using DS.Module.Core;
using DS.Module.Core.Extensions;
using DS.Module.Core.Helpers;
using DS.WMS.Core.Fee.Dtos;
using DS.WMS.Core.Flow.Dtos;
using DS.WMS.Core.Flow.Entity;
using DS.WMS.Core.Flow.Interface;
using DS.WMS.Core.Flow.Method;
using DS.WMS.Core.Op.Dtos.TaskInteraction;
using DS.WMS.Core.Op.Entity;
using DS.WMS.Core.Op.Entity.TaskInteraction;
using DS.WMS.Core.Op.Interface.TaskInteraction;
using DS.WMS.Core.Sys.Entity;
using DS.WMS.Core.TaskPlat.Dtos;
using DS.WMS.Core.TaskPlat.Interface;
using Masuit.Tools.Systems;
using Microsoft.Extensions.DependencyInjection;
using SqlSugar;

namespace DS.WMS.Core.Op.Method.TaskInteraction
{
    /// <summary>
    /// 任务交互服务
    /// </summary>
    public abstract class TaskService : ServiceBase, ITaskService
    {
        const long PERMISSION_ID = 1815294400855674880;

        /// <summary>
        /// 任务管理服务
        /// </summary>
        protected ITaskManageService ManagerService { get; private set; }

        /// <summary>
        /// 工作流服务
        /// </summary>
        protected Lazy<IClientFlowInstanceService> FlowService { get; private set; }

        /// <summary>
        /// 初始化
        /// </summary>
        /// <param name="provider"></param>
        protected TaskService(IServiceProvider provider) : base(provider)
        {
            ManagerService = provider.GetRequiredService<ITaskManageService>();
            FlowService = new Lazy<IClientFlowInstanceService>(provider.GetRequiredService<IClientFlowInstanceService>());
        }

        /// <summary>
        /// 获取给定任务的下一任务类型
        /// </summary>
        /// <param name="current">任务信息</param>
        /// <returns></returns>
        internal static TaskBaseTypeEnum? GetNextType(BusinessTask current)
        {
            if (current.TaskType == TaskBaseTypeEnum.WAIT_CHECKOUT_BILL) //流程的最后一步
                return null;

            int currentTypeVal = (int)current.TaskType;
            if (currentTypeVal >= 300) //300开始的枚举值为可选服务项目，不存在前后关联性
                return null;

            return (TaskBaseTypeEnum)(currentTypeVal + 1);
        }

        /// <summary>
        /// 确保任务交互模块已授权
        /// </summary>
        /// <returns></returns>
        protected virtual async Task<bool> EnsureModuleAuthorized()
        {
            //if (!await Db.Queryable<SysPermissionTenant>().AnyAsync(x => x.PermissionId == PERMISSION_ID))
            //    return false;

            long tid = long.Parse(User.TenantId);
            var authStr = await Db.Queryable<SysTenantPermissionAuth>().Where(x => x.PermissionId == PERMISSION_ID && x.TenantId == tid &&
                SqlFunc.Subqueryable<SysPermissionTenant>().Where(spt => spt.PermissionId == x.PermissionId).Any())
                .Select(x => x.AuthNum).FirstAsync();
            if (authStr.IsNullOrEmpty())
                return false;

            var appSecret = await Db.Queryable<SysTenant>().Where(x => x.Id == tid).Select(x => x.AppSecret).FirstAsync();
            return int.TryParse(EncrypteHelper.DecryptData(authStr, appSecret), out int authNum) && authNum > 0;
        }

        /// <summary>
        /// 发起任务审核
        /// </summary>
        /// <param name="request"></param>
        /// <returns></returns>
        public async Task<DataResult> SubmitAuditAsync(TaskRequest request)
        {
            var task = await GetQuery(request.BusinessId, request.BusinessType, TaskBaseTypeEnum.WAIT_ORDER_AUDIT).FirstAsync();
            if (task == null)
                return DataResult.FailedWithDesc(nameof(MultiLanguageConst.EmptyData));

            if (task.TaskStatus == TaskStatusEnum.Complete)
                return DataResult.FailedWithDesc(nameof(MultiLanguageConst.TaskCompleted));

            if (task.TaskStatus == TaskStatusEnum.Pending || task.TaskStatus == TaskStatusEnum.Create)
            {
                //创建&启动工作流
                var result = await Create_StartWorkflow(task);
                if (!result.Succeeded)
                    return result;

                if (task.TaskStatus != TaskStatusEnum.Create)
                {
                    await TenantDb.Updateable<BusinessTask>().SetColumns(x => x.TaskStatus == TaskStatusEnum.Create)
                    .Where(x => x.BusinessId == request.BusinessId &&
                    x.BusinessType == request.BusinessType && x.TaskType == TaskBaseTypeEnum.WAIT_ORDER_AUDIT)
                    .ExecuteCommandAsync();
                }                

                return result;
            }

            return DataResult.FailedWithDesc(nameof(MultiLanguageConst.TaskStatusNotSupported));
        }

        /// <summary>
        /// 任务审核
        /// </summary>
        /// <param name="request"></param>
        /// <returns></returns>
        public async Task<DataResult> AuditAsync(AuditRequest request)
        {
            long id = request.Ids[0];
            var task = await GetQuery(id, request.BusinessType.Value, TaskBaseTypeEnum.WAIT_ORDER_AUDIT).FirstAsync();
            if (task == null)
                return DataResult.FailedWithDesc(nameof(MultiLanguageConst.EmptyData));

            if (task.TaskStatus == TaskStatusEnum.Complete)
            {
                return DataResult.FailedWithDesc(nameof(MultiLanguageConst.TaskCompleted));
            }
            else if (task.TaskStatus != TaskStatusEnum.Create && task.TaskStatus != TaskStatusEnum.Pending)
            {
                return DataResult.FailedWithDesc(nameof(MultiLanguageConst.TaskAuditStatusError));
            }

            if (task.FlowId == null)
                return DataResult.FailedWithDesc(nameof(MultiLanguageConst.FlowNotFound));

            return FlowService.Value.AuditFlowInstance(new FlowAuditInfo
            {
                AuditNote = request.Remark,
                Status = request.Result,
                Instance = await Db.Queryable<FlowInstance>().FirstAsync(x => x.Id == task.FlowId.Value)
            });
        }

        /// <summary>
        /// 创建关联任务
        /// </summary>
        /// <param name="request"></param>
        /// <param name="useTransaction">是否使用事务</param>
        /// <returns></returns>
        public async Task<DataResult> CreateTaskAsync(TaskCreationRequest request, bool useTransaction = true)
        {
            if (!await EnsureModuleAuthorized())
                return DataResult.SuccessedWithDesc(nameof(MultiLanguageConst.ModuleUnauthorized));

            var task = await GetQuery(request.BusinessId, request.BusinessType, request.TaskType).FirstAsync();
            if (task != null && task.TaskStatus != TaskStatusEnum.Cancel)
                return DataResult.FailedWithDesc(nameof(MultiLanguageConst.TaskExists));

            long tenatId = long.Parse(User.TenantId);
            string tenatName = Db.Queryable<SysTenant>().Where(x => x.Id == tenatId).Select(x => x.Name).First();
            var info = new TaskManageOrderMessageInfo
            {
                Head = new TaskManageOrderMessageHeadInfo
                {
                    GID = Guid.NewGuid().ToString(),
                    BSNO = request.BusinessId,
                    MessageType = "WORK_FLOW_TASK",
                    SenderId = "WorkFlow",
                    SenderName = "工作流平台",
                    ReceiverId = "TaskManage",
                    ReceiverName = "任务管理平台",
                    Version = "1.0",
                    RequestDate = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"),
                    RequestAction = "Add"
                },
                Main = new TaskManageOrderMessageMainInfo
                {
                    TaskType = request.TaskType,
                    TaskSource = TaskSourceEnum.WORK_FLOW,
                    TaskTitle = request.TaskTitle,
                    TaskDesp = request.TaskDescription,
                    TaskUserId = User.UserId,
                    TaskUserName = User.UserName,
                    TaskTenatId = tenatId,
                    TaskTenatName = tenatName
                }
            };

            if (request.RecvUserIdList == null || request.RecvUserIdList.Length == 0)
            {
                info.Main.RecvUserInfoList = [new RecvUserInfo { RecvUserId = long.Parse(User.UserId), RecvUserName = User.UserName }];
            }
            else
            {
                info.Main.RecvUserInfoList = await GetRecvUsers(request.RecvUserIdList);
            }

            if (info.Main.TaskTitle.IsNullOrEmpty())
            {
                var biz = await TenantDb.Queryable<SeaExport>().Select(x => new
                {
                    x.Id,
                    x.MBLNO,
                    x.Vessel,
                    x.Voyno,
                    x.ETD,
                }).FirstAsync(x => x.Id == request.BusinessId);

                info.Main.TaskDesp = info.Main.TaskTitle = $"{request.TaskType.GetDescription()} {biz.Vessel} {biz.Voyno} ETD:{biz.ETD?.ToString("yyyy-MM-dd")} BLNo:{biz.MBLNO}";
            }

            if (useTransaction)
                await TenantDb.Ado.BeginTranAsync();

            try
            {
                var result = await ManagerService.InitTaskJob(info);
                if (!result.Succeeded)
                    return result;

                task = new BusinessTask
                {
                    BusinessId = request.BusinessId,
                    BusinessType = request.BusinessType,
                    TaskType = request.TaskType,
                    TaskStatus = TaskStatusEnum.Create,
                    RecvUsers = string.Join(',', info.Main.RecvUserInfoList.Select(x => x.RecvUserId)),
                    CreateBy = long.Parse(User.UserId),
                    CreateTime = DateTime.Now
                };
                task.NextType = GetNextType(task);
                await TenantDb.Insertable(task).ExecuteCommandAsync();

                //待审核，需创建工作流
                if (task.TaskType == TaskBaseTypeEnum.WAIT_ORDER_AUDIT)
                {
                    result = await Create_StartWorkflow(task);
                    if (!result.Succeeded)
                        return result;
                }

                result = await OnTaskCreated(task);
                if (!result.Succeeded)
                    return result;

                if (useTransaction)
                    await TenantDb.Ado.CommitTranAsync();

                return result;
            }
            catch (Exception ex)
            {
                if (useTransaction)
                    await TenantDb.Ado.RollbackTranAsync();

                await ex.LogAsync(Db);
                return DataResult.FailedWithDesc(nameof(MultiLanguageConst.Operation_Failed));
            }
        }

        /// <summary>
        /// 创建并启动审批工作流
        /// </summary>
        /// <param name="task"></param>
        /// <returns></returns>
        protected internal async Task<DataResult> Create_StartWorkflow(BusinessTask task)
        {
            var template = await FindTemplateAsync(AuditType.SeaExport);
            if (template == null)
                return DataResult.FailedWithDesc(nameof(MultiLanguageConst.TemplateNotFound));

            var result = FlowService.Value.CreateFlowInstance(new CreateFlowInstanceReq
            {
                BusinessId = task.BusinessId,
                BusinessType = BusinessType.OceanShippingExport,
                TemplateId = template.Id
            });
            //创建并启动实例
            if (result.Succeeded)
            {
                var instance = result.Data as FlowInstance;
                task.FlowId = instance.Id;
                await TenantDb.Updateable(task).UpdateColumns(x => x.FlowId).ExecuteCommandAsync();

                result = FlowService.Value.StartFlowInstance(instance.Id.ToString());
                instance = result.Data as FlowInstance;

                if (result.Succeeded)
                {
                    string[] ids = FlowInstanceService.GetNextMarkers(instance);
                    //变更任务接收人为审批执行人
                    await UpdateReceiverAsync(new MakerChangedCallback
                    {
                        BusinessId = task.BusinessId,
                        BusinessType = task.BusinessType,
                        InstanceId = instance.Id,
                        Type = instance.Type,
                        NextUserId = ids.Select(long.Parse).ToArray()
                    });
                }
            }

            return result;
        }

        /// <summary>
        /// 当任务创建时调用
        /// </summary>
        /// <param name="task"></param>
        /// <returns></returns>
        protected virtual Task<DataResult> OnTaskCreated(BusinessTask task)
        {
            return Task.FromResult(DataResult.Success);
        }

        /// <summary>
        /// 设置任务状态
        /// </summary>
        /// <param name="request"></param>
        /// <param name="useTransaction">是否使用事务</param>
        /// <returns></returns>
        public async Task<DataResult> SetTaskStatusAsync(TaskUpdateRequest request, bool useTransaction = true)
        {
            if (!await EnsureModuleAuthorized())
                return DataResult.SuccessedWithDesc(nameof(MultiLanguageConst.ModuleUnauthorized));

            if (useTransaction)
                await TenantDb.Ado.BeginTranAsync();

            try
            {
                var result = await ManagerService.SetTaskStatus(request.BusinessId, request.TaskType, request.TaskStatus, DateTime.Now);
                if (!result.Succeeded)
                    return result;

                BusinessTask task = await GetQuery(request.BusinessId, request.BusinessType, request.TaskType).FirstAsync();
                if (task == null)
                    return DataResult.FailedWithDesc(nameof(MultiLanguageConst.EmptyData));
                if (task.TaskStatus == TaskStatusEnum.Complete)
                    return DataResult.FailedWithDesc(nameof(MultiLanguageConst.TaskCompleted));
                if (task.TaskStatus == TaskStatusEnum.Cancel)
                    return DataResult.FailedWithDesc(nameof(MultiLanguageConst.TaskCancelled));

                //触发任务状态变更通知
                if (task.TaskStatus != request.TaskStatus)
                    await OnTaskStatusChanged(request);

                //更新当前任务状态
                task.TaskStatus = request.TaskStatus;
                if (task.TaskType == TaskBaseTypeEnum.WAIT_ORDER_AUDIT)
                    task.FlowId = null;

                await TenantDb.Updateable(task).UpdateColumns(x => new { x.TaskStatus, x.FlowId }).ExecuteCommandAsync();

                if (task.TaskStatus == TaskStatusEnum.Complete)
                {
                    //若存在下一任务，则继续创建
                    if (task.NextType.HasValue && request.AutoCreateNext)
                    {
                        var req = new TaskCreationRequest
                        {
                            BusinessId = request.BusinessId,
                            BusinessType = request.BusinessType,
                            TaskType = task.NextType.Value,
                            RecvUserIdList = task.RecvUserIdArray,
                        };
                        await CreateTaskAsync(req, false);
                    }
                }

                if (useTransaction)
                    await TenantDb.Ado.CommitTranAsync();

                return DataResult.Success;
            }
            catch (Exception ex)
            {
                if (useTransaction)
                    await TenantDb.Ado.RollbackTranAsync();

                await ex.LogAsync(Db);
                return DataResult.FailedWithDesc(nameof(MultiLanguageConst.Operation_Failed));
            }
        }

        /// <summary>
        /// 当任务状态发生变化时调用
        /// </summary>
        /// <param name="request"></param>
        /// <returns></returns>
        protected virtual Task OnTaskStatusChanged(TaskUpdateRequest request)
        {
            return Task.CompletedTask;
        }

        /// <summary>
        /// 通知更新任务接收人
        /// </summary>
        /// <param name="callback">回调信息</param>
        /// <returns></returns>
        /// <exception cref="ArgumentNullException"><paramref name="callback"/>为null时引发</exception>
        public virtual async Task UpdateReceiverAsync(MakerChangedCallback callback)
        {
            ArgumentNullException.ThrowIfNull(callback, nameof(callback));

            if (callback.NextUserId == null)
                return;

            var users = await GetRecvUsers(callback.NextUserId);
            var result = await ManagerService.TransferTask(callback.BusinessId, TaskBaseTypeEnum.WAIT_ORDER_AUDIT, users);
            if (!result.Succeeded)
            {
                await new ApplicationException($"任务API({nameof(ManagerService.TransferTask)})调用失败：" + result.Message).LogAsync(Db);
                return;
            }

            string recvUser = string.Join(',', callback.NextUserId);
            await TenantDb.Updateable<BusinessTask>().Where(x => x.BusinessId == callback.BusinessId &&
                x.BusinessType == callback.BusinessType && x.TaskType == TaskBaseTypeEnum.WAIT_ORDER_AUDIT)
                .SetColumns(x => x.RecvUsers == recvUser)
                .ExecuteCommandAsync();
        }

        /// <summary>
        /// 审批完成回调更新
        /// </summary>
        /// <param name="callback">回调信息</param>
        /// <returns></returns>
        /// <exception cref="ArgumentNullException"><paramref name="callback"/>为null时引发</exception>
        public virtual async Task UpdateBusinessAsync(FlowCallback callback)
        {
            ArgumentNullException.ThrowIfNull(callback, nameof(callback));

            //根据审批结果更新任务状态
            await SetTaskStatusAsync(new TaskUpdateRequest
            {
                BusinessId = callback.BusinessId,
                BusinessType = callback.BusinessType.Value,
                TaskType = TaskBaseTypeEnum.WAIT_ORDER_AUDIT,
                TaskStatus = callback.FlowStatus == FlowStatusEnum.Approve ? TaskStatusEnum.Complete : TaskStatusEnum.Pending,
                AutoCreateNext = callback.FlowStatus == FlowStatusEnum.Approve
            });

            if (callback.FlowStatus == FlowStatusEnum.Reject)
            {
                //创建审单驳回任务以进行通知
                var task = await GetQuery(callback.BusinessId, callback.BusinessType.Value, TaskBaseTypeEnum.WAIT_ORDER_AUDIT).FirstAsync();
                await CreateTaskAsync(new TaskCreationRequest
                {
                    BusinessId = callback.BusinessId,
                    BusinessType = callback.BusinessType.GetValueOrDefault(),
                    TaskType = TaskBaseTypeEnum.ORDER_AUDIT_REJECTED,
                    RecvUserIdList = [task.CreateBy] //通知任务发起人
                });
            }
        }

        /// <summary>
        /// 获取指定类型的业务关联任务
        /// </summary>
        /// <param name="id">业务ID</param>
        /// <param name="businessType">业务类型</param>
        /// <param name="taskType">任务类型</param>
        /// <returns></returns>
        protected internal ISugarQueryable<BusinessTask> GetQuery(long id, BusinessType businessType, TaskBaseTypeEnum taskType)
        {
            return TenantDb.Queryable<BusinessTask>().Where(x =>
                x.BusinessId == id && x.BusinessType == businessType && x.TaskType == taskType);
        }

        /// <summary>
        /// 获取任务接收用户列表
        /// </summary>
        /// <param name="ids">用户ID</param>
        /// <returns></returns>
        protected internal async Task<List<RecvUserInfo>> GetRecvUsers(params long[] ids)
        {
            return await Db.Queryable<SysUser>().Where(x => ids.Contains(x.Id)).Select(
                x => new RecvUserInfo { RecvUserId = x.Id, RecvUserName = x.UserName }).ToListAsync();
        }
    }
}