using dodohold.core;
using System.Diagnostics;
using System.Net;
using System.Text.Json;
using System.Text.RegularExpressions;


namespace molilian.core
{
    public partial class AlimamaPlus
    {
        private const string AiOpenMcpUrl = "https://tmcp.taobao.com/mcp/union-ai-platform-server/mcp";
        private const string AiOpenSkillId = "R1LWxXhl.VRFe";
        private const string AiOpenTqlId = "tql_obSb3eZV";


        public async Task<TkDataDTO> endpoint_aiopen(string content, TkDataDTO result, CancellationToken cancellationToken = default)
        {
            Stopwatch stopwatch = Stopwatch.StartNew();
            string responseBody = string.Empty;
            result.channel = TkChannelEnum.tb;

            try
            {
                string accessKey = _account.appkey?.Trim() ?? string.Empty;
                string pid = _account.open_pid?.Trim() ?? string.Empty;

#if DEBUG
                accessKey = "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpc3MiOiJUTUNQIiwic3ViIjoiTExNX0FHRU5UOlBMQVRGT1JNOnVuaW9uLWFpLWdhdGV3YXk6VU5HV185NjkyNTIyNzIzX3VJQ1RsOERHIiwiaWF0IjoxNzg2MzY5NTc0LCJqdGkiOiIyMjUwZWMyOC04MDg2LTQwNTktODVjZi02NTYxNmZhZDU4MDUifQ.8ThEiO3aXMfzCS8gSk0d22hlK8rpqMxhUNMpQU6DZn0";
                pid = "mm_9692522723_3372850009_116175250382";
#endif

                if (string.IsNullOrEmpty(accessKey) || string.IsNullOrEmpty(pid))
                {
                    string reason = string.IsNullOrEmpty(accessKey) ? "Access Key 未配置" : "PID 未配置";
                    LogAiOpenFailure(content, reason, string.Empty);
                    return SetAiOpenFailure(result, "放弃转链", reason, TkSubCodeEnum.Other);
                }

                if (!pid.StartsWith("mm_", StringComparison.Ordinal))
                {
                    const string reason = "PID 格式不合法";
                    LogAiOpenFailure(content, reason, string.Empty);
                    return SetAiOpenFailure(result, reason, reason, TkSubCodeEnum.Other);
                }

                TimeSpan timeout = GetRequestTimeout2(result.elapsedTime2);
#if DEBUG
                timeout = TimeSpan.FromSeconds(60);
                _proxy = null;
#endif


                var initializePayload = new
                {
                    jsonrpc = "2.0",
                    id = $"init-{Guid.NewGuid():N}",
                    method = "initialize",
                    @params = new
                    {
                        protocolVersion = "2025-03-26",
                        capabilities = new { },
                        clientInfo = new
                        {
                            name = "openai-codex-agent",
                            version = "1.0.0"
                        }
                    }
                };

                var initializeResponse = await AiOpenPostAsync(
                    initializePayload.Convert2Json(true),
                    accessKey,
                    string.Empty,
                    timeout,
                    cancellationToken);

                if (!initializeResponse.success)
                {
                    string reason = $"初始化 HTTP {(int)initializeResponse.statusCode}: {initializeResponse.body}";
                    LogAiOpenFailure(content, reason, initializeResponse.body);
                    return SetAiOpenFailure(result, "fail", reason, TkSubCodeEnum.NetError);
                }

                if (string.IsNullOrEmpty(initializeResponse.sessionId))
                {
                    const string reason = "初始化响应缺少 Mcp-Session-Id";
                    LogAiOpenFailure(content, reason, initializeResponse.body);
                    return SetAiOpenFailure(result, "fail", reason, TkSubCodeEnum.Other);
                }

                var callPayload = new
                {
                    jsonrpc = "2.0",
                    id = $"call-{Guid.NewGuid():N}",
                    method = "tools/call",
                    @params = new
                    {
                        name = "entry",
                        arguments = new
                        {
                            arg0 = AiOpenSkillId,
                            arg1 = "query",
                            arg2 = AiOpenTqlId,
                            arg3 = new
                            {
                                material = content,
                                pid
                            }
                        }
                    }
                };

                var callResponse = await AiOpenPostAsync(
                    callPayload.Convert2Json(true),
                    accessKey,
                    initializeResponse.sessionId,
                    timeout,
                    cancellationToken);

                responseBody = callResponse.body;
                result.remote_response = responseBody;

                if (!callResponse.success)
                {
                    string reason = $"HTTP {(int)callResponse.statusCode}: {responseBody}";
                    LogAiOpenFailure(content, reason, responseBody);
                    return SetAiOpenFailure(result, "fail", reason, TkSubCodeEnum.NetError);
                }

                JsonElement rpc = GetAiOpenRpcJson(responseBody);
                string rpcError = rpc.PathRead("error.message", string.Empty);
                if (!string.IsNullOrEmpty(rpcError))
                {
                    LogAiOpenFailure(content, rpcError, responseBody);
                    return SetAiOpenFailure(result, "fail", rpcError, TkSubCodeEnum.Other);
                }

                string businessJson = rpc.PathRead("result.content[0].text", string.Empty);
                if (string.IsNullOrEmpty(businessJson))
                {
                    const string reason = "JSON-RPC 响应缺少业务数据";
                    LogAiOpenFailure(content, reason, responseBody);
                    return SetAiOpenFailure(result, "fail", reason, TkSubCodeEnum.Other);
                }

                JsonElement inner = businessJson.Convert2JsonElement();
                JsonElement data = inner.ElementRead("data");
                JsonElement business = data.ValueKind == JsonValueKind.Object
                    ? data.ElementRead("taokeMaterialUniversalLinkConvert")
                    : inner.ElementRead("taokeMaterialUniversalLinkConvert");

                // Error responses such as bizErrorCode=403 are returned directly in text,
                // rather than under data.taokeMaterialUniversalLinkConvert.
                if (business.ValueKind != JsonValueKind.Object && IsAiOpenBusinessPayload(inner))
                {
                    business = inner;
                }

                if (business.ValueKind != JsonValueKind.Object)
                {
                    string reason = ReadAiOpenErrorDescription(inner, "接口响应缺少转链结果");
                    LogAiOpenFailure(content, reason, responseBody);
                    return SetAiOpenFailure(result, "fail", reason, TkSubCodeEnum.Other);
                }

                bool success = business.Read<bool>("success", false);
                string message = business.Read("message", string.Empty);
                string businessReason = ReadAiOpenErrorDescription(business, message);
                if (!success)
                {
                    message = string.IsNullOrEmpty(message) ? "转链失败" : message;
                    businessReason = string.IsNullOrEmpty(businessReason) ? message : businessReason;

                    int bizErrorCode = business.Read("bizErrorCode", 0);
                    int resultCode = business.Read("resultCode", 0);
                    bool remoteDailyLimit = bizErrorCode == 403
                        && resultCode == 400
                        && businessReason.Contains("调用已达上限", StringComparison.Ordinal);

                    TkSubCodeEnum subCode = remoteDailyLimit
                        ? TkSubCodeEnum.RemoteDailyLimit
                        : businessReason.Contains("不支持", StringComparison.Ordinal)
                        || businessReason.Contains("商品ID", StringComparison.Ordinal)
                        || businessReason.Contains("有效推广链接", StringComparison.Ordinal)
                        ? TkSubCodeEnum.NoConvert
                        : TkSubCodeEnum.Other;

                    LogAiOpenFailure(content, businessReason, responseBody);
                    if (remoteDailyLimit && AiOpenRiskControlCore.IsApplicableAccount(_account))
                    {
                        await AiOpenRiskControlCore.RecordDailyLimitAndSuspendAsync(
                            _account,
                            businessReason,
                            bizErrorCode,
                            resultCode);
                    }

                    return SetAiOpenFailure(result, message, businessReason, subCode);
                }

                string cpsShortUrl = business.Read("cpsShortUrl", string.Empty);
                string cpsLongUrl = business.Read("cpsLongUrl", string.Empty);
                string cpsShortTpwd = business.Read("cpsShortTpwd", string.Empty);
                string cpsFullTpwd = business.Read("cpsFullTpwd", string.Empty);
                string couponShortUrl = business.Read("couponShortUrl", string.Empty);
                string couponLongUrl = business.Read("couponLongUrl", string.Empty);
                string couponShortTpwd = business.Read("couponShortTpwd", string.Empty);
                string couponFullTpwd = business.Read("couponFullTpwd", string.Empty);

                string cpsUrl = string.IsNullOrEmpty(cpsShortUrl) ? cpsLongUrl : cpsShortUrl;
                string couponUrl = string.IsNullOrEmpty(couponShortUrl) ? couponLongUrl : couponShortUrl;
                string shortLinkurl = _account.useCouponLinkFirst ? couponUrl : cpsUrl;
                if (string.IsNullOrEmpty(shortLinkurl))
                {
                    shortLinkurl = _account.useCouponLinkFirst ? cpsUrl : couponUrl;
                }

                if (string.IsNullOrEmpty(shortLinkurl))
                {
                    const string reason = "转链结果缺少有效推广链接";
                    LogAiOpenFailure(content, reason, responseBody);
                    return SetAiOpenFailure(result, reason, reason, TkSubCodeEnum.NoConvert);
                }

                string fullTpwd = _account.useCouponLinkFirst ? couponFullTpwd : cpsFullTpwd;
                string shortTpwd = _account.useCouponLinkFirst ? couponShortTpwd : cpsShortTpwd;
                if (string.IsNullOrEmpty(fullTpwd))
                {
                    fullTpwd = _account.useCouponLinkFirst ? cpsFullTpwd : couponFullTpwd;
                }
                if (string.IsNullOrEmpty(shortTpwd))
                {
                    shortTpwd = _account.useCouponLinkFirst ? cpsShortTpwd : couponShortTpwd;
                }

                result.success = true;
                result.message = string.Empty;
                result.reason = string.Empty;
                result.subCode = TkSubCodeEnum.Success;
                result.content = ReplaceUrls(content, shortLinkurl);
                result.shortLinkurl = shortLinkurl;
                result.deeplink_url = GetDeeplink(shortLinkurl);
                result.taoToken = string.IsNullOrEmpty(fullTpwd)
                    ? $"{shortTpwd} {shortLinkurl}".Trim()
                    : fullTpwd;
                result.item_url = string.IsNullOrEmpty(cpsUrl) ? shortLinkurl : cpsUrl;
                result.item_deeplink_url = GetDeeplink(result.item_url);
                result.itemId = ExtractItemId(content) ?? result.itemId;


                result.pic = _config.tk_parse_default_icon;
                // "http://doc.molilian.com/20260817142801_2822_122.png?x-oss-process=image/resize,w_200";

                // 完整淘口令格式：m.tb.cn 链接 + 商品标题 + 两位字母和 3~4 位数字。
                Match titleMatch = Regex.Match(
                    fullTpwd,
                    @"https?://m\.tb\.cn/\S+\s+(?<title>.+?)\s+[A-Za-z]{2}\d{3,4}\s*$",
                    RegexOptions.IgnoreCase);
                if (titleMatch.Success)
                {
                    result.itemName = titleMatch.Groups["title"].Value.Trim();
                }

                switch (result.link_type)
                {
                    case LinkTypeEnum.profile:
                    case LinkTypeEnum.goods:
                    case LinkTypeEnum.video:
                    case LinkTypeEnum.live:
                        break;
                    default:
                        result.link_type = LinkTypeEnum.goods;
                        break;
                }

                return result;
            }
            catch (OperationCanceledException) when (cancellationToken.IsCancellationRequested)
            {
                throw;
            }
            catch (Exception ex)
            {
                string reason = $"上游接口异常: {ex.Message}";
                LogAiOpenFailure(content, reason, responseBody);
                return SetAiOpenFailure(result, "fail", reason, TkSubCodeEnum.NetError);
            }
            finally
            {
                stopwatch.Stop();
                result.elapsedTime3 = (int)stopwatch.ElapsedMilliseconds;
            }
        }

        private async Task<(bool success, HttpStatusCode statusCode, string body, string sessionId)> AiOpenPostAsync(
            string post,
            string accessKey,
            string sessionId,
            TimeSpan timeout,
            CancellationToken cancellationToken)
        {
            var client = new WebClientUtility()
                .SetContentType("application/json")
                .AddHeaders("Accept", "application/json, text/event-stream")
                .AddHeaders("Authorization", $"Bearer {accessKey}");

            if (!string.IsNullOrEmpty(sessionId))
            {
                client.AddHeaders("Mcp-Session-Id", sessionId);
            }

            client.Proxy = _proxy;
            client.Timeout = timeout;
            if (!string.IsNullOrEmpty(_user_agent)) client.UserAgent = _user_agent;

            var response = await client.Post(post).RequestAsync(AiOpenMcpUrl, "POST", cancellationToken);
            if (response.ResponseMessage == null)
            {
                throw response.ResponseException ?? new Exception("上游接口未返回 HTTP 响应");
            }

            string body = response.Body();
            string responseSessionId = response.ResponseMessage.Headers.TryGetValues("Mcp-Session-Id", out IEnumerable<string>? values)
                ? values.FirstOrDefault() ?? string.Empty
                : string.Empty;

            bool success = response.Successed
                && (int)response.ResponseMessage.StatusCode is >= 200 and <= 299;
            return (success, response.ResponseMessage.StatusCode, body, responseSessionId);
        }

        private static JsonElement GetAiOpenRpcJson(string body)
        {
            string json = body.Trim();
            if (!json.StartsWith('{'))
            {
                json = body.Split('\n')
                    .Select(line => line.Trim())
                    .Where(line => line.StartsWith("data:", StringComparison.Ordinal))
                    .Select(line => line[5..].Trim())
                    .LastOrDefault(value => value.StartsWith('{')) ?? string.Empty;
            }

            if (string.IsNullOrEmpty(json))
            {
                throw new JsonException("响应中没有可解析的 JSON-RPC data");
            }

            return json.Convert2JsonElement();
        }

        private static TkDataDTO SetAiOpenFailure(
            TkDataDTO result,
            string message,
            string reason,
            TkSubCodeEnum subCode)
        {
            result.channel = TkChannelEnum.tb;
            result.link_type = LinkTypeEnum.unknown;
            result.success = false;
            result.message = message;
            result.reason = reason;
            result.subCode = subCode;
            return result;
        }

        private static bool IsAiOpenBusinessPayload(JsonElement value)
        {
            return value.ValueKind == JsonValueKind.Object
                && (value.TryGetProperty("success", out _)
                    || value.TryGetProperty("bizErrorCode", out _)
                    || value.TryGetProperty("resultCode", out _));
        }

        private static string ReadAiOpenErrorDescription(JsonElement value, string fallback)
        {
            string description = value.Read("bizErrorDesc", string.Empty);
            if (!string.IsNullOrWhiteSpace(description))
            {
                return description.Trim();
            }

            string message = value.Read("message", string.Empty);
            return string.IsNullOrWhiteSpace(message) ? fallback : message.Trim();
        }

        private static void LogAiOpenFailure(string content, string reason, string body)
        {
            if (string.IsNullOrEmpty(body))
            {
                _ = new LoggerLibrary("endpoint", "aiopen")
                    .Info(content, reason)
                    .SaveAsync();
                return;
            }

            _ = new LoggerLibrary("endpoint", "aiopen")
                .Info(content, reason)
                .Info("response", body)
                .SaveAsync();
        }
    }
}