using System;
using System.Collections.Generic;
using System.Drawing;
using System.Globalization;
using System.IO;
using System.Windows.Forms;
using Nikse.SubtitleEdit.Logic;

namespace Nikse.SubtitleEdit.Forms
{
    public sealed partial class ChooseLanguage : Form
    {
        public class CultureListItem
        {
            CultureInfo _cultureInfo;

            public CultureListItem(CultureInfo cultureInfo)
            {
                _cultureInfo = cultureInfo;
            }

            public override string ToString()
            {
                return _cultureInfo.NativeName;
            }

            public string Name
            {
                get { return _cultureInfo.Name; }
            }
        }

        public string CultureName
        {
            get
            {
                int index = comboBoxLanguages.SelectedIndex;
                if (index == -1)
                    return "en-US";
                else
                    return (comboBoxLanguages.Items[index] as CultureListItem).Name;
            }
        }

        public ChooseLanguage()
        {
            InitializeComponent();

            List<string> list = new List<string>();
            if (Directory.Exists(Path.Combine(Configuration.BaseDirectory, "Languages")))
            {
                foreach (string fileName in Directory.GetFiles(Path.Combine(Configuration.BaseDirectory, "Languages"), "*.xml"))
                {
                    string cultureName = Path.GetFileNameWithoutExtension(fileName);
                    list.Add(cultureName);
                }
            }
            list.Sort();
            comboBoxLanguages.Items.Add(new CultureListItem(CultureInfo.CreateSpecificCulture("en-US")));
            foreach (string cultureName in list)
            {
                try
                {
                    if (string.Compare(cultureName, "zh-CHS", true) == 0)
                        comboBoxLanguages.Items.Add(new CultureListItem(new CultureInfo(0x4)));
                    else if (string.Compare(cultureName, "zh-CHT", true) == 0)
                        comboBoxLanguages.Items.Add(new CultureListItem(new CultureInfo(0x7C04)));
                    else
                        comboBoxLanguages.Items.Add(new CultureListItem(CultureInfo.CreateSpecificCulture(cultureName)));
                }
                catch (ArgumentException)
                {
                    System.Diagnostics.Debug.WriteLine(cultureName + " is not a valid culture");
                }
            }

            int index = 0;
            for (int i=0; i< comboBoxLanguages.Items.Count; i++)
            {
                var item = (CultureListItem)comboBoxLanguages.Items[i];
                if (item.Name == Configuration.Settings.Language.General.CultureName)
                    index = i;
            }
            comboBoxLanguages.SelectedIndex = index;

            Text = Configuration.Settings.Language.ChooseLanguage.Title;
            labelLanguage.Text = Configuration.Settings.Language.ChooseLanguage.Language;
            buttonOK.Text = Configuration.Settings.Language.General.OK;
            buttonCancel.Text = Configuration.Settings.Language.General.Cancel;
            FixLargeFonts();
        }

        private void FixLargeFonts()
        {
            Graphics graphics = this.CreateGraphics();
            SizeF textSize = graphics.MeasureString(buttonOK.Text, this.Font);
            if (textSize.Height > buttonOK.Height - 4)
            {
                int newButtonHeight = (int)(textSize.Height + 7 + 0.5);
                Utilities.SetButtonHeight(this, newButtonHeight, 1);
            }
        }

        private void ChangeLanguage_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Escape)
                DialogResult = DialogResult.Cancel;
            else if (e.Shift && e.Control && e.Alt && e.KeyCode == Keys.L)
                Configuration.Settings.Language.Save();
        }

    }
}