using System;
using System.Linq;
using System.Windows.Forms;
using HeuristicLab.Core;
using HeuristicLab.Core.Views;
using HeuristicLab.Encodings.ParameterConfigurationEncoding;
using HeuristicLab.MainForm;
using HeuristicLab.PluginInfrastructure;

namespace HeuristicLab.Problems.MetaOptimization.Views {
  [View("ValueConfigurationList View")]
  [Content(typeof(ICheckedValueConfigurationList), IsDefaultView = true)]
  public sealed partial class ValueConfigurationCheckedItemCollectionView : CheckedItemListView<IValueConfiguration> {
    public new ICheckedValueConfigurationList Content {
      get { return (ICheckedValueConfigurationList)base.Content; }
      set { base.Content = value; }
    }

    public ValueConfigurationCheckedItemCollectionView() {
      InitializeComponent();
      this.viewHost.ViewsLabelVisible = false;
      this.typeSelectorDialog = new TypeSelectorDialog();
    }

    #region Event Handlers (Content)
    #endregion

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

    protected override void SetEnabledStateOfControls() {
      base.SetEnabledStateOfControls();
      if (Content != null) this.removeButton.Enabled = Content.Count > Content.MinItemCount;
    }

    #region Event Handlers (child controls)
    protected override void itemsListView_SelectedIndexChanged(object sender, EventArgs e) {
      base.itemsListView_SelectedIndexChanged(sender, e);
      this.removeButton.Enabled = removeButton.Enabled && (Content.Count > Content.MinItemCount);
    }
    #endregion

    protected override IValueConfiguration CreateItem() {
      typeSelectorDialog.Caption = "Select Item";
      typeSelectorDialog.TypeSelector.Caption = "Available Items";
      typeSelectorDialog.TypeSelector.Configure(Content.ValidValues.Select(x => x.GetType()), false, false, false);
      if (typeSelectorDialog.ShowDialog(this) == DialogResult.OK) {
        try {
          IItem value = (IItem)Content.ValidValues.Single(x => x.GetType() == typeSelectorDialog.TypeSelector.SelectedType).Clone();
          if (value is NullValue) {
            return new NullValueConfiguration();
          } else if (value is IParameterizedItem) {
            return new ParameterizedValueConfiguration(value, value.GetType(), true);
          } else {
            return new RangeValueConfiguration(value, value.GetType());
          }
        }
        catch (Exception ex) {
          ErrorHandling.ShowErrorDialog(this, ex);
        }
      }
      return null;
    }
  }
}