using Newtonsoft.Json;
using System.Globalization;
using System.Linq;
using System.Net.Http.Headers;
using System.Text;
using VOL.Core.Services;
using VOL.DingTalk.Models;
using VOL.DingTalk.Models.Biz;
using static VOL.DingTalk.Util;

namespace VOL.DingTalk.Services.Biz
{
    public class DingTalkService
    {
        private const string DepartmentSubUrl = "https://oapi.dingtalk.com/topapi/v2/department/listsub";
        private const string RosterUrl = "https://api.dingtalk.com/v1.0/hrm/rosters/lists/query";
        private const string UpdateEmployeeUrl = "https://oapi.dingtalk.com/topapi/smartwork/hrm/employee/v2/update";

        private const string UserListIdUrl = "https://oapi.dingtalk.com/topapi/user/listid";
        private const string CreateDept = "https://oapi.dingtalk.com/topapi/v2/department/create";

        private const string UpdateEmpInfoUrl = "https://oapi.dingtalk.com/topapi/v2/user/update";
        // 需要获取的花名册字段代码
        private readonly List<string> _fieldCodes =
            [
                "sys00-name",        // 姓名
                "sys00-email",       // 邮箱
                "sys00-mobile",      // 手机号
                "sys02-certNo",      // 证件号码
                "sys02-birthTime",   // 出生日期
                "sys02-sexType",     // 性别
                "sys00-dept",        // 部门
                "sys00-jobNumber",    // 工号 
                "sys00-reportManager",  // 直接主管
                "sys00-position"  // 职位
            ];

        private readonly SemaphoreSlim _tokenLock = new SemaphoreSlim(1, 1);
        // 钉钉API地址
        private readonly string _tokenUrl;

        private DingTalkConfig _config;
        private SystemToken _token;
        public DingTalkService(SystemToken token, DingTalkConfig config)
        {
            _token = token;
            _config = config;
            //Init();
            _tokenUrl = $"https://api.dingtalk.com/v1.0/oauth2/{_config.CorpId}/token";
        }
        public List<Dictionary<string, string>> ExtractEmployeeData(List<Dictionary<string, object>> rosterData)
        {
            var employees = new List<Dictionary<string, string>>();

            foreach (var userData in rosterData)
            {
                var emp = new Dictionary<string, string> { { "userid", userData["userId"].ToString() } };

                var fieldDataList = (Newtonsoft.Json.Linq.JArray)userData["fieldDataList"];

                foreach (Newtonsoft.Json.Linq.JObject field in fieldDataList)
                {
                    string fieldCode = field["fieldCode"].ToString();
                    string fieldValue = "";

                    var fieldValueList = (Newtonsoft.Json.Linq.JArray)field["fieldValueList"];
                    if (fieldValueList != null && fieldValueList.Count > 0)
                    {
                        // 处理部门信息
                        if (fieldCode == "sys00-dept")
                        {
                            // 部门可能有多个，取第一个
                            fieldValue = field["fieldValueList"][0]["label"].ToString();
                        }
                        else
                        {
                            fieldValue = field["fieldValueList"][0]["label"].ToString();
                        }
                    }

                    // 映射字段到中文名
                    switch (fieldCode)
                    {
                        case "sys00-name":
                            emp["姓名"] = fieldValue;
                            break;

                        case "sys00-email":
                            emp["邮箱"] = fieldValue;
                            break;

                        case "sys00-dept":
                            emp["部门"] = fieldValue;
                            break;

                        case "sys00-mobile":
                            emp["手机号"] = fieldValue;
                            break;

                        case "sys02-certNo":
                            emp["证件号码"] = fieldValue;
                            break;

                        case "sys02-birthTime":
                            emp["出生日期"] = fieldValue;
                            break;

                        case "sys02-sexType":
                            emp["性别"] = fieldValue;
                            break;

                        case "sys00-jobNumber":
                            emp["工号"] = fieldValue;
                            break;
                    }
                }

                employees.Add(emp);
            }

            return employees;
        }

        public async Task<List<DingTalkEmployee>> GetAllEmployeesAsync()
        {
            DateTime startTime = DateTime.Now;

            //Logger.Info("正在获取钉钉访问凭证...");
            var accessToken = await GetValidTokenAsync();
            if (accessToken == null)
            {
                return new List<DingTalkEmployee>();
            }

            //Logger.Info("正在获取部门结构...");
            var departments = await GetSubDepartmentsAsync();
            //Logger.Info($"共获取到 {departments.Count} 个部门");

            HashSet<string> allUserIds = new HashSet<string>();
            //Logger.Info("正在获取部门用户列表...");
            foreach (var dept in departments)
            {
                var userIds = await GetDeptUserIdsAsync(Convert.ToInt64(dept.dept_id));
                if(userIds != null)
                {
                    allUserIds.UnionWith(userIds);
                }
                //Logger.Info($"部门 {dept.name} 有 {userIds.Count} 个用户");
            }

            List<string> userIdList = allUserIds.ToList();
            //Logger.Info($"共获取到 {userIdList.Count} 个用户");

            // 分批处理用户（每批100人）
            var allEmployees = new List<DingTalkEmployee>();
            int batchSize = 100;
            for (int i = 0; i < userIdList.Count; i += batchSize)
            {
                var batch = userIdList.GetRange(i, Math.Min(batchSize, userIdList.Count - i));
                //Logger.Info($"正在处理用户批次 {i / batchSize + 1}/{(userIdList.Count - 1) / batchSize + 1}");

                var rosterData = await GetRosterInfoAsync(batch);
                allEmployees.AddRange([.. rosterData.Select(DingTalkEmployee.TranFrom)]);
            }

            //Logger.Info($"成功获取 {allEmployees.Count} 名员工信息");
            //Logger.Info($"钉钉数据获取完成，耗时: {DateTime.Now.Subtract(startTime).TotalSeconds:.2f}秒");

            return allEmployees;
        }

        public async Task<List<string>> GetDeptUserIdsAsync(long deptId)
        {
            var accessToken = await GetValidTokenAsync();
            if (accessToken == null)
            {
                return new List<string>();
            }

            var payload = new Dictionary<string, object> { { "dept_id", deptId } };
            var queryParams = new Dictionary<string, string> { { "access_token", accessToken } };

            try
            { 
                var data = await HttpUtil.SendPostRequest<DingTalkResponse<EmployeeQuery>>(UserListIdUrl, queryParams, JsonConvert.SerializeObject(payload));
                if (data.errcode == 0)
                {
                    return data.result.userid_list;
                }
                else
                {
                    return null;
                }
            }
            catch (HttpRequestException ex)
            {
                Logger.Error($"获取部门用户失败: {ex.Message}");
                return new List<string>();
            }
        }

        public async Task<List<DingTalkEmployeeRsp>> GetRosterInfoAsync(List<string> userIds)
        {
            var accessToken = await GetValidTokenAsync();
            if (accessToken == null)
            {
                return new List<DingTalkEmployeeRsp>();
            }

            var headers = new Dictionary<string, string>
        {
            { "x-acs-dingtalk-access-token", accessToken },
            //{ "Content-Type", "application/json" }
        };

            var payload = new Dictionary<string, object>
        {
            { "userIdList", userIds },
            { "fieldFilterList", _fieldCodes },
            { "appAgentId", _config.AgentId },
            { "text2SelectConvert", true }
        };

            try
            {
                using (var client = new HttpClient())
                {
                    client.DefaultRequestHeaders.Clear();
                    foreach (var header in headers)
                    {
                        client.DefaultRequestHeaders.Add(header.Key, header.Value);
                    }

                    var jsonPayload = JsonConvert.SerializeObject(payload);
                    var content = new StringContent(jsonPayload, Encoding.UTF8, "application/json");

                    var response = await client.PostAsync(RosterUrl, content);
                    response.EnsureSuccessStatusCode();
                    var responseContent = await response.Content.ReadAsStringAsync();
                    //var data = JsonConvert.DeserializeObject<Dictionary<string, object>>(responseContent);
                    //return ((Newtonsoft.Json.Linq.JArray)data["result"]).ToObject<List<DingTalkEmployeeRsp>>();
                    var rspResult = JsonConvert.DeserializeObject<DingTalkResponse<List<DingTalkEmployeeRsp>>>(responseContent);
                    return rspResult.result;
                }
            }
            catch (HttpRequestException ex)
            {
                Logger.Error($"获取花名册失败: {ex.Message}");
                return new List<DingTalkEmployeeRsp>();
            }
        }

        public async Task<List<DingTalkDepartment>> GetSubDepartmentsAsync(long parentId = 1)
        {
            var accessToken = await GetValidTokenAsync();
            if (accessToken == null)
            {
                return new List<DingTalkDepartment>();
            }

            var departments = new List<DingTalkDepartment>();
            var payload = new Dictionary<string, object> { { "dept_id", parentId } };
            var queryParams = new Dictionary<string, string> { { "access_token", accessToken } };

            try
            {

                var data = await HttpUtil.SendPostRequest<DingTalkResponse<List<DingTalkDepartment>>>(DepartmentSubUrl, queryParams, JsonConvert.SerializeObject(payload));

                    if (data.errcode == 0)
                    {
                        foreach (var dept in data.result)
                        {
                            departments.Add(dept);

                            await Task.Delay(100); // 间隔时间，避免请求过快
                            // 递归获取子部门
                            departments.AddRange(await GetSubDepartmentsAsync(dept.dept_id));
                        }
                    }
                    return departments;
                
            }
            catch (HttpRequestException ex)
            {
                Logger.Error($"获取部门列表失败: {ex.Message}");
                return new List<DingTalkDepartment>();
            }
        }

        public async Task<string> GetValidTokenAsync()
        {
            await _tokenLock.WaitAsync();
            try
            {
                // 如果token不存在或已过期，重新获取
                if (_token.IsTokenExpiry())
                {
                    Logger.Info("钉钉access_token已过期，重新获取...");
                    var token = await GetAccessTokenAsync();
                    if (token != null)
                    {
                        _token.Token = token;
                        // 钉钉token有效期为7200秒，提前300秒刷新
                        _token.TokenExpiry = 6900;
                    }
                    else
                    {
                        Logger.Error("无法获取有效的钉钉access_token");
                        return null;
                    }
                }
                return _token.Token;
            }
            finally
            {
                _tokenLock.Release();
            }
        }

        public async Task<bool> UpdateEmployeeAsync(string userId, Dictionary<string, Dictionary<string, string>> fieldUpdates)
        {
            var accessToken = await GetValidTokenAsync();
            if (accessToken == null)
            {
                return false;
            }

            // 构建更新参数 - 根据API文档调整结构
            var groups = new List<Dictionary<string, object>>();
            foreach (var groupId in fieldUpdates.Keys)
            {
                var fields = fieldUpdates[groupId];
                var fieldList = new List<Dictionary<string, object>>();
                foreach (var fieldCode in fields.Keys)
                {
                    string value = fields[fieldCode];
                    // 处理特殊字段类型
                    object processedValue = value;

                    // 日期字段需要特殊处理
                    if (fieldCode == "sys02-birthTime" && !string.IsNullOrEmpty(value))
                    {
                        // 确保日期格式正确
                        processedValue = FormatDate(value);
                    }

                    // 性别字段需要转换
                    if (fieldCode == "sys02-sexType")
                    {
                        processedValue = ConvertGenderForDingTalk(value);
                    }

                    fieldList.Add(new Dictionary<string, object>
                {
                    { "field_code", fieldCode },
                    { "value", processedValue }
                });
                }

                groups.Add(new Dictionary<string, object>
            {
                { "group_id", groupId },
                {
                    "sections", new List<Dictionary<string, object>>
                    {
                        new Dictionary<string, object>
                        {
                            { "section", fieldList }
                        }
                    }
                }
            });
            }

            var queryParams = new Dictionary<string, string> { { "access_token", accessToken } };
            var payload = new Dictionary<string, object>
        {
            { "agentid", _config.AgentId },
            {
                "param", new Dictionary<string, object>
                {
                    { "userid", userId },
                    { "groups", groups }
                }
            }
        };

            try
            {
                Logger.Info($"钉钉更新请求: {JsonConvert.SerializeObject(payload, Formatting.None)}");

                using (var client = new HttpClient())
                {
                    var uriBuilder = new UriBuilder(UpdateEmployeeUrl);
                    uriBuilder.Query = string.Join("&", queryParams.Select(kvp => $"{kvp.Key}={kvp.Value}"));

                    var jsonPayload = JsonConvert.SerializeObject(payload);
                    var content = new StringContent(jsonPayload, Encoding.UTF8, "application/json");

                    var response = await client.PostAsync(uriBuilder.Uri, content);
                    Logger.Info($"钉钉更新响应状态: {response.StatusCode}");
                    Logger.Info($"钉钉更新响应内容: {await response.Content.ReadAsStringAsync()}");

                    response.EnsureSuccessStatusCode();
                    var responseContent = await response.Content.ReadAsStringAsync();
                    var data = JsonConvert.DeserializeObject<Dictionary<string, object>>(responseContent);

                    // 根据钉钉API文档检查响应
                    if (Convert.ToInt32(data.GetValueOrDefault("errcode", -1)) == 0 &&
                        Convert.ToBoolean(data.GetValueOrDefault("result", false)) &&
                        Convert.ToBoolean(data.GetValueOrDefault("success", false)))
                    {
                        Logger.Info($"员工 {userId} 更新成功");
                        return true;
                    }
                    else
                    {
                        string errorMsg = data.GetValueOrDefault("errmsg", "未知错误")?.ToString();
                        Logger.Error($"员工更新失败: {errorMsg}");
                        return false;
                    }
                }
            }
            catch (HttpRequestException ex)
            {
                Logger.Error($"更新员工信息失败: {ex.Message}");
                return false;
            }
        }

        private string ConvertGenderForDingTalk(string gender)
        {
            if (gender == "男")
            {
                return "1";
            }
            else if (gender == "女")
            {
                return "2";
            }
            else
            {
                return gender;
            }
        }

        private string FormatDate(string dateStr)
        {
            try
            {
                // 尝试解析各种日期格式
                if (!string.IsNullOrEmpty(dateStr))
                {
                    // 移除时间部分（如果有）
                    if (dateStr.Contains(" "))
                    {
                        dateStr = dateStr.Split(" ")[0];
                    }

                    // 尝试解析常见日期格式
                    foreach (string fmt in new string[] { "yyyy-MM-dd", "yyyy/MM/dd", "yyyy.MM.dd", "yyyy年MM月dd日" })
                    {
                        if (DateTime.TryParseExact(dateStr, fmt, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateTime dateObj))
                        {
                            return dateObj.ToString("yyyy-MM-dd");
                        }
                    }
                }

                return dateStr;
            }
            catch
            {
                return dateStr;
            }
        }

        private async Task<string> GetAccessTokenAsync()
        {
            var payload = new Dictionary<string, string>
        {
            { "client_id", _config.AppKey },
            { "client_secret", _config.AppSecret },
            { "grant_type", "client_credentials" }
        };

            //using (var client = new HttpClient())
            //{
            //    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
            //    var jsonPayload = JsonConvert.SerializeObject(payload);
            //    var content = new StringContent(jsonPayload, Encoding.UTF8, "application/json");

            //    try
            //    {
            //        var response = await client.PostAsync(_tokenUrl, content);
            //        response.EnsureSuccessStatusCode();
            //        var responseContent = await response.Content.ReadAsStringAsync();
            //        var data = JsonConvert.DeserializeObject<Dictionary<string, string>>(responseContent);
            //        return data["access_token"];
            //    }
            //    catch (HttpRequestException ex)
            //    {
            //        Logger.Error($"获取access_token失败: {ex.Message}");
            //        return null;
            //    }
            //}
            try
            {
                var data = await HttpUtil.SendPostRequest<Dictionary<string, string>>(_tokenUrl, new Dictionary<string, string>(), JsonConvert.SerializeObject(payload));
                return data["access_token"];
            }
            catch (HttpRequestException ex)
            {
                Logger.Error($"获取access_token失败: {ex.Message}");
                return null;
            }
        }



        public void CreateDingTalkDept(DingTalkDepartment dept)
        {
            var accessToken =  GetValidTokenAsync().Result;
            if (accessToken == null)
            {
                //return new List<DingTalkEmployee>();
                throw new Exception("Token 失效");
            }

            var departments = new List<DingTalkDepartment>();
            var payload = new Dictionary<string, object> {
                {"name", dept.name } ,
                {"parent_id", dept.parent_id } ,
            };
            var queryParams = new Dictionary<string, string> { { "access_token", accessToken } };

            try
            {
                using (var client = new HttpClient())
                {
                    var jsonPayload = JsonConvert.SerializeObject(payload);
                    var content = new StringContent(jsonPayload, Encoding.UTF8, "application/json");
                    var uriBuilder = new UriBuilder(CreateDept);
                    uriBuilder.Query = string.Join("&", queryParams.Select(kvp => $"{kvp.Key}={kvp.Value}"));

                    var response = client.PostAsync(uriBuilder.Uri, content).Result;
                    response.EnsureSuccessStatusCode();
                    var responseContent =  response.Content.ReadAsStringAsync().Result;
                    var data = JsonConvert.DeserializeObject<DingTalkResponse<Dictionary<string,object>>>(responseContent);

                    if(data.errcode != 0)
                    {
                        Logger.Error($"{data.errcode},{data.errmsg}");
                        throw new Exception($"{data.errcode},{data.errmsg}");
                    }
                    
                }
            }catch(Exception)
            {
                throw;
            }
        }


        public async Task<bool> UpdateEmpInfo(DingTalkEmployeeUpdate updateInfo)
        {
            if(updateInfo == null || string.IsNullOrEmpty( updateInfo.userid))
            {
                throw new Exception("参数错误");
            }

            var accessToken = await GetValidTokenAsync();
            if (accessToken == null)
            {
                return false;
            }
             
            var queryParams = new Dictionary<string, string> { { "access_token", accessToken } };

            try
            {

                var data = await HttpUtil.SendPostRequest<DingTalkResponse<object>>(UpdateEmpInfoUrl, queryParams, JsonConvert.SerializeObject(updateInfo, new JsonSerializerSettings { NullValueHandling = NullValueHandling.Ignore }));
                if(data.errcode != 0)
                {
                    Logger.Error($"{data.errcode},{data.errmsg}");
                    throw new Exception($"{data.errcode},{data.errmsg}");
                }

                //using (var client = new HttpClient())
                //{
                //    var jsonPayload = JsonConvert.SerializeObject(updateInfo, new JsonSerializerSettings { NullValueHandling = NullValueHandling.Ignore });
                //    var content = new StringContent(jsonPayload, Encoding.UTF8, "application/json");
                //    var uriBuilder = new UriBuilder(UpdateEmpInfoUrl);
                //    uriBuilder.Query = string.Join("&", queryParams.Select(kvp => $"{kvp.Key}={kvp.Value}"));

                //    var response = await client.PostAsync(uriBuilder.Uri, content);
                //    response.EnsureSuccessStatusCode();
                //    var responseContent = await response.Content.ReadAsStringAsync();
                //    var data = JsonConvert.DeserializeObject<DingTalkResponse<object>>(responseContent);

                //    if(data.errcode != 0)
                //    {
                //        Logger.Error($"{data.errcode},{data.errmsg}");
                //        throw new Exception($"{data.errcode},{data.errmsg}");
                //    }
                //}
            }
            catch (HttpRequestException ex)
            {
                Logger.Error($"获取部门列表失败: {ex.Message}");
                throw new Exception($"获取部门列表失败: {ex.Message}");
            }

            return true;
        }
    }
}