using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;

namespace Tetris.Models;

public class Game : INotifyPropertyChanged {
    private Random _random = new Random();
    
    private string _userName;

    public string UserName {
        get => _userName;
        set {
            _userName = value;
            OnPropertyChanged("UserName");
        }
    }

    private int _score;
    
    public int Score {
        get => _score;
        set {
            _score = value;
            OnPropertyChanged("Score");
        }
    }

    private Grid _grid;

    public Grid Grid => _grid;

    private Tetrominoe? _currentTetrominoe;
    public Tetrominoe? CurrentTetrominoe => _currentTetrominoe;

    private Tetrominoe? _nextTetrominoe;
    public Tetrominoe? NextTetrominoe => _nextTetrominoe;

    public Game(string userName, Grid grid) {
        _userName = userName;
        _grid = grid;
        _currentTetrominoe = GetNewTetrominoe();
        _nextTetrominoe = GetNewTetrominoe();
    }

    public bool HitBottom() {
        if (_currentTetrominoe == null)
            return false;

        return !_grid.CanGo(_currentTetrominoe, _currentTetrominoe.Coordinates + new Size(0, 1));
    }

    public bool HitTop() {
        if (_currentTetrominoe == null)
            return false;
        else if (_grid.CanGo(_currentTetrominoe, _currentTetrominoe.Coordinates + new Size(0, 1)))
            return false;

        return _grid.MinGrid.Y == _currentTetrominoe.Coordinates.Y;
    }

    public bool LineFull() {
        return _grid.LineFull();
    }
    
    public void ClearLine() {
        _grid.ClearLine();
    }

    public void PrintTetrominoe() {
        if (_currentTetrominoe == null)
            return;
        
        _grid.PrintTetrominoe(_currentTetrominoe);
        _currentTetrominoe = _nextTetrominoe;
        _nextTetrominoe = GetNewTetrominoe();
    }

    public Tetrominoe GetNewTetrominoe() {
        List<String> tetrominoes = TetrominoeParser.List();
        return new Tetrominoe(_grid, tetrominoes[_random.Next(tetrominoes.Count)]);
    }

    public event PropertyChangedEventHandler PropertyChanged;

    protected virtual void OnPropertyChanged(string propertyName)
    {
        if (PropertyChanged != null)
            PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
    }
}