n\n" +
                "Ez nem t\u00f6r\u00f6l adatot, csak az aktiv\u00e1ci\u00f3s \u00e1llapotot \u00e1ll\u00edtja vissza.",
                "\u00d6sszes elt\u00e1vol\u00edt\u00e1sa", "M\u00e9gse");

            if (!confirmed) return;

            BtnRemoveAll.IsEnabled = false;
            BtnRefresh.IsEnabled = false;

            try
            {
                await _licenseManager.RemoveAllKeysAsync();
                await RefreshStatus();
            }
            catch (Exception ex)
            {
                OutputText.Text += "\nHiba: " + ex.Message;
            }

            BtnRefresh.IsEnabled = true;
        }

        private void DetailsExpander_Expanded(object sender, RoutedEventArgs e)
        {
            _main.Height = 680;
        }

        private void DetailsExpander_Collapsed(object sender, RoutedEventArgs e)
        {
            _main.Height = 550;
        }
    }
}