using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using WarmlyShip.Entities;
using WarmlyShip.MovementStrategy;

namespace WarmlyShip.DrawningObjects
{
    /// <summary>
    /// Класс, отвечающий за прорисовку и перемещение объекта-сущности
    /// </summary>
    public class DrawningShip
    {
        /// <summary>
        /// Класс-сущность
        /// </summary>
        public EntityShip? EntityShip { get; protected set; }

        /// <summary>
        /// Получение объекта IMoveableObject из объекта DrawningShip
        /// </summary>
        public IMoveableObject GetMoveableObject => new DrawningObjectShip(this);

        /// <summary>
        /// Ширина окна
        /// </summary>
        private int _pictureWidth;
        /// <summary>
        /// Высота окна
        /// </summary>
        private int _pictureHeight;
        /// <summary>
        /// Левая координата прорисовки корабля
        /// </summary>
        protected int _startPosX;
        /// <summary>
        /// Верхняя кооридната прорисовки корабля
        /// </summary>
        protected int _startPosY;
        /// <summary>
        /// Ширина прорисовки корабля
        /// </summary>
        protected readonly int _shipWidth = 140;
        /// <summary>
        /// Высота прорисовки корабля
        /// </summary>
        protected readonly int _shipHeight = 60;
        /// <summary>
        /// Координата X объекта
        /// </summary>
        public int GetPosX => _startPosX;
        /// <summary>
        /// Координата Y объекта
        /// </summary>
        public int GetPosY => _startPosY;
        /// <summary>
        /// Ширина объекта
        /// </summary>
        public int GetWidth => _shipWidth;
        /// <summary>
        /// Высота объекта
        /// </summary>
        public int GetHeight => _shipHeight;

        /// <summary>
        /// Конструктор
        /// </summary>
        /// <param name="speed">Скорость</param>
        /// <param name="weight">Вес</param>
        /// <param name="bodyColor">Основной цвет</param>
        /// <param name="width">Ширина картинки</param>
        /// <param name="height">Высота картинки</param>

        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);
        }

        /// <summary>
        /// Конструктор
        /// </summary>
        /// <param name="speed">Скорость</param>
        /// <param name="weight">Вес</param>
        /// <param name="bodyColor">Основной цвет</param>
        /// <param name="width">Ширина картинки</param>
        /// <param name="height">Высота картинки</param>
        /// <param name="shipWidth">Ширина прорисовки корабля</param>
        /// <param name="shipHeight">Высота прорисовки корабля</param>
        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);
        }

        /// <summary>
        /// Установка позиции
        /// </summary>
        /// <param name="x">Координата X</param>
        /// <param name="y">Координата Y</param>
        public void SetPosition(int x, int y)
        {
            if (x < 0 || x + _shipWidth > _pictureWidth)
            {
                x = Math.Max(0, _pictureWidth - _shipWidth);
            }
            if (y < 0 || y + _shipHeight > _pictureHeight)
            {
                y = Math.Max(0, _pictureHeight - _shipHeight);
            }
            _startPosX = x;
            _startPosY = y;
        }

        /// <summary>
        /// Проверка, что объект может переместится по указанному направлению
        /// </summary>
        /// <param name="direction">Направление</param>
        /// <returns>true - можно переместится по указанному направлению</returns>
        public bool CanMove(DirectionType direction)
        {
            if (EntityShip == null)
            {
                return false;
            }
            return direction switch
            {
                //влево
                DirectionType.Left => _startPosX - EntityShip.Step > 0,
                //вверх
                DirectionType.Up => _startPosY - EntityShip.Step > 0,
                //вправо
                DirectionType.Right => _startPosX + _shipWidth + EntityShip.Step < _pictureWidth,
                //вниз
                DirectionType.Down => _startPosY + _shipHeight + EntityShip.Step < _pictureHeight,
                _ => false,
            };
        }

        /// <summary>
        /// Изменение направления перемещения
        /// </summary>
        /// <param name="direction">Направление</param>
        public void MoveTransport(DirectionType direction)
        {
            if (!CanMove(direction) || EntityShip == null)
            {
                return;
            }
            switch (direction)
            {
                //влево
                case DirectionType.Left:
                    _startPosX -= (int)EntityShip.Step;
                    break;
                //вверх
                case DirectionType.Up:
                    _startPosY -= (int)EntityShip.Step;
                    break;
                // вправо
                case DirectionType.Right:
                    _startPosX += (int)EntityShip.Step;
                    break;
                //вниз
                case DirectionType.Down:
                    _startPosY += (int)EntityShip.Step;
                    break;
            }
        }

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

            Pen pen = new(Color.Black);
            Brush BodyBrush = new SolidBrush(EntityShip.BodyColor);

            // корпус
            Point point1 = new Point(_startPosX, _startPosY + 30);
            Point point2 = new Point(_startPosX + 140, _startPosY + 30);
            Point point3 = new Point(_startPosX + 120, _startPosY + 60);
            Point point4 = new Point(_startPosX + 20, _startPosY + 60);
            Point[] curvePoints = { point1, point2, point3, point4 };
            g.FillPolygon(BodyBrush, curvePoints);
            g.DrawPolygon(pen, curvePoints);
            // палуба
            Brush brBeige = new SolidBrush(Color.Beige);
            g.FillRectangle(brBeige, _startPosX + 10, _startPosY + 20, 110, 10);
            g.DrawRectangle(pen, _startPosX + 10, _startPosY + 20, 110, 10);
            // якорь
            Point point_1 = new Point(_startPosX + 130, _startPosY + 40);
            Point point_2 = new Point(_startPosX + 130, _startPosY + 33);
            g.DrawLine(pen, point_1, point_2);
            Point point_3 = new Point(_startPosX + 130, _startPosY + 40);
            Point point_4 = new Point(_startPosX + 127, _startPosY + 37);
            g.DrawLine(pen, point_3, point_4);
            Point point_5 = new Point(_startPosX + 130, _startPosY + 40);
            Point point_6 = new Point(_startPosX + 133, _startPosY + 37);
            g.DrawLine(pen, point_5, point_6);
            Point point_7 = new Point(_startPosX + 129, _startPosY + 35);
            Point point_8 = new Point(_startPosX + 131, _startPosY + 35);
            g.DrawLine(pen, point_7, point_8);
        }
    }
}