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

namespace Caisses
{
    public class GraphicalClient : Client
    {
        const int MAX_CLIENT_SPEED = 5;
        const int MIN_CLIENT_SPEED = -5;

        private PointF _speed;
        private PointF _position;
        private Color _color;
        private Size _size;
        private Rectangle _area;

        public PointF Speed { get => _speed; set => _speed = value; }
        public PointF Position { get => _position; set => _position = value; }
        public Color Color { get => _color; set => _color = value; }
        public Size Size { get => _size; set => _size = value; }
        public Rectangle Area { get => _area; set => _area = value; }

        public GraphicalClient(Point Entrance,Random random):base(random)
        {
            Random = random;
            Position = Entrance;
            //Position = new Point(Random.Next(0, 100), Random.Next(0, 100));
            Speed = new PointF(NextFloat(MIN_CLIENT_SPEED, MAX_CLIENT_SPEED), NextFloat(MIN_CLIENT_SPEED, MAX_CLIENT_SPEED));
            Color = Color.FromArgb(ShoppingTime * 2, 0, 0);
            int clientWidth = Random.Next(20, 30);
            Size = new Size(clientWidth, clientWidth);
        }
        static float NextFloat(float min, float max)
        {
            double val = (Random.NextDouble() * (max - min) + min);
            return (float)val;
        }
        public void Update(Size area)
        {
            //base.Tick();
            Position = checkBounds(Position,area);
            Color = Color.FromArgb(ShoppingTime * 2, 0, 0);
        }
        public void Draw(Bitmap storeImage)
        {
            Update(storeImage.Size);
            Graphics g = Graphics.FromImage(storeImage);
            switch (State)
            {
                case ClientState.Shopping:
                    g.FillEllipse(new SolidBrush(Color), new RectangleF(Position, Size));
                    g.DrawString(ShoppingTime.ToString(), new Font("Arial", 16), new SolidBrush(Color.White),new PointF(Position.X,Position.Y));
                    break;
                case ClientState.Waiting:
                    g.FillEllipse(new SolidBrush(Color.Red), new RectangleF(Position, Size));
                    g.DrawString(WaitingTime.ToString(), new Font("Arial", 16), new SolidBrush(Color.White), new PointF(Position.X, Position.Y));
                    break;
                case ClientState.Inline:
                    //g.FillEllipse(new SolidBrush(Color.Violet), new RectangleF(Position, Size));
                    break;
                case ClientState.Checkout:
                    //g.FillEllipse(new SolidBrush(Color.Green), new RectangleF(Position, Size));
                    //g.DrawString(CheckoutTime.ToString(), new Font("Arial", 16), new SolidBrush(Color.Black), new PointF(Position.X, Position.Y));
                    break;
                default:
                    break;
            }
        }
        public PointF checkBounds(PointF position, Size area)
        {
            PointF newPosition = new PointF(position.X,position.Y);
            /*
            if (position.X < 0)
            {
                newPosition.X = 0;
                Speed = new Point(Speed.X * -1, Speed.Y);
            }
            if (position.X > area.Width)
            {
                newPosition.X = area.Width;
                Speed = new Point(Speed.X * -1, Speed.Y);
            }

            if (position.Y < 0)
            {
                newPosition.Y = 0;
                Speed = new Point(Speed.X, Speed.Y * -1);
            }
            if (position.Y > area.Height)
            {
                newPosition.Y = area.Height;
                Speed = new Point(Speed.X, Speed.Y * -1);
            }*/
            
            if (position.X + Speed.X > 0 && position.X + Size.Width + Speed.X < area.Width)
            {
                newPosition.X = position.X + Speed.X;
            }
            else
            {
                float diff = Math.Abs(position.X + Speed.X);
                newPosition.X = diff;
                //newPosition = new Point(0, position.Y);
                Speed = new PointF(Speed.X * -1,Speed.Y);
                //speed.X += -1; 
            }
            if (position.Y + Speed.Y > 0 && position.Y + Size.Height + Speed.Y < area.Height)
            {
                newPosition.Y = position.Y + Speed.Y;
            }
            else
            {
                float diff = Math.Abs(position.Y + Speed.Y);
                newPosition.Y = diff;
                //newPosition = new Point(position.X, 0);
                Speed = new PointF(Speed.X,Speed.Y * -1);
                //speed.Y *= -1;
            }
            
            return newPosition;
        }
    }
}