using System;
using System.Drawing;
using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Data;
using HeuristicLab.Optimization;
using HeuristicLab.Parameters;
using HEAL.Attic;

namespace HeuristicLab.Analysis.FitnessLandscape.BoxCharts {

  [StorableType("E04F26F6-E8CF-4EF1-96AC-B3FFF38E4ACE")]
  public class StringValueBoxChartElementGenerator : EmptyBoxChartElementGenerator {

    public ValueParameter<StringValue> ValueNameParameter {
      get { return (ValueParameter<StringValue>)Parameters["ValueName"]; }
    }
    public ValueParameter<IntValue> FontSizeParameter {
      get { return (ValueParameter<IntValue>) Parameters["FontSize"]; }
    }

    protected string ValueName { get { return ValueNameParameter.Value.Value; } }
    protected int FontSize { get { return FontSizeParameter.Value.Value; }}

    #region Construction & Cloning

    [StorableConstructor]
    protected StringValueBoxChartElementGenerator(StorableConstructorFlag _) : base(_) { }
    protected StringValueBoxChartElementGenerator(StringValueBoxChartElementGenerator original, Cloner cloner) : base(original, cloner) {
      RegisterEvents();
    }
    public StringValueBoxChartElementGenerator() {
      Parameters.Add(new ValueParameter<StringValue>("ValueName", "The name of the result of parameter ot be visualized.", new StringValue("Value")));
      Parameters.Add(new ValueParameter<IntValue>("FontSize", "The font size to be used for the text.", new IntValue(11)));
      RegisterEvents();
      if (GetType() == typeof(StringValueBoxChartElementGenerator))
        UpdateName();
    }
    public override IDeepCloneable Clone(Cloner cloner) {
      return new StringValueBoxChartElementGenerator(this, cloner);
    }
    [StorableHook(HookType.AfterDeserialization)]
    private void AfterDeserialization() {
      RegisterEvents();
    }
    #endregion

    private void RegisterEvents() {
      ValueNameParameter.ToStringChanged += new EventHandler(Parameters_Changed);
      FontSizeParameter.ToStringChanged += new EventHandler(Parameters_Changed);
    }

    private void Parameters_Changed(object sender, EventArgs eventArgs) {
      UpdateName();
    }

    protected override string CalculateName() {
      return string.Format("{0} str {1}", base.CalculateName(), ValueName);
    }

    private string GetValue(IRun run) {
      IItem value;
      run.Results.TryGetValue(ValueName, out value);
      if (value != null)
        return value.ToString();
      run.Parameters.TryGetValue(ValueName, out value);
      if (value != null)
        return value.ToString();
      return "";
    }

    public override void Draw(IRun run, Graphics g) {
      var value = GetValue(run);
      using(var font = new Font("Helvetica", FontSize)) {
        var size = g.MeasureString(value, font);
        g.DrawString(value, font, Brushes.Black,
          g.ClipBounds.Left+(g.ClipBounds.Width - size.Width)/2,
          g.ClipBounds.Top+(g.ClipBounds.Height - size.Height)/2);
      }
    }
  }
}