/*
 * Copyright (C) 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 Mono.Unix;

using gbrainy.Core.Main;

namespace gbrainy.Games.Logic
{
	public class PuzzleQuadrilaterals : Game
	{
		enum Figures
		{
			FigureA,
			FigureB,
			FigureC,
			FigureD,
			FigureE,
			FigureF,
			Last
		};

		private ArrayListIndicesRandom random_indices;
		private const double figure_size = 0.15;

		public override string Name {
			get {return Catalog.GetString ("Quadrilaterals");}
		}

		public override string Question {
			get {return String.Format (
				Catalog.GetString ("Which of the following figures does not belong to the group? Answer {0}, {1}, {2}, {3}, {4} or {5}."),
					GetPossibleAnswer (0), GetPossibleAnswer (1), GetPossibleAnswer (2), GetPossibleAnswer (3), GetPossibleAnswer (4), 
					GetPossibleAnswer (5));}
		}

		public override string Rationale {
			get {
				return Catalog.GetString ("It is the only figure with all lines of equal length.");
			}
		}

		protected override void Initialize ()
		{
			random_indices = new ArrayListIndicesRandom ((int) Figures.Last);
			random_indices.Initialize ();

			for (int i = 0; i < (int) Figures.Last; i++)
			{
				if ((Figures) random_indices[i] == Figures.FigureA) {
					right_answer = GetPossibleAnswer (i);
					break;
				}
			}
		}

		static void DrawFigure (CairoContextEx gr, double x, double y, Figures figure)
		{
			switch (figure) {
			case Figures.FigureA:
				double x105, y105;

				x105 = figure_size * Math.Cos (105 * Math.PI / 180);
				y105 = figure_size * Math.Sin (105 * Math.PI / 180);
				gr.MoveTo (x, y);
				gr.LineTo (x + x105, y + y105);
				gr.LineTo (x + x105 + figure_size, y + y105);
				gr.Stroke ();
				gr.MoveTo (x + figure_size, y);
				gr.LineTo (x + figure_size + x105, y + y105);
				gr.Stroke ();
				gr.MoveTo (x, y);
				gr.LineTo (x + figure_size, y);
				break;

			case Figures.FigureB:
				gr.Rectangle (x, y, figure_size * 0.8, figure_size * 1.2);
				break;

			case Figures.FigureC:
				gr.MoveTo (x, y);
				gr.LineTo (x + figure_size * 1.3, y);
				gr.LineTo (x + figure_size * 1.3, y + figure_size);
				gr.LineTo (x , y + figure_size);
				gr.LineTo (x, y);
				break;

			case Figures.FigureD:
				gr.MoveTo (x + 0.03, y);
				gr.LineTo (x + figure_size - 0.03, y);
				gr.LineTo (x + figure_size, y + figure_size);
				gr.LineTo (x , y + figure_size);
				gr.LineTo (x + 0.03, y);
				break;

			case Figures.FigureE:
				gr.MoveTo (x + 0.03, y);
				gr.LineTo (x + figure_size - 0.04, y);
				gr.LineTo (x + figure_size - 0.04, y + figure_size * 1.2);
				gr.LineTo (x , y + figure_size  * 1.2);
				gr.LineTo (x + 0.03, y);
				break;

			case Figures.FigureF:
				gr.MoveTo (x, y);
				gr.LineTo (x, y + figure_size);
				gr.LineTo (x + figure_size, y + figure_size);
				gr.LineTo (x + figure_size - 0.02, y);
				gr.LineTo (x, y);
				break;
			}

			gr.Stroke ();

		}

		public override void Draw (CairoContextEx gr, int area_width, int area_height, bool rtl)
		{
			double x = DrawAreaX, y = DrawAreaY, space_x = 0.15;

			base.Draw (gr, area_width, area_height, rtl);

			for (int i = 0; i < random_indices.Count; i++) {
				DrawFigure (gr, x, y, (Figures) random_indices[i]);
				gr.MoveTo (x, y - 0.02 + figure_size * 1.6);
				gr.ShowPangoText (GetPossibleFigureAnswer (i));

				if (i == 2) {
					x = DrawAreaX;
					y += figure_size * 3;
				} else 
					x += figure_size + space_x;
			}
		}
	}
}
