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

using DoubleDeckerbus.Entities;
using DoubleDeckerbus.Move_Strategy;

namespace DoubleDeckerbus.Drawing
{
    public class DrawingBus
    {
        public IMoveableObject GetMoveableObject => new DrawingObjectBus(this);                                    
        public EntityBus? EntityBus { get; protected set; }
        public int _pictureWidth;
        public int _pictureHeight;
        protected int _startPosX;
        protected int _startPosY;
        protected readonly int _busWidth = 175;                                                                                            
        protected readonly int _busHeight = 115;                                         
        public int GetPosX => _startPosX;
        public int GetPosY => _startPosY;
        public int GetWidth => _busWidth;
        public int GetHeight => _busHeight;
        public DrawingBus(int speed, double weight, Color bodyColor, int width, int height)
        {
            if (width < _busWidth || height < _busHeight)
            {
                return;
            }
            _pictureWidth = width;
            _pictureHeight = height;
            EntityBus = new EntityBus(speed, weight, bodyColor);
        }
        protected DrawingBus(int speed, double weight, Color bodyColor, int width, int height, int busWidth, int busHeight)
        {
            if (width < _busWidth || height < _busHeight)
            {
                return;
            }
            _pictureWidth = width;
            _pictureHeight = height;
            _busWidth = busWidth;
            _busHeight = busHeight;
            EntityBus = new EntityBus(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) || EntityBus == null)
            {
                return;
            }
            switch (direction)
            {
                case DirectionType.Left:
                    if (_startPosX - EntityBus.Step > 0)
                    {
                        _startPosX -= (int)EntityBus.Step;
                    }
                    break;
                case DirectionType.Up:
                    if (_startPosY - EntityBus.Step > 0)
                    {
                        _startPosY -= (int)EntityBus.Step;
                    }
                    break;
                case DirectionType.Right:
                    if (_startPosX + _busWidth + EntityBus.Step < _pictureWidth)
                    {
                        _startPosX += (int)EntityBus.Step;
                    }
                    break;
                case DirectionType.Down:
                    if (_startPosY + _busHeight + EntityBus.Step < _pictureHeight)
                    {
                        _startPosY += (int)EntityBus.Step;
                    }
                    break;
            }
        }
        public virtual void DrawTransport(Graphics g)
        {
            Pen pen = new(Color.Black);
            Brush additionalBrush = new
            SolidBrush(EntityBus.BodyColor);
            g.FillRectangle(additionalBrush, _startPosX + 147, _startPosY + 52, 21, 20); 
            g.FillRectangle(additionalBrush, _startPosX + 147, _startPosY + 71, 30, 27); 
            g.FillRectangle(additionalBrush, _startPosX + 10, _startPosY + 52, 137, 46); 
            Brush brBlue = new SolidBrush(Color.LightBlue);
            g.FillRectangle(brBlue, _startPosX + 150, _startPosY + 55, 15, 15);
            g.FillRectangle(brBlue, _startPosX + 42, _startPosY + 55, 15, 15);
            g.FillRectangle(brBlue, _startPosX + 69, _startPosY + 55, 15, 15);
            g.FillRectangle(brBlue, _startPosX + 96, _startPosY + 55, 15, 15);
            g.FillRectangle(brBlue, _startPosX + 123, _startPosY + 55, 15, 15);
            g.DrawLine(pen, _startPosX + 30, _startPosY + 52, _startPosX + 30, _startPosY + 98);
            g.DrawLine(pen, _startPosX + 35, _startPosY + 52, _startPosX + 35, _startPosY + 98);
            Brush gr = new SolidBrush(Color.Gray);
            g.FillEllipse(additionalBrush, _startPosX + 23, _startPosY + 88, 25, 25);
            g.FillEllipse(additionalBrush, _startPosX + 123, _startPosY + 88, 25, 25);
            g.FillEllipse(gr, _startPosX + 25, _startPosY + 90, 21, 21);
            g.FillEllipse(gr, _startPosX + 125, _startPosY + 90, 21, 21);
        }
        public bool CanMove(DirectionType direction)
        {
            if (EntityBus == null)
            {
                return false;
            }
            return direction switch
            {
                DirectionType.Left => _startPosX - EntityBus.Step > 0,
                DirectionType.Up => _startPosY - EntityBus.Step > 0,
                DirectionType.Right => _startPosX + _busWidth + EntityBus.Step < _pictureWidth,
                DirectionType.Down => _startPosY + _busHeight + EntityBus.Step < _pictureHeight,
                _ => false,
            };
        }
        public void ChangeBordersPicture(int width, int height)
        {
            _pictureWidth = width;
            _pictureHeight = height;
        }
    }
}