///
/// Copyright (c) 2013-2015 Sensus Metering Systems
///
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Globalization;
using TBF.Resources;

namespace TBF
{

	/// <summary>
    /// Dialog to edit local settings that specify UI preferences, language, etc. (S1.1)
    /// </summary>
    public partial class PreferencesDlg : Form
    {
		string[] LanguageName = new string[]
		{
			"English",
			"Česky （Czech)",
			"中国 (Chinese simplified)",
			"Deutch (German)",
			"Español (Spanish)",
			"Français (French)",
			"Italiano (Italian)",
			"Polski (Polish)",
			"Română (Romanian)",
			"Русский (Russion)",
			"Slovensky (Slovak)",
		};

		/// <summary>
		/// Available languages.
		/// Method ToString should give a supported culture info string:
		/// ("en","de","fr","es","it","cn", etc.).
		/// </summary>
		string[] LanguageCode = new string[]
		{
			"en",
			"cs",
			"zh-CN",
			"de",
			"es",
			"fr",
			"it",
			"pl",
			"ro",
			"ru",
			"sk",
		};

        // Local copy of 'local settings' initialized to Program.localSettings.
        // Dialog modifies this copy and updates Program.localSettings just
        // when 'OK' is pressed.
        LocalSettings localSettings;

        public PreferencesDlg()
        {
			Program.LocalSettings.Save();
			localSettings = LocalSettings.Load(Program.LocalSettingsFileName);
			if (localSettings == null) throw new Exception("Cannot load local settings");

            InitializeComponent();

            // Initialize the list box with langauges
            for (int i = 0; i < LanguageName.Length; i++)
            {
                languageListBox.Items.Add(LanguageName[i]);
				if (localSettings.Language == LanguageCode[i])
				{
					languageListBox.Text = LanguageName[i];
				}
            }
        }

		private void PreferencesDlg_Load(object sender, EventArgs e)
		{
			Text = Strings.Language;
			okButton.Text = Strings.OkBtnText;
			cancelButton.Text = Strings.CancelBtnText;
		}

        private void languageListBox_SelectedIndexChanged(object sender, EventArgs e)
        {
            localSettings.Language = LanguageCode[languageListBox.SelectedIndex];
        }

        /// <summary>
        /// Update setting, return DialogResult.OK
        /// </summary>
        /// <param name="sender">Not used</param>
        /// <param name="e">Not used</param>
        private void okButton_Click(object sender, EventArgs e)
        {
			try
			{
				string culture = localSettings.Language.Replace('_', '-');
				CultureInfo ci = new CultureInfo(culture);
				System.Threading.Thread.CurrentThread.CurrentUICulture = ci;

				localSettings.Save();
				Program.LocalSettings = LocalSettings.Load(Program.LocalSettingsFileName);

				DialogResult response = MessageBox.Show(Strings.Restart_To_Apply_Changes);

				DialogResult = DialogResult.OK;
				Close();
			}
			catch
			{
				MessageBox.Show("Selected language not supported.\nUsing English.", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
				localSettings.Language = "en";
				System.Threading.Thread.CurrentThread.CurrentUICulture =
					new System.Globalization.CultureInfo(localSettings.Language);
			}
            return;
        }

        /// <summary>
        /// Throw away changes, return DialogResult.Cancel
        /// </summary>
        /// <param name="sender">Not used</param>
        /// <param name="e">Not used</param>
        private void cancelButton_Click(object sender, EventArgs e)
        {
            DialogResult = DialogResult.Cancel;
            Close();
            return;
        }
    }
}