using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using System;


class Tractor
{
    static private Vector2 Position;
    private Vector2 TargetPosition;
    private Vector2 Direction;
    private int Spacing, sizeTile;
    private int Speed = 1;
    private Vector2 Size;
    private Random r = new Random();
    private Farm farm = new Farm();
    private Vector2 housePos;
    private String currentTask;
    private SmartTractor smartTractor = new SmartTractor();
    private int Score;
    private int previousTask;

    public void updateSizing(Input input, int Status, Vector2 newHousePos)
    {
        Spacing = input.getSpacing();
        sizeTile = input.getTileSize();
        Size = input.getSize();
        updatePosition(input.getSize(), Status);
        housePos = newHousePos;
    }


    public void init(Rectangle house)
    {
        sizeTile = 56;
        Spacing = 1;
        farm.init(new Vector2(100, (GraphicsAdapter.DefaultAdapter.CurrentDisplayMode.Height / sizeTile) - 125 / sizeTile));
        Position = housePos;
    }

    private int updateDirection(Vector2 Size, Vector2 newPosition) /// Runs when the tractor reaches a tile
    {
        Vector2 DeltaPosition = TargetPosition - Position;
        if (DeltaPosition.X == 0)
        {
            if (DeltaPosition.Y == 0)
            {


                
                if (housePos != Position)
                {
                    int x = (int)Position.X / (sizeTile + Spacing);
                    int y = (int)Position.Y / (sizeTile + Spacing);
                    currentTask = currentTaskDecider(farm.getCrop(x, y).Status, 0);
                    farm.setCropStatus(x, y, Spacing);
                    setTargetPosition(housePos);                                                                            //Returns to the farm
                    
                }
                else
                {
                    setTargetPosition(smartTractor.returnChoice());   //Sets a random Target
                    int xTarget = (int)TargetPosition.X / (sizeTile + Spacing);
                    int yTarget = (int)TargetPosition.Y / (sizeTile + Spacing);
                    currentTask = currentTaskDecider(farm.getCrop(xTarget, yTarget).Status, 1);


                }
                
                return 1;
            }
            else if (DeltaPosition.Y > 0)
            {
                Direction = new Vector2(0, 1);
                return 0;
            }
            else if (DeltaPosition.Y < 0)
            {
                Direction = new Vector2(0, -1);
                return 0;
            }
            return 0;
        }
        else if (DeltaPosition.X > 0)
        {
            Direction = new Vector2(1, 0);
            return 0;
        }
        else if (DeltaPosition.X < 0)
        {
            Direction = new Vector2(-1, 0);
            return 0;
        }
        return 0;

    }

    public void updatePosition(Vector2 Size, int Status) /// updates the position
    {
        
        farm.updateSize(Size, sizeTile, Spacing);
        for (int i = 0; i < Speed; i++) //Where all the choices the tractor does comes from
        {
            smartTractor.updateMap(Position, housePos, farm.getCrops(), Size, sizeTile, Spacing, Score);
            Position = Position + Direction;
            updateDirection(Size, Position);

        }


    }



    public Vector2 getPos()
    {
        return Position;
    }
    
    public void increaseSpeed()
    {
        Speed++;
    }
    
    public void decreaseSpeed()
    {
        if (Speed > 0)
        {
            Speed--;
        }

    }

    private void setTargetPosition(Vector2 newPosition) /// sets the TargetPosition once it reaches its destination
    {
        TargetPosition = newPosition;
    }
    public void setSpeed(int newSpeed)
    {
        Speed = newSpeed;
    }

    public int getSpeed()
    {
        return Speed;
    }

    public void setPos(Vector2 newPos)
    {
        Position = newPos;
    }

    public Farm getFarm()
    {
        return farm;
    }

    public Vector2 getTargetPosition()
    {
        return TargetPosition;
    }

    public String getCurrentTask()
    {
        return currentTask;
    }

    public int getScore()
    {
        return Score;
    }

    private String currentTaskDecider(int Status, int Stage)
    {
        previousTask = Status;
        if (previousTask == 3 && Stage != 1)
        {
            Score++;
        }
        if (Stage == 0)
        {
            if (Status == 0)
            {
                return "Returning with nothing after going out for a stroll";
            }
            else if (Status == 1)
            {
                return "Returning with nothing after planting seeds";
            }
            else if (Status == 2)
            {
                return "Returning with nothing after adding fertilizer";
            }
            else if (Status == 3)
            {
                return "Returning with Crops";
            }
        }
        else
        {
            if (Status == 0)
            {
                return "Going for a stroll";
            }
            else if (Status == 1)
            {
                return "Planting seeds";
            }
            else if (Status == 2)
            {
                return "Adding fertilizer";
            }
            else if (Status == 3)
            {
                return "Going for Crops";
            }
        }
        return null;
    }
}