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

namespace DoubleDeckerBus
{
    internal class DrawingBus
    {
        public EntityDoubleDeckerBus? EntityDoubleDeckerBus { get; private set; }
        private int _pictureWidth;
        private int _pictureHeight;
        private int _startPosX;
        private int _startPosY;
        private readonly int _busWidth = 180;
        private readonly int _busHeight = 120;
        public bool Init(EntityDoubleDeckerBus bus, int width, int height)
        {
            _pictureWidth = width;
            _pictureHeight = height;
            EntityDoubleDeckerBus = bus;
            if (_pictureWidth < _busWidth || _pictureHeight < _busHeight)
            {
                return false;
            }
            return true;
        }
        public void SetPosition(int x, int y)
        {
            _startPosX = x;
            _startPosY = y;
            if (_startPosX + _busWidth > _pictureWidth) {
                _startPosX = _pictureWidth - _busWidth;
            } 
            if (_startPosX < 0)
            {
                _startPosX = 0;
            }
            if (_startPosY + _busHeight > _pictureHeight)
            { 
                _startPosY = _pictureHeight - _busHeight;
            }
            if (_startPosY < 0)
            {
                _startPosY = 0;
            }
        }
        public void MoveTransport(Direction direction)
        {
            if (EntityDoubleDeckerBus == null)
        {
                return;
            }
            switch (direction)
            {
                case Direction.Left:
                    if (_startPosX - EntityDoubleDeckerBus.Step > 0)
                    {
                        _startPosX -= (int)EntityDoubleDeckerBus.Step;
                    }
                    break;
                case Direction.Up:
                    if (_startPosY - EntityDoubleDeckerBus.Step > 0)
                    {
                        _startPosY -= (int)EntityDoubleDeckerBus.Step;
                    }
                    break;
                case Direction.Right:
                    if (_startPosX + EntityDoubleDeckerBus.Step + _busWidth < _pictureWidth)
                    {
                        _startPosX += (int)EntityDoubleDeckerBus.Step;
                    }
                    break;
                case Direction.Down:
                     if (_startPosY + EntityDoubleDeckerBus.Step + _busHeight < _pictureHeight)
                    {
                        _startPosY += (int)EntityDoubleDeckerBus.Step;
                    }
                    break;
            }
        }
        public void DrawTransport(Graphics g)
        {
            if (EntityDoubleDeckerBus == null)
            {
                return;
            }
            Pen pen = new(Color.Black);
            Brush bodyColor = new
            SolidBrush(EntityDoubleDeckerBus.BodyColor);
            g.FillRectangle(bodyColor, _startPosX + 147, _startPosY + 52, 21, 20);
            g.FillRectangle(bodyColor, _startPosX + 147, _startPosY + 71, 30, 27);
            g.FillRectangle(bodyColor, _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);

            //ВТОРОЙ ЭТАЖ
            if (EntityDoubleDeckerBus.SecondFloor)
            {
                Brush additionalColor = new
                SolidBrush(EntityDoubleDeckerBus.AdditionalColor);

                g.FillRectangle(additionalColor, _startPosX + 7, _startPosY + 12, 172, 40);

                g.DrawLine(pen, _startPosX + 7, _startPosY + 36, _startPosX + 178, _startPosY + 36);

                g.FillRectangle(brBlue, _startPosX + 15, _startPosY + 15, 15, 15);
                g.FillRectangle(brBlue, _startPosX + 42, _startPosY + 15, 15, 15);
                g.FillRectangle(brBlue, _startPosX + 69, _startPosY + 15, 15, 15);
                g.FillRectangle(brBlue, _startPosX + 96, _startPosY + 15, 15, 15);
                g.FillRectangle(brBlue, _startPosX + 123, _startPosY + 15, 15, 15);
                g.FillRectangle(brBlue, _startPosX + 150, _startPosY + 15, 15, 15);
            }
            //ЛЕСТНИЦА
            if (EntityDoubleDeckerBus.Stairs)
            {
                g.DrawLine(pen, _startPosX + 10, _startPosY + 55, _startPosX + 34, _startPosY + 55);
                g.DrawLine(pen, _startPosX + 10, _startPosY + 58, _startPosX + 34, _startPosY + 58);
                g.DrawLine(pen, _startPosX + 10, _startPosY + 64, _startPosX + 34, _startPosY + 64);
                g.DrawLine(pen, _startPosX + 10, _startPosY + 72, _startPosX + 34, _startPosY + 72);
                g.DrawLine(pen, _startPosX + 10, _startPosY + 80, _startPosX + 34, _startPosY + 80);
                g.DrawLine(pen, _startPosX + 10, _startPosY + 88, _startPosX + 34, _startPosY + 88);
                g.DrawLine(pen, _startPosX + 10, _startPosY + 94, _startPosX + 34, _startPosY + 94);
            }
            // колёса
            Brush gr = new SolidBrush(Color.Gray);
            g.FillEllipse(bodyColor, _startPosX + 23, _startPosY + 88, 25, 25);
            g.FillEllipse(bodyColor, _startPosX + 123, _startPosY + 88, 25, 25);

            g.FillEllipse(gr, _startPosX + 25, _startPosY + 90, 21, 21);
            g.FillEllipse(gr, _startPosX + 125, _startPosY + 90, 21, 21);
        }
    }
}