using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Web;


namespace CrawRobot.Class
{
   public class GetNumbers
    {
        // 数字识别
        public static string Numbers(string Base64Pic)
        {
            string token = GetTokenHelper.getAccessToken();
            string host = "https://aip.baidubce.com/rest/2.0/ocr/v1/numbers?access_token=" + token;
            Encoding encoding = Encoding.Default;
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(host);
            request.Method = "post";
            request.KeepAlive = true;
            // 图片的base64编码
            string base64 = Base64Pic.Replace("data:image/png;base64,", "").Replace("data:image/jgp;base64,", "").Replace("data:image/jpg;base64,", "").Replace("data:image/jpeg;base64,", "");
            String str = "image=" + HttpUtility.UrlEncode(base64);
            byte[] buffer = encoding.GetBytes(str);
            request.ContentLength = buffer.Length;
            request.GetRequestStream().Write(buffer, 0, buffer.Length);
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.Default);
            string result = reader.ReadToEnd();
            JObject jo = null;

            var joResult = "";

            jo = (JObject)JsonConvert.DeserializeObject(result);
            if (jo["words_result_num"].ToString() != "0")
            {
                joResult = jo["words_result"][0]["words"].ToString();
            }

            return joResult;

        }
        // 通用文字识别
        public static string GeneralBasic(string fileName)
        {
            try
            {
                string token = GetTokenHelper.getAccessToken();
                //string host = "https://aip.baidubce.com/rest/2.0/ocr/v1/accurate_basic?access_token=" + token;
                string host = "https://aip.baidubce.com/rest/2.0/ocr/v1/general_basic?access_token=" + token;
                Encoding encoding = Encoding.Default;
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(host);
                request.Method = "post";
                request.KeepAlive = true;
                // 图片的base64编码
                string base64 = fileName.Replace("data:image/png;base64,", "").Replace("data:image/jgp;base64,", "").Replace("data:image/jpg;base64,", "").Replace("data:image/jpeg;base64,", "");
                string str = "image=" + HttpUtility.UrlEncode(base64);
                byte[] buffer = encoding.GetBytes(str);
                request.ContentLength = buffer.Length;
                request.GetRequestStream().Write(buffer, 0, buffer.Length);
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
                string result = reader.ReadToEnd();
                //LogHelper.Info("系统识别成功！\r\n" + result);
                return result;
            }
            catch (Exception e)
            {
                //LogHelper.Error(e.ToString() + "\r\n" + e.Message.ToString());
                return "Exception";
            }

        }

        public static string GetCheckInfo(int iLeft, int iTop, int iWidth, int iHeight)
        {
            //int iWidth = 596;
            //int iHeight = 58;
            Bitmap myImage = new Bitmap(iWidth, iHeight);
            Graphics gla = Graphics.FromImage(myImage);
            gla.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
            gla.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
            gla.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
            gla.CopyFromScreen(iLeft, iTop, 0, 0, new Size(iWidth, iHeight));
            myImage.Save(System.AppDomain.CurrentDomain.BaseDirectory + "/ZFYZ.png");
            //字面是对当前图片进行了二进制转换
            MemoryStream ms = new MemoryStream();
            myImage.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
            byte[] arr = new byte[ms.Length];
            ms.Position = 0;
            ms.Read(arr, 0, (int)ms.Length);
            ms.Close();
            string Base64Pic = Convert.ToBase64String(arr);
            return Base64Pic;
        }

        public static string getFileBase64(String fileName)
        {
            FileStream filestream = new FileStream(fileName, FileMode.Open);
            byte[] arr = new byte[filestream.Length];
            filestream.Read(arr, 0, (int)filestream.Length);
            string baser64 = Convert.ToBase64String(arr);
            filestream.Close();
            return baser64;
        }
    }
}