using Memory.Data;
using Memory.Logic;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Data;
using System.Windows.Media.Imaging;
using System.ComponentModel;

namespace Memory.Gui
{
    public partial class MainWindow : Window, INotifyPropertyChanged
    {
        public const int SCOREPADDING = 160;
        public const int SCOREMARGIN = 30;
        public const int GRIDWIDTH = 700;
        public const int GRIDHEIGHT = 500;

        private Game? game;
        private int _deckSize = 5;

        // Property with propertychanged listener to update it in the ui
        public int DeckSize { get => _deckSize; set
            {
                _deckSize = value;
                OnPropertyChanged(nameof(DeckSize));
            }
        }

        public event PropertyChangedEventHandler? PropertyChanged;

        public MainWindow()
        {
            InitializeComponent();
            DataContext = this;
        }

        private void StartGame(object sender, RoutedEventArgs args)
        {
            // Check if the name is valid, otherwise display error
            string name = Name.Text;
            if (name.Length > 32 || name.Length < 2)
            {
                ErrorLabel.Visibility = Visibility.Visible;
            }
            else
            {
                // Hide startscreen and show gamescreen and create a grid and draw the cards
                game = new(new ScoreHandler(), name, DeckSize);
                ErrorLabel.Visibility = Visibility.Hidden;
                StartScreen.Visibility = Visibility.Hidden;
                FinishScreen.Visibility = Visibility.Hidden;
                GameScreen.Visibility = Visibility.Visible;
                CreateGrid();
                Redraw();
            }
        }

        // Callback functions for changing the size of the deck
        protected void OnPropertyChanged(string propertyName) => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        private void Decrease(object sender, RoutedEventArgs args) => DeckSize = Math.Max(DeckSize - 1, 2);
        private void Increase(object sender, RoutedEventArgs args) => DeckSize = Math.Min(DeckSize + 1, 10);

        // Draw the highscores
        private void DrawScores()
        {
            Highscores.Children.Clear();
            OwnScore.Content = $"Your score: {game!.Scoring.Points}";
            List<Score> highscores = game.ScoreHandler.GetTopScores();
            for (int i = 0; i < highscores.Count; i++)
            {
                Score score = highscores[i];
                Label label = new()
                {
                    Content = $"{i+1}. {score.Name}: {score.Points}",
                    HorizontalAlignment = HorizontalAlignment.Center,
                    VerticalAlignment = VerticalAlignment.Top,
                    FontSize = 30,
                    Margin = new Thickness(0, SCOREPADDING + SCOREMARGIN * i, 0, 0)
                };
                Highscores.Children.Add(label);
            }
        }

        // Enable the finish screen with scores
        private void FinishGame()
        {
            DrawScores();
            GameScreen.Visibility = Visibility.Hidden;
            FinishScreen.Visibility = Visibility.Visible;
        }

        // Draw grid
        private void CreateGrid()
        {
            Cards.ColumnDefinitions.Clear();
            Cards.RowDefinitions.Clear();
            Deck grid = Game.GetGridSize(DeckSize);
            int columns = grid.Columns;
            int rows = grid.Rows;
            for (int i = 0; i < columns; i++)
            {
                ColumnDefinition colDef = new()
                {
                    Width = new(1, GridUnitType.Star)
                };
                Cards.ColumnDefinitions.Add(colDef);
            }
            for (int i = 0; i < rows; i++)
            {
                RowDefinition rowDef = new()
                {
                    Height = new(1, GridUnitType.Star)
                };
                Cards.RowDefinitions.Add(rowDef);
            }
            if (rows > columns)
            {
                Cards.Width = GRIDWIDTH * (double)columns / rows;
            }
            else if (columns > rows)
            {
                Cards.Height = GRIDHEIGHT * (double)rows / columns;
            }
        }

        private void Redraw()
        {
            Cards.Children.Clear();
            Deck grid = Game.GetGridSize(DeckSize);
            // Loop over cards to draw them
            for (int i = 0; i < game!.Cards.Count; i++)
            {
                Card card = game.Cards[i];
                if (!card.Completed)
                {
                    // Draw card with image if card isn't completed
                    Image image = new()
                    {
                        Source = new BitmapImage(new($"pack://application:,,,/images/{card.ID}.png")),
                        Stretch = Stretch.Fill,
                    };
                    Button button = new()
                    {
                        Content = card.Selected() ? image : null,
                        FontSize = 30,
                        Background = new SolidColorBrush(card.Selected() ? Color.FromRgb(0, 255, 0) : Color.FromRgb(255, 0, 0)),
                        Padding = new Thickness(0)
                    };
                    // Set the card in the correct grid position
                    Grid.SetColumn(button, i % grid.Columns);
                    Grid.SetRow(button, i / grid.Columns);
                    button.Click += (object sender, RoutedEventArgs args) =>
                    {
                        // Onclick check if game is finished
                        game.ClickCard(card);
                        if (!game.IsFinished())
                        {
                            Redraw();
                        }
                        else
                        {
                            FinishGame();
                        }
                    };
                    Cards.Children.Add(button);
                }
            }
        }
    }
}