using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net;
using System.Security.Cryptography;
using System.Text;
using System.Threading;
using System.Windows.Forms;

namespace VSoft.Tools
{
    public partial class FrmTrans : Skins.SKinForm
    {
        public FrmTrans()
        {
            InitializeComponent();
            CbbLngFrom.SelectedIndex = 0;
            CbbLngTo.SelectedIndex = 0;
        }
        private string Tran(string from_txt,string lng_from,string lng_to)
        {
            try
            {
                if (from_txt.Length == 0) { return ""; }
                // 原文
                string q = from_txt;
                // 源语言
                string from = lng_from;
                // 目标语言
                string to = lng_to;
                // 改成您的APP ID
                string appId = "20220508001207657";
                Random rd = new Random();
                string salt = rd.Next(100000).ToString();
                // 改成您的密钥
                string secretKey = "l6ngE7GjtdvRESJqQzDL";
                RyWeb.QuickWeb web = new RyWeb.QuickWeb();
                string sign = EncryptString(appId + q + salt + secretKey);
                string post_data = "q=" + web.UrlEncode(q);
                post_data += "&from=" + from;
                post_data += "&to=" + to;
                post_data += "&appid=" + appId;
                post_data += "&salt=" + salt;
                post_data += "&sign=" + sign;
                var http= web.Post("http://api.fanyi.baidu.com/api/trans/vip/translate", post_data);
                JObject jo = JObject.Parse(http.Html);
                var trans_result = jo["trans_result"];
                if (trans_result != null)
                {
                    var jarr = (JArray)trans_result;
                    var text = "";
                    for (int i = 0; i < jarr.Count; i++)
                    {
                        if (text.Length > 0) { text += "\r\n"; }
                        if (jarr[i] != null)
                        {
                            var dst = jarr[i]["dst"];
                            if (dst != null) { text+= dst.ToString(); }
                        }
                    }
                    last_text = from_txt;
                    return text;
                }
                return "";
            }
            catch(Exception ex) { return "错误=>"+ex.Message; }
        }
        string last_text = "";
        // 计算MD5值
        public static string EncryptString(string str)
        {
            MD5 md5 = MD5.Create();
            // 将字符串转换成字节数组
            byte[] byteOld = Encoding.UTF8.GetBytes(str);
            // 调用加密方法
            byte[] byteNew = md5.ComputeHash(byteOld);
            // 将加密结果转换为字符串
            StringBuilder sb = new StringBuilder();
            foreach (byte b in byteNew)
            {
                // 将字节转换成16进制表示的字符串，
                sb.Append(b.ToString("x2"));
            }
            // 返回加密的字符串
            return sb.ToString();
        }
        private void Trans()
        {
            var lng_from = lng_convert(CbbLngFrom.Text);
            var lng_to = lng_convert(CbbLngTo.Text);
            string lng_convert(string lng_text)
            {
                if (lng_text == "自动") { return "auto"; }
                else if (lng_text == "中文") { return "zh"; }
                else if (lng_text == "英文") { return "en"; }
                else if (lng_text == "日语") { return "jp"; }
                else if (lng_text == "韩语") { return "kor"; }
                else { return ""; }
            }
            var from_text = RichText.Text;
            Thread th = new Thread(Start);
            th.Start();
            void Start()
            {
                var to_text= Tran(from_text, lng_from, lng_to);
                this.Invoke(new Action(() =>
                {
                    RichResult.Text = to_text;
                }));
            }
        }
        private void CbbFrom_SelectedIndexChanged(object sender, EventArgs e)
        {
            Trans();
        }

        private void CbbTo_SelectedIndexChanged(object sender, EventArgs e)
        {
            Trans();
        }
        
        private void RichText_TextChanged(object sender, EventArgs e)
        {
            Trans();
        }

        private void FrmTrans_Load(object sender, EventArgs e)
        {
            var screen = Screen.FromPoint(MousePosition).WorkingArea;
            this.Location = new Point(screen.Left+ ((screen.Width-this.Width)/2),screen.Top+ ((screen.Height - this.Height) / 2));
        }
    }
}