#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2012 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.Linq;
using System.Windows.Forms;
using HeuristicLab.Core.Views;
using HeuristicLab.MainForm;
using HeuristicLab.PluginInfrastructure;

namespace HeuristicLab.Encodings.ParameterConfigurationEncoding.Views {
  /// <summary>
  /// The visual representation of a <see cref="ConstrainedValue"/>.
  /// </summary>
  [View("Value View")]
  [Content(typeof(ConstrainedValue), true)]
  public partial class ValueView : ItemView {
    /// <summary>
    /// Gets or sets the variable to represent visually.
    /// </summary>
    public new ConstrainedValue Content {
      get { return (ConstrainedValue)base.Content; }
      set { base.Content = value; }
    }

    public ValueView() {
      InitializeComponent();
    }

    protected override void OnContentChanged() {
      base.OnContentChanged();
      if (Content != null) {
        valueViewHost.Content = Content.Value;
      } else {
        valueViewHost.Content = null;
      }
      SetEnabledStateOfControls();
    }

    protected override void SetEnabledStateOfControls() {
      base.SetEnabledStateOfControls();
      if (Content != null) {
        clearValueButton.Enabled = Content.Value != null && Content.IsNullable; // in this case IsNullable is not set correctly
        setValueButton.Enabled = Content.ValueDataType != null;
      }
    }

    private void setValueButton_Click(object sender, EventArgs e) {
      var withoutNullValue = Content.ValidValues.Where(x => x != null && !(x is NullValue));
      var typeSelectorDialog = new TypeSelectorDialog();
      typeSelectorDialog.Caption = "Select Item";
      typeSelectorDialog.TypeSelector.Caption = "Available Items";
      typeSelectorDialog.TypeSelector.Configure(withoutNullValue.Select(x => x.GetType()), false, false, false);
      if (typeSelectorDialog.ShowDialog(this) == DialogResult.OK) {
        try {
          Content.Value = withoutNullValue.Single(x => x.GetType() == typeSelectorDialog.TypeSelector.SelectedType);
          valueViewHost.Content = Content.Value;
        }
        catch (Exception ex) {
          ErrorHandling.ShowErrorDialog(this, ex);
        }
      }
      SetEnabledStateOfControls();
    }

    private void clearValueButton_Click(object sender, EventArgs e) {
      Content.Value = null;
      valueViewHost.Content = null;
      SetEnabledStateOfControls();
    }
  }
}