using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Windows.Input;
namespace Digger
{
	class Terrain : ICreature
	{
		public CreatureCommand Act(int x, int y)
		{
			var nothing = new CreatureCommand();
			return nothing;
		}

		public bool DeadInConflict(ICreature conflictedObject)
		{
			return true;
		}

		public int GetDrawingPriority()
		{
			return 0;
		}

		public string GetImageFileName()
		{
			return "Terrain.png";
		}
	}

	class Player : ICreature
	{
		public CreatureCommand Act(int x, int y)
		{
			 var command = new CreatureCommand();
            switch (Game.KeyPressed)
            {
                case Keys.Up: command.DeltaY--; break;
                case Keys.Down: command.DeltaY++; break;
                case Keys.Left: command.DeltaX--; break;
                case Keys.Right: command.DeltaX++; break;
            }
            var newX = x + command.DeltaX;
            var newY = y + command.DeltaY;
            if (newX < 0 || newX >= Game.MapWidth || newY < 0 || newY >= Game.MapHeight
                || Game.Map[newX, newY] is Sack)
                return new CreatureCommand();
            return command;
		}

		public bool DeadInConflict(ICreature conflictedObject)
		{
			if (conflictedObject is Sack)
			{
				Sack sack = (Sack)conflictedObject;
				return sack.AmountBlocks > 0;
			}
			if (conflictedObject is Monster)
				return true;
			else
				return false;
		}

		public int GetDrawingPriority()
		{
			return 0;
		}

		public string GetImageFileName()
		{
			return "Digger.png";
		}
	}

	class Monster : ICreature
	{
		public int[] SearchPlayer()
		{
			for (int x = 0; x < Game.MapHeight; x++)
				for (int y = 0; y < Game.MapWidth; y++)
					if (Game.Map[x, y] is Player)
						return new int[2] { x, y };
			return null;
		}

		public CreatureCommand Act(int x, int y)
		{
			var PlayerLocation = SearchPlayer();

			var monster = new CreatureCommand();
			if (PlayerLocation == null)
				return new CreatureCommand();

			var command = new CreatureCommand();
			var deltaX = PlayerLocation[0] == x ? 0 : (PlayerLocation[0] - x) / Math.Abs(PlayerLocation[0] - x);
			var deltaY = PlayerLocation[1] == y ? 0 : (PlayerLocation[1] - y) / Math.Abs(PlayerLocation[1] - y);
			var newX = x + deltaX;
			var newY = y + deltaY;
			if (Game.Map[newX, y] is null || Game.Map[newX, y] is Player || Game.Map[newX, y] is Gold)
				command.DeltaX += deltaX;
			else if (Game.Map[x, newY] is null || Game.Map[x, newY] is Player || Game.Map[x, newY] is Gold)
				command.DeltaY += deltaY;
			return command;

		}

		public bool DeadInConflict(ICreature conflictedObject)
		   => conflictedObject is Sack || conflictedObject is Monster;

		public int GetDrawingPriority()
		{
			return 0;
		}

		public string GetImageFileName()
		{
			return "Monster.png";
		}

	}

	class Sack : ICreature
	{
		public int AmountBlocks = 0;

		public CreatureCommand Act(int x, int y)
		{
			var command = new CreatureCommand();
			if (y++ < Game.MapHeight - 1 && (Game.Map[x, y] is null || AmountBlocks > 0
				&& (Game.Map[x, y] is Monster || Game.Map[x, y] is Player)))
			{
				AmountBlocks++;
				command.DeltaY++;
			}
			else
			{
				if (AmountBlocks > 1)
					command.TransformTo = new Gold();
				AmountBlocks = 0;
			}
			return command;
		}

		public bool DeadInConflict(ICreature conflictedObject)
		{
			if (conflictedObject is Player)
				if (AmountBlocks > 0)
					conflictedObject.DeadInConflict(this);

			return false;
		}

		public int GetDrawingPriority()
		{
			return 1;
		}

		public string GetImageFileName()
		{
			return "Sack.png";
		}
	}

	class Gold : ICreature
	{
		public CreatureCommand Act(int x, int y)
		{
			return new CreatureCommand();
		}

		public bool DeadInConflict(ICreature conflictedObject)
		{
			if (conflictedObject is Player)
			{
				Game.Scores += 10;
				return true;
			}
			if (conflictedObject is Monster)
				return true;

			else
				return false;
		}

		public int GetDrawingPriority()
		{
			return 0;
		}

		public string GetImageFileName()
		{
			return "Gold.png";
		}
	}
}