using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ProjectMonorail;

/// <summary>
/// Класс, отвечающий за прорисовку и перемещение объекта-сущности
/// </summary>
public class DrawingMonorail
{
    /// <summary>
    /// Класс-сущность "монорельс"
    /// </summary>
    public EntityMonorail? EntityMonorail { get; private set; }

    /// <summary>
    /// Высота окна
    /// </summary>
    private int? _pictureHeight;

    /// <summary>
    /// Ширина окна
    /// </summary>
    private int? _pictureWidth;

    /// <summary>
    /// Левая координата прорисовки монорельса
    /// </summary>
    private int? _startPosX;

    /// <summary>
    /// Верхняя координата прорисовки монорельса
    /// </summary>
    private int? _startPosY;

    /// <summary>
    /// Высота прорисовки монорельса
    /// </summary>
    private readonly int _drawingMonorailHeight = 40;

    /// <summary>
    /// Ширина прорисовки монорельса
    /// </summary>
    private readonly int _drawingMonorailWidth = 100;

    /// <summary>
    /// Инициализация свойств
    /// </summary>
    /// <param name="speed">Скорость</param>
    /// <param name="weight">Вес</param>
    /// <param name="wheels">Количество колёс</param>
    /// <param name="mainColor">Основной цвет</param>
    /// <param name="additionalColor">Дополнительный цвет</param>
    /// <param name="rail">Признак наличия магнитного рельса</param>
    /// <param name="secondCarriage">Признак наличия второго вагона</param>
    public void Init(int speed, double weight, int wheels, Color mainColor, Color additionalColor, bool rail, bool secondCarriage)
    {
        EntityMonorail = new EntityMonorail();
        EntityMonorail.Init(speed, weight, wheels, mainColor, additionalColor, rail, secondCarriage);
        _pictureHeight = null;
        _pictureWidth = null;
        _startPosX = null;
        _startPosY = null;
    }

    /// <summary>
    /// Установка границ поля
    /// </summary>
    /// <param name="width">Ширина поля</param>
    /// <param name="height">Высота поля</param>
    /// <returns></returns>
    public bool SetPictureSize(int width,  int height)
    {
        //TODO!
        if (_drawingMonorailWidth <= width && _drawingMonorailHeight <= height)
        {
            _pictureWidth = width;
            _pictureHeight = height;
            if (_startPosX.HasValue && _startPosY.HasValue)
            {
                if (_startPosX + _drawingMonorailWidth > _pictureWidth)
                {
                    _startPosX = _pictureWidth - _drawingMonorailWidth;
                }
                if (_startPosY + _drawingMonorailHeight > _pictureHeight)
                {
                    _startPosY = _pictureHeight - _drawingMonorailHeight;
                }
            }
            return true;
        }
        return false;
    }

    /// <summary>
    /// Установка позиции
    /// </summary>
    /// <param name="x">Координата x</param>
    /// <param name="y">Координата y</param>
    public void SetPosition(int x, int y)
    {
        if (!_pictureHeight.HasValue || !_pictureWidth.HasValue)
        {
            return;
        }
        if (x + _drawingMonorailWidth > _pictureWidth.Value)
        {
            x = _pictureWidth.Value - _drawingMonorailWidth;
        }
        if (y + _drawingMonorailHeight > _pictureHeight.Value)
        {
            y = _pictureHeight.Value - _drawingMonorailHeight;
        }
        _startPosX = x;
        _startPosY = y;
    }

    /// <summary>
    /// Изменение направления перемещения
    /// </summary>
    /// <param name="direction">Направление</param>
    /// <returns>true - перемещение выполнено; false - перемещение невозможно</returns>
    public bool MoveTransport(DirectionType direction)
    {
        if (EntityMonorail == null || !_startPosX.HasValue || !_startPosY.HasValue)
        {
            return false;
        }
        
        switch (direction)
        {
            //Перемещение влево
            case DirectionType.Left:
                if (_startPosX.Value - EntityMonorail.Step > 0)
                {
                    _startPosX -= (int)EntityMonorail.Step;
                }
                return true;
            //Перемещение вправо
            case DirectionType.Right:
                if (EntityMonorail.SecondСarriage)
                {
                    if (_startPosX.Value + 180 + EntityMonorail.Step < _pictureWidth)
                    {
                        _startPosX += (int)EntityMonorail.Step;
                    }
                    return true;
                }
                else
                {
                    if (_startPosX.Value + _drawingMonorailWidth + EntityMonorail.Step < _pictureWidth)
                    {
                        _startPosX += (int)EntityMonorail.Step;
                    }
                    return true;
                }
            //Перемещение вверх
            case DirectionType.Up:
                if (_startPosY.Value - EntityMonorail.Step > 0)
                {
                    _startPosY -= (int)EntityMonorail.Step;
                }
                return true;
            //Перемещение вниз
            case DirectionType.Down:
                if (_startPosY.Value + _drawingMonorailHeight + EntityMonorail.Step < _pictureHeight)
                {
                    _startPosY += (int)EntityMonorail.Step;
                }
                return true;
            default: return false;
        }
    }

    /// <summary>
    /// Прорисовка объекта
    /// </summary>
    /// <param name="g"></param>
    public void DrawTransport(Graphics g)
    {
        if (EntityMonorail == null || !_startPosX.HasValue || !_startPosY.HasValue)
        {
            return;
        }

        Pen pen = new(Color.Black);
        Brush mainBrush = new SolidBrush(EntityMonorail.MainColor);
        Brush additionalBrush = new SolidBrush(EntityMonorail.AdditionalColor);
        Brush brBlue = new SolidBrush(Color.LightBlue);
        Brush brWhite = new SolidBrush(Color.White);
        Brush brBlack = new SolidBrush(Color.Black);

        //Границы монорельса
        g.DrawRectangle(pen, _startPosX.Value + 5, _startPosY.Value + 15, 80, 15);
        Point[] points1 = {
        new Point(_startPosX.Value + 10, _startPosY.Value),
        new Point(_startPosX.Value + 85, _startPosY.Value),
        new Point(_startPosX.Value + 85, _startPosY.Value + 15),
        new Point(_startPosX.Value + 5, _startPosY.Value + 15)
    };
        g.DrawPolygon(pen, points1);
        g.FillRectangle(mainBrush, _startPosX.Value + 6, _startPosY.Value + 16, 79, 14);
        Point[] points2 = {
        new Point(_startPosX.Value + 10, _startPosY.Value + 1),
        new Point(_startPosX.Value + 85, _startPosY.Value + 1),
        new Point(_startPosX.Value + 85, _startPosY.Value + 15),
        new Point(_startPosX.Value + 5, _startPosY.Value + 15)
    };
        g.FillPolygon(mainBrush, points2);

        //Держатель 1
        Point[] points_cart1 = {
        new Point(_startPosX.Value, _startPosY.Value + 35),
        new Point(_startPosX.Value + 15, _startPosY.Value + 35),
        new Point(_startPosX.Value + 15, _startPosY.Value + 30),
        new Point(_startPosX.Value + 5, _startPosY.Value + 30)
    };
        g.DrawPolygon(pen, points_cart1);
        g.FillPolygon(brBlack, points_cart1);

        //Держатель 2
        Point[] points_cart2 = {
        new Point(_startPosX.Value + 20, _startPosY.Value + 30),
        new Point(_startPosX.Value + 25, _startPosY.Value + 35),
        new Point(_startPosX.Value + 30, _startPosY.Value + 35),
        new Point(_startPosX.Value + 35, _startPosY.Value + 30)
    };
        g.DrawPolygon(pen, points_cart2);
        g.FillPolygon(brBlack, points_cart2);

        //Держатель 3
        Point[] points_cart3 = {
        new Point(_startPosX.Value + 55, _startPosY.Value + 30),
        new Point(_startPosX.Value + 60, _startPosY.Value + 35),
        new Point(_startPosX.Value + 65, _startPosY.Value + 35),
        new Point(_startPosX.Value + 70, _startPosY.Value + 30)
    };
        g.DrawPolygon(pen, points_cart3);
        g.FillPolygon(brBlack, points_cart3);

        //Держатель 4
        Point[] points_cart4 = {
        new Point(_startPosX.Value + 70, _startPosY.Value + 30),
        new Point(_startPosX.Value + 75, _startPosY.Value + 35),
        new Point(_startPosX.Value + 90, _startPosY.Value + 35),
        new Point(_startPosX.Value + 85, _startPosY.Value + 30)
    };
        g.DrawPolygon(pen, points_cart4);
        g.FillPolygon(brBlack, points_cart4);

        //Окна монорельса
        g.DrawRectangle(pen, _startPosX.Value + 17, _startPosY.Value + 5, 17, 7);
        g.FillRectangle(brBlue, _startPosX.Value + 18, _startPosY.Value + 6, 16, 6);
        g.DrawRectangle(pen, _startPosX.Value + 55, _startPosY.Value + 5, 27, 7);
        g.FillRectangle(brBlue, _startPosX.Value + 56, _startPosY.Value + 6, 26, 6);

        //Дверь монорельса
        g.DrawRectangle(pen, _startPosX.Value + 40, _startPosY.Value + 7, 10, 21);
        g.FillRectangle(brWhite, _startPosX.Value + 41, _startPosY.Value + 8, 9, 20);

        //магнитная рельса
        if (EntityMonorail.Rail)
        {
            if (EntityMonorail.SecondСarriage)
            {
                g.FillRectangle(additionalBrush, _startPosX.Value, _startPosY.Value + 40, 180, 3);
            }
            else
            {
                g.FillRectangle(additionalBrush, _startPosX.Value, _startPosY.Value + 40, 90, 3);
            }
        }

        //Второй вагон
        if (EntityMonorail.SecondСarriage)
        {
            g.DrawRectangle(pen, _startPosX.Value + 95, _startPosY.Value, 80, 30);
            g.FillRectangle(additionalBrush, _startPosX.Value + 96, _startPosY.Value + 1, 79, 29);
            g.FillRectangle(brBlack, _startPosX.Value + 85, _startPosY.Value + 5, 10, 23);
            //Окно
            g.DrawRectangle(pen, _startPosX.Value + 105, _startPosY.Value + 5, 60, 10);
            g.FillRectangle(brBlue, _startPosX.Value + 106, _startPosY.Value + 6, 59, 9);
            //Дверь
            g.DrawRectangle(pen, _startPosX.Value + 105, _startPosY.Value + 5, 10, 23);
            g.FillRectangle(brWhite, _startPosX.Value + 106, _startPosY.Value + 16, 9, 12);
            //Колёса
            g.DrawEllipse(pen, _startPosX.Value + 100, _startPosY.Value + 30, 10, 10);
            g.DrawEllipse(pen, _startPosX.Value + 115, _startPosY.Value + 30, 10, 10);
            g.DrawEllipse(pen, _startPosX.Value + 145, _startPosY.Value + 30, 10, 10);
            g.DrawEllipse(pen, _startPosX.Value + 160, _startPosY.Value + 30, 10, 10);
        }

        //колёса
        //1, 4 колесо
        g.DrawEllipse(pen, _startPosX.Value + 15, _startPosY.Value + 30, 10, 10);
        g.FillEllipse(brWhite, _startPosX.Value + 15, _startPosY.Value + 30, 10, 10);
        g.DrawEllipse(pen, _startPosX.Value + 65, _startPosY.Value + 30, 10, 10);
        g.FillEllipse(brWhite, _startPosX.Value + 65, _startPosY.Value + 30, 10, 10);

        switch (EntityMonorail.Wheels)
        {
            case 3:
                g.DrawEllipse(pen, _startPosX.Value + 30, _startPosY.Value + 30, 10, 10);
                g.FillEllipse(brWhite, _startPosX.Value + 30, _startPosY.Value + 30, 10, 10);
                break;
            case 4:
                g.DrawEllipse(pen, _startPosX.Value + 30, _startPosY.Value + 30, 10, 10);
                g.FillEllipse(brWhite, _startPosX.Value + 30, _startPosY.Value + 30, 10, 10);
                g.DrawEllipse(pen, _startPosX.Value + 50, _startPosY.Value + 30, 10, 10);
                g.FillEllipse(brWhite, _startPosX.Value + 50, _startPosY.Value + 30, 10, 10);
                break;
        }

    }
}