using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Xml;
using Multilanguage_Application_XML.Properties;

namespace Multilanguage_Application_XML
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

            languageComboBox.Items.Add(new Language("LangPL", "polski"));
            languageComboBox.Items.Add(new Language("LangEN", "english"));
            languageComboBox.SelectedIndex = 0;
            languageComboBox.SelectedValueChanged += languageComboBox_SelectedValueChanged;
        }

        void languageComboBox_SelectedValueChanged(object sender, EventArgs e)
        {
            Language selectedLanguage = (Language)languageComboBox.SelectedItem;
            Settings.Default.App_Language = selectedLanguage.Name;
            UpdateLanguage(this);
        }

        static void UpdateLanguage(Form _form)
        {
            foreach (Control ctrl in _form.Controls)
            {
                UpdateLanguageControls(_form.Text, ctrl);
            }
        }

        static void UpdateLanguageControls(string _formName, Control _ctrl)
        {
            _ctrl.Text = XMLHelper.GetString(_formName + "_" + _ctrl.Name);
        }
    }

    static class XMLHelper
    {
        public static string GetString(string _str)
        {
            XmlTextReader reader = new XmlTextReader("LanguageFiles/" + Settings.Default.App_Language + ".xml");

            while (reader.Read())
            {
                if (reader.Name == _str)
                {
                    reader.Read();
                    return reader.Value;
                }
            }

            return "String \"" + _str + "\" not found!";
        }
    }

    class Language
    {
        public string Name { get; set; }
        public string ShowableName { get; set; }

        public Language(string _Name, string _ShowableName)
        {
            Name = _Name;
            ShowableName = _ShowableName;
        }

        public override string ToString()
        {
            return ShowableName;
        }
    }
}