using DOAN.Model.BZFM;
using DOAN.Model.BZFM.Dto;
using DOAN.Model.Mobile.Dto;
using DOAN.Repository;
using DOAN.Service.BZFM.IBZFMService;
using Infrastructure.Attribute;
using Infrastructure.Extensions;

namespace DOAN.Service.BZFM
{
    /// <summary>
    /// 库存表Service业务层处理
    /// </summary>
    [AppService(ServiceType = typeof(IMmInventoryService), ServiceLifetime = LifeTime.Transient)]
    public class MmInventoryService : BaseService<MmInventory>, IMmInventoryService
    {
        /// <summary>
        /// 查询库存表列表
        /// </summary>
        /// <param name="parm"></param>
        /// <returns></returns>
        public PagedInfo<MmInventoryDto> GetList(MmInventoryQueryDto parm)
        {
            var predicate = QueryExp(parm);

            var response = Queryable()
                .Where(predicate.ToExpression())
                .ToPage<MmInventory, MmInventoryDto>(parm);

            return response;
        }


        /// <summary>
        /// 获取详情
        /// </summary>
        /// <param name="Id"></param>
        /// <returns></returns>
        public MmInventory GetInfo(int Id)
        {
            var response = Queryable()
                .Where(x => x.Id == Id)
                .First();

            return response;
        }

        /// <summary>
        /// 添加库存表
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public MmInventory AddMmInventory(MmInventory model)
        {
            return Insertable(model).ExecuteReturnEntity();
        }

        /// <summary>
        /// 修改库存表
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public int UpdateMmInventory(MmInventory model)
        {
            return Update(model, true);
        }

        /// <summary>
        /// 查询导出表达式
        /// </summary>
        /// <param name="parm"></param>
        /// <returns></returns>
        private static Expressionable<MmInventory> QueryExp(MmInventoryQueryDto parm)
        {
            var predicate = Expressionable.Create<MmInventory>()
                .AndIF(!string.IsNullOrEmpty(parm.WarehouseCode), m => m.WarehouseCode.Contains(parm.WarehouseCode))
                .AndIF(!string.IsNullOrEmpty(parm.MaterialCode), m => m.MaterialCode.Contains(parm.MaterialCode))
                ;

            return predicate;
        }

        public List<MmMaterialOption> GetMaterialOption()
        {
            try
            {
                return Context.Queryable<MmMaterial>()
                    .Where(it => it.Status == "启用")
                    .Select(it => new MmMaterialOption
                    {
                        MaterialCode = it.MaterialCode,
                        MaterialName = it.MaterialName,
                        CategoryCode = it.CategoryCode,
                        Specification = it.Specification
                    })
                    .ToList();
            }
            catch (Exception)
            {

                throw;
            }
        }


        public List<MmLocationOption> GetLocationOption()
        {
            try
            {
                return Context.Queryable<MmLocation>()
                    .Where(it => it.Status == "启用")
                    .Select(it => new MmLocationOption
                    {
                        WarehouseCode = it.WarehouseCode,
                        WarehouseName = it.WarehouseName,
                        LocationCode = it.LocationCode,
                        LocationName = it.LocationName,
                        LocationType = it.LocationType
                    })
                    .ToList();
            }
            catch (Exception)
            {

                throw;
            }
        }

        public List<MmTransactionOption> GetTransactionOption()
        {
            try
            {
                return Context.Queryable<MmTransactionType>()
                    .Where(it => it.Status == "启用")
                    .Select(it => new MmTransactionOption
                    {
                        Label = it.TypeName,
                        Value = it.TypeCode
                    })
                    .ToList();
            }
            catch (Exception)
            {

                throw;
            }
        }

        public string CreateInboundReceipt(InboundReceiptDto parm)
        {
            try
            {
                DateTime nowDate = DateTime.Now;

                // 计算有符号变动量（蓝单为正，红单为负）
                decimal delta = GetSignedQuantity(parm.ReceiptType, parm.Quantity);

                // 校验物料和库位
                var mmMaterial = Context.Queryable<MmMaterial>().Where(it => it.MaterialCode == parm.MaterialCode).First();
                if (mmMaterial == null) return "物料不存在!";

                var mmLocation = Context.Queryable<MmLocation>()
                    .Where(it => it.WarehouseCode == parm.WarehouseCode)
                    .Where(it => it.LocationCode == parm.LocationCode)
                    .First();
                if (mmLocation == null) return "仓库编码或库位编码不存在!";

                // 启用事务
                Context.Ado.BeginTran();

                // 获取现有库存（同物料、批次、库位）
                var mmInventory = Context.Queryable<MmInventory>()
                    .Where(it => it.MaterialCode == parm.MaterialCode)
                    .Where(it => it.BatchNo == parm.BatchNo)
                    .Where(it => it.WarehouseCode == parm.WarehouseCode)
                    .Where(it => it.LocationCode == parm.LocationCode)
                    .First();

                // 若不存在则新增；存在则更新
                if (mmInventory == null)
                {
                    var newInventory = new MmInventory()
                    {
                        MaterialCode = mmMaterial.MaterialCode,
                        MaterialName = mmMaterial.MaterialName,
                        LocationCode = mmLocation.LocationCode,
                        LocationName = mmLocation.LocationName,
                        WarehouseCode = mmLocation.WarehouseCode,
                        WarehouseName = mmLocation.WarehouseName,
                        BatchNo = parm.BatchNo,
                        CurrentQty = delta,
                        Unit = parm.Unit,
                        ExpiryDate = parm.ExpiryDate,
                        LastUpdatedTime = null,
                        ProductionDate = parm.ProductionDate,
                        CreatedTime = nowDate
                    };
                    Context.Insertable(newInventory).ExecuteCommand();
                }
                else
                {
                    Context.Updateable(mmInventory)
                        .SetColumns(it => it.CurrentQty == it.CurrentQty + delta)
                        .ExecuteCommand();
                }

                // 插入入库记录，入库单号使用自动增长策略（同日期按序号）
                var inboundNo = GenerateReceiptNo("RK");
                MmRecordInbound newRecord = new()
                {
                    InboundNo = inboundNo,
                    BatchNo = parm.BatchNo,
                    Operator = parm.Operator,
                    MaterialCode = mmMaterial.MaterialCode,
                    MaterialName = mmMaterial.MaterialName,
                    LocationCode = mmLocation.LocationCode,
                    LocationName = mmLocation.LocationName,
                    WarehouseCode = mmLocation.WarehouseCode,
                    WarehouseName = mmLocation.WarehouseName,
                    Quantity = parm.Quantity,
                    Unit = parm.Unit,
                    SupplierCode = parm.SupplierCode,
                    SupplierName = parm.SupplierName,
                    ProductionDate = parm.ProductionDate,
                    ExpiryDate = parm.ExpiryDate,
                    CreatedTime = nowDate,
                    TransactionType = parm.TransactionType,
                    Remarks = parm.Remarks
                };
                Context.Insertable(newRecord).ExecuteCommand();

                Context.Ado.CommitTran();
                return "ok";
            }
            catch (Exception ex)
            {
                // 回滚操作
                Context.Ado.RollbackTran();
                return ex.Message;
            }
        }

        public string CreateOutboundReceipt(OutboundReceiptDto parm)
        {
            try
            {
                DateTime nowDate = DateTime.Now;

                // 计算有符号变动量（蓝单为正，红单为负）
                decimal delta = GetSignedQuantity(parm.ReceiptType, parm.Quantity);

                var mmMaterial = Context.Queryable<MmMaterial>().Where(it => it.MaterialCode == parm.MaterialCode).First();
                if (mmMaterial == null) return "物料不存在!";

                var mmLocation = Context.Queryable<MmLocation>()
                    .Where(it => it.WarehouseCode == parm.WarehouseCode)
                    .Where(it => it.LocationCode == parm.LocationCode)
                    .First();
                if (mmLocation == null) return "仓库编码或库位编码不存在!";

                Context.Ado.BeginTran();

                var mmInventory = Context.Queryable<MmInventory>()
                    .Where(it => it.MaterialCode == parm.MaterialCode)
                    .Where(it => it.BatchNo == parm.BatchNo)
                    .Where(it => it.WarehouseCode == parm.WarehouseCode)
                    .Where(it => it.LocationCode == parm.LocationCode)
                    .First();

                if (mmInventory == null)
                {
                    var newInventory = new MmInventory()
                    {
                        MaterialCode = mmMaterial.MaterialCode,
                        MaterialName = mmMaterial.MaterialName,
                        LocationCode = mmLocation.LocationCode,
                        LocationName = mmLocation.LocationName,
                        WarehouseCode = mmLocation.WarehouseCode,
                        WarehouseName = mmLocation.WarehouseName,
                        BatchNo = parm.BatchNo,
                        CurrentQty = -delta,
                        Unit = parm.Unit,
                        LastUpdatedTime = null,
                        CreatedTime = nowDate
                    };
                    Context.Insertable(newInventory).ExecuteCommand();
                }
                else
                {
                    if (mmInventory.CurrentQty - delta < 0)
                    {
                        Context.Ado.RollbackTran();
                        return "库存不足，无法出库";
                    }

                    Context.Updateable(mmInventory)
                        .SetColumns(it => it.CurrentQty == it.CurrentQty - delta)
                        .ExecuteCommand();
                }

                var outboundNo = GenerateReceiptNo("CK");
                MmRecordOutbound newRecord = new()
                {
                    OutboundNo = outboundNo,
                    BatchNo = parm.BatchNo,
                    Operator = parm.Operator,
                    MaterialCode = mmMaterial.MaterialCode,
                    MaterialName = mmMaterial.MaterialName,
                    LocationCode = mmLocation.LocationCode,
                    LocationName = mmLocation.LocationName,
                    WarehouseCode = mmLocation.WarehouseCode,
                    WarehouseName = mmLocation.WarehouseName,
                    Quantity = parm.Quantity,
                    Unit = parm.Unit,
                    CreatedTime = nowDate,
                    TransactionType = parm.TransactionType,
                    Remarks = parm.Remarks
                };
                Context.Insertable(newRecord).ExecuteCommand();
                Context.Ado.CommitTran();
                return "ok";
            }
            catch (Exception ex)
            {
                // 回滚操作
                Context.Ado.RollbackTran();
                return ex.Message;
            }
        }

        /// <summary>
        /// 根据单据类型与数量计算有符号变动量（蓝单为正，红单为负）
        /// </summary>
        /// <param name="receiptType">1 表示蓝单（正），其它为红单（负）</param>
        /// <param name="quantity">1 表示蓝单（正），其它为红单（负）</param>
        private static decimal GetSignedQuantity(int receiptType, decimal quantity)
        {
            return receiptType == 1 ? Math.Abs(quantity) : -Math.Abs(quantity);
        }

        /// <summary>
        /// 生成单据编号，格式：{prefix}{yyyyMMdd}-{nnn}
        /// 例如：RK20251225-001
        /// </summary>
        private string GenerateReceiptNo(string prefix)
        {
            var datePart = DateTime.Now.ToString("yyyyMMdd");
            var baseNo = prefix + datePart + "-";

            // 尝试从入库/出库表中获取当天最大的编号后缀
            try
            {
                if (prefix == "RK")
                {
                    var last = Context.Queryable<MmRecordInbound>()
                        .Where(it => it.InboundNo.StartsWith(prefix + datePart))
                        .OrderBy(it => it.InboundNo + " desc")
                        .Select(it => it.InboundNo)
                        .First();
                    if (string.IsNullOrEmpty(last))
                    {
                        return baseNo + "001";
                    }
                    var suf = last.Substring((prefix + datePart).Length).TrimStart('-', '_');
                    if (int.TryParse(suf, out var n))
                    {
                        return baseNo + (n + 1).ToString("D3");
                    }
                    return baseNo + "001";
                }
                else
                {
                    var last = Context.Queryable<MmRecordOutbound>()
                        .Where(it => it.OutboundNo.StartsWith(prefix + datePart))
                        .OrderBy(it => it.OutboundNo + " desc")
                        .Select(it => it.OutboundNo)
                        .First();
                    if (string.IsNullOrEmpty(last))
                    {
                        return baseNo + "001";
                    }
                    var suf = last.Substring((prefix + datePart).Length).TrimStart('-', '_');
                    if (int.TryParse(suf, out var n))
                    {
                        return baseNo + (n + 1).ToString("D3");
                    }
                    return baseNo + "001";
                }
            }
            catch
            {
                return baseNo + "001";
            }
        }

    }
}