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

namespace WinFormsApp1
{
    class TractorDraw

    {
        //Сущность
        public EntityTractor Tractor { get; private set; }
        /// Левая координата отрисовки сущности
        private float startPosX;
        /// Верхняя кооридната отрисовки сущности
        private float startPosY;
        /// Ширина окна отрисовки
        private int? pictureWidth = null;
        /// Высота окна отрисовки
        private int? pictureHeight = null;
        /// Ширина отрисовки сущности
        private readonly int entWidth = 130;
        /// Высота отрисовки сущности
        private readonly int entHeight = 100;

        public void Init(int speed, float weight, Color bodycolor)
        {
            Tractor = new EntityTractor();
            Tractor.Init(speed, weight, bodycolor);
        }

        //Установка позиции сущности
        public void SetPosition(int x, int y, int width, int height)
        {
            if (x < 0 || y < 0 || width < x + entWidth || height < y + entHeight)
            {
                pictureHeight = null;
                pictureWidth = null;
                return;
            }
            startPosX = x;
            startPosY = y;
            pictureHeight = height;
            pictureWidth = width;
        }

        //Изменение направления перемещения
        public void MoveTransport(Direction direction)
        {
            if (!pictureWidth.HasValue || !pictureHeight.HasValue)
            {
                return;
            }
            switch (direction)
            {
                case Direction.Right:
                    if (startPosX + entWidth + Tractor.Step < pictureWidth)
                    {
                        startPosX += Tractor.Step;
                    }
                    break;
                case Direction.Left:
                    if (startPosX - 10 - Tractor.Step > 0)
                    {
                        startPosX -= Tractor.Step;
                    }
                    break;
                case Direction.Down:
                    if (startPosY + entHeight + Tractor.Step < pictureHeight)
                    {
                        startPosY += Tractor.Step;
                    }
                    break;
                case Direction.Up:
                    if (startPosY - Tractor.Step > 0)
                    {
                        startPosY -= Tractor.Step;
                    }
                    break;
                case Direction.DRDiagonal:
                    if (startPosX + entWidth + Tractor.Step < pictureWidth && startPosY + entHeight + Tractor.Step < pictureHeight)
                    {
                        startPosX += Tractor.Step;
                        startPosY += Tractor.Step;
                    }
                    break;
                case Direction.DLDiagonal:
                    if (startPosY + entHeight + Tractor.Step < pictureHeight && startPosX - 10 - Tractor.Step > 0)
                    {
                        startPosY += Tractor.Step;
                        startPosX -= Tractor.Step;
                    }
                    break;
                case Direction.URDiagonal:
                    if (startPosY - Tractor.Step > 0 && startPosX + entWidth + Tractor.Step < pictureWidth)
                    {
                        startPosY -= Tractor.Step;
                        startPosX += Tractor.Step;
                    }
                    break;
                case Direction.ULDiagonal:
                    if (startPosY - Tractor.Step > 0 && startPosX - 10 - Tractor.Step > 0)
                    {
                        startPosY -= Tractor.Step;
                        startPosX -= Tractor.Step;
                    }
                    break;

            }
        }

        //Отрисовка сущности
        public void DrawEntity(Graphics g)
        {
            if (startPosX < 0 || startPosY < 0 || !pictureHeight.HasValue || !pictureWidth.HasValue)
            {
                return;
            }

            Pen pen_Black_1pxl = new Pen(Color.Black, 1);
            Pen pen_Black_2pxl = new Pen(Color.Black, 2);

            g.DrawRectangle(pen_Black_1pxl, startPosX, startPosY, 40, 30);
            g.DrawRectangle(pen_Black_1pxl, startPosX, startPosY + 30, 100, 35);
            g.DrawRectangle(pen_Black_1pxl, startPosX + 72, startPosY + 10, 5, 20);
            g.DrawEllipse(pen_Black_1pxl, startPosX - 15, startPosY + 67, 30, 30);
            g.DrawEllipse(pen_Black_1pxl, startPosX + 85, startPosY + 67, 30, 30);
            g.DrawEllipse(pen_Black_1pxl, startPosX + 20, startPosY + 82, 15, 15);
            g.DrawEllipse(pen_Black_1pxl, startPosX + 40, startPosY + 82, 15, 15);
            g.DrawEllipse(pen_Black_1pxl, startPosX + 60, startPosY + 82, 15, 15);
            g.DrawEllipse(pen_Black_1pxl, startPosX + 35, startPosY + 68, 10, 10);
            g.DrawEllipse(pen_Black_1pxl, startPosX + 55, startPosY + 68, 10, 10);

            g.DrawLine(pen_Black_2pxl, startPosX, startPosY + 67, startPosX + 100, startPosY + 67);
            g.DrawLine(pen_Black_2pxl, startPosX, startPosY + 97, startPosX + 100, startPosY + 97);

            Brush br = new SolidBrush(Tractor?.BodyColor ?? Color.Black);
            g.FillRectangle(br, startPosX, startPosY, 40, 30);
            g.FillRectangle(br, startPosX, startPosY + 30, 100, 35);

            Brush brBlack = new SolidBrush(Color.Black);
            g.FillRectangle(brBlack, startPosX + 72, startPosY + 10, 5, 20);
            g.FillEllipse(brBlack, startPosX - 15, startPosY + 67, 30, 30);
            g.FillEllipse(brBlack, startPosX + 85, startPosY + 67, 30, 30);
            g.FillEllipse(brBlack, startPosX + 20, startPosY + 82, 15, 15);
            g.FillEllipse(brBlack, startPosX + 40, startPosY + 82, 15, 15);
            g.FillEllipse(brBlack, startPosX + 60, startPosY + 82, 15, 15);
            g.FillEllipse(brBlack, startPosX + 35, startPosY + 68, 10, 10);
            g.FillEllipse(brBlack, startPosX + 55, startPosY + 68, 10, 10);
        }

        //Смена границ формы
        public void ChangeBorders(int width, int height)
        {
            pictureWidth = width;
            pictureHeight = height;
            if (pictureWidth <= entWidth || pictureHeight <= entHeight)
            {
                pictureWidth = null;
                pictureHeight = null;
                return;
            }
            if (startPosX + entWidth > pictureWidth)
            {
                startPosX = pictureWidth.Value - entWidth;
            }
            if (startPosY + entHeight > pictureHeight)
            {
                startPosY = pictureHeight.Value - entHeight;
            }
        }
    }
}