using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Security.Cryptography;
using System.Text;
using Sog;
using LitJson;
using ProtoCSStruct;

namespace HttpProxy
{
    public class HeroAuth
    {
        // 测试地址
        //private static readonly string _baseUrl = "http://180.76.56.137:30008";

        // 正式地址
        private static readonly string _baseUrl = "https://time.0sdk.com:35876";

        private static string _getAccTokenUrl = "/user/getAccessToken";
        private static string _getUserInfoUrl = "/v1/user/userInfo.lg";
        private static string _postContentType = "multipart/form-data; boundary=-----------------";

        // 游戏产品id
        private static string _productId;
        private static string _appKey;
        private static MD5 _md5;

        public static void Init(string productId, string appKey)
        {
            _productId = productId;
            _appKey = appKey;
            _md5 = MD5.Create();
            _getAccTokenUrl = _baseUrl + _getAccTokenUrl;
            _getUserInfoUrl = _baseUrl + _getUserInfoUrl;
            _postContentType += DateTime.Now.Ticks.ToString("x");
        }

        public static string CreateData(Dictionary<string, object> keyVal)
        {
            JsonData data = new JsonData();
            foreach (KeyValuePair<string, object> pair in keyVal)
            {
                data[pair.Key] = new JsonData(pair.Value);
            }

            string jsonStr = data.ToJson();
            string finalData = Convert.ToBase64String(Encoding.ASCII.GetBytes(jsonStr));

            if (finalData.Length > 51)
            {
                char[] array = finalData.ToCharArray();
                SwapChar(array, 1, 33);
                SwapChar(array, 10, 42);
                SwapChar(array, 18, 50);
                SwapChar(array, 19, 51);
                finalData = new string(array);
            }

            return finalData;
        }

        private static void SwapChar(char[] str, int idx1, int idx2)
        {
            if (idx1 >= 0 && idx2 >= 0 && str.Length > Math.Max(idx1, idx2))
            {
                char tmp = str[idx1];
                str[idx1] = str[idx2];
                str[idx2] = tmp;
            }
        }

        private static string CreateParamsStr(Dictionary<string, string> allParam)
        {
            // sign不参与签名
            allParam.Remove("sign");
            // market不参与签名, 虽然文档里没写, 但是对方给的示例代码里面排除了, 先排除, 有问题再回复
            //allParam.Remove("market");

            StringBuilder sb = new StringBuilder();
            // 生成签名串, "k1=v1&k2=v2...&_appKey"
            var sortPairs = from pair in allParam orderby pair.Key select pair;
            foreach (KeyValuePair<string, string> pair in sortPairs)
            {
                sb.Append(pair.Key).Append('=').Append(pair.Value).Append('&');
            }
            sb.Append(_appKey);

            return sb.ToString();
        }

        // 传入按字母排序后的请求参数, 不包含_appKey, 返回签名
        private static string CalcSign(Dictionary<string, string> allParam)
        {
            var str = CreateParamsStr(allParam);

            byte[] md5Hash = _md5.ComputeHash(Encoding.UTF8.GetBytes(str));
            string md5Str = BitConverter.ToString(md5Hash).Replace("-", "").ToLower();
            if (md5Str.Length > 23)
            {
                char[] array = md5Str.ToCharArray();
                SwapChar(array, 1, 13);
                SwapChar(array, 5, 17);
                SwapChar(array, 7, 23);
                md5Str = new string(array);
            }
            return md5Str;
        }

        public static string GetAccessToken(string authCode)
        {
            var allParams = new Dictionary<string, string>();
            allParams["productId"] = _productId;
            allParams["code"] = authCode;
            allParams["timeStamp"] = HttpProxyServerUtils.GetTimeSecond().ToString();
            
            // sign以外的字段全部添加到上面用于计算签名
            allParams["sign"] = CalcSign(allParams);

            var content = new FormUrlEncodedContent(allParams);
            string ret = HttpUtils.HttpPost(_getAccTokenUrl, content, out bool exception);
            if (ret == null)
            {
                TraceLog.Error("HeroAuth.GetAccessToken HttpPost return null query failed");
                return null;
            }

            TraceLog.Trace("HeroAuth.GetAccessToken ret {0}", ret);

            JsonData jsonData = JsonMapper.ToObject(ret);
            JsonData codeData = jsonData["code"];
            int code = codeData != null ? (int)codeData : -1;
            if (code != 200)
            {
                TraceLog.Trace("HeroAuth.GetAccessToken res code {0} not 200 (succ)", code);
                return null;
            }

            return jsonData["data"].ToString();
        }

        public static bool GetUserInfo(string accessToken, out string userId, out string userName)
        {
            userId = null;
            userName = null;

            var allParams = new Dictionary<string, string>();
            allParams["productId"] = _productId;
            allParams["accessToken"] = accessToken;
            allParams["timeStamp"] = HttpProxyServerUtils.GetTimeSecond().ToString();

            // sign以外的字段全部添加到上面用于计算签名
            allParams["sign"] = CalcSign(allParams);

            var content = new FormUrlEncodedContent(allParams);
            string ret = HttpUtils.HttpPost(_getUserInfoUrl, content, out bool exception);
            if (ret == null)
            {
                TraceLog.Error("HeroAuth.GetUserInfo HttpGet return null query failed");
                return false;
            }

            TraceLog.Trace("HeroAuth.GetUserInfo ret {0}", ret);

            JsonData jsonData = JsonMapper.ToObject(ret);
            JsonData codeData = jsonData["code"];
            int code = codeData != null ? (int)codeData : -1;
            if (code != 200)
            {
                TraceLog.Trace("HeroAuth.GetAccessToken res code {0} not 200 (succ)", code);
                return false;
            }

            JsonData data = jsonData["data"];
            userId = data["userId"].ToString();
            userName = data["userName"].ToString();
            return true;
        }

#if HERO_AUTH_POST_FORM_DATA
        public static string GetAccessToken(string authCode)
        {
            string timeSec = HttpProxyServerUtils.GetTimeSecond().ToString();
            var allParams = new Dictionary<string, string>();
            allParams["productId"] = _productId;
            allParams["code"] = authCode;
            allParams["timeStamp"] = timeSec;

            MultipartFormDataContent content = new MultipartFormDataContent();
            content.Headers.Add("ContentType", _postContentType);
            content.Add(new StringContent(_productId), "productId");
            content.Add(new StringContent(authCode), "code");
            content.Add(new StringContent(timeSec), "timeStamp");
            content.Add(new StringContent(CalcSign(allParams)), "sign");

            string ret = HttpUtils.HttpPost(_getAccTokenUrl, content, out bool exception);
            if (ret == null)
            {
                TraceLog.Error("HeroAuth.GetAccessToken HttpPost return null query failed");
                return null;
            }

            TraceLog.Trace("HeroAuth.GetAccessToken ret {0}", ret);

            JsonData jsonData = JsonMapper.ToObject(ret);
            JsonData codeData = jsonData["code"];
            int code = codeData != null ? (int)codeData : -1;
            if (code != 200)
            {
                TraceLog.Trace("HeroAuth.GetAccessToken res code {0} not 200 (succ)", code);
                return null;
            }

            return jsonData["data"].ToString();
        }

        public static bool GetUserInfo(string accessToken, out string userId, out string userName)
        {
            userId = null;
            userName = null;

            string timeSec = HttpProxyServerUtils.GetTimeSecond().ToString();
            var allParams = new Dictionary<string, string>();
            allParams["productId"] = _productId;
            allParams["accessToken"] = accessToken;
            allParams["timeStamp"] = timeSec;

            MultipartFormDataContent content = new MultipartFormDataContent();
            content.Headers.Add("ContentType", _postContentType);
            content.Add(new StringContent(_productId), "productId");
            content.Add(new StringContent(accessToken), "accessToken");
            content.Add(new StringContent(timeSec), "timeStamp");
            content.Add(new StringContent(CalcSign(allParams)), "sign");

            string ret = HttpUtils.HttpPost(_getUserInfoUrl, content, out bool exception);
            if (ret == null)
            {
                TraceLog.Error("HeroAuth.GetUserInfo HttpGet return null query failed");
                return false;
            }

            TraceLog.Trace("HeroAuth.GetUserInfo ret {0}", ret);

            JsonData jsonData = JsonMapper.ToObject(ret);
            JsonData codeData = jsonData["code"];
            int code = codeData != null ? (int)codeData : -1;
            if (code != 200)
            {
                TraceLog.Trace("HeroAuth.GetAccessToken res code {0} not 200 (succ)", code);
                return false;
            }

            JsonData data = jsonData["data"];
            userId = data["userId"].ToString();
            userName = data["userName"].ToString();
            return true;
        }
#endif

    }
}