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

namespace ContainerShip
{
    public class DrawingContainerShip
    {
        public EntityContainerShip? EntityContainerShip { get; private set;}

        private int _pictureWidth;
        private int _pictureHeight;
        private int _startPosX;
        private int _startPosY;
        private readonly int _shipWidth = 140;
        private readonly int _shipHeight = 90;

        public bool Init(int speed, double weight, Color bodyColor, Color additionalColor, bool load, bool crane, int width, int height)
        {
            _pictureWidth = width;
            _pictureHeight = height;
            if ((_pictureWidth < _shipWidth) || (_pictureHeight < _shipHeight))
            {
                return false;
            }
            EntityContainerShip = new EntityContainerShip();
            EntityContainerShip.Init(speed, weight, bodyColor, additionalColor, load, crane);
            return true;

        }
        public void SetPosition (int x, int y)
        {
            _startPosX = x;
            _startPosY = y;
            if (_startPosX + _shipWidth > _pictureWidth)
            {
                _startPosX = _pictureWidth - _shipWidth;
            }

            if (_startPosX < 0)
            {
                _startPosX = 0;
            }

            if (_startPosY + _shipHeight > _pictureHeight)
            {
                _startPosY = _pictureHeight - _shipHeight;
            }

            if (_startPosY < 0)
            {
                _startPosY = 0;
            }
        }

        public void MoveTransport (DirectionType direction)
        {
            if (EntityContainerShip == null) return;
            switch (direction)
            {
                case DirectionType.Left:
                    if (_startPosX - EntityContainerShip.Step > 0)
                    {
                        _startPosX-= (int)EntityContainerShip.Step;
                    }
                    break;
                case DirectionType.Up:
                    if (_startPosY - EntityContainerShip.Step > 0)
                    {
                        _startPosY -= (int)EntityContainerShip.Step;
                    }
                    break;
                case DirectionType.Right:
                    if (_startPosX + EntityContainerShip.Step + _shipWidth < _pictureWidth)
                    {
                        _startPosX += (int)EntityContainerShip.Step;
                    }
                    break;
                case DirectionType.Down:
                    if (_startPosY + EntityContainerShip.Step + _shipHeight < _pictureHeight)
                    {
                        _startPosY += (int)EntityContainerShip.Step;
                    }
                    break;
            }
        }

        public void DrawTransport (Graphics g)
        {
            if (EntityContainerShip == null) { return; }
            Pen pen = new(Color.Black);
            Brush bodyBrush = new SolidBrush(EntityContainerShip.BodyColor);
            Point point1 = new Point(_startPosX, _startPosY + 52);
            Point point2 = new Point(_startPosX + 137, _startPosY + 52);
            Point point3 = new Point(_startPosX + 137 - 20, _startPosY + 52 + 46 - 10);
            Point point4 = new Point(_startPosX + 20, _startPosY + 52 + 46 - 10);

            Point[] p = { point1, point2, point3, point4 };

            g.FillPolygon(bodyBrush, p); //корпус

            Brush additionalBrush = new SolidBrush(EntityContainerShip.AdditionalColor);

            g.FillRectangle(additionalBrush, _startPosX + 15, _startPosY + 32, 80, 20); //прямоугольник

            //груз

            if (EntityContainerShip.Load)
            {
                g.FillRectangle(additionalBrush, _startPosX + 100, _startPosY + 32, 30, 20); //большой прямоугольник
            }

            // кран
            if (EntityContainerShip.Crane)
            {
                g.DrawLine(pen, _startPosX + 90, _startPosY + 32, _startPosX + 120, _startPosY);
                g.DrawLine(pen, _startPosX + 80, _startPosY + 32, _startPosX + 120, _startPosY);
                g.DrawLine(pen, _startPosX + 120, _startPosY, _startPosX + 120, _startPosY + 30);
            }
        }
    }
}