using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Security.Cryptography;
using Furion.RemoteRequest;
using System.Threading.Tasks;
using GDZZ.Application.Service.WXPay.Dto;
using System.Text.Json;

/// <summary>
///JsApiPay 的摘要说明
/// </summary>

public class JsApiPay : IHttpDispatchProxy
{

    const string PrivateKey = "App_Data/cert/apiclient_key.pem";

    public  async Task<JsPay> WithDrawsToWx(string url, string appid, string mchid, string serialNo, string openID, string partnerTradeNo, int totalFee, string hostting)
    {

        SortedDictionary<string, object> dic = new SortedDictionary<string, object>();
        dic.Add("appid", appid);
        dic.Add("out_batch_no", partnerTradeNo);
        dic.Add("batch_name", DateTime.Now.ToString("D") + "提现记录");
        dic.Add("batch_remark", DateTime.Now.ToString("D") + "提现记录");
        dic.Add("total_amount", totalFee);
        dic.Add("total_num", 1);

        List<object> list = new List<object>();
        SortedDictionary<string, object> dic1 = new SortedDictionary<string, object>();
        dic1.Add("out_detail_no", partnerTradeNo);
        dic1.Add("transfer_amount", totalFee);
        dic1.Add("transfer_remark", "提现记录");
        dic1.Add("openid", openID);

        list.Add(dic1);
        dic.Add("transfer_detail_list", list);

        return await WxV3PostJson(url, Newtonsoft.Json.JsonConvert.SerializeObject(dic), mchid, serialNo, hostting); ; ;
    }
    /// <summary>
    /// V3版本请求接口
    /// </summary>
    /// <param name="url">微信的接口地址</param>
    /// <param name="postData">post请求的数据，json格式 </param>
    /// <param name="privateKey">apiclient_key.pem中的内容，不要-----BEGIN PRIVATE KEY-----  -----END PRIVATE KEY-----</param>
    /// <param name="mchId">发起请求的商户（包括直连商户、服务商或渠道商）的商户号 mchid</param>
    /// <param name="serialNo">商户证书号</param>
    /// <param name="hostting"></param>
    /// <returns></returns>
    public async Task<JsPay> WxV3PostJson(string url, string postData, string mchId, string serialNo, string hostting)
    {
        string Authorization = GetAuthorization(url, "POST", postData, mchId, serialNo, hostting);
        var request = (HttpWebRequest)WebRequest.Create(url);
        request.Method = "POST";
        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";
        request.Headers.Add("Authorization", Authorization);
        byte[] byteData = System.Text.Encoding.UTF8.GetBytes(postData);
        request.ContentLength = byteData.Length;
        Stream writer;
        try
        {
            writer = request.GetRequestStream();
        }
        catch (Exception e)
        {
            Console.Write("连接服务器失败!");
            throw;
        }
        writer.Write(byteData, 0, byteData.Length);
        writer.Close();
        string responseString = "";
        HttpWebResponse response;
        try
        {
            response = (HttpWebResponse)request.GetResponse();
        }
        catch (WebException e)
        {
            response = e.Response as HttpWebResponse;
        }
        Stream resStream = response.GetResponseStream();
        StreamReader reader = new StreamReader(resStream);
        responseString = reader.ReadToEnd();
        return JsonSerializer.Deserialize<JsPay>(responseString);
    }

    private  string GetAuthorization(string url, string method, string jsonParame, string mchId, string serialNo, string hostting)
    {
        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, hostting);


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

    }

    private string Sign(string message, string hostting)
    {

        string base64X509Cert = "";
        string pemPublicCert = Path.Combine(hostting, PrivateKey);
        using (FileStream fs = new FileStream(pemPublicCert, FileMode.Open, FileAccess.Read))
        {
            using (StreamReader sr = new StreamReader(fs))
            {
                base64X509Cert = sr.ReadToEnd().Trim();
            }
        }
        base64X509Cert = base64X509Cert.Replace("-----BEGIN PRIVATE KEY-----", "").Replace("-----END PRIVATE KEY-----", "").Replace("\r", "").Replace("\n", "");

        // NOTE： 私钥不包括私钥文件起始的-----BEGIN PRIVATE KEY-----
        //        亦不包括结尾的-----END PRIVATE KEY-----

        byte[] keyData = Convert.FromBase64String(base64X509Cert);

        var rsa = RSA.Create();
        rsa.ImportPkcs8PrivateKey(keyData, out _);
        byte[] data = System.Text.Encoding.UTF8.GetBytes(message);
        var sigdata = rsa.SignData(data, HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1);
        var res = Convert.ToBase64String(sigdata);
        return res;
    }
}