using System.Collections.Generic;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Shapes;
using InstaSoftOfficeTool.Models;
using InstaSoftOfficeTool.Pages;

namespace InstaSoftOfficeTool
{
    public partial class MainWindow : Window
    {
        private InstallConfig _config = new InstallConfig();
        private List<Page> _wizardPages;
        private int _currentPageIndex = -1;
        private string _currentFlow; // "install", "remove", "license"

        public MainWindow()
        {
            InitializeComponent();
            NavigateToWelcome();
        }

        public void NavigateToWelcome()
        {
            _currentFlow = null;
            _currentPageIndex = -1;
            _config = new InstallConfig();
            BtnBack.Visibility = Visibility.Collapsed;
            BtnNext.Visibility = Visibility.Collapsed;
            StepIndicator.Children.Clear();
            ContentFrame.Navigate(new WelcomePage(this));
        }

        public void StartInstallFlow()
        {
            _currentFlow = "install";
            _config = new InstallConfig();
            _wizardPages = new List<Page>
            {
                new VersionPage(this, _config),       // 0
                new EditionPage(this, _config),       // 1
                new ConfigPage(this, _config),        // 2
                new ProductKeyPage(this, _config),    // 3
                new SummaryPage(this, _config),        // 4
                new PreInstallCheckPage(this),         // 5 — remove old Office
                new ProgressPage(this, _config)        // 6
            };
            _currentPageIndex = 0;
            ShowCurrentPage();
        }

        public void StartRemoveFlow()
        {
            _currentFlow = "remove";
            _wizardPages = new List<Page>
            {
                new RemovePage(this)
            };
            _currentPageIndex = 0;
            BtnNext.Visibility = Visibility.Collapsed;
            BtnBack.Visibility = Visibility.Visible;
            StepIndicator.Children.Clear();
            ContentFrame.Navigate(_wizardPages[0]);
        }

        public void StartLicenseFlow()
        {
            _currentFlow = "license";
            _wizardPages = new List<Page>
            {
                new TroubleshootPage(this)
            };
            _currentPageIndex = 0;
            BtnNext.Visibility = Visibility.Collapsed;
            BtnBack.Visibility = Visibility.Visible;
            StepIndicator.Children.Clear();
            ContentFrame.Navigate(_wizardPages[0]);
        }

        private void ShowCurrentPage()
        {
            if (_currentPageIndex < 0 || _currentPageIndex >= _wizardPages.Count) return;

            ContentFrame.Navigate(_wizardPages[_currentPageIndex]);
            UpdateStepIndicator();
            UpdateButtons();
        }

        private void UpdateStepIndicator()
        {
            StepIndicator.Children.Clear();
            if (_currentFlow != "install") return;

            // Only show dots for install flow (exclude PreInstallCheck + Progress)
            int totalDots = _wizardPages.Count - 2;
            for (int i = 0; i < totalDots; i++)
            {
                var dot = new Ellipse
                {
                    Margin = new Thickness(4, 0, 4, 0)
                };

                if (i <= _currentPageIndex)
                {
                    dot.Width = 10;
                    dot.Height = 10;
                    dot.Fill = (SolidColorBrush)FindResource("AccentBrush");
                }
                else
                {
                    dot.Width = 8;
                    dot.Height = 8;
                    dot.Fill = (SolidColorBrush)FindResource("BorderBrush");
                }

                StepIndicator.Children.Add(dot);
            }
        }

        private void UpdateButtons()
        {
            BtnBack.Visibility = _currentPageIndex > 0 ? Visibility.Visible : Visibility.Collapsed;
            BtnNext.Visibility = Visibility.Visible;

            // On SummaryPage = "Tov\u00e1bb"
            // On PreInstallCheckPage or ProgressPage = hide
            if (_wizardPages[_currentPageIndex] is PreInstallCheckPage ||
                _wizardPages[_currentPageIndex] is ProgressPage)
            {
                BtnNext.Visibility = Visibility.Collapsed;
                BtnBack.Visibility = Visibility.Collapsed;
                StepIndicator.Children.Clear();
            }
            else
            {
                BtnNext.Content = "Tov\u00e1bb \u2192";
            }
        }

        private void BtnBack_Click(object sender, RoutedEventArgs e)
        {
            // Reset window height in case a page enlarged it
            Height = 550;

            if (_currentPageIndex > 0 && _currentFlow == "install")
            {
                _currentPageIndex--;
                ShowCurrentPage();
            }
            else
            {
                NavigateToWelcome();
            }
        }

        private void BtnNext_Click(object sender, RoutedEventArgs e)
        {
            if (_currentFlow != "install") return;

            // Validate current page
            var currentPage = _wizardPages[_currentPageIndex];
            if (currentPage is IWizardPage wizardPage && !wizardPage.Validate())
                return;

            if (_currentPageIndex < _wizardPages.Count - 1)
            {
                _currentPageIndex++;

                // Refresh edition page when version changes
                if (_currentPageIndex == 1)
                {
                    _wizardPages[1] = new EditionPage(this, _config);
                }

                // Refresh config page when edition changes (MSI/ODT mode may differ)
                if (_currentPageIndex == 2)
                {
                    _wizardPages[2] = new ConfigPage(this, _config);
                }

                ShowCurrentPage();
            }
        }

        public void ProceedToInstall()
        {
            // Jump to ProgressPage (last page in the wizard)
            _currentPageIndex = _wizardPages.Count - 1;
            ShowCurrentPage();

            if (_wizardPages[_currentPageIndex] is ProgressPage progressPage)
            {
                progressPage.StartInstallation();
            }
        }

        public void ShowCloseButton()
        {
            BtnNext.Content = "Bez\u00e1r\u00e1s";
            BtnNext.Visibility = Visibility.Visible;
            BtnNext.Click -= BtnNext_Click;
            BtnNext.Click += (s, e) => Close();
        }

        public Task<bool> ConfirmAsync(string title, string message,
            string confirmText = "Igen", string cancelText = "M\u00e9gse",
            DialogType type = DialogType.Warning)
        {
            return Dialog.ShowAsync(title, message, confirmText, cancelText, type);
        }

        public Task<string> AskProductKeyAsync()
        {
            return KeyDialog.ShowAsync();
        }

        public void ShowBackToHomeButton()
        {
            BtnBack.Content = "\u2190 F\u0151oldal";
            BtnBack.Visibility = Visibility.Visible;
        }
    }

    public interface IWizardPage
    {
        bool Validate();
    }
}