using CineBook.Data;
using CineBook.Helpers;
using CineBook.Models;
using System.Windows;
using System.Windows.Controls;

namespace CineBook.Views;

public partial class ScreeningsView : UserControl
{
    private readonly Repository _repo;
    private Screening? _selected;

    public ScreeningsView(Repository repo)
    {
        InitializeComponent();
        _repo = repo;
        if (!Session.IsAdmin)
        {
            BtnAdd.Visibility = Visibility.Collapsed;
            BtnEdit.Visibility = Visibility.Collapsed;
            BtnDelete.Visibility = Visibility.Collapsed;
        }
        LoadMovieFilter();
        LoadScreenings();
    }

    private void LoadMovieFilter()
    {
        try
        {
            var movies = _repo.GetMovies(onlyActive: true);
            MovieFilter.Items.Clear();
            MovieFilter.Items.Add(new ComboBoxItem { Content = "— Alle Filme —", Tag = 0, Foreground = System.Windows.Media.Brushes.Gray, FontFamily = new System.Windows.Media.FontFamily("Courier New") });
            foreach (var m in movies)
                MovieFilter.Items.Add(new ComboBoxItem { Content = m.Title, Tag = m.MovieID, Foreground = System.Windows.Media.Brushes.Gold, FontFamily = new System.Windows.Media.FontFamily("Courier New") });
            MovieFilter.SelectedIndex = 0;
        }
        catch { }
    }

    private void LoadScreenings()
    {
        try
        {
            var list = _repo.GetScreenings();
            ScreeningsGrid.ItemsSource = list;
            StatusText.Text = $"● {list.Count} Vorführungen geladen.";
        }
        catch (System.Exception ex) { StatusText.Text = "⚠ Fehler: " + ex.Message; }
    }

    private void FilterChanged(object sender, SelectionChangedEventArgs e)
    {
        if (MovieFilter.SelectedItem is ComboBoxItem item && item.Tag is int id && id > 0)
        {
            try { ScreeningsGrid.ItemsSource = _repo.GetScreeningsByMovie(id); }
            catch (System.Exception ex) { StatusText.Text = "⚠ " + ex.Message; }
        }
        else LoadScreenings();
    }

    private void GridSelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        _selected = ScreeningsGrid.SelectedItem as Screening;
        BtnDelete.IsEnabled = _selected != null && Session.IsAdmin;
        BtnEdit.IsEnabled = _selected != null && Session.IsAdmin;
        BtnBookSeat.IsEnabled = _selected != null && _selected.AvailableSeats > 0;
    }

    private void LoadAllClick(object sender, RoutedEventArgs e)
    {
        MovieFilter.SelectedIndex = 0;
        LoadScreenings();
    }

    private void AddClick(object sender, RoutedEventArgs e)
    {
        var movies = _repo.GetMovies(onlyActive: true);
        var dlg = new ScreeningEditDialog(movies);
        if (dlg.ShowDialog() == true && dlg.Result != null)
        {
            try { _repo.CreateScreening(dlg.Result); LoadScreenings(); LoadMovieFilter(); }
            catch (System.Exception ex) { MessageBox.Show("DB-Fehler: " + ex.Message); }
        }
    }

    private void EditClick(object sender, RoutedEventArgs e)
    {
        if (_selected == null) return;
        var movies = _repo.GetMovies(onlyActive: true);
        var dlg = new ScreeningEditDialog(movies, _selected);
        if (dlg.ShowDialog() == true && dlg.Result != null)
        {
            try
            {
                if (_repo.UpdateScreening(dlg.Result))
                    LoadScreenings();
                else
                    MessageBox.Show("Fehler beim Speichern.", "Fehler", MessageBoxButton.OK, MessageBoxImage.Error);
            }
            catch (System.Exception ex)
            {
                MessageBox.Show("DB-Fehler: " + ex.Message);
            }
        }
    }

    private void DeleteClick(object sender, RoutedEventArgs e)
    {
        if (_selected == null) return;
        var r = MessageBox.Show($"Vorführung löschen?", "Bestätigung", MessageBoxButton.YesNo, MessageBoxImage.Warning);
        if (r == MessageBoxResult.Yes)
        {
            try { _repo.DeleteScreening(_selected.ScreeningID); LoadScreenings(); }
            catch (System.Exception ex) { MessageBox.Show("DB-Fehler: " + ex.Message); }
        }
    }

    private void BookSeatClick(object sender, RoutedEventArgs e)
    {
        if (_selected == null) return;
        var seats = _repo.GetSeatsByScreening(_selected.ScreeningID);
        if (seats.Count == 0)
        {
            if (Session.IsAdmin)
            {
                var r = MessageBox.Show(
                    "Für diese Vorführung existieren noch keine Sitzplätze.\nSoll jetzt automatisch ein Sitzplan erstellt werden?",
                    "Sitzplan fehlt",
                    MessageBoxButton.YesNo,
                    MessageBoxImage.Question);
                if (r == MessageBoxResult.Yes)
                {
                    if (_repo.EnsureSeatsForScreening(_selected.ScreeningID, _selected.TotalSeats))
                        seats = _repo.GetSeatsByScreening(_selected.ScreeningID);
                }
            }
            if (seats.Count == 0)
            {
                MessageBox.Show("Keine Sitzplatzdaten verfügbar.", "Hinweis");
                return;
            }
        }
        var dlg = new SeatSelectionDialog(_selected, seats, Session.CurrentUser!);
        if (dlg.ShowDialog() == true)
        {
            try
            {
                _repo.CreateBooking(Session.CurrentUser!.UserID, dlg.SelectedScreeningId, dlg.SelectedSeatId, dlg.TotalPrice);
                LoadScreenings();
                MessageBox.Show($"✓ Buchung erfolgreich!\nSitz: {dlg.SeatDisplay}\nPreis: {dlg.TotalPrice:F2} €",
                    "Buchung bestätigt", MessageBoxButton.OK, MessageBoxImage.Information);
            }
            catch (System.Exception ex) { MessageBox.Show("DB-Fehler: " + ex.Message); }
        }
    }
}