using System.Collections.Generic;
using DS.Module.Core;
using DS.Module.Core.Extensions;
using DS.WMS.Core.Application.Dtos;
using DS.WMS.Core.Application.Entity;
using DS.WMS.Core.Application.Interface;
using DS.WMS.Core.Fee.Dtos;
using DS.WMS.Core.Fee.Entity;
using DS.WMS.Core.Fee.Method;
using DS.WMS.Core.Flow.Dtos;
using DS.WMS.Core.Flow.Entity;
using DS.WMS.Core.Flow.Interface;
using DS.WMS.Core.Op.Dtos.TaskInteraction;
using DS.WMS.Core.Op.Interface.TaskInteraction;
using DS.WMS.Core.Sys.Interface;
using Microsoft.Extensions.DependencyInjection;
using SqlSugar;

namespace DS.WMS.Core.Application.Method
{
    /// <summary>
    /// 申请单基础实现
    /// </summary>
    /// <typeparam name="TEntity">实体的类型声明</typeparam>
    public abstract class ApplicationService<TEntity> : FeeServiceBase, IApplicationService<TEntity>
        where TEntity : ApplicationForm, new()
    {
        /// <summary>
        /// 适用于当前申请单的审核类型
        /// </summary>
        public abstract TaskBaseTypeEnum AuditType { get; }

        readonly IClientFlowInstanceService flowService;
        readonly Lazy<ICommonService> commonService;
        readonly ITaskService taskService;

        /// <summary>
        /// 初始化
        /// </summary>
        /// <param name="serviceProvider">DI容器</param>
        public ApplicationService(IServiceProvider serviceProvider) : base(serviceProvider)
        {
            flowService = serviceProvider.GetRequiredService<IClientFlowInstanceService>();
            commonService = new Lazy<ICommonService>(serviceProvider.GetRequiredService<ICommonService>());
            taskService = serviceProvider.GetRequiredService<ITaskService>();
        }

        #region 保存

        /// <summary>
        /// 提交保存费用申请单
        /// </summary>
        /// <param name="application">申请单</param>
        /// <returns></returns>
        public async Task<DataResult<TEntity>> SaveAsync(TEntity application)
        {
            TEntity? dbValue = null;
            if (application.Id > 0)
            {
                //修改需检查申请单状态
                dbValue = await TenantDb.Queryable<TEntity>().Where(x => x.Id == application.Id).Select(
                    x => new TEntity { Status = x.Status, Currency = x.Currency }).FirstAsync();

                if (dbValue == null)
                    return DataResult<TEntity>.FailedWithDesc(nameof(MultiLanguageConst.EmptyData));
            }

            application.Details ??= [];
            var result = EnsureApplication(application, dbValue);
            if (!result.Succeeded)
                return DataResult<TEntity>.Failed(result.Message, result.MultiCode);

            List<FeeRecord> fees = [];
            if (application.Details.Count > 0)
            {
                //由于提交时只允许新增明细，需要移除已存在ID的明细
                application.Details.RemoveAll(x => x.Id > 0);

                if (application.Details.GroupBy(x => x.CustomerName).Select(x => x.Key).Count() > 1)
                    return DataResult<TEntity>.FailedWithDesc(nameof(MultiLanguageConst.DetailCustomerOnlyOne));

                if (application.Details.GroupBy(x => x.RecordId).Where(g => g.Count() > 1).Select(x => x.Key).Count() > 0)
                    return DataResult<TEntity>.FailedWithDesc(nameof(MultiLanguageConst.ApplicationRecordOnlyOne));

                //申请金额禁止为0
                if (application.Details.Any(x => x.ApplyAmount == 0))
                    return DataResult<TEntity>.FailedWithDesc(nameof(MultiLanguageConst.AmountCannotBeZero));

                var ids = application.Details.Select(x => x.RecordId).Distinct().ToList();
                fees = await TenantDb.Queryable<FeeRecord>().Where(x => ids.Contains(x.Id)).Select(x => new FeeRecord
                {
                    Id = x.Id,
                    BusinessId = x.BusinessId,
                    BusinessType = x.BusinessType,
                    FeeId = x.FeeId,
                    FeeName = x.FeeName,
                    FeeType = x.FeeType,
                    CustomerId = x.CustomerId,
                    CustomerName = x.CustomerName,
                    Amount = x.Amount,
                    Currency = x.Currency,
                    ExchangeRate = x.ExchangeRate,
                    OrderAmount = x.OrderAmount,
                    OrderSettlementAmount = x.OrderSettlementAmount,
                    SettlementAmount = x.SettlementAmount
                }).ToListAsync();

                if (fees.Count != application.Details.Count)
                    return DataResult<TEntity>.FailedWithDesc(nameof(MultiLanguageConst.FeeRecordNone));

                if (application.Id == 0)
                {
                    //填充申请单信息
                    var fee = fees[0];
                    application.CustomerId = fee.CustomerId;
                    application.CustomerName = fee.CustomerName;
                }

                foreach (var detail in application.Details)
                {
                    detail.ApplicationId = application.Id;
                    var fee = fees.Find(x => x.Id == detail.RecordId);
                    detail.ExchangeRate = detail.ExchangeRate ?? fee.ExchangeRate;
                    detail.FeeId = fee.FeeId;
                    detail.FeeName = fee.FeeName;
                    detail.FeeType = fee.FeeType;
                    detail.CustomerName = detail.CustomerName ?? application.CustomerName;

                    //原币申请
                    if (application.Currency.IsNullOrEmpty())
                    {
                        detail.OriginalAmount = detail.ApplyAmount;

                        if (detail.OriginalCurrency.IsNullOrEmpty())
                            detail.OriginalCurrency = fee.Currency;
                    }
                }

                result = CalculateAmount(application, fees);
                if (!result.Succeeded)
                    return DataResult<TEntity>.Failed(result.Message, result.MultiCode);
            }

            await TenantDb.Ado.BeginTranAsync();
            try
            {
                await PreSaveAsync(application);

                //关联导航属性插入
                if (application.Id == 0)
                {
                    //创建时需要生成申请单编号
                    var sequence = commonService.Value.GetSequenceNext<TEntity>();
                    if (!sequence.Succeeded)
                    {
                        return DataResult<TEntity>.Failed(sequence.Message, MultiLanguageConst.SequenceSetNotExist);
                    }
                    application.ApplicationNO = sequence.Data;

                    await TenantDb.InsertNav(application).Include(x => x.Details).ExecuteCommandAsync();
                }
                else
                {
                    if (application.Details.Count > 0)
                        await TenantDb.Insertable(application.Details).ExecuteCommandAsync();
                }

                await OnSaveAsync(application, fees);
                await TenantDb.Ado.CommitTranAsync();

                var postResult = await PostSaveAsync(application);
                return postResult;
            }
            catch (Exception ex)
            {
                await TenantDb.Ado.RollbackTranAsync();
                await ex.LogAsync(Db);
                return DataResult<TEntity>.FailedWithDesc(nameof(MultiLanguageConst.Operation_Failed));
            }
        }

        /// <summary>
        /// 提交保存费用申请单
        /// </summary>
        /// <param name="request"></param>
        /// <returns></returns>
        public async Task<DataResult<TEntity>> SaveAsync(ApplicationRequest<TEntity> request)
        {
            request.Application ??= new();

            List<IConditionalModel> whereList = [];
            if (!string.IsNullOrEmpty(request.QueryString))
                whereList = Db.ConfigQuery.Context.Utilities.JsonToConditionalModels(request.QueryString);

            request.Application.Details = await GetDetailsAsync(request.Items, whereList);
            return await SaveAsync(request.Application);
        }

        /// <summary>
        /// 用于申请单的状态检查
        /// </summary>
        /// <param name="application">提交的申请单</param>
        /// <param name="dbValue">数据库值，新增时为null</param>
        /// <returns></returns>
        protected virtual DataResult EnsureApplication(TEntity application, TEntity? dbValue)
        {
            return DataResult.Success;
        }

        /// <summary>
        /// 根据申请单明细，检查费用记录的剩余额度
        /// </summary>
        /// <param name="application">申请单</param>
        /// <param name="fees">费用记录</param>
        /// <returns></returns>
        protected virtual DataResult CalculateAmount(TEntity application, List<FeeRecord> fees)
        {
            return DataResult.Success;
        }

        /// <summary>
        /// 在保存前调用
        /// </summary>
        /// <param name="application">申请单</param>
        /// <returns></returns>
        protected virtual Task PreSaveAsync(TEntity application)
        {
            return Task.CompletedTask;
        }

        /// <summary>
        /// 在保存时调用
        /// </summary>
        /// <param name="application">已保存的申请单</param>
        /// <param name="fees">需要更新信息的费用记录</param>
        /// <returns></returns>
        protected virtual async Task OnSaveAsync(TEntity application, List<FeeRecord>? fees)
        {
            await TenantDb.Updateable(application).IgnoreColumns(x => new
            {
                x.ApplicationNO,
                x.Status,
                x.CreateBy,
                x.CreateTime,
                x.Deleted,
                x.DeleteBy,
                x.DeleteTime
            }).ExecuteCommandAsync();
        }

        /// <summary>
        /// 在保存完成后调用
        /// </summary>
        /// <param name="application">申请单</param>
        protected virtual Task<DataResult<TEntity>> PostSaveAsync(TEntity application)
        {
            return Task.FromResult(DataResult<TEntity>.Success(application));
        }

        /// <summary>
        /// 获取业务所关联的申请明细
        /// </summary>
        /// <param name="items"></param>
        /// <param name="conditions"></param>
        /// <returns></returns>
        protected virtual Task<List<ApplicationDetail>> GetDetailsAsync(IEnumerable<BizItem> items, List<IConditionalModel>? conditions)
        {
            return Task.FromResult(new List<ApplicationDetail>());
        }

        #endregion

        #region 删除

        /// <summary>
        /// 删除申请单明细
        /// </summary>
        /// <param name="ids">申请单明细ID</param>
        /// <returns></returns>
        public async Task<DataResult> DeleteDetailAsync(params long[] ids)
        {
            var details = await TenantDb.Queryable<ApplicationDetail>().Where(x => ids.Contains(x.Id)).Select(
                x => new ApplicationDetail
                {
                    Id = x.Id,
                    ApplicationId = x.ApplicationId,
                    RecordId = x.RecordId,
                    OriginalAmount = x.OriginalAmount
                }).ToListAsync();
            var appIds = details.Select(x => x.ApplicationId).Distinct().ToList();
            var apps = await TenantDb.Queryable<TEntity>().Where(x => appIds.Contains(x.Id)).Select(x => new TEntity
            {
                Id = x.Id,
                Status = x.Status
            }).ToListAsync();

            foreach (var app in apps)
                app.Details = details.FindAll(x => x.ApplicationId == app.Id);

            var result = PreDelete(apps);
            if (!result.Succeeded)
                return result;

            await TenantDb.Ado.BeginTranAsync();
            try
            {
                await OnDeleteDetailAsync(apps, DeleteOption.DetailOnly);
                await TenantDb.Deleteable(details).ExecuteCommandAsync();

                await TenantDb.Ado.CommitTranAsync();
                return DataResult.Success;
            }
            catch (Exception ex)
            {
                await TenantDb.Ado.RollbackTranAsync();
                await ex.LogAsync(Db);
                return DataResult.FailedWithDesc(nameof(MultiLanguageConst.Operation_Failed));
            }
        }

        /// <summary>
        /// 在删除申请单或其明细之前调用，用于检查申请单状态
        /// </summary>
        /// <param name="applications">申请单</param>
        /// <returns></returns>
        protected virtual DataResult PreDelete(List<TEntity> applications)
        {
            return DataResult.Success;
        }

        /// <summary>
        /// 在执行删除申请单或其明细时调用
        /// </summary>
        /// <param name="applications">申请单及其明细</param>
        /// <param name="deleteOption">删除选项</param>
        /// <returns></returns>
        protected virtual Task OnDeleteDetailAsync(List<TEntity> applications, DeleteOption deleteOption)
        {
            return Task.CompletedTask;
        }

        /// <summary>
        /// 删除申请单
        /// </summary>
        /// <param name="ids">申请单ID</param>
        /// <returns></returns>
        public async Task<DataResult> DeleteAsync(params long[] ids)
        {
            var apps = await TenantDb.Queryable<TEntity>().Where(x => ids.Contains(x.Id)).Select(x => new TEntity
            {
                Id = x.Id,
                Status = x.Status
            }).ToListAsync();
            var details = await TenantDb.Queryable<ApplicationDetail>().Where(x => ids.Contains(x.ApplicationId)).Select(
                x => new ApplicationDetail
                {
                    Id = x.Id,
                    ApplicationId = x.ApplicationId,
                    RecordId = x.RecordId,
                    OriginalAmount = x.OriginalAmount
                }).ToListAsync();

            foreach (var app in apps)
                app.Details = details.FindAll(x => x.ApplicationId == app.Id); await TenantDb.Ado.BeginTranAsync();

            var result = PreDelete(apps);
            if (!result.Succeeded)
                return result;

            try
            {
                await OnDeleteDetailAsync(apps, DeleteOption.Entire);
                await TenantDb.DeleteNav<TEntity>(x => ids.Contains(x.Id)).Include(x => x.Details).ExecuteCommandAsync();

                await TenantDb.Ado.CommitTranAsync();
                return DataResult.Success;
            }
            catch (Exception ex)
            {
                await TenantDb.Ado.RollbackTranAsync();
                await ex.LogAsync(Db);
                return DataResult.FailedWithDesc(nameof(MultiLanguageConst.Operation_Failed));
            }
        }

        #endregion

        #region 审批

        /// <summary>
        /// 提交审批
        /// </summary>
        /// <param name="auditType">审批类型</param>
        /// <param name="remark">审批备注</param>
        /// <param name="idArray">申请单ID</param>
        /// <returns></returns>
        public async Task<DataResult> SubmitApprovalAsync(TaskBaseTypeEnum auditType, string remark, params long[] idArray)
        {
            var list = await TenantDb.Queryable<TEntity>().LeftJoin<ApplicationDetail>((x, y) => x.Id == y.ApplicationId)
                .GroupBy((x, y) => x.Id)
                .Where((x, y) => idArray.Contains(x.Id))
                .Select((x, y) => new TEntity
                {
                    Id = x.Id,
                    Status = x.Status,
                    DetailCount = SqlFunc.AggregateCount(y.Id)
                }).ToListAsync();

            if (list.Count == 0)
                return DataResult.FailedWithDesc(nameof(MultiLanguageConst.EmptyData));

            if (list.Exists(x => x.DetailCount == 0))
                return DataResult.FailedWithDesc(nameof(MultiLanguageConst.ApplicationMustHaveDetail));

            var result = PreSubmitApproval(list);
            if (!result.Succeeded)
                return result;

            List<TEntity> entities = new List<TEntity>(idArray.Length);
            bool hasAuthorized = await taskService.HasAuthorizedAsync();
            await TenantDb.Ado.BeginTranAsync();
            try
            {
                if (hasAuthorized)
                {
                    for (int i = 0; i < idArray.Length; i++)
                    {
                        var req = new TaskCreationRequest
                        {
                            BusinessId = idArray[i],
                            TaskTypeName = auditType.ToString()
                        };
                        result = await taskService.CreateTaskAsync(req);

                        if (result.Succeeded)
                        {
                            var entity = new TEntity { Id = req.BusinessId };
                            OnSubmitApproval(entity);
                            entities.Add(entity);
                        }
                    }
                }
                else
                {
                    var template = await FindTemplateAsync(auditType);
                    if (template == null)
                        return DataResult.FailedWithDesc(nameof(MultiLanguageConst.TemplateNotFound));

                    var list2 = list.Select(x => new TEntity { Id = x.Id, Status = x.Status }).ToList();
                    foreach (var item in list2)
                    {
                        result = flowService.CreateFlowInstance(new CreateFlowInstanceReq
                        {
                            BusinessId = item.Id,
                            TemplateId = template.Id
                        });

                        if (result.Succeeded)
                        {
                            var instance = result.Data as FlowInstance;
                            flowService.StartFlowInstance(instance.Id.ToString());

                            OnSubmitApproval(item);
                            entities.Add(item);
                        }
                    }
                }

                await TenantDb.Updateable(entities).UpdateColumns(x => new { x.Status }).ExecuteCommandAsync();
                await TenantDb.Ado.CommitTranAsync();
                return DataResult.Success;
            }
            catch (Exception ex)
            {
                await TenantDb.Ado.RollbackTranAsync();
                await ex.LogAsync(Db);
                return DataResult.FailedWithDesc(nameof(MultiLanguageConst.Operation_Failed));
            }
        }

        /// <summary>
        /// 在提交审批前调用，用于检查申请单状态
        /// </summary>
        /// <param name="applications">申请单</param>
        /// <returns></returns>
        protected virtual DataResult PreSubmitApproval(List<TEntity> applications)
        {
            return DataResult.Success;
        }

        /// <summary>
        /// 在提交审批时调用，用于更新申请单信息
        /// </summary>
        /// <param name="application">申请单</param>
        /// <returns></returns>
        protected virtual void OnSubmitApproval(TEntity application)
        {
        }

        /// <summary>
        /// 撤销审批
        /// </summary>
        /// <param name="ids">申请单ID</param>
        /// <returns></returns>
        public async Task<DataResult> WithdrawAsync(params long[] ids)
        {
            var list = await TenantDb.Queryable<TEntity>().Where(x => ids.Contains(x.Id)).Select(
                x => new TEntity
                {
                    Id = x.Id,
                    ApplicationNO = x.ApplicationNO,
                    Status = x.Status
                }).ToListAsync();

            if (list.Count == 0)
                return DataResult.FailedWithDesc(nameof(MultiLanguageConst.EmptyData));

            //未在审批状态中
            if (!await flowService.Exists(ids: ids))
                return DataResult.FailedWithDesc(nameof(MultiLanguageConst.NotInAudit));

            DataResult result;
            bool hasAuthorized = await taskService.HasAuthorizedAsync();
            try
            {
                if (hasAuthorized)
                {
                    foreach (var item in list)
                    {
                        result = await taskService.WithdrawAsync(new TaskRequest
                        {
                            BusinessId = item.Id,
                            TaskTypeName = AuditType.ToString()
                        }, false);

                        OnWithdraw(item);
                    }
                }
                else
                {
                    result = await flowService.WithdrawAsync(ids);
                    if (!result.Succeeded)
                        return result;

                    foreach (var item in list)
                    {
                        OnWithdraw(item);
                    }
                }

                await TenantDb.Updateable(list).UpdateColumns(x => new { x.Status }).ExecuteCommandAsync();

                await TenantDb.Ado.CommitTranAsync();
                return DataResult.Success;
            }
            catch (Exception ex)
            {
                await TenantDb.Ado.RollbackTranAsync();
                await ex.LogAsync(Db);
                return DataResult.FailedWithDesc(nameof(MultiLanguageConst.Operation_Failed));
            }
        }

        /// <summary>
        /// 在撤销审批时调用，用于更新申请单信息
        /// </summary>
        /// <param name="application">申请单</param>
        /// <returns></returns>
        protected virtual void OnWithdraw(TEntity application)
        {
        }

        #endregion
    }
}