#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.Linq;
using System.Windows.Forms;
using HeuristicLab.MainForm;
using HeuristicLab.MainForm.WindowsForms;

namespace HeuristicLab.Clients.OKB {
  [View("Problem View")]
  [Content(typeof(Problem), true)]
  public partial class ProblemView : NamedOKBItemView {
    private List<Platform> platformComboBoxValues;
    private List<ProblemClass> problemClassComboBoxValues;

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

    public ProblemView() {
      InitializeComponent();
    }

    protected override void OnInitialized(System.EventArgs e) {
      base.OnInitialized(e);
      platformComboBoxValues = OKBClient.Instance.Platforms.ToList();
      platformComboBox.DataSource = platformComboBoxValues;
      problemClassComboBoxValues = OKBClient.Instance.ProblemClasses.ToList();
      problemClassComboBox.DataSource = problemClassComboBoxValues;
    }

    protected override void OnContentChanged() {
      base.OnContentChanged();
      if (Content == null) {
        platformComboBox.SelectedIndex = -1;
        problemClassComboBox.SelectedIndex = -1;
        problemDataView.ProblemId = 0;
      } else {
        platformComboBox.SelectedItem = platformComboBoxValues.FirstOrDefault(p => p.Id == Content.PlatformId);
        problemClassComboBox.SelectedItem = problemClassComboBoxValues.FirstOrDefault(a => a.Id == Content.ProblemClassId);
        problemDataView.ProblemId = Content.Id;
      }
      usersListBox.DataSource = null;
      problemDataView.Content = null;
    }

    protected override void SetEnabledStateOfControls() {
      base.SetEnabledStateOfControls();
      platformComboBox.Enabled = (Content != null) && !ReadOnly;
      problemClassComboBox.Enabled = (Content != null) && !ReadOnly;
      refreshUsersButton.Enabled = Content != null;
      storeUsersButton.Enabled = (usersListBox.DataSource != null) && !ReadOnly;
      usersListBox.Enabled = (usersListBox.DataSource != null) && !ReadOnly;
      problemDataView.Enabled = Content != null;
    }

    protected override void OnContentPropertyChanged(string propertyName) {
      switch (propertyName) {
        case "Id":
          problemDataView.ProblemId = Content.Id;
          break;
        case "PlatformId":
          platformComboBox.SelectedItem = platformComboBoxValues.FirstOrDefault(p => p.Id == Content.PlatformId);
          break;
        case "ProblemClassId":
          problemClassComboBox.SelectedItem = problemClassComboBoxValues.FirstOrDefault(a => a.Id == Content.ProblemClassId);
          break;
      }
    }

    private void platformComboBox_SelectedValueChanged(object sender, System.EventArgs e) {
      if (Content != null) {
        Platform selected = platformComboBox.SelectedItem as Platform;
        if (selected != null) Content.PlatformId = selected.Id;
      }
    }
    private void problemClassComboBox_SelectedValueChanged(object sender, System.EventArgs e) {
      if (Content != null) {
        ProblemClass selected = problemClassComboBox.SelectedItem as ProblemClass;
        if (selected != null) Content.ProblemClassId = selected.Id;
      }
    }

    private void refreshUsersButton_Click(object sender, System.EventArgs e) {
      Guid[] ids = OKBClient.Instance.GetProblemUsers(Content.Id);
      if (ids != null) {
        List<User> users = OKBClient.Instance.Users.ToList();
        usersListBox.DataSource = users;
        usersListBox.DisplayMember = "Name";
        usersListBox.SelectedItems.Clear();
        foreach (Guid id in ids)
          usersListBox.SelectedItems.Add(users.First(u => u.Id == id));
        usersListBox.Enabled = !ReadOnly;
        storeUsersButton.Enabled = false;
      }
    }
    private void storeUsersButton_Click(object sender, System.EventArgs e) {
      if (OKBClient.Instance.UpdateProblemUsers(Content.Id, usersListBox.SelectedItems.Cast<User>().Select(u => u.Id).ToArray()))
        storeUsersButton.Enabled = false;
    }
    private void usersListBox_SelectedIndexChanged(object sender, EventArgs e) {
      storeUsersButton.Enabled = !ReadOnly;
    }
  }
}