using System;
using System.Collections.Generic;
using System.Drawing.Drawing2D;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ProjectTank
{
    internal class DrawingTank
    {
        public Tank? TankEntity { get; private set; }
        private int pictureWidth;
        private int pictureHeight;
        private int startPosX;
        private int startPosY;
        private readonly int tankWidth = 150;
        private readonly int tankHeight = 100;
        public bool Init(int speed, double weight, Color bodyColor, Color additionalColor, int width, int height, bool isAntiAircraftGun, bool isTankTower)
        {
            if (width <= tankWidth || height <= tankHeight) return false;
            pictureWidth = width;
            pictureHeight = height;
            TankEntity = new Tank();
            TankEntity.Init(speed, weight, bodyColor, additionalColor, isAntiAircraftGun, isTankTower);
            return true;
        }
        public void SetPosition(int x, int y)
        {
            if (TankEntity == null) return;
            startPosX = x;
            startPosX = y;

            if (x + tankWidth >= pictureWidth || y + tankHeight >= pictureHeight)
            {
                startPosX = 1;
                startPosY = 1;
            }
        }
        public void MoveTransport(DirectionType direction)
        {
            if (TankEntity == null) return;

            switch (direction)
            {
                //влево
                case DirectionType.Left:
                    if (startPosX - TankEntity.Step > 0)
                    {
                        startPosX -= (int)TankEntity.Step;
                    }
                    break;
                //вверх
                case DirectionType.Up:
                    if (startPosY - TankEntity.Step > 0)
                    {
                        startPosY -= (int)TankEntity.Step;
                    }
                    break;
                // вправо
                case DirectionType.Right:
                    if (startPosX + TankEntity.Step + tankWidth <= pictureWidth)
                    {
                        startPosX += (int)TankEntity.Step;
                    }
                    break;
                //вниз
                case DirectionType.Down:
                    if (startPosY + TankEntity.Step + tankHeight <= pictureHeight)
                    {
                        startPosY += (int)TankEntity.Step;
                    }
                    break;
            }
        }
        public void DrawTransport(Graphics g)
        {
            if (TankEntity == null) return;

            Pen pen = new(TankEntity.BodyColor);

            // границы
            g.DrawRectangle(new Pen(Color.Red), startPosX, startPosY, tankWidth, tankHeight);

            // гусеница
            GraphicsPath path = new GraphicsPath();

            int cornerRadius = 20;

            path.AddArc(startPosX, startPosY + 65, cornerRadius, cornerRadius, 180, 90);
            path.AddArc(startPosX + tankWidth - cornerRadius, startPosY + 65, cornerRadius, cornerRadius, 270, 90);
            path.AddArc(startPosX + tankWidth - cornerRadius, startPosY + tankHeight - cornerRadius, cornerRadius, cornerRadius, 0, 90);
            path.AddArc(startPosX, startPosY + tankHeight - cornerRadius, cornerRadius, cornerRadius, 90, 90);

            path.CloseFigure();
            g.DrawPath(pen, path);

            // колеса
            g.DrawEllipse(pen, startPosX + 1, startPosY + tankHeight - 5 - 25, 25, 25);
            for (int i = 1; i < 5; i++)
            {
                g.DrawEllipse(pen, startPosX + 30 + (5 * i) + (15 * (i - 1)), startPosY + tankHeight - 5 - 15, 15, 15);
            }
            g.DrawEllipse(pen, startPosX + tankWidth - 25 - 1, startPosY + tankHeight - 5 - 25, 25, 25);

            if (TankEntity.IsTankMuzzle)
            {
                // дуло
                g.DrawRectangle(pen, startPosX + 15, startPosY + 37, 30, 7);
            }

            // башня
            SolidBrush brush = new SolidBrush(TankEntity.AdditionalColor);
            g.FillRectangle(brush, startPosX + 45, startPosY + 30, 60, 25);

            g.FillRectangle(brush, startPosX + 5, startPosY + 55 + 1, tankWidth - 10, 9);

            if (TankEntity.IsAntiAircraftGun)
            {
                // зенитное орудие
                g.DrawRectangle(pen, startPosX + 65, startPosY + 18, 8, 12);
                g.DrawRectangle(pen, startPosX + 65 + 8, startPosY + 16, 8, 14);

                Point[] leftRectanglePoints =
                {
                    new Point(startPosX + 52, startPosY + 5),
                    new Point(startPosX + 67, startPosY + 18),
                    new Point(startPosX + 67 + 5, startPosY + 18),
                    new Point(startPosX + 57, startPosY + 5),
                };

                g.DrawPolygon(pen, leftRectanglePoints);

                Point[] rightRectanglePoints =
                {
                    new Point(startPosX + 59, startPosY),
                    new Point(startPosX + 74, startPosY + 16),
                    new Point(startPosX + 74 + 5, startPosY + 16),
                    new Point(startPosX + 66, startPosY),
                };

                g.DrawPolygon(pen, rightRectanglePoints);
            }
        }
    }
}