using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Controls;
using System.Windows;
using HeuristicLab.BackgroundProcessing;
using System.IO;
using HeuristicLab.Persistence.Default.Xml;
using HeuristicLab.Persistence.Core;
using HeuristicLab.PluginInfrastructure;

namespace HeuristicLab.OKB.Cockpit.Admin {

  public partial class OperatorGraphEditorHost : UserControl {

    public enum EditorType { Algorithm, Problem };

    private IOperatorGraphEditor activeEditor;
    private Dictionary<string, IOperatorGraphEditor> availableEditors;

    public OperatorGraphEditorHost() {
      InitializeComponent();
      availableEditors = ApplicationManager.Manager
        .GetInstances<IOperatorGraphEditor>()
        .ToDictionary(e => e.PlatformName, e => e);
    }

    public void LoadData(byte[] data, OKBAdmin.Platform platform, EditorType type) {
      availableEditors.TryGetValue(platform.Name, out activeEditor);
      if (activeEditor == null) {
        MessageBox.Show(
          String.Format("Unsupported platform '{0}'", platform.Name),
          typeof(OperatorGraphEditorHost).Name,
          MessageBoxButton.OK, MessageBoxImage.Error);
        return;
      }
      try {
        activeEditor.Load(data);
      } catch (Exception x) {
        MessageBox.Show(
          String.Format("Could not load {0} implementation:\n{1}", platform.Name, x.ToString()),
          typeof(OperatorGraphEditorHost).Name,
          MessageBoxButton.OK, MessageBoxImage.Error);
      }
      try {
        Dispatcher.Invoke(new Action(() => {
          if (type == EditorType.Algorithm) {
            FormsHost.Child = activeEditor.CreateAlgorithmControl();
          } else {
            FormsHost.Child = activeEditor.CreateProblemControl();
          }
        }));
      } catch (Exception x) {
        MessageBox.Show(
          String.Format("Could not instatiate operator graph editor:\n{1}", x.ToString()),
          typeof(OperatorGraphEditorHost).Name,
          MessageBoxButton.OK, MessageBoxImage.Error);
      }
    }

    public byte[] GetAlgorithmData() {
      return (byte[])Dispatcher.Invoke(new Func<System.Windows.Forms.Control, byte[]>(control => {
        if (activeEditor == null) return null;
        return activeEditor.GetAlgorithmData(control);
      }), FormsHost.Child);
    }

    public byte[] GetProblemData() {
      return (byte[])Dispatcher.Invoke(new Func<System.Windows.Forms.Control, byte[]>(control => {
        if (activeEditor == null) return null;
        return activeEditor.GetProblemData(control);
      }), FormsHost.Child);
    }
  }
}