using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using Microsoft.Win32;
using Newtonsoft.Json;
using DotNetSpeech;

namespace Translate
{
    public partial class MainForm : Form
    {
        #region Fields

        /// <summary>
        /// HotKey
        /// </summary>
        private HotKeyClass _regisKey = new HotKeyClass();

        /// <summary>
        /// spFlags
        /// </summary>
        private SpeechVoiceSpeakFlags spFlags = SpeechVoiceSpeakFlags.SVSFlagsAsync;

        /// <summary>
        /// sp
        /// </summary>
        private SpVoice sp = new SpVoice();

        /// <summary>
        /// notifyicon
        /// </summary>
        private NotifyIcon notifyicon = new NotifyIcon();
        
        /// <summary>
        /// Icon
        /// </summary>
        private Icon ico = Properties.Resources.translate;
        
        /// <summary>
        /// notifyContextMenu
        /// </summary>
        private ContextMenu notifyContextMenu = new ContextMenu();

        /// <summary>
        /// isExit
        /// </summary>
        private bool isExit = false;

        /// <summary>
        /// request
        /// </summary>
        private TranslateRequest request;

        /// <summary>
        /// isRequest
        /// </summary>
        private bool isRequest = false;

        #endregion

        #region Constructor

        public MainForm(string[] args)
        {
            InitializeComponent();            
            cmbSource.DisplayMember = "LanguageName";
            cmbSource.ValueMember = "LanguageKey";
            cmbTarge.DisplayMember = "LanguageName";
            cmbTarge.ValueMember = "LanguageKey";
            cmbSource.DataSource = GetLanguageList();
            cmbTarge.DataSource = GetLanguageList();
            cmbSource.SelectedValue = "en";
            cmbTarge.SelectedValue = "zh-CN";
            chkAuto_CheckedChanged(null, null);

            translatorNotifyIcon.Icon = ico;
            this.ShowInTaskbar = false;
            notifyicon.Visible = true;
            this.Hide();

            if (args.Length > 0 && args[0]=="ONSTART")
            {
                WindowState = FormWindowState.Minimized;
            }
        }        

        #endregion

        #region Methods

        /// <summary>
        /// btnSubmit_Click
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnSubmit_Click(object sender, EventArgs e)
        {
            StartTranslate();
        }

        /// <summary>
        /// StartTranslate
        /// </summary>
        private void StartTranslate()
        {
            string source = txtSource.Text;
            string languageSource = cmbSource.SelectedValue.ToString();
            string languageTarge = cmbTarge.SelectedValue.ToString();
            txtResult.Clear();
            if (!string.IsNullOrEmpty(source))
            {
                txtResult.Text = "Translation...";

                if (IsChinese(source))
                {
                    string oldSource = string.Empty;
                    if (languageSource != "zh-CN")
                    {
                        oldSource = cmbSource.SelectedValue.ToString();
                        cmbSource.SelectedValue = "zh-CN";
                        languageSource = "zh-CN";
                    }
                    if (languageTarge == "zh-CN")
                    {
                        if (string.IsNullOrEmpty(oldSource))
                        {
                            cmbTarge.SelectedValue = "en";
                        }
                        else
                        {
                            cmbTarge.SelectedValue = oldSource;
                        }
                        languageTarge = cmbTarge.SelectedValue.ToString();
                    }
                }


                request = new TranslateRequest(source, languageSource, languageTarge);
                if (!isRequest)
                {
                    TranslateExecute(request.Text, request.Source, request.Targe);
                }
            }
        }

        /// <summary>
        /// TranslateExecute
        /// </summary>
        private void TranslateExecute(string source, string languageSource, string languageTarge)
        {
            Action action = new Action(() =>
            {
                string result = GoogleTranslate.Execute(source, languageSource, languageTarge);
                SetResultText(result);
                isRequest = false;
                if (request != null)
                {
                    TranslateExecute(request.Text, request.Source, request.Targe);
                }
            });
            request = null;
            isRequest = true;
            action.BeginInvoke(null, null);
        }

        /// <summary>
        /// IsChinese
        /// </summary>
        /// <param name="CString"></param>
        /// <returns></returns>
        public bool IsChinese(string CString)
        {
            bool BoolValue = false;
            for (int i = 0; i < CString.Length; i++)
            {
                if (Convert.ToInt32(Convert.ToChar(CString.Substring(i, 1))) < Convert.ToInt32(Convert.ToChar(128)))
                {
                    BoolValue = false;
                }
                else
                {
                    return BoolValue = true;
                }
            }
            return BoolValue;
        }

        /// <summary>
        /// SetResultText
        /// </summary>
        /// <param name="value"></param>
        private void SetResultText(string value)
        {
            this.BeginInvoke(new Action(() =>
            {
                txtResult.Text = value;
            }), null);
        }        

        /// <summary>
        /// rdAuto_CheckedChanged
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void chkAuto_CheckedChanged(object sender, EventArgs e)
        {
            if (chkAuto.Checked)
            {
                txtSource.TextChanged += txtSource_TextChanged;
            }
            else
            {
                txtSource.TextChanged -= txtSource_TextChanged;
            }
        }

        /// <summary>
        /// txtSource_TextChanged
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void txtSource_TextChanged(object sender, EventArgs e)
        {
            StartTranslate();
        }

        /// <summary>
        /// translatorNotifyIcon_DoubleClick
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void translatorNotifyIcon_DoubleClick(object sender, EventArgs e)
        {
            if (WindowState == FormWindowState.Minimized)
            {
                this.Show();
                WindowState = FormWindowState.Normal;
                this.Activate();
            }
            else
            {
                WindowState = FormWindowState.Minimized;
                this.Hide();
            }
        }

        /// <summary>
        /// MainForm_SizeChanged
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void MainForm_SizeChanged(object sender, EventArgs e)
        {
            if (WindowState == FormWindowState.Minimized)
            {
                this.Hide();
            }
        }

        /// <summary>
        /// GetLanguageList
        /// </summary>
        /// <returns></returns>
        private List<Language> GetLanguageList()
        {
            Hashtable array = new Hashtable();
            array.Add ("en", "English");
            array.Add ("zh-CN", "Chinese");
            #region Hashtable
            array.Add ("sq", "Albanian");
            array.Add ("ar", "Arabic");
            array.Add ("ga", "Irish");
            array.Add ("et", "Estonian");
            array.Add ("be", "Belarusian");
            array.Add ("bg", "Bulgarian");
            array.Add ("is", "Icelandic");
            array.Add ("pl", "Polish");
            array.Add ("fa", "Persian");
            array.Add ("af", "Boolean text (Afrikaans)");
            array.Add ("da", "Danish");
            array.Add ("de", "German");
            array.Add ("ru", "Russian");
            array.Add ("fr", "French");
            array.Add ("tl", "Filipino");
            array.Add ("fi", "Finnish");
            array.Add ("ko", "Korean");
            array.Add ("nl", "Dutch");
            array.Add ("gl", "Galician");
            array.Add ("ca", "Catalan");
            array.Add ("cs", "Czech");
            array.Add ("hr", "Croatian");
            array.Add ("lv", "Latvian");
            array.Add ("lt", "Lithuanian");
            array.Add ("ro", "Romanian");
            array.Add ("mt", "Maltese");
            array.Add ("ms", "Malay");
            array.Add ("mk", "Macedonian");
            array.Add ("no", "Norwegian");
            array.Add ("pt", "Portuguese");
            array.Add ("ja", "Japanese");
            array.Add ("sv", "Swedish");
            array.Add ("sr", "Serbian");
            array.Add ("sk", "Slovak");
            array.Add ("sl", "Slovenian");
            array.Add ("sw", "Swahili");
            array.Add ("th", "Thai");
            array.Add ("tr", "Turkish");
            array.Add ("cy", "Welsh");
            array.Add ("uk", "Ukrainian");
            array.Add ("es", "Spanish");
            array.Add ("iw", "Hebrew");
            array.Add ("el", "Greek");
            array.Add ("hu", "Hungarian");
            array.Add ("it", "Italian");
            array.Add ("yi", "Yiddish");
            array.Add ("hi", "Hindi");
            array.Add ("id", "Indonesian");
            array.Add ("vi", "Vietnamese");
            #endregion

            List<Language> languages = new List<Language>();
            foreach (DictionaryEntry element in array)
            {
                languages.Add(new Language(element.Key.ToString(), element.Value.ToString()));
            }
            return languages;
        }

        /// <summary>
        /// btnSwitch_Click
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnSwitch_Click(object sender, EventArgs e)
        {
            string languageSource = cmbSource.SelectedValue.ToString();
            string languageTarge = cmbTarge.SelectedValue.ToString();

            cmbSource.SelectedValue = languageTarge;
            cmbTarge.SelectedValue = languageSource;

            StartTranslate();

        }

        /// <summary>
        /// UrlEncode
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        private string UrlEncode(string str)
        {
            return System.Web.HttpUtility.UrlEncode(str, System.Text.Encoding.UTF8);
        }

        /// <summary>
        /// SetAutoRun
        /// </summary>
        /// <param name="fileName"></param>
        /// <param name="isAutoRun"></param>
        public static void SetAutoRun(string fileName, bool isAutoRun)
        {
            RegistryKey reg = null;
            try
            {
                if (!System.IO.File.Exists(fileName))
                    throw new Exception("The file does not exist!");
                String name = "Translate";
                reg = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Run", true);
                if (reg == null)
                    reg = Registry.LocalMachine.CreateSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Run");
                if (isAutoRun)
                    reg.SetValue(name, fileName + " ONSTART");
                else
                    reg.SetValue(name, false);
            }
            catch (Exception ex)
            {
                throw new Exception(ex.ToString());
            }
            finally
            {
                if (reg != null)
                    reg.Close();
            }

        }    

        /// <summary>
        /// btnRead_Click
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnRead_Click(object sender, EventArgs e)
        {
            string result = txtResult.Text;
            if (!string.IsNullOrEmpty(result))
            {
                sp.Rate = 0;
                sp.Speak(result, spFlags);
            }
        }

        /// <summary>
        /// OnFormClosing
        /// </summary>
        /// <param name="e"></param>
        protected override void OnFormClosing(FormClosingEventArgs e)
        {
            if (!isExit)
            {
                WindowState = FormWindowState.Minimized;
                e.Cancel = true;
            }
        }

        /// <summary>
        /// toolStripMenuItemAutoStart_CheckedChanged
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void toolStripMenuItemAutoStart_CheckedChanged(object sender, EventArgs e)
        {
            SetAutoRun(Application.ExecutablePath, toolStripMenuItemAutoStart.Checked);
        }

        /// <summary>
        /// toolStripMenuItemExit_Click
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void toolStripMenuItemExit_Click(object sender, EventArgs e)
        {
            isExit = true;
            Application.Exit();
        }

        /// <summary>
        /// MainForm_Load
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void MainForm_Load(object sender, EventArgs e)
        {
            _regisKey.Keys = Keys.T;
            _regisKey.ModKey = HotKeyClass.MODKEY.MOD_CONTROL;
            _regisKey.WindowHandle = this.Handle;
            _regisKey.HotKey += new HotKeyClass.HotKeyPass(Regis_HotKey);
            _regisKey.StarHotKey();
        }

        /// <summary>
        /// Regis_HotKey
        /// </summary>
        /// <param name="e"></param>
        private void Regis_HotKey()
        {
            if (WindowState == FormWindowState.Minimized)
            {
                this.Show();
                WindowState = FormWindowState.Normal;
                this.Activate();
            }
            else
            {
                WindowState = FormWindowState.Minimized;
                this.Hide();
            }
        }

        #endregion 

        

    }

    #region LanguageClass
    /// <summary>
    /// Language
    /// </summary>
    public class Language
    {
        /// <summary>
        /// Language
        /// </summary>
        /// <param name="id"></param>
        /// <param name="name"></param>
        public Language(string id, string name)
        {
            this.LanguageKey = id;
            this.LanguageName = name;
        }

        /// <summary>
        /// LanguageKey
        /// </summary>
        public string LanguageKey
        {
            get;
            set;
        }

        /// <summary>
        /// Name
        /// </summary>
        public string LanguageName
        {
            get;
            set;
        }
    }

    #endregion

    #region TranslateRequest

    public class TranslateRequest
    {
        /// <summary>
        /// TranslateRequest
        /// </summary>
        public TranslateRequest(string source, string languageSource, string languageTarge)
        {
            this.Text = source;
            this.Source = languageSource;
            this.Targe = languageTarge;
        }

        /// <summary>
        /// Text
        /// </summary>
        public string Text
        {
            set;
            get;
        }

        /// <summary>
        /// Source
        /// </summary>
        public string Source
        {
            set;
            get;
        }

        /// <summary>
        /// Targe
        /// </summary>
        public string Targe
        {
            set;
            get;
        }
    }

    #endregion

}