#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2008 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab 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 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab 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 HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;
using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Data;
using HeuristicLab.Charting;
using HeuristicLab.Charting.Data;

namespace HeuristicLab.Logging {
  /// <summary>
  /// The visual representation of a <see cref="Linechart"/>.
  /// </summary>
  public partial class LinechartView : ViewBase {
    private double maxY = double.MinValue, minY = double.MaxValue;
    private static int[] colors = new int[] {
      182,182,255, 
      218,255,182,
      255,182,218, 
      182,255,255, 
      218,182,255, 
      255,182,255,
      255,182,182, 
      255,218,182, 
      255,255,182, 
      182,255,182, 
      182,255,218, 
      182,218,255
    };

    /// <summary>
    /// Gets or sets the Linechart object to represent visually.
    /// </summary>
    /// <remarks>Uses property <see cref="ViewBase.Item"/> of base class <see cref="ViewBase"/>.
    /// No own data storage present.</remarks>
    public Linechart Linechart {
      get { return (Linechart)base.Item; }
      set { base.Item = value; }
    }

    /// <summary>
    /// Initializes a new instance of <see cref="LinechartView"/>. 
    /// </summary>
    public LinechartView() {
      InitializeComponent();
      Caption = "Linechart View";
    }
    /// <summary>
    /// Initializes a new instance of <see cref="LinechartView"/> with the given <paramref name="linechart"/>.
    /// </summary>
    /// <param name="linechart">The linechart to represent visually.</param>
    public LinechartView(Linechart linechart)
      : this() {
      Linechart = linechart;
    }

    /// <summary>
    /// Removes the event handlers from the underlying <see cref="Linechart"/>.
    /// </summary>
    /// <remarks>Calls <see cref="ViewBase.RemoveItemEvents"/> of base class <see cref="ViewBase"/>.</remarks>
    protected override void RemoveItemEvents() {
      if(Linechart != null) {
        Linechart.Values.ItemAdded -= new EventHandler<EventArgs<IItem, int>>(Values_ItemAdded);
        Linechart.Values.ItemRemoved -= new EventHandler<EventArgs<IItem, int>>(Values_ItemRemoved);
      }
      base.RemoveItemEvents();
    }
    /// <summary>
    /// Adds event handlers to the underlying <see cref="Linechart"/>.
    /// </summary>
    /// <remarks>Calls <see cref="ViewBase.AddItemEvents"/> of base class <see cref="ViewBase"/>.</remarks>
    protected override void AddItemEvents() {
      base.AddItemEvents();
      if(Linechart != null) {
        Linechart.Values.ItemAdded += new EventHandler<EventArgs<IItem, int>>(Values_ItemAdded);
        Linechart.Values.ItemRemoved += new EventHandler<EventArgs<IItem, int>>(Values_ItemRemoved);
      }
    }

    /// <summary>
    /// Updates all controls with the latest data of the model.
    /// </summary>
    /// <remarks>Calls <see cref="ViewBase.UpdateControls"/> of base class <see cref="UpdateControls"/>.</remarks>
    protected override void UpdateControls() {
      base.UpdateControls();
      Datachart datachart = new Datachart(-50, -5000, 1000, 55000);
      datachart.Title = "Line Chart";
      dataChartControl.ScaleOnResize = false;
      dataChartControl.Chart = datachart;
      datachart.Group.Clear();
      datachart.Group.Add(new Axis(datachart, 0, 0, AxisType.Both));
      if(Linechart != null) {
        datachart.UpdateEnabled = false;
        for(int i = 0; i < Linechart.NumberOfLines; i++) {
          int colorIndex = (i % 12)*3;
          Color curCol = Color.FromArgb(colors[colorIndex],colors[colorIndex + 1], colors[colorIndex + 2]);
          Pen p = new Pen(curCol);
          SolidBrush b = new SolidBrush(curCol);
          datachart.AddDataRow(DataRowType.Lines, p, b);
        }

        for(int i = 0; i < Linechart.Values.Count; i++) {
          ItemList list = (ItemList)Linechart.Values[i];
          for(int j = 0; j < list.Count; j++) {
            double value = 0.0;
            if (list[j] is IntData) value = (double)((IntData)list[j]).Data;
            else value = ((DoubleData)list[j]).Data;
            if(!double.IsInfinity(value) && !double.IsNaN(value)) {
              if(value < minY) minY = value;
              if(value > maxY) maxY = value;
              datachart.AddDataPoint(j, i, value);
            }
          }
        }
        datachart.ZoomIn(-Linechart.Values.Count * 0.05, minY - (minY * 0.1), Linechart.Values.Count * 1.05, maxY * 1.05);
        datachart.UpdateEnabled = true;
        datachart.EnforceUpdate();
      }
    }

    #region Values Events
    private delegate void ItemIndexDelegate(object sender, EventArgs<IItem, int> e);
    private void Values_ItemRemoved(object sender, EventArgs<IItem, int> e) {
      if(InvokeRequired) {
        Invoke(new ItemIndexDelegate(Values_ItemRemoved), sender, e);
      } else {
        Datachart datachart = dataChartControl.Chart;
      }
    }
    private void Values_ItemAdded(object sender, EventArgs<IItem, int> e) {
      if(InvokeRequired) {
        Invoke(new ItemIndexDelegate(Values_ItemAdded), sender, e);
      } else {
        Datachart datachart = dataChartControl.Chart;
        ItemList list = (ItemList)e.Value;
        datachart.UpdateEnabled = false;
        for (int i = 0; i < list.Count; i++) {
          double value = 0.0;
          if (list[i] is IntData) value = (double)((IntData)list[i]).Data;
          else value = ((DoubleData)list[i]).Data;
          datachart.AddDataPoint(i, e.Value2, value);
          if (value < minY) minY = value;
          if (value > maxY) maxY = value;
        }
        datachart.ZoomIn(-Linechart.Values.Count * 0.05, minY - (minY * 0.1), Linechart.Values.Count * 1.05, maxY * 1.05);
        datachart.UpdateEnabled = true;
        datachart.EnforceUpdate();
      }
    }
    #endregion
  }
}