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

namespace HeuristicLab.Problems.MetaOptimization.Views {
  [View("Value View")]
  [Content(typeof(ConstrainedValue), true)]
  public partial class ValueView : ItemView {

    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; // IsNullable ist in diesem fall nicht richtig gesetzt
        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 objectSelectorDialog = new ObjectSelectorDialog<IItem>(withoutNullValue.GroupBy(x => ApplicationManager.Manager.GetDeclaringPlugin(x.GetType()).Name));
      if (objectSelectorDialog.ShowDialog(this) == DialogResult.OK) {
        try {
          Content.Value = objectSelectorDialog.Item;
          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();
    }
  }
}