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

using ContainerShip.Entities;
using ContainerShip.MovementStrategy;

namespace ContainerShip.DrawningObjects
{
    public class DrawningShip
    {
        public EntityShip? EntityShip { get; protected set; }
        private int _pictureWidth;
        private int _pictureHeight;
        protected int _startPosX;
        protected int _startPosY;
        protected readonly int _shipWidth = 150; 
        protected readonly int _shipHeight = 65;
        public int GetPosX => _startPosX;
        public int GetPosY => _startPosY;
        public int GetWidth => _shipWidth;
        public int GetHeight => _shipHeight;
        public DrawningShip(int speed, double weight, Color bodyColor, int width, int height)
        {
            if (width < _shipWidth || height < _shipHeight)
            {
                return;
            }
            _pictureWidth = width;
            _pictureHeight = height;
            EntityShip = new EntityShip(speed, weight, bodyColor);
        }
        protected DrawningShip(int speed, double weight, Color bodyColor, int width, int height, int shipWidth, int shipHeight)
        {
            if (width < _shipWidth || height < _shipHeight)
            {
                return;
            }
            _pictureWidth = width;
            _pictureHeight = height;
            _shipWidth = shipWidth;
            _shipHeight = shipHeight;
            EntityShip = new EntityShip(speed, weight, bodyColor);
        }
        public void SetPosition(int x, int y)
        {
            if (x > _pictureWidth || y > _pictureHeight)
            {
                return;
            }
            _startPosX = x;
            _startPosY = y;
        }
        public void MoveTransport(DirectionType direction)
        {
            if (!CanMove(direction) || EntityShip == null)
            {
                return;
            }
            switch (direction)
            {
                case DirectionType.Left:
                    if (_startPosX - EntityShip.Step > 0)
                    {
                        _startPosX -= (int)EntityShip.Step;
                    }
                    break;
                case DirectionType.Up:
                    if (_startPosY - EntityShip.Step > 0)
                    {
                        _startPosY -= (int)EntityShip.Step;
                    }
                    break;
                case DirectionType.Right:
                    if (_startPosX + _shipWidth + EntityShip.Step < _pictureWidth)
                    {
                        _startPosX += (int)EntityShip.Step;
                    }
                    break;
                case DirectionType.Down:
                    if (_startPosY + _shipHeight + EntityShip.Step < _pictureHeight)
                    {
                        _startPosY += (int)EntityShip.Step;
                    }
                    break;
            }
        }
        public virtual void DrawTransport(Graphics g)
        {
            Pen pen = new(Color.Black);
            Brush bodyBrush = new SolidBrush(EntityShip.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);

            g.FillRectangle(bodyBrush, _startPosX + 15, _startPosY + 32, 80, 20);
        }
        public bool CanMove(DirectionType direction)
        {
            if (EntityShip == null)
            {
                return false;
            }
            return direction switch
            {
                DirectionType.Left => _startPosX - EntityShip.Step > 0,
                DirectionType.Up => _startPosY - EntityShip.Step > 0,
                DirectionType.Right => _startPosX + _shipWidth + EntityShip.Step < _pictureWidth,
                DirectionType.Down => _startPosY + _shipHeight + EntityShip.Step < _pictureHeight,
                _ => false,
            };
        }
        public IMoveableObject GetMoveableObject => new DrawingObjectShip(this);

    }
}