using System;
using System.Collections.Generic;
using System.Drawing;
using System.Text;
using SelfPropelledArtilleryUnit;
using System.Windows.Forms;

namespace SelfPropelledArtilleryUnit
{
    /// <summary>
    /// Класс, отвечающий за прорисовку и перемещение объекта-сущности
    /// </summary>
    class DrawningTank
    {
        
        /// <summary>
        /// Класс-сущность
        /// </summary>
        public EntityTank? EntityTank { get; private set; }
        /// <summary>
        /// Ширина окна
        /// </summary>
        private int _pictureWidth;
        /// <summary>
        /// Высота окна
        /// </summary>
        private int _pictureHeight;
        /// <summary>
        /// 
        /// Левая координата прорисовки автомобиля
        /// </summary>
        private int _startPosX;
        /// <summary>
        /// Верхняя кооридната прорисовки автомобиля
        /// </summary>
        private int _startPosY;
        /// <summary>
        /// Ширина прорисовки танка
        /// </summary>
        private readonly int _tankWidth = 135;
        /// <summary>
        /// Высота прорисовки танка
        /// </summary>
        private readonly int _tankHeight = 75;

        /// <summary>
        /// Инициализация свойств
        /// </summary>
        /// <param name="speed">Скорость</param>
        /// <param name="weight">Вес</param>
        /// <param name="bodyColor">Цвет кузова</param>
        /// <param name="additionalColor">Дополнительный цвет</param>
        /// <param name="machine_gun">Признак наличия пулемета</param>
        /// <param name="cannon">Признак наличия пушки</param>
        /// <param name="width">Ширина картинки</param>
        /// <param name="height">Высота картинки</param>
        /// <returns>true - объект создан, false - проверка не пройдена,нельзя создать объект в этих размерах</returns>
        public bool Init(int speed, double weight, Color bodyColor, Color additionalColor, bool machine_gun, bool cannon, int width, int height)
        {
            _pictureWidth = width;
            _pictureHeight = height;

            if (_tankHeight >= height)
            {
                return false;
            }
            if (_tankWidth >= width)
            {
                return false;
            }

            EntityTank = new EntityTank();
            EntityTank.Init(speed, weight, bodyColor, additionalColor, machine_gun, cannon);
            return true;

            //EntityTank myTank = new EntityTank();
            //myTank.Init(50, 75.5, Color.Green, Color.Black, true, false, true);
            //return true;
        }

        public void SetPosition(int x, int y)
        {
            if (x < 0 || x > _pictureWidth - _tankWidth)
            {
                x = 0;
            }
            if (y < 0 || y > _pictureHeight - _tankHeight)
            {
                y = 0;
            }

            _startPosX = x;
            _startPosY = y;

        }
        

        public void MoveTransport(Direction direction)
        {
            if (EntityTank == null)
            {
                return;
            }
            switch (direction)
            {
                //влево
                case Direction.Left:
                    if (_startPosX - EntityTank.Step > 0)
                    {
                        _startPosX -= (int)EntityTank.Step;
                    }
                    break;
                //вверх
                case Direction.Up:
                    if (_startPosY - EntityTank.Step > 0)
                    {
                        _startPosY -= (int)EntityTank.Step;
                    }
                    break;

                // вправо
                case Direction.Right:
                    if (_startPosX + EntityTank.Step < _pictureWidth - _tankWidth)
                    {
                        _startPosX += (int)EntityTank.Step;
                    }
                    break;


                //вниз
                case Direction.Down:
                    if (_startPosY + EntityTank.Step < _pictureHeight - _tankHeight)
                    {
                        _startPosY += (int)EntityTank.Step;
                    }
                    break;

            }
        }

        /// <summary>
        /// Прорисовка объекта
        /// </summary>
        /// <param name="g"></param>
        public void DrawTransport(Graphics g)
        {
            if (EntityTank == null)
            {
                return;
            }

            Pen penBlack = new(Color.Black);
            Brush additionalBrush = new SolidBrush(EntityTank.AdditionalColor);

            // пулемет
            if (EntityTank.Machine_gun)
            {
                //залповая усутановка
                g.FillRectangle(additionalBrush, _startPosX + 15, _startPosY + 20, 20, 40);
                g.DrawLine(penBlack, _startPosX + 5, _startPosY + 20, _startPosX + 15, _startPosY + 25);
            }

            //гусеницы
            Brush brBlack = new SolidBrush(Color.Black);
            Brush brBody = new SolidBrush(EntityTank.BodyColor);
            g.FillEllipse(brBlack, _startPosX + 5, _startPosY + 50, 20, 20);
            g.FillEllipse(brBlack, _startPosX + 30, _startPosY + 50, 20, 20);
            g.FillEllipse(brBlack, _startPosX + 55, _startPosY + 50, 20, 20);
            g.FillEllipse(brBlack, _startPosX + 80, _startPosY + 50, 20, 20);
            g.FillEllipse(brBlack, _startPosX + 105, _startPosY + 50, 20, 20);
            g.DrawEllipse(penBlack, _startPosX + 10, _startPosY + 55, 113, 20);
            //пушка
            Point[] pointsGun = new Point[4];
            pointsGun[0].X = _startPosX + 85; pointsGun[0].Y = _startPosY + 25;
            pointsGun[1].X = _startPosX + 80; pointsGun[1].Y = _startPosY + 30;
            pointsGun[2].X = _startPosX - 15; pointsGun[2].Y = _startPosY + 5;
            pointsGun[3].X = _startPosX - 10; pointsGun[3].Y = _startPosY + 0;
            g.FillPolygon(brBody, pointsGun);
            g.DrawPolygon(penBlack, pointsGun);
            //корпус
            Point[] pointsCorp = new Point[4];
            pointsCorp[0].X = _startPosX; pointsCorp[0].Y = _startPosY + 60;
            pointsCorp[1].X = _startPosX + 10; pointsCorp[1].Y = _startPosY + 30;
            pointsCorp[2].X = _startPosX + 130; pointsCorp[2].Y = _startPosY + 30;
            pointsCorp[3].X = _startPosX + 135; pointsCorp[3].Y = _startPosY + 60;
            g.FillPolygon(brBody, pointsCorp);
            g.DrawPolygon(penBlack, pointsCorp);
            //башня
            Point[] pointsHead = new Point[4];
            pointsHead[0].X = _startPosX + 60; pointsHead[0].Y = _startPosY + 30;
            pointsHead[1].X = _startPosX + 65; pointsHead[1].Y = _startPosY + 15;
            pointsHead[2].X = _startPosX + 90; pointsHead[2].Y = _startPosY + 15;
            pointsHead[3].X = _startPosX + 95; pointsHead[3].Y = _startPosY + 30;
            g.FillPolygon(brBody, pointsHead);
            g.DrawPolygon(penBlack, pointsHead);


        }
    }
}