/*
 * Copyright (C) 2007-2008 Jordi Mas i Hernàndez <jmas@softcatala.org>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

using System;
using Cairo;
using Mono.Unix;

using gbrainy.Core.Main;
using gbrainy.Core.Toolkit;

namespace gbrainy.Games.Memory
{
	public class MemoryFiguresNumbers : Core.Main.Memory
	{
		private int [] numbers;
		private int rows, columns, squares;
		private double rect_w, rect_h;
		private ArrayListIndicesRandom answers_order;
		private const int answers = 4;
		private const double block_space = 0.35;

		public override string Name {
			get {return Catalog.GetString ("Figures with numbers");}
		}

		public override string MemoryQuestion {
			get { return String.Format (
				Catalog.GetString ("Which one of these squares was previously shown? Answer {0}, {1}, {2} or {3}."),
				GetPossibleAnswer (0), GetPossibleAnswer (1), GetPossibleAnswer (2), GetPossibleAnswer (3));}
		}

		protected override void Initialize ()
		{
			switch (CurrentDifficulty) {
			case GameDifficulty.Easy:
				columns = rows = 2;
				break;
			case GameDifficulty.Medium:
				columns = rows = 3;
				break;
			case GameDifficulty.Master:
				columns = rows = 4;
				break;
			}

			rect_w = 0.3 / rows;
			rect_h = 0.3 / columns;
			squares = rows * columns;
			numbers = new int [squares * 4];
		
			for (int n = 0; n < rows; n++)
				for (int i = 0; i < columns; i++)
					numbers[(n*columns) + i] = random.Next (10) + random.Next (5);

			Randomize (numbers, 0, squares);
			Randomize (numbers, 0, squares * 2);
			Randomize (numbers, 0, squares * 3);

			answers_order = new ArrayListIndicesRandom (answers);
			answers_order.Initialize ();

			for (int i = 0; i < answers_order.Count; i++) {
				if ((int) answers_order[i] == 0) {
					right_answer = GetPossibleAnswer (i);
					break;
				}
			}

			base.Initialize ();

			HorizontalContainer container = new HorizontalContainer (DrawAreaX, DrawAreaY, 0.8, 0.4);
			AddWidget (container);

			for (int i = 0; i < answers_order.Count; i++) 
			{
				if (i == 2) {
					container = new HorizontalContainer (DrawAreaX, DrawAreaY + 0.45, 0.8, 0.4);
					AddWidget (container);
				}

				DrawableArea drawable_area = new DrawableArea (0.4, 0.4);
				container.AddChild (drawable_area);
				drawable_area.SelectedArea = new Rectangle (0.05, 0, 0.3, 0.3);
				drawable_area.Data = i;
				drawable_area.DataEx = GetPossibleAnswer (i);

				drawable_area.DrawEventHandler += delegate (object sender, DrawEventArgs e)
				{
					int n = (int) e.Data;

					DrawSquare (e.Context, 0.05, 0, numbers, squares * answers_order[n]);
					e.Context.MoveTo (0.05, block_space - 0.02);
					e.Context.ShowPangoText (GetPossibleFigureAnswer (n));
					e.Context.Stroke ();
				};
			}
		}

		private void Randomize (int []nums, int source, int target)
		{	
			int elements = 4 + random.Next (2);
			bool done = false;

			while (done == false) {
				for (int i = 0; i < squares; i++) {
					nums[i + target] = nums[i + source];
				}

				for (int i = 0; i < elements; i++) {
					nums[target + random.Next (squares)] = random.Next (10) + random.Next (5);
				}

				// Is not valid if it is already present
				bool equals = true;
				for (int answer = 0; answer < answers; answer++) {
					if (answer * squares == target)
						continue;

					equals = true;
					for (int i = 0; i < squares; i++) {
						if (nums[i + target] != nums[i + (answer * squares)]) {
							equals = false;
							break;
						}
					}

					if (equals == true)
						break;
				}

				if (equals == false)
					done = true;
			}
		}

		public override void DrawObjectToMemorize (CairoContextEx gr, int area_width, int area_height, bool rtl)
		{
			base.DrawObjectToMemorize (gr, area_width, area_height, rtl);
			DrawSquare (gr, 0.3 + DrawAreaX, DrawAreaY + 0.1, numbers, 0);
		}

		private void DrawSquare (CairoContextEx gr, double x, double y, int[] nums, int index)
		{
			for (int column = 0; column < columns; column++) {
				for (int row = 0; row < rows; row++) {
					gr.Rectangle (x + row * rect_w, y + column * rect_h, rect_w, rect_h);
					gr.Stroke ();
					gr.DrawTextCentered (x + (rect_w / 2) + column * rect_w, y + (rect_h / 2) + row * rect_h,
						(nums[index + column + (row * columns)]).ToString ());
					gr.Stroke ();
				}
			}
		}
	}
}
