using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Security.Cryptography;

namespace TelpoPush.Position.Worker.Common
{
    public class Utils
    {
        public static MultipartFormDataContent GetMultipartFormDataContent(Dictionary<string, object> dic, string appId, ref Dictionary<string, object> outDic)
        {
            MultipartFormDataContent mfdc = new MultipartFormDataContent();
            StringBuilder sb = new StringBuilder();
            if (dic != null && dic.Count > 0)
            {
                var dicOrderBy = dic.OrderBy(z => z.Key);
                foreach (KeyValuePair<string, object> kv in dicOrderBy)
                {
                    sb.Append($"{kv.Key}={kv.Value.ToString()}&");
                    mfdc.Add(new StringContent(kv.Value.ToString()), kv.Key);//参数, 内容在前,参数名称在后
                }
            }
            string signStr = $"{sb.ToString().Trim('&')}{appId}";
            byte[] bytes = Encoding.UTF8.GetBytes(signStr);
            byte[] hash = SHA256.Create().ComputeHash(bytes);
            StringBuilder builder = new StringBuilder();
            for (int i = 0; i < hash.Length; i++)
            {
                builder.Append(hash[i].ToString("X2"));
            }
            string sign = builder.ToString().ToLower();
            dic.Add("sign", sign);
            mfdc.Add(new StringContent(sign), "sign");//参数, 内容在前,参数名称在后
            outDic = dic;
            return mfdc;
        }
    }
}