using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Runtime.ExceptionServices;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace paddleOCR
{
    public class PaddleOCRHelper
    {
        static string pythonEnvPath = ConfigHelper.Config.Get("pythonEnvPath", "C:\\ProgramData\\miniconda3\\envs\\paddle_env\\");
        private static Process progressTest;
        /// <summary>
        /// 开始检测
        /// </summary>
        /// <param name="pythonExePath">python解释器路径</param>
        /// <param name="pythonFile">python文件</param>
        /// <param name="imgPath">图像文件路径</param>
        /// <returns></returns>
        public static string StartPythonOcr(string imgPath)
        {
            string state = "";
            try
            {
                string sArguments = ".\\paddleOCR.py" + " " + imgPath;
                ProcessStartInfo start = new ProcessStartInfo();
                start.FileName = pythonEnvPath + "python.exe" + " ";//环境路径需要配置好
                start.Arguments = sArguments;
                start.UseShellExecute = false;
                start.RedirectStandardOutput = true;
                start.RedirectStandardInput = true;
                start.RedirectStandardError = true;
                start.CreateNoWindow = true;
                using (progressTest = Process.Start(start))
                {
                    state = progressTest.StandardOutput.ReadToEnd();
                    progressTest.WaitForExit(30000);
                    //// 异步获取命令行内容
                    //progressTest.BeginOutputReadLine();
                    //// 为异步获取订阅事件
                    //progressTest.OutputDataReceived += new DataReceivedEventHandler(outputDataReceived);
                }
                string[] result = state.Split(new string[] { "\r\n" }, StringSplitOptions.None);
                state = "";
                if (result != null && result.Length > 1)
                {
                    foreach (var item in result.Reverse())
                    {
                        if (item.Contains("OCR-Result:"))
                        {
                            var ocrR = item.Substring(12);
                            if (!string.IsNullOrEmpty(ocrR))
                            {
                                var lst = DeserializeJsonToList<string>(ocrR);
                                if (lst != null && lst.Count > 0)
                                {
                                    state = string.Join(" ", lst);
                                    //LogNet.log.Info($"Paddle Python OCR匹配[" + $"{(DateTime.Now - startTime).TotalSeconds.ToString("f2")}s" + "]:" + state);
                                }
                                else
                                {
                                    state = "";
                                }
                            }

                            break;
                        }
                    }
                    return state;
                }
                else
                    return "";
            }
            catch (Exception ex)
            {
                //LogNet.log.Error("Paddle OCR匹配异常", ex);
            }
            return "";
        }

        [HandleProcessCorruptedStateExceptions]
         public static string StartCPlusOcr(string imgPath)
        {
            StringBuilder sb = new StringBuilder(1024);
            try
            {
                eyemOCRRecognizer(".\\config.txt", imgPath, sb);
            }
            catch (Exception ex)
            { 
                return ex.Message;
            }
            return sb.ToString().Trim();
        }
        static List<T> DeserializeJsonToList<T>(string json) where T : class
        {
            JsonSerializer serializer = new JsonSerializer();
            StringReader sr = new StringReader(json);
            object o = serializer.Deserialize(new JsonTextReader(sr), typeof(List<T>));
            List<T> list = o as List<T>;
            return list;
        }
        [DllImport("PaddleOCRSDK.dll", CharSet = CharSet.None, CallingConvention = CallingConvention.Cdecl)]
        private static extern int eyemOCRRecognizer(string extractorModelPath, string path, [MarshalAs(UnmanagedType.LPStr)] StringBuilder lpszContent);
    }
}