#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2010 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.Collections.Generic;
using System.ComponentModel;
using System.IO;
using System.Linq;
using System.Windows.Forms;
using HeuristicLab.Common;
using HeuristicLab.Core.Views;
using HeuristicLab.MainForm;
using HeuristicLab.MainForm.WindowsForms;
using HeuristicLab.Optimization;
using HeuristicLab.Persistence.Default.Xml;
using HeuristicLab.PluginInfrastructure;

namespace HeuristicLab.Clients.OKB {
  [View("ProblemData View")]
  [Content(typeof(ProblemData), true)]
  public partial class ProblemDataView : AsynchronousContentView {
    private List<DataType> dataTypeComboBoxValues;

    private long problemId;
    public long ProblemId {
      get { return problemId; }
      set {
        problemId = value;
        if (Content != null) {
          Content.ProblemId = value;
          SetEnabledStateOfControls();
        }
      }
    }

    public new ProblemData Content {
      get { return (ProblemData)base.Content; }
      set { base.Content = value; }
    }

    public ProblemDataView() {
      InitializeComponent();
    }

    protected override void OnInitialized(System.EventArgs e) {
      base.OnInitialized(e);
      dataTypeComboBoxValues = OKBClient.Instance.DataTypes.ToList();
      dataTypeComboBox.DataSource = dataTypeComboBoxValues;
      dataTypeComboBox.SelectedIndex = -1;
    }

    protected override void DeregisterContentEvents() {
      Content.PropertyChanged -= new PropertyChangedEventHandler(Content_PropertyChanged);
      base.DeregisterContentEvents();
    }
    protected override void RegisterContentEvents() {
      base.RegisterContentEvents();
      Content.PropertyChanged += new PropertyChangedEventHandler(Content_PropertyChanged);
    }

    protected override void OnContentChanged() {
      base.OnContentChanged();
      if (Content == null) {
        dataTypeComboBox.SelectedIndex = -1;
        viewHost.Content = null;
        noViewAvailableLabel.Visible = false;
      } else {
        dataTypeComboBox.SelectedItem = dataTypeComboBoxValues.FirstOrDefault(d => d.Id == Content.DataTypeId);

        using (MemoryStream stream = new MemoryStream(Content.Data)) {
          try {
            viewHost.Content = XmlParser.Deserialize<IContent>(stream);
            noViewAvailableLabel.Visible = false;
          }
          catch (Exception) {
            viewHost.Content = null;
            noViewAvailableLabel.Visible = true;
          }
          stream.Close();
        }
      }
      fileTextBox.Text = "-";
    }

    protected override void SetEnabledStateOfControls() {
      base.SetEnabledStateOfControls();
      newDataButton.Enabled = !ReadOnly;
      openFileButton.Enabled = !ReadOnly;
      saveFileButton.Enabled = (Content != null) && (((Content.Data != null) && (Content.Data.Length != 0)) || (viewHost.Content != null));
      storeDataButton.Enabled = saveFileButton.Enabled && (Content.ProblemId != 0) && !ReadOnly;
      dataTypeComboBox.Enabled = Content != null && viewHost.Content == null && !ReadOnly;
      fileTextBox.Enabled = Content != null;
      groupBox.Enabled = Content != null;
    }

    private void Content_PropertyChanged(object sender, PropertyChangedEventArgs e) {
      switch (e.PropertyName) {
        case "DataTypeId":
          dataTypeComboBox.SelectedItem = dataTypeComboBoxValues.FirstOrDefault(d => d.Id == Content.DataTypeId);
          break;
      }
    }

    private void refreshDataButton_Click(object sender, EventArgs e) {
      BeginAsyncCall();
      var call = new Action(delegate() {
        ProblemData data = OKBClient.Instance.GetProblemData(ProblemId);
        Content = data;
      });
      call.BeginInvoke(delegate(IAsyncResult result) {
        call.EndInvoke(result);
        EndAsyncCall();
      }, null);
    }
    private void storeDataButton_Click(object sender, EventArgs e) {
      if (viewHost.Content != null) {
        try {
          using (MemoryStream stream = new MemoryStream()) {
            IProblem problem = viewHost.Content as IProblem;
            XmlGenerator.Serialize(problem, stream);
            stream.Close();
            Content.Data = stream.ToArray();
          }
        }
        catch (Exception ex) {
          ErrorHandling.ShowErrorDialog(this, ex);
        }
      }
      OKBClient.Instance.UpdateProblemData(Content);
    }
    private void newDataButton_Click(object sender, EventArgs e) {
      using (TypeSelectorDialog dialog = new TypeSelectorDialog()) {
        dialog.Caption = "Select Problem";
        dialog.TypeSelector.Caption = "Available Problems";
        dialog.TypeSelector.Configure(typeof(IProblem), false, true);
        if (dialog.ShowDialog(this) == DialogResult.OK) {
          try {
            if (Content == null) Content = new ProblemData { ProblemId = ProblemId };
            viewHost.Content = (IContent)dialog.TypeSelector.CreateInstanceOfSelectedType();
            DataType dataType = OKBClient.Instance.ConvertToDataType(viewHost.Content.GetType());
            dataTypeComboBoxValues = OKBClient.Instance.DataTypes.OrderBy(d => d.Name).ToList();
            dataTypeComboBox.DataSource = dataTypeComboBoxValues;
            dataTypeComboBox.SelectedItem = dataType;
            fileTextBox.Text = "-";
            noViewAvailableLabel.Visible = false;
            SetEnabledStateOfControls();
          }
          catch (Exception ex) {
            ErrorHandling.ShowErrorDialog(this, ex);
          }
        }
      }
    }
    private void openFileButton_Click(object sender, EventArgs e) {
      if (openFileDialog.ShowDialog(this) == DialogResult.OK) {
        try {
          if (Content == null) Content = new ProblemData { ProblemId = ProblemId };
          IProblem problem = null;
          try {
            problem = XmlParser.Deserialize<IProblem>(openFileDialog.FileName);
          }
          catch (Exception) { }

          if (problem != null) {
            viewHost.Content = problem;
            noViewAvailableLabel.Visible = false;
            DataType dataType = OKBClient.Instance.ConvertToDataType(viewHost.Content.GetType());
            dataTypeComboBoxValues = OKBClient.Instance.DataTypes.OrderBy(d => d.Name).ToList();
            dataTypeComboBox.DataSource = dataTypeComboBoxValues;
            dataTypeComboBox.SelectedItem = dataType;
          } else {
            viewHost.Content = null;
            noViewAvailableLabel.Visible = true;
            using (FileStream stream = new FileStream(openFileDialog.FileName, FileMode.Open, FileAccess.Read)) {
              byte[] bytes = new byte[stream.Length];
              stream.Read(bytes, 0, bytes.Length);
              stream.Close();
              Content.Data = bytes;
            }
          }
          fileTextBox.Text = openFileDialog.FileName;
          SetEnabledStateOfControls();
        }
        catch (Exception ex) {
          ErrorHandling.ShowErrorDialog(this, ex);
        }
      }
    }
    private void saveFileButton_Click(object sender, EventArgs e) {
      if (saveFileDialog.ShowDialog(this) == DialogResult.OK) {
        try {
          if (viewHost.Content != null) {
            XmlGenerator.Serialize(viewHost.Content, saveFileDialog.FileName);
          } else {
            using (FileStream stream = new FileStream(saveFileDialog.FileName, FileMode.Create, FileAccess.Write)) {
              stream.Write(Content.Data, 0, Content.Data.Length);
              stream.Close();
            }
          }
          fileTextBox.Text = saveFileDialog.FileName;
        }
        catch (Exception ex) {
          ErrorHandling.ShowErrorDialog(this, ex);
        }
      }
    }
    private void dataTypeComboBox_SelectedIndexChanged(object sender, EventArgs e) {
      if (Content != null) Content.DataTypeId = ((DataType)dataTypeComboBox.SelectedItem).Id;
    }

    private void BeginAsyncCall() {
      if (InvokeRequired)
        Invoke(new Action(BeginAsyncCall));
      else {
        Cursor = Cursors.AppStarting;
        Enabled = false;
      }
    }
    private void EndAsyncCall() {
      if (InvokeRequired)
        Invoke(new Action(EndAsyncCall));
      else {
        Cursor = Cursors.Default;
        Enabled = true;
      }
    }
  }
}