///
///    This file is part of ILNumerics Community Edition.
///
///    ILNumerics Community Edition - high performance computing for applications.
///    Copyright (C) 2006 - 2012 Haymo Kutschbach, http://ilnumerics.net
///
///    ILNumerics Community Edition is free software: you can redistribute it and/or modify
///    it under the terms of the GNU General Public License version 3 as published by
///    the Free Software Foundation.
///
///    ILNumerics Community Edition 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 ILNumerics Community Edition. See the file License.txt in the root
///    of your distribution package. If not, see <http://www.gnu.org/licenses/>.
///
///    In addition this software uses the following components and/or licenses: 
///
///    =================================================================================
///    The Open Toolkit Library License
///    
///    Copyright (c) 2006 - 2009 the Open Toolkit library.
///    
///    Permission is hereby granted, free of charge, to any person obtaining a copy
///    of this software and associated documentation files (the "Software"), to deal
///    in the Software without restriction, including without limitation the rights to 
///    use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
///    the Software, and to permit persons to whom the Software is furnished to do
///    so, subject to the following conditions:
///
///    The above copyright notice and this permission notice shall be included in all
///    copies or substantial portions of the Software.
///
///    =================================================================================
///    

using System.Collections.Generic;
using System.Drawing;
using ILNumerics.Drawing.Interfaces;
using ILNumerics.Drawing.Misc;
using ILNumerics.Exceptions; 

namespace ILNumerics.Drawing.Plots {
    
    /// <summary>
    /// Simple 3D Bar Graph - plot
    /// </summary>
    public sealed class ILBarGraph3D : ILPlot, IILPanelConfigurator {

        #region attributes
        ILLitBox3D[,] m_boxes;
        float m_barLengthX = 1.0f;
        float m_barLengthY = 1.0f;
        float m_paddingX = 0.3f;
        float m_paddingY = 0.4f;
        Color m_barColor = Color.FromArgb(170, 210, 210, 255); 
        Color m_barColorGradient = Color.FromArgb(170, 180, 180, 255);
        #endregion

        /// <summary>
        /// create a new 3D Bar Graph plot, provide data matrix
        /// </summary>
        /// <param name="panel">panel hosting the scene</param>
        /// <param name="data">data matrix, at least 2x2 entries</param>
        public ILBarGraph3D(ILPanel panel, ILInArray<float> data)
            : base(panel) {
            using (ILScope.Enter(data)) {
                if (data == null)
                    throw new ILArgumentException("data argument must not be null!");
                create(data, Colormaps.ILNumerics);
            }
        }
        /// <summary>
        /// get/set opacity of the bars
        /// </summary>
        public byte Opacity {
            set {
                foreach (ILLitBox3D box in m_boxes) {
                    box.Opacity = value; 
                }
            }
        }
        /// <summary>
        /// individual access to each bar (ILLitBox) 
        /// </summary>
        /// <param name="row">row index, 0 based</param>
        /// <param name="col">column index, 0 based</param>
        /// <returns>lit box shape at specified position</returns>
        public ILLitBox3D this[int row, int col] {
            get { 
                return m_boxes[row,col];   
            }
        }

        #region public interface
        /// <summary>
        /// set axes labels and tick labels at once
        /// </summary>
        /// <param name="panel">panel hosting the plot</param>
        /// <param name="xlabel">label text for x axis</param>
        /// <param name="ylabel">label text for y axis</param>
        /// <param name="zlabel">label text for z axis</param>
        /// <param name="xtickLabels">collection of strings for columns labels (x-direction)</param>
        /// <param name="ytickLabels">collection of strings for row labels (x-direction)</param>
        public void SetLabels(ILPanel panel
                                , string xlabel, string ylabel, string zlabel
                                , ICollection<string> xtickLabels
                                , ICollection<string> ytickLabels
                                ) {
            panel.Axes[0].LabeledTicks.Clear();
            int counter = 0;
            if (xtickLabels != null)
                foreach (string s in xtickLabels) {
                    panel.Axes[0].LabeledTicks.Add(m_boxes[0, counter].Center.X, s);
                    counter++;
                }
            panel.Axes[1].LabeledTicks.Clear();
            counter = 0;
            if (ytickLabels != null)
                foreach (string s in ytickLabels) {
                    panel.Axes[1].LabeledTicks.Add(m_boxes[counter, 0].Center.Y, s);
                    counter++;
                }
            panel.Axes[0].Label.Text = xlabel;
            panel.Axes[1].Label.Text = ylabel;
            panel.Axes[2].Label.Text = zlabel;

        }

        #endregion

        #region private helper
        private void create(ILInArray<float> data, Colormaps colormap) {
            using (ILScope.Enter(data)) {
                ILArray<float> dataF = ILMath.check(data);
                m_boxes = new ILLitBox3D[data.Size[0], data.Size[1]];
                float maxY = data.Size[0] * (m_barLengthY + m_paddingY);
                // prepare coloring for top quads 
                ILColormap cmap = new ILColormap(colormap);
                float minV, maxV, mult;
                dataF.GetLimits(out minV, out maxV);
                if (maxV > minV) {
                    mult = (cmap.Length - 1) / (maxV - minV);
                } else {
                    minV = 0;
                    mult = 0;
                }
                for (int r = 0; r < data.Size[0]; r++) {
                    for (int c = 0; c < data.Size[1]; c++) {
                        float val = dataF.GetValue(r, c);
                        ILPoint3Df max = new ILPoint3Df(
                            (float)(c * (m_paddingX + m_barLengthX) + m_barLengthX)
                            , (float)(maxY - r * (m_paddingY + m_barLengthY))
                            , val);
                        ILPoint3Df min = new ILPoint3Df(
                            max.X - m_barLengthX
                            , max.Y - m_barLengthY
                            , 0);
                        Color topColor = cmap.Map((double)(val - minV) * mult);
                        ILLitBox3D box = new ILLitBox3D(m_panel, min, max, m_barColor, topColor);
                        box.GradientColor = m_barColorGradient;
                        box.TopLabel.Color = topColor;
                        box.TopLabel.Text = "";
                        m_boxes[r, c] = box;
                        Add(box);
                    }
                }
            }
        }
        #endregion


        #region IILPanelConfigurator Members
        /// <summary>
        /// configure default view of panel, called when adding the plot to the panel
        /// </summary>
        /// <param name="panel">panel hosting the plot</param>
        public void ConfigurePanel(ILPanel panel) {
            panel.BackgroundFilled = false;
            panel.ClipViewData = false;
            panel.Axes.LinesVisible = false;
            panel.Projection = Projection.Perspective;
            panel.DefaultView.SetDeg(-35, 55, 250);

            // configure light
            panel.Lights[0].Enabled = true;
            panel.Lights[0].Position = new ILPoint3Df(0, 0, 250);

            panel.BackgroundFilled = false;
            panel.BackColor = Color.White;
            panel.Axes.GridVisible = false;
            panel.Axes.LinesVisible = false;
            // configure X axis
            panel.Axes[0].LabeledTicks.Mode = TickMode.Manual;
            panel.Axes[0].LabeledTicks.Color = Color.Black;
            panel.Axes[0].LabeledTicks.Clear(); 

            panel.Axes[1].NearLines.Visible = false;
            panel.Axes[1].FarLines.Visible = false;
            panel.Axes[1].Label.Color = Color.Black;

            panel.Axes[2].NearLines.Visible = false;
            panel.Axes[2].FarLines.Visible = false;
            panel.Axes[2].Grid.Visible = true;
            panel.Axes[2].Grid.Color = Color.DarkGray;
            panel.Axes[2].Grid.Antialiasing = true;

            panel.Axes[2].Label.Color = Color.Black;

            panel.Axes[2].LabeledTicks.Color = Color.Black;
            panel.Axes[0].NearLines.Visible = false;
            panel.Axes[0].FarLines.Visible = false;
            panel.Axes[0].Label.Color = Color.Black;

            // configure Y axis
            panel.Axes[1].LabeledTicks.Mode = TickMode.Manual;
            panel.Axes[1].LabeledTicks.Color = Color.Black;
        }

        #endregion
    }
}