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

namespace Catamaran
{
    public class MoveToRightBorder : AbstractStrategy
    {
        protected override bool IsTargetDestinaion()
        {
            var objParams = GetObjectParameters;
            if (objParams == null) return false;

            return objParams.RightBorder <= FieldWidth && objParams.RightBorder + GetStep() > FieldWidth &&
            objParams.DownBorder <= FieldHeight && objParams.DownBorder + GetStep() > FieldHeight;
        }

        protected override void MoveToTarget()
        {
            var objParams = GetObjectParameters;
            if (objParams == null) return;

            var diffX = objParams.ObjectMiddleHorizontal - FieldWidth;
            if (Math.Abs(diffX) > GetStep())
            {
                if (diffX > 0) MoveLeft();
                else MoveRight();
            }

            var diffY = objParams.ObjectMiddleVertical - FieldHeight;
            if (Math.Abs(diffY) > GetStep())
            {
                if (diffY > 0) MoveUp();
                else MoveDown();
            }
        }
    }
}