using Blueberry;
using Blueberry.Redmine;
using Blueberry.Redmine.Dto;
using Microsoft.Extensions.Logging;
using System.Collections.ObjectModel;
using System.Diagnostics;
using System.Text.RegularExpressions;
using System.Windows;
using System.Windows.Input;
using Wpf.Ui.Controls;

namespace BlueMine
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : FluentWindow
    {
        private readonly RedmineManager _manager;
        private readonly RedmineSettingsManager _settings;
        private readonly RedmineConfig _config;
        private List<IssueList.Issue> _issues = [];
        private readonly ILoggerFactory _loggerFactory;
        public ObservableCollection<IssueList.Issue> IssuesList { get; set; } = [];
        public ObservableCollection<StatusList.IssueStatus> StatusList { get; set; } = [];

        public MainWindow(RedmineManager manager, RedmineSettingsManager settings, RedmineConfig config, ILoggerFactory loggerFactory)
        {
            _settings = settings;
            _config = config;
            _manager = manager;
            InitializeComponent();
            DataContext = this;
            _loggerFactory = loggerFactory;
        }

        private async void WindowLoaded(object sender, RoutedEventArgs e)
        {
            apiUrlTextBox.Text = _config.RedmineUrl;
            apiPasswordBox.PlaceholderText = new string('●', _config.ApiKey.Length);
            mainCalendar.SelectedDate = DateTime.Today;
            versionTextBlock.Text = UpdateManager.CurrentVersion;

            if(await TestConnection())
            {
                Task loadIssuesTask = LoadIssues();
                Task getHoursTask = GetHours();

                await Task.WhenAll(loadIssuesTask, getHoursTask);
#if !DEBUG
                if(await UpdateManager.IsUpdateAvailable())
                {
                    updateButton.Visibility = Visibility.Visible;
                    UpdateManager.DownloadCompleted += UpdateManager_DownloadCompleted;
                    await UpdateManager.DownloadUpdateAsync();
                }
#endif
            }
        }

        private async void UpdateManager_DownloadCompleted()
        {
            await Dispatcher.Invoke(async () =>
            {
                var result = await new Wpf.Ui.Controls.MessageBox
                {
                    Title = "Frissítés elérhető",
                    Content = "Szeretnél most frissíteni?",
                    PrimaryButtonText = "Frissítés",
                    SecondaryButtonText = "Később",
                    IsCloseButtonEnabled = false,
                }.ShowDialogAsync();

                if (result == Wpf.Ui.Controls.MessageBoxResult.Primary)
                    await UpdateManager.PerformUpdate(true);
            });
        }

        private void CalendarButtonClicked(object sender, RoutedEventArgs e)
        {
            flyoutCalendar.IsOpen = true;
        }

        private IProgress<(int, int)> UpdateProgress(string message)
        {
            var progress = new Progress<(int current, int total)>();
            progress.ProgressChanged += (s, args) =>
            {
                progressRing.Visibility = Visibility.Visible;
                int current = args.current;
                int total = args.total;
                statusTextBlock.Text = $"{message}: {current} / {total}";
                progressBar.Value = (double)current / total * 100;
            };
            return progress;
        }

        private void ApiButtonClicked(object sender, RoutedEventArgs e)
        {
            apiFlyout.IsOpen = true;
        }

        private void CalendarSelectedDatesChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
        {
            if(mainCalendar.SelectedDates.Count == 1)
                calendarButton.Content = mainCalendar.SelectedDate?.ToString("yyyy-MM-dd");
            else if(mainCalendar.SelectedDates.Count > 1)
                calendarButton.Content = $"{mainCalendar.SelectedDates.Count} nap kiválasztva";
            else
                calendarButton.Content = "Válassz egy napot";
        }

        private void apiLinkButton_Click(object sender, RoutedEventArgs e)
        {
            string url = $"{apiUrlTextBox.Text}/my/account";

            var psi = new ProcessStartInfo
            {
                FileName = url,
                UseShellExecute = true
            };
            Process.Start(psi);
        }

        private async void apiSaveButton_Click(object sender, RoutedEventArgs e)
        {
            _config.RedmineUrl = apiUrlTextBox.Text;
            _config.ApiKey = apiPasswordBox.Password;
            apiFlyout.IsOpen = false;
            if(await TestConnection())
            {
                _settings.Save(_config);
                statusTextBlock.Text = "Beállítások mentve és kapcsolódva";
                await LoadIssues();
                await GetHours();
            }
            else
            {
                _settings.Save(_config);
                statusTextBlock.Text = "Beállítások mentve, de a Redmine nem elérhető";
            }
        }

        private void SearchTextBoxTextChanged(object sender, System.Windows.Controls.TextChangedEventArgs e)
        {
            FilterIssues();
        }

        private async void RefreshButtonClick(object sender, RoutedEventArgs e)
        {
            Task loadIssuesTask = LoadIssues();
            Task getHoursTask = GetHours();

            await Task.WhenAll(loadIssuesTask, getHoursTask);
        }

        private void BrowserButtonClick(object sender, RoutedEventArgs e)
        {
            var issueNum = IssueNumberTextBox.Text;
            if (int.TryParse(issueNum, out var issueId))
            {
                string url = $"{_config.RedmineUrl}/issues/{issueId}";

                var psi = new ProcessStartInfo
                {
                    FileName = url,
                    UseShellExecute = true
                };
                Process.Start(psi);
            }
        }

        private async void CloseButtonClick(object sender, RoutedEventArgs e)
        {
            StatusList.Clear();
            var s = await _manager.GetStatusesAsync();
            foreach (var status in s)
                StatusList.Add(status);

            statusFlyout.IsOpen = true;
        }

        private async void FixButtonClick(object sender, RoutedEventArgs e)
        {
            var progress = UpdateProgress("Idők javítása:");
            progressRing.Visibility = Visibility.Visible;

            var i = 0;
            foreach (var date in mainCalendar.SelectedDates)
            {
                var hours = 8 - await _manager.GetCurrentUserTimeAsync(date, date);
                if (hours <= 0)
                    continue;
                var message = Constants.GenericMessages[Random.Shared.Next(Constants.GenericMessages.Length)];
                var id = 801;
                await _manager.LogTimeAsync(id, hours, message, date);
                progress.Report((i, mainCalendar.SelectedDates.Count));
                i++;
            }
            progressBar.Value = 0;
            progressRing.Visibility = Visibility.Hidden;
            await GetHours();
            statusTextBlock.Text = "Idők javítva";

        }

        private async void sendButton_Click(object sender, RoutedEventArgs e)
        {
            if(mainCalendar.SelectedDates.Count == 0)
            {
                await new Wpf.Ui.Controls.MessageBox
                {
                    Title = "Nap hiba",
                    Content = "Nincs kijelölve nap."
                }.ShowDialogAsync();
                return;
            }

            if(int.TryParse(IssueNumberTextBox.Text, out var issueId)
                && double.TryParse(HoursTextBox.Text, out var hours))
            {
                if (hours * 4 != Math.Floor(hours * 4))
                {
                    await new Wpf.Ui.Controls.MessageBox
                    {
                        Title = "Idő formátum hiba",
                        Content = "Az idő csak negyedórákra bontható le."
                    }.ShowDialogAsync();
                    return;
                }
                var total = mainCalendar.SelectedDates.Count;
                var progress = UpdateProgress("Idők beküldése:");
                progressRing.Visibility = Visibility.Visible;
                for (int i = 0; i < total; i++)
                {
                    await _manager.LogTimeAsync(issueId, hours, MessageTextBox.Text, mainCalendar.SelectedDates[i]);
                    progress.Report((i + 1, total));
                }
                await GetHours();
                progressBar.Value = 0;
                progressRing.Visibility = Visibility.Hidden;
                statusTextBlock.Text = "Idők beküldve";
            } else
            {
                await new Wpf.Ui.Controls.MessageBox
                {
                    Title = "Szám formátum hiba",
                    Content = "Az idő/jegyszám nem rendes szám."
                }.ShowDialogAsync();
                return;
            }
        }

        private void ListView_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
        {
            var lv = sender as ListView;
            if(lv != null && lv.SelectedItem is IssueList.Issue item)
            {
                IssueNumberTextBox.Text = item.Id.ToString();
            }
        }

        private async void statusSaveButton_Click(object sender, RoutedEventArgs e)
        {
            var issueNum = IssueNumberTextBox.Text;
            if (int.TryParse(issueNum, out var issueId))
            {
                try
                {
                    var status = statusComboBox.SelectedItem as StatusList.IssueStatus;

                    if (status == null)
                    {
                        await new Wpf.Ui.Controls.MessageBox
                        {
                            Title = "Érvénytelen státusz",
                            Content = "Státusz kiválasztása sikertelen."
                        }.ShowDialogAsync();
                        return;
                    }

                    await _manager.SetIssueStatusAsync(issueId, status.Id);

                    var oldIssue = IssuesList.First(x=>x.Id == issueId);
                    var newIssue = await _manager.GetSimpleIssueAsync(issueId);
                    var index = IssuesList.IndexOf(oldIssue);
                    IssuesList.Insert(index, newIssue);
                    IssuesList.Remove(oldIssue);

                    await new Wpf.Ui.Controls.MessageBox
                    {
                        Title = "Sikeres művelet",
                        Content = $"A(z) {issueId} számú jegy új státusza: {status.Name}.",
                    }.ShowDialogAsync();
                }
                catch (Exception)
                {
                    await new Wpf.Ui.Controls.MessageBox
                    {
                        Title = "Hiba",
                        Content = $"A(z) {issueId} számú jegy módosítása sikertelen.",
                    }.ShowDialogAsync();
                }
            }
            else
            {
                await new Wpf.Ui.Controls.MessageBox
                {
                    Title = "Hiba",
                    Content = "Érvénytelen jegyszám.",
                }.ShowDialogAsync();
            }
        }

        private async void searchTextBox_KeyUp(object sender, KeyEventArgs e)
        {
            if(e.Key == Key.Enter && searchTextBox.Text.Length > 0)
            {
                if (int.TryParse(searchTextBox.Text, out var issueId))
                {
                    try
                    {
                        statusTextBlock.Text = "Jegy keresése...";
                        progressRing.Visibility = Visibility.Visible;
                        var issue = await _manager.GetSimpleIssueAsync(issueId);
                        IssuesList.Clear();
                        IssuesList.Add(issue);
                        statusTextBlock.Text = "Jegy betöltve";
                        progressRing.Visibility = Visibility.Hidden;
                    } catch (Exception) {
                        statusTextBlock.Text = "Jegy nem található";
                        progressRing.Visibility = Visibility.Hidden;
                    }
                }
            }
        }

        private async void openTicketButton_Click(object sender, RoutedEventArgs e)
        {
            if (sender is FrameworkElement button && button.DataContext is IssueList.Issue item)
            {
                // 2. Access the property directly from your model
                var issueId = item.Id;

                try
                {
                    statusTextBlock.Text = "Jegy betöltése...";
                    progressRing.Visibility = Visibility.Visible;
                    var issue = await _manager.GetIssueAsync(issueId);
                    statusTextBlock.Text = "Jegy betöltve";
                    progressRing.Visibility = Visibility.Hidden;
                    var issueWindow = new IssueWindow(issue, _manager, _config);
                    issueWindow.Show();
                } catch (Exception)
                {

                    statusTextBlock.Text = "Jegy betöltés sikertelen";
                    progressRing.Visibility = Visibility.Hidden;
                }
            }

            
        }

        private async void trackerButton_Click(object sender, RoutedEventArgs e)
        {
            if (int.TryParse(IssueNumberTextBox.Text, out var issueId))
                await OpenTimeTracker(issueId);
            
        }

        private async void hoursButton_Click(object sender, RoutedEventArgs e)
        {
            var hoursWindow = new HoursWindow(_manager, _config, _loggerFactory.CreateLogger<HoursWindow>());
            hoursWindow.Show();
        }

        private void updateButton_Click(object sender, RoutedEventArgs e)
        {
            UpdateManager_DownloadCompleted();
        }
    }

    public partial class MainWindow : FluentWindow
    {
        private static readonly Regex _regexFractions = new Regex(@"^[0-9]*(?:\.[0-9]*)?$");
        private static readonly Regex _regexNumbers = new Regex(@"^[0-9]*$");
        private void FracValidation(object sender, TextCompositionEventArgs e)
        {
            var textBox = sender as TextBox;
            // Construct what the text WILL be if we allow this input
            string fullText = HoursTextBox.Text.Insert(HoursTextBox.CaretIndex, e.Text);

            // If the resulting text is not a match, block the input
            e.Handled = !_regexFractions.IsMatch(fullText);
        }
        private void FracPasting(object sender, DataObjectPastingEventArgs e)
        {
            if (e.DataObject.GetDataPresent(typeof(string)))
            {
                string text = (string)e.DataObject.GetData(typeof(string));
                var textBox = sender as TextBox;
                string fullText = HoursTextBox.Text.Insert(HoursTextBox.CaretIndex, text);

                if (!_regexFractions.IsMatch(fullText))
                    e.CancelCommand();

            }
            else
                e.CancelCommand();
        }
        private void NumValidation(object sender, TextCompositionEventArgs e)
        {
            var textBox = sender as TextBox;
            // Construct what the text WILL be if we allow this input
            string fullText = HoursTextBox.Text.Insert(HoursTextBox.CaretIndex, e.Text);

            // If the resulting text is not a match, block the input
            e.Handled = !_regexNumbers.IsMatch(fullText);
        }
        private void NumPasting(object sender, DataObjectPastingEventArgs e)
        {
            if (e.DataObject.GetDataPresent(typeof(string)))
            {
                string text = (string)e.DataObject.GetData(typeof(string));
                var textBox = sender as TextBox;
                string fullText = HoursTextBox.Text.Insert(HoursTextBox.CaretIndex, text);

                if (!_regexNumbers.IsMatch(fullText))
                    e.CancelCommand();

            }
            else
                e.CancelCommand();
        }

        public async Task GetHours()
        {
            todayProgressRing.Visibility =
                yesterdayProgressRing.Visibility =
                monthProgressRing.Visibility = Visibility.Visible;
            var today = await _manager.GetCurrentUserTimeTodayAsync();
            var yesterday = await _manager.GetCurrentUserTimeYesterdayAsync();
            var thisMonth = await _manager.GetCurrentUserTimeThisMonthAsync();

            int workingDays = 0;
            DateTime currentDate = DateTime.Today;

            for (int day = 1; day <= currentDate.Day; day++)
            {
                var dateToCheck = new DateTime(currentDate.Year, currentDate.Month, day);
                if (dateToCheck.DayOfWeek != DayOfWeek.Saturday &&
                    dateToCheck.DayOfWeek != DayOfWeek.Sunday)
                {
                    workingDays++;
                }
            }

            var avgHours = Math.Round(thisMonth/workingDays, 2);

            todayTimeLabel.Text = today.ToString();
            yesterdayTimeLabel.Text = yesterday.ToString();
            monthTimeLabel.Text = thisMonth.ToString();
            averageTimeLabel.Text = avgHours.ToString();

            todayProgressRing.Visibility =
                yesterdayProgressRing.Visibility =
                monthProgressRing.Visibility = Visibility.Hidden;
        }
        public void FilterIssues()
        {
            var list = string.IsNullOrWhiteSpace(searchTextBox.Text)
                ? _issues
                : _issues.Where(issue => issue.Subject.Contains(searchTextBox.Text, StringComparison.OrdinalIgnoreCase)
                    || issue.Id.ToString().Contains(searchTextBox.Text)
                    || issue.ProjectName.Contains(searchTextBox.Text, StringComparison.OrdinalIgnoreCase));
            IssuesList.Clear();
            foreach (var item in list)
            {
                IssuesList.Add(item);
            }
        }
        public async Task LoadIssues()
        {
            _issues.Clear();
            statusTextBlock.Text = "Jegyek letöltése...";
            progressRing.Visibility = Visibility.Visible;
            foreach (var issueId in Constants.StaticTickets)
                _issues.Add(await _manager.GetSimpleIssueAsync(issueId));

            _issues.AddRange(await _manager.GetCurrentUserOpenIssuesAsync(progress: UpdateProgress("Jegyek letöltése:")));
            progressBar.Value = 0;
            progressRing.Visibility = Visibility.Hidden;
            FilterIssues();
            statusTextBlock.Text = "Jegyek letöltve";
        }
        public void DisableUi()
        {
            searchTextBox.IsEnabled =
            //issuesDataGrid.IsEnabled =
            IssueNumberTextBox.IsEnabled =
            HoursTextBox.IsEnabled =
            MessageTextBox.IsEnabled =
            calendarButton.IsEnabled =
            sendButton.IsEnabled =
            closeButton.IsEnabled =
            browserButton.IsEnabled =
            newButton.IsEnabled =
            refreshButton.IsEnabled =
            fixButton.IsEnabled = false;
        }
        public void EnableUi()
        {
            searchTextBox.IsEnabled = 
            //issuesDataGrid.IsEnabled = 
            IssueNumberTextBox.IsEnabled =
            HoursTextBox.IsEnabled =
            MessageTextBox.IsEnabled =
            calendarButton.IsEnabled =
            sendButton.IsEnabled =
            closeButton.IsEnabled =
            browserButton.IsEnabled =
            newButton.IsEnabled =
            refreshButton.IsEnabled =
            fixButton.IsEnabled = true;
        }
        public async Task<bool> TestConnection()
        {
            statusTextBlock.Text = $"Kapcsolódás Redminehoz...";

            int maxRetries = 3;
            int timeoutSeconds = 3; // Force kill after 5s

            for (int i = 0; i < maxRetries; i++)
            {
                try
                {
                    // Creates a token that cancels automatically
                    using var cts = new CancellationTokenSource(TimeSpan.FromSeconds(timeoutSeconds));

                    // Pass the token. If it hangs, this throws OperationCanceledException
                    if (await _manager.IsRedmineAvailable(cts.Token))
                    {
                        EnableUi();
                        apiButton.Appearance = ControlAppearance.Secondary;
                        statusTextBlock.Text = "Kapcsolódva";
                        return true;
                    }
                }
                catch (Exception)
                {
                    // Ignore timeout/error and try again unless it's the last attempt
                    if (i == maxRetries - 1) break;
                }

                statusTextBlock.Text = $"Kapcsolódási hiba. Újrapróbálkozás: {i + 1}/{maxRetries}";

                // Wait 1 second before retrying
                await Task.Delay(5000);
            }

            // All attempts failed
            DisableUi();
            apiButton.Appearance = ControlAppearance.Primary;
            return false;
        }
        public async Task OpenTimeTracker(int issueId)
        {
            var i = await _manager.GetSimpleIssueAsync(issueId);
            var timer = new TimeTrackerWindow(_config, _manager, i);
            timer.Show();
        }
    }
}