using System;
using System.Collections.Generic;
using Library;
using System.Security.Cryptography.X509Certificates;
using System.Security.Cryptography;
using System.Text;
using System.IO;
using LitJson;
using System.Net;

namespace MySystem
{
    public class WeChatFunction
    {
        public WeChatFunction()
        {
        }

        #region 服务商平台查询申请单状态API

        public Dictionary<string, object> QueryMerchant(string BusinessCode)
        {
            Dictionary<string, object> return_result = new Dictionary<string, object>();
            try
            {
                string merchantId = "1613112281";   //商户号
                string serialNo = "61D99F7218B487788E35D6C4E3ED398E0979D3F6";  //证书编号
                string result = postJson("https://api.mch.weixin.qq.com/v3/applyment4sub/applyment/business_code/" + BusinessCode, "", prikey, merchantId, serialNo, "GET");
                //{\"applyment_id\":2000002247709762,\"applyment_state\":\"APPLYMENT_STATE_FINISHED\",\"applyment_state_msg\":\"商户入驻申请已完成\",\"audit_detail\":[],\"business_code\":\"0123456789\",\"sign_url\":\"https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=gQFv7zwAAAAAAAAAAS5odHRwOi8vd2VpeGluLnFxLmNvbS9xLzAyUXE1czkzb3JlUjIxZHpXbTF5Y2YAAgRjbe9hAwQAjScA\",\"sub_mchid\":\"1619775262\"}
                JsonData jsonObj = JsonMapper.ToObject(result);
                return_result.Add("applyment_id", jsonObj["applyment_id"].ToString()); //微信支付申请单号
                return_result.Add("applyment_state", jsonObj["applyment_state"].ToString()); //申请单状态
                return_result.Add("applyment_state_msg", jsonObj["applyment_state_msg"].ToString()); //申请状态描述
                if (jsonObj["applyment_state"].ToString() == "APPLYMENT_STATE_REJECTED")
                {
                    List<Dictionary<string, string>> audit_detail = new List<Dictionary<string, string>>();
                    JsonData auditObj = jsonObj["audit_detail"]; //驳回原因详情
                    for (int i = 0; i < auditObj.Count; i++)
                    {
                        Dictionary<string, string> row = new Dictionary<string, string>();
                        row.Add("field", auditObj[i]["field"].ToString()); //字段名
                        row.Add("field_name", auditObj[i]["field_name"].ToString()); //字段名称
                        row.Add("reject_reason", auditObj[i]["reject_reason"].ToString()); //驳回原因
                        audit_detail.Add(row);
                    }
                    return_result.Add("audit_detail", audit_detail); //申请状态描述
                }
                if (result.Contains("\"sign_url\":"))
                { 
                    return_result.Add("sign_url", jsonObj["sign_url"].ToString()); //进件通过申请，待商家签约的地址
                }
            }
            catch (Exception ex)
            {
                function.WriteLog(DateTime.Now.ToString() + "\r\n" + ex.ToString(), "服务商平台查询申请单状态API异常");
            }
            return return_result;
        }
        #endregion

        #region 敏感信息加密

        // string pubkey = "MIIBCgKCAQEAxK9K2ElQ0rUMwNFW4xMx7kmkpDlp7WGQ8VffXLpudJBIrRVFWJN7dlinCGu67ZATf+/GZvLSSzQPWejHEsI9vUp9ej0x5iZDHGc9/shNUjd03ORkKo/Ohj3Ju19RzX4mh+GoinKGiuKX8CdGPXPe7UObKWyETrDcxrit6VCJQjE604aNtVeAUE+41mOpCLGzTgAKt4psfHxsBRtqlveH4cH/51ip+cGkC/u36gfDMKaRluVfFO3ETxDkI94BwNtnthcA4WDKha+wjtB6HIJ5xxHV550+cfdkl4j8UKU6pB+C5JRNgvjAf6ljg/TF+cGF1d8C6IbYYodYKloqN2DzrwIDAQAB"; //公钥
        string pubkey = "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";
        string prikey = "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"; //私钥
        public string RSAEncrypt(string text)
        {
            byte[] publicKey = Convert.FromBase64String(pubkey);
            // var rsa = RSA.Create();
            // rsa.ImportRSAPublicKey(publicKey, out _);
            // var buff = rsa.Encrypt(Encoding.UTF8.GetBytes(text), RSAEncryptionPadding.OaepSHA1);
            // return Convert.ToBase64String(buff);
            using (var x509 = new X509Certificate2(publicKey))
            {
                using (var rsa = x509.GetRSAPublicKey())
                {
                    var buff = rsa.Encrypt(Encoding.UTF8.GetBytes(text), RSAEncryptionPadding.OaepSHA1);
                    return Convert.ToBase64String(buff);
                }
            }
        }
        public string postJson(string url, string postData, string privateKey, string merchantId, string serialNo, string method = "POST")
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Method = method;
            request.ContentType = "application/json;charset=UTF-8";
            request.UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3100.0 Safari/537.36";
            request.Accept = "application/json";

            string Authorization = GetAuthorization(url, method, postData, privateKey, merchantId, "4DD075520570E89C215AD816F67083C3DC7053C8");
            request.Headers.Add("Authorization", Authorization);
            request.Headers.Add("Wechatpay-Serial", serialNo);
            if (!string.IsNullOrEmpty(postData))
            {
                byte[] paramJsonBytes;
                paramJsonBytes = System.Text.Encoding.UTF8.GetBytes(postData);
                request.ContentLength = paramJsonBytes.Length;
                Stream writer;
                try
                {
                    writer = request.GetRequestStream();
                }
                catch (Exception)
                {
                    writer = null;
                    Console.Write("连接服务器失败!");
                }
                writer.Write(paramJsonBytes, 0, paramJsonBytes.Length);
                writer.Close();
            }

            HttpWebResponse response;
            try
            {
                response = (HttpWebResponse)request.GetResponse();
            }
            catch (WebException ex)
            {
                response = ex.Response as HttpWebResponse;
            }
            Stream resStream = response.GetResponseStream();
            StreamReader reader = new StreamReader(resStream);
            string text = reader.ReadToEnd();
            return text;
            //{\"code\":\"PARAM_ERROR\",\"message\":\"请确认待处理的消息是否为加密后的密文\"}
            //{\"applyment_id\":2000002247709762}
        }

        #endregion

        #region 图片上传

        public string GetMediaId(string imgPath)
        {
            if (string.IsNullOrEmpty(imgPath))
            {
                return "";
            }
            string key = "wechatpic:" + function.MD5_16(imgPath);
            string media_id = BothdisDbconn.Instance.Get<string>(key);
            if (!string.IsNullOrEmpty(media_id))
            {
                return media_id;
            }
            string filePath = function.getPath(imgPath);
            var filename = Path.GetFileName(filePath);
            FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read);
            Byte[] imgBytesIn = new Byte[fs.Length];
            fs.Read(imgBytesIn, 0, imgBytesIn.Length);
            fs.Close();

            byte[] hash = SHA256Managed.Create().ComputeHash(imgBytesIn);

            StringBuilder builder = new StringBuilder();
            for (int i = 0; i < hash.Length; i++)
            {
                builder.Append(hash[i].ToString("x2"));
            }
            var sha256 = builder.ToString();
            string metaStr = "{\"filename\":\""+ filename + "\",\"sha256\":\"" + sha256 + "\"}";
            media_id = UploadImgApi(metaStr, imgBytesIn, filename);
            BothdisDbconn.Instance.Set(key, media_id);
            return media_id;
        }

        public string UploadImgApi(string metaStr, Byte[] imgBytesIn,string filename)
        {
            string url = "https://api.mch.weixin.qq.com/v3/merchant/media/upload";
            
            string merchantId = "1613112281";   //商户号
            string serialNo = "4DD075520570E89C215AD816F67083C3DC7053C8";  //证书编号
            string privateKey = prikey;
            #region 定义请求体中的内容 并转成二进制

            string boundary = "lc199aecd61b4653ef";
            string Enter = "\r\n";
            string campaignIDStr1
                = "--" + boundary
                + Enter
                + "Content-Disposition: form-data; name=\"meta\";"
                + Enter
                + "Content-Type:application/json;"
                + Enter
                + Enter
                + metaStr
                + Enter
                + "--" + boundary
                + Enter
                + "Content-Disposition:form-data;name=\"file\";filename=\""+ filename + "\";"
                + Enter
                + "Content-Type:image/jpeg"
                + Enter
                + Enter;
            byte[] byteData2
                = imgBytesIn;
            string campaignIDStr3 
                = Enter
                + "--" + boundary 
                + Enter;
            var byteData1 = System.Text.Encoding.UTF8.GetBytes(campaignIDStr1);

            var byteData3 = System.Text.Encoding.UTF8.GetBytes(campaignIDStr3);
            #endregion

            string transactionsResponse = UploadImg_postJson(url, byteData1, byteData2, byteData3, metaStr, privateKey, merchantId, serialNo, boundary, "POST");
            var result=JsonMapper.ToObject(transactionsResponse);
            return result["media_id"].ToString();
        }
        public string UploadImg_postJson(string url, byte[] b1, byte[] b2, byte[] b3, string metaStr, string privateKey, string merchantId, string serialNo, string boundary, string method = "POST")
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Method = method;
            //request.ContentType = "application/json;charset=UTF-8";
            request.ContentType = "multipart/form-data;boundary=" + boundary;
            request.UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3100.0 Safari/537.36";
            request.Accept = "application/json";
            string Authorization = GetAuthorization(url, method, metaStr, privateKey, merchantId, serialNo);
            request.Headers.Add("Authorization", Authorization);

            Stream writer;
            try
            {
                writer = request.GetRequestStream();
            }
            catch (Exception)
            {
                writer = null;
            }
            writer.Write(b1, 0, b1.Length);
            writer.Write(b2, 0, b2.Length);
            writer.Write(b3, 0, b3.Length);
            writer.Close();

            HttpWebResponse response;
            try
            {
                response = (HttpWebResponse)request.GetResponse();
            }
            catch (WebException ex)
            {
                response = ex.Response as HttpWebResponse;
            }
            Stream resStream = response.GetResponseStream();
            StreamReader reader = new StreamReader(resStream);
            string text = reader.ReadToEnd();
            return text;
        }
        protected string GetAuthorization(string url, string method, string jsonParame, string privateKey, string merchantId, string serialNo)
        {
            var uri = new Uri(url);
            string urlPath = uri.PathAndQuery;
            string nonce = Guid.NewGuid().ToString();
            var timestamp = DateTimeOffset.Now.ToUnixTimeSeconds();
            //数据签名     HTTP请求方法\n接口地址的url\n请求时间戳\n请求随机串\n请求报文主体\n
            method = string.IsNullOrEmpty(method) ? "" : method;
            string message = string.Format("{0}\n{1}\n{2}\n{3}\n{4}\n", method, urlPath, timestamp, nonce, jsonParame);
            string signTxt = Sign(message, privateKey);

            //Authorization和格式
            string authorzationTxt = string.Format("WECHATPAY2-SHA256-RSA2048 mchid=\"{0}\",nonce_str=\"{1}\",timestamp=\"{2}\",serial_no=\"{3}\",signature=\"{4}\"",
                merchantId,
                nonce,
                timestamp,
                serialNo,
                signTxt
                );
            return authorzationTxt;
        }

        protected string Sign(string message, string privateKey)
        {
            byte[] keyData = Convert.FromBase64String(privateKey);
            byte[] data = System.Text.Encoding.UTF8.GetBytes(message);
            var rsa = RSA.Create();
            rsa.ImportPkcs8PrivateKey(keyData, out _);
            return Convert.ToBase64String(rsa.SignData(data, HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1));

            // using (CngKey cngKey = CngKey.Import(keyData, CngKeyBlobFormat.Pkcs8PrivateBlob))
            // using (RSACng rsa = new RSACng(cngKey))
            // {
            //     return Convert.ToBase64String(rsa.SignData(data, HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1));
            // }
        }

        #endregion

        #region 获取文件sha256

        public string GetSha256(FileStream stream)
        { 
            using (SHA256 mySHA256 = SHA256.Create())
            {
                byte[] hashValue = mySHA256.ComputeHash(stream);
                return Encoding.UTF8.GetString(hashValue);
            }
        }

        #endregion

        #region 判断长期

        public string CheckForever(DateTime? time)
        {
            if (time == null)
            {
                return "";
            }
            if (time.Value.Year >= 2050)
            {
                return "长期";
            }
            return time.Value.ToString("yyyy-MM-dd");
        }

        #endregion


    }
}