using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Security.Cryptography;
using System.Text;
using System.Web.Script.Serialization;

namespace DataexchangeServer.Helper
{
    /// SignUnit 签名属性常量类
    public class SignConst
    {
        public SignConst()
        {
            //this.appKey = "270ea37852e8f7cced1c2a7198b818b1";
           // this.operateCompanyCode = "40373154";
           // this.ownerCompanyCode = "40373154";
           // this.appSecret = "d74b514466f3dac0136b5672b914176a";
            this.appKey = "86d3ae868978beff0d39948c420ec4ff";
            this.operateCompanyCode = "52265397";
            this.ownerCompanyCode = "52265397";
            this.appSecret = "978f5b950aefc3c1e0d4a56a562b0f8c";
          //  this.appKey = "56d6b68cd8fff627bf3203b44d9c8821";
          //  this.operateCompanyCode = "19378112";
          //  this.ownerCompanyCode = "19378112";
          //  this.appSecret = "4b26874c9d7ee95c3de85390d96dbbaf";
            this.version = "1.0";
        }

        public string appKey { get; set; }
        public string version { get; set; }
        public string operateCompanyCode { get; set; }
        public string ownerCompanyCode { get; set; }
        public string appSecret { get; set; }
    }
}

namespace DataexchangeServer.Helper
{
    /// API相关参数定义的全局类
    public partial class ApiGlobal
    {
        public ApiGlobal() { }

        /// 初始化
        public static void Init()
        {
            signConst = new SignConst();
        }

        public static SignConst signConst { get; set; }
    }
}


namespace DataexchangeServer.Helper
{
    /// SignUtils 签名工具类
    public class SignUtils
    {
        public static MD5 md5 = MD5.Create();
        private static IEnumerator<KeyValuePair<string, string>> dem;

        public static object buildCurrentSign(IDictionary<string, string> parameters, String appSecret)
        {
            try
            {
                string secret = ":" + appSecret;
                IDictionary<string, string> sortedParams = new SortedDictionary<string, string>(parameters, StringComparer.Ordinal);
            //    IEnumerator < KeyValuePair<string, string> & Gt; 
                dem = sortedParams.GetEnumerator();
                StringBuilder query = new StringBuilder();
                while (dem.MoveNext())
                {
                    string key = dem.Current.Key;
                    string value = dem.Current.Value;
                    if (key == "sign")
                    {
                        continue;
                    }
                    if (!string.IsNullOrEmpty(key))
                    {
                        query.Append(value).Append(":");
                    }
                }
                string strvalue = query.ToString().TrimEnd(':') + secret;
                return MD5Encrypt32(strvalue);
            }
            catch (Exception)
            {
                throw new Exception("签名异常!");
            }
        }

        public static string MD5Encrypt32(string text)
        {
            string pwd = "";
            // 加密后是一个字节类型的数组，这里要注意编码UTF8/Unicode的选择　
            byte[] s = md5.ComputeHash(Encoding.UTF8.GetBytes(text));
            // 通过使用循环，将字节类型的数组转换为字符串，此字符串是常规字符格式化所得
            for (int i = 0; i < s.Length; i++)
            {
                //将得到的字符串使用十六进制类型格式。格式后的字符是小写的字母，如果使用大写（X）则格式后的字符是大写字符 
                pwd = pwd + s[i].ToString("x2");
            }
            return pwd.ToString().ToLower();
        }

        public static long GetTimestamp(DateTime d)
        {
            TimeSpan ts = d.ToUniversalTime() - new DateTime(1970, 1, 1);
            return (long)ts.TotalSeconds;     //精确到秒
        }
    }
}


namespace DataexchangeServer.Helper
{
    /// ApiCommonParam API请求对应的Common参数类
    public class ApiCommonParam
    {
        public ApiCommonParam() { }

        public ApiCommonParam(string appKey, string version, string operateCompanyCode, string ownerCompanyCode, long timestamps)
        {
            this.appKey = appKey;
            this.version = version;
            this.operateCompanyCode = operateCompanyCode;
            this.ownerCompanyCode = ownerCompanyCode;
            this.timestamps = timestamps;
        }

        public string appKey { get; set; }//appKey    
        public string version { get; set; }//接口版本
        public string ownerCompanyCode { get; set; }//数据所属公司编码
        public string operateCompanyCode { get; set; }//操作者所属公司编码
        public string sign { get; set; }//签名
        public long timestamps { get; set; }//请求的时间戳
     //   public object reserver { get; set; }//扩展字段

        /// 构造对象
        public static ApiCommonParam NewApiCommon()
        {
            //构造对象
            ApiCommonParam param = new ApiCommonParam(ApiGlobal.signConst.appKey, ApiGlobal.signConst.version, ApiGlobal.signConst.operateCompanyCode, ApiGlobal.signConst.ownerCompanyCode, SignUtils.GetTimestamp(DateTime.Now));
            //计算签名&赋值
            JavaScriptSerializer json = new JavaScriptSerializer();
            string jsonParam = json.Serialize(param);
            var paramDict = JsonConvert.DeserializeObject<Dictionary<string, string>>(jsonParam);
            param.sign = (string)SignUtils.buildCurrentSign(paramDict, ApiGlobal.signConst.appSecret);
            return param;
        }
    }
}