using JLHHJSvr.BLL;
using JLHHJSvr.Com.Model;
using JLHHJSvr.LJException;
using Newtonsoft.Json.Linq;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace JLHHJSvr.Helper
{
    internal class ERPHelper : HelperBase
    {
        private JObject BuildLoginRequest()
        {
            return new JObject
            {
                { "token", GlobalVar.ERP_TOKEN },
                { "account", GlobalVar.ERP_ACCOUNT_NAME },
                { "userid", GlobalVar.ERP_ACCOUNT_USERNAME },
                { "password", GlobalVar.ERP_ACCOUNT_PASSWORD },
                { "clientType", 30 }
            };
        }
        private static readonly Dictionary<string, string> _apiResultMap = new Dictionary<string, string>()
        {
            {"GetL1Mtrldef", "mtrldefList"},
            {"GetSCWorkgroupList", "scworkgroupList"},
            {"GetL1Mtrltype", "mtrltypeList"},
            {"GetL1ConfigureCode", "resultList"},
            {"CommonDynamicSelect", "datatable"},
        };
        protected void Login()
        {
            var request = BuildLoginRequest();

            try
            {
                var result = DoExecute("Login", request);
                var token = result.GetValue("token").ToObject<string>();

                if (!string.IsNullOrEmpty(token))
                {
                    GlobalVar.ERP_TOKEN = token;
                }
            }
            catch (Exception ex)
            {
                throw new LJCommonException($"ERP登录失败: {ex.Message}");
            }
        }
        public void CheckLogin()
        {
            if(string.IsNullOrEmpty(GlobalVar.ERP_TOKEN))
            {
                Login();
            }
        }
        public List<T> GetERPList<T>(string apiMethod, JObject parameters = null, int tryCnt = 0)
        {
            CheckLogin();

            try
            {
                var request = BuildRequest(parameters);
                var result = DoExecute(apiMethod, request);

                if (!_apiResultMap.TryGetValue(apiMethod, out var listKey)) throw new ArgumentException($"Unsupported API Method: {apiMethod}");

                return result[listKey]?.ToObject<List<T>>() ?? new List<T>();
            }
            catch (Exception ex) when (IsTokenExpired(ex))
            {
                if (tryCnt >= 3) throw new LJCommonException("超过最大重连次数，请检查连接！");

                Login();
                return GetERPList<T>(apiMethod, parameters, tryCnt + 1);
            }
            catch
            {
                throw; 
            }
        }
        // 提取请求构建逻辑
        private JObject BuildRequest(JObject parameters)
        {
            var request = new JObject { ["token"] = GlobalVar.ERP_TOKEN };
            parameters = parameters ?? new JObject();

            foreach (var param in parameters)
            {
                request.Add(param.Key, param.Value);
            }
            return request;
        }
        private bool IsTokenExpired(Exception ex)
        {
            const string expiredFlag = "已与服务器失联";
            return ex.Message.Contains(expiredFlag);
        }
    }
}