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using System;
using System.Drawing;
using System.Linq;
using System.Windows.Forms;

// Migrating from Azure translation API version 2 to 3
// http://www.cyotek.com/blog/migrating-from-azure-translation-api-version-2-to-3

// Translating text with Azure cognitive services
// http://www.cyotek.com/blog/translating-text-with-azure-cognitive-services

// This work is licensed under the Creative Commons Attribution 4.0 International License.
// To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

// Found this example useful? 
// https://www.paypal.me/cyotek

namespace Cyotek.Demo.AzureTranslation
{
  public partial class MainForm : Form
  {
    #region Fields

    private string[] _languages;

    private TranslationClient _translationClient;

    private TranslationClientV2 _translationClientV2;

    #endregion

    #region Constructors

    public MainForm()
    {
      this.InitializeComponent();
    }

    #endregion

    #region Methods

    protected override void OnLoad(EventArgs e)
    {
      base.OnLoad(e);

      if (!this.DesignMode)
      {
        this.Font = SystemFonts.DialogFont;
      }

      this.Text = Application.ProductName;
    }

    protected override void OnShown(EventArgs e)
    {
      base.OnShown(e);

      _translationClient = new TranslationClient(apiKeyTextBox.Text);
      _translationClientV2 = new TranslationClientV2(apiKeyTextBox.Text);

      localComboBox.Text = "de";
      fromComboBox.Text = "en";
      toComboBox.Text = "de";

      _languages = new[] { "en", "fr", "de" };
    }

    private void aboutToolStripMenuItem_Click(object sender, EventArgs e)
    {
      using (AboutDialog dialog = new AboutDialog())
      {
        dialog.ShowDialog();
      }
    }

    private void apiKeyTextBox_TextChanged(object sender, EventArgs e)
    {
      _translationClient.AuthorizationKey = apiKeyTextBox.Text;
      _translationClientV2.AuthorizationKey = apiKeyTextBox.Text;
    }

    private void exitToolStripMenuItem_Click(object sender, EventArgs e)
    {
      this.Close();
    }

    private void FillItems(ListBox control, string[] items)
    {
      ListBox.ObjectCollection listItems;

      control.BeginUpdate();

      listItems = control.Items;
      listItems.Clear();

      foreach (string item in items.OrderBy(item => item))
      {
        listItems.Add(item);
      }

      control.EndUpdate();
    }

    private void FillItems(TextBox control, string[] items)
    {
      control.Text = string.Join(Environment.NewLine, items.OrderBy(item => item));
    }

    private void FillItems(ComboBox control, string[] items)
    {
      ComboBox.ObjectCollection listItems;

      control.BeginUpdate();

      listItems = control.Items;
      listItems.Clear();

      foreach (string item in items.OrderBy(item => item))
      {
        listItems.Add(item);
      }

      control.EndUpdate();
    }

    private void getLanguageNamesButton_Click(object sender, EventArgs e)
    {
      this.WrapRequest(() =>
                       {
                         string[] names;

                         // ReSharper disable once ConvertIfStatementToConditionalTernaryExpression
                         if (v3RadioButton.Checked)
                         {
                           names = _translationClient.GetLocalizedLanguageNames(localComboBox.Text, _languages);
                         }
                         else
                         {
                           names = _translationClientV2.GetLocalizedLanguageNames(localComboBox.Text, _languages);
                         }

                         this.FillItems(namesListBox, names);
                       });
    }

    private void getLanguagesButton_Click(object sender, EventArgs e)
    {
      this.WrapRequest(() =>
                       {
                         // ReSharper disable once ConvertIfStatementToConditionalTernaryExpression
                         if (v3RadioButton.Checked)
                         {
                           _languages = _translationClient.GetLanguages();
                         }
                         else
                         {
                           _languages = _translationClientV2.GetLanguages();
                         }

                         this.FillItems(languageListBox, _languages);
                         this.FillItems(localComboBox, _languages);
                         this.FillItems(fromComboBox, _languages);
                         this.FillItems(toComboBox, _languages);

                         languageCountLabel.Text = _languages.Length.ToString();
                       });
    }

    private void swapButton_Click(object sender, EventArgs e)
    {
      string temp;

      temp = fromComboBox.Text;
      fromComboBox.Text = toComboBox.Text;
      toComboBox.Text = temp;

      temp = sourceTextBox.Text;
      sourceTextBox.Text = translatedTextBox.Text;
      translatedTextBox.Text = temp;
    }

    private void translateButton_Click(object sender, EventArgs e)
    {
      this.WrapRequest(() =>
                       {
                         // ReSharper disable once ConvertIfStatementToConditionalTernaryExpression
                         if (v3RadioButton.Checked)
                         {
                           translatedTextBox.Text = _translationClient.Translate(sourceTextBox.Text, fromComboBox.Text, toComboBox.Text);
                         }
                         else
                         {
                           translatedTextBox.Text = _translationClientV2.Translate(sourceTextBox.Text, fromComboBox.Text, toComboBox.Text);
                         }
                       });
    }

    private void v3RadioButton_CheckedChanged(object sender, EventArgs e)
    {
      _languages = null;

      languageListBox.Text = string.Empty;
      namesListBox.Text = string.Empty;
      translatedTextBox.Text = string.Empty;
    }

    private void WrapRequest(Action action)
    {
      this.UseWaitCursor = true;
      Cursor.Current = Cursors.WaitCursor;

      try
      {
        action();
      }
      catch (Exception ex)
      {
        MessageBox.Show(ex.GetBaseException().Message, this.Text, MessageBoxButtons.OK, MessageBoxIcon.Error);
      }

      Cursor.Current = Cursors.Default;
      this.UseWaitCursor = false;
    }

    #endregion
  }
}