using Microsoft.Extensions.Logging;
using WIDESEA_Common.LocationEnum;
using WIDESEA_Common.StockEnum;
using WIDESEA_Core;
using WIDESEA_Core.BaseRepository;
using WIDESEA_Core.BaseServices;
using WIDESEA_IBasicService;
using WIDESEA_IOutboundService;
using WIDESEA_IRecordService;
using WIDESEA_IStockService;
using WIDESEA_Model.Models;

namespace WIDESEA_OutboundService
{
    public partial class OutboundOrderDetailService : ServiceBase<Dt_OutboundOrderDetail, IRepository<Dt_OutboundOrderDetail>>, IOutboundOrderDetailService
    {
        private readonly IUnitOfWorkManage _unitOfWorkManage;
        public IRepository<Dt_OutboundOrderDetail> Repository => BaseDal;

   
        private readonly IStockService _stockService;
        private readonly IOutStockLockInfoService _outStockLockInfoService;
        private readonly ILocationInfoService _locationInfoService;
        private readonly IBasicService _basicService;
        private readonly IRecordService _recordService;
        private readonly IOutboundOrderService _outboundOrderService;
        private readonly ILocationStatusChangeRecordService _locationStatusChangeRecordService;
        private readonly ILogger<OutboundOrderDetailService> _logger;
        public OutboundOrderDetailService(IRepository<Dt_OutboundOrderDetail> BaseDal, IUnitOfWorkManage unitOfWorkManage, IStockService stockService, IOutStockLockInfoService outStockLockInfoService, IBasicService basicService, IRecordService recordService, ILocationInfoService locationInfoService, ILocationStatusChangeRecordService locationStatusChangeRecordService, IOutboundOrderService outboundOrderService, ILogger<OutboundOrderDetailService> logger) : base(BaseDal)
        {
            _unitOfWorkManage = unitOfWorkManage;
            _stockService = stockService;
            _outStockLockInfoService = outStockLockInfoService;
            _basicService = basicService;
            _recordService = recordService;
            _locationInfoService = locationInfoService;
            _locationStatusChangeRecordService = locationStatusChangeRecordService;
            _outboundOrderService = outboundOrderService;
            _logger = logger;
        }


        /// <summary>
        /// 分配出库库存  按先进先出原则分配
        /// </summary>
        public (List<Dt_StockInfo>, List<Dt_OutboundOrderDetail>, List<Dt_OutStockLockInfo>, List<Dt_LocationInfo>) AssignStockOutbound(List<Dt_OutboundOrderDetail> outboundOrderDetails)
        {
            if (!outboundOrderDetails.Any())
            {
                throw new Exception("未找到出库单明细信息");
            }

            if (outboundOrderDetails.GroupBy(x => x.OrderId).Count() > 1)
            {
                throw new Exception("请勿同时操作多个单据明细");
            }

            var outboundOrder = _outboundOrderService.Db.Queryable<Dt_OutboundOrder>()
                .First(x => x.Id == outboundOrderDetails.First().OrderId);

            List<Dt_StockInfo> outStocks = new List<Dt_StockInfo>();
            List<Dt_OutStockLockInfo> outStockLockInfos = new List<Dt_OutStockLockInfo>();
            List<Dt_LocationInfo> locationInfos = new List<Dt_LocationInfo>();

            // 按物料和批次分组处理
            var groupDetails = outboundOrderDetails
                .GroupBy(x => new { x.MaterielCode, x.BatchNo })
                .Select(x => new
                {
                    MaterielCode = x.Key.MaterielCode,
                    BatchNo = x.Key.BatchNo,
                    Details = x.ToList(),
                    TotalNeedQuantity = x.Sum(v => v.OrderQuantity - v.OverOutQuantity - v.LockQuantity-v.MoveQty)
                })
                .Where(x => x.TotalNeedQuantity > 0)
                .ToList();

            foreach (var item in groupDetails)
            {
                var needQuantity = item.TotalNeedQuantity;

                // 获取可用库存（按先进先出排序）
                List<Dt_StockInfo> stockInfos = _stockService.StockInfoService.GetUseableStocks(item.MaterielCode, item.BatchNo);
                if (!stockInfos.Any())
                {
                    throw new Exception($"物料[{item.MaterielCode}]批次[{item.BatchNo}]未找到可分配库存");
                }

                // 分配库存（按先进先出）
                var (autoAssignStocks, stockAllocations) = _stockService.StockInfoService.GetOutboundStocks(
                    stockInfos, item.MaterielCode, needQuantity, out decimal residueQuantity);

                if (residueQuantity > 0 && residueQuantity == needQuantity)
                {
                    throw new Exception($"物料[{item.MaterielCode}]库存不足，需要{needQuantity}，可用{needQuantity - residueQuantity}");
                }

                outStocks.AddRange(autoAssignStocks);

                // 按先进先出原则分配锁定数量到各个明细
                DistributeLockQuantityByFIFO(item.Details, autoAssignStocks, stockAllocations, outStockLockInfos, outboundOrder);
            }

            locationInfos.AddRange(_locationInfoService.GetLocationInfos(outStocks.Select(x => x.LocationCode).Distinct().ToList()));

            return (outStocks, outboundOrderDetails, outStockLockInfos, locationInfos);
        }

        /// <summary>
        /// 按先进先出原则分配锁定数量到各个明细  
        /// </summary>
        private void DistributeLockQuantityByFIFO(
            List<Dt_OutboundOrderDetail> details,
            List<Dt_StockInfo> assignStocks,
            Dictionary<int, decimal> stockAllocations,
            List<Dt_OutStockLockInfo> outStockLockInfos,
            Dt_OutboundOrder outboundOrder)
        {
            // 按先进先出排序出库单明细（假设先创建的明细需要优先满足）
            var sortedDetails = details
                .Where(d => d.OrderQuantity - d.OverOutQuantity - d.LockQuantity -d.MoveQty> 0) // 只处理还需要分配的数量
                .OrderBy(x => x.Id)
                .ToList();

            if (!sortedDetails.Any()) return;

            // 获取所有分配了库存的明细，按先进先出排序
            var allocatedStockDetails = assignStocks
                .SelectMany(x => x.Details)
                .Where(x => stockAllocations.ContainsKey(x.Id))
                .OrderBy(x => x.CreateDate)
                .ThenBy(x => x.StockId)
                .ToList();

            // 为每个库存明细创建分配记录
            foreach (var stockDetail in allocatedStockDetails)
            {
                if (!stockAllocations.TryGetValue(stockDetail.Id, out decimal allocatedQuantity))
                    continue;

                if (allocatedQuantity <= 0) continue;

                var stockInfo = assignStocks.First(x => x.Id == stockDetail.StockId);
                decimal remainingAllocate = allocatedQuantity;

                // 按顺序分配给各个出库单明细
                foreach (var detail in sortedDetails)
                {
                    if (remainingAllocate <= 0) break;

                    // 计算这个明细还需要分配的数量
                    var detailNeed = detail.OrderQuantity - detail.OverOutQuantity - detail.LockQuantity;
                    if (detailNeed <= 0) continue;

                    // 分配数量
                    var assignQuantity = Math.Min(remainingAllocate, detailNeed);

                    // 验证条码是否存在
                    if (string.IsNullOrEmpty(stockDetail.Barcode))
                    {
                        throw new Exception($"库存明细ID[{stockDetail.Id}]的条码为空");
                    }

                    // 创建出库锁定信息
                    var lockInfo = _outStockLockInfoService.GetOutStockLockInfo(
                        outboundOrder, detail, stockInfo, assignQuantity, stockDetail.Barcode);
                    outStockLockInfos.Add(lockInfo);

                    // 更新明细的锁定数量
                    detail.LockQuantity += assignQuantity;
                    remainingAllocate -= assignQuantity;
                }

                // 如果还有剩余分配数量，重新分配或记录警告
                if (remainingAllocate > 0)
                {
                    // 重新分配给其他需要分配的明细
                    foreach (var detail in sortedDetails)
                    {
                        if (remainingAllocate <= 0) break;

                        var detailNeed = detail.OrderQuantity - detail.OverOutQuantity - detail.LockQuantity;
                        if (detailNeed <= 0) continue;

                        var assignQuantity = Math.Min(remainingAllocate, detailNeed);

                        var lockInfo = _outStockLockInfoService.GetOutStockLockInfo(
                            outboundOrder, detail, stockInfo, assignQuantity, stockDetail.Barcode);
                        outStockLockInfos.Add(lockInfo);

                        detail.LockQuantity += assignQuantity;
                        remainingAllocate -= assignQuantity;
                    }

                    // 如果还有剩余，记录警告但不抛出异常
                    if (remainingAllocate > 0)
                    {
                        _logger.LogWarning($"库存分配后仍有剩余数量未分配: {remainingAllocate}, 条码: {stockDetail.Barcode}");
                    }
                }
            }
        }

        /// <summary>
        /// 出库库存分配后，更新数据库数据
        /// </summary>
        /// <param name="stockInfos"></param>
        /// <param name="outboundOrderDetails"></param>
        /// <param name="outStockLockInfos"></param>
        /// <param name="locationInfos"></param>
        /// <param name="locationStatus"></param>
        /// <param name="tasks"></param>
        /// <returns></returns>
        public WebResponseContent LockOutboundStockDataUpdate(List<Dt_StockInfo> stockInfos, List<Dt_OutboundOrderDetail> outboundOrderDetails, 
            List<Dt_OutStockLockInfo> outStockLockInfos, List<Dt_LocationInfo> locationInfos, 
            LocationStatusEnum locationStatus = LocationStatusEnum.Lock, List<Dt_Task>? tasks = null)
        {
            try
            {
                // 更新库存状态
                stockInfos.ForEach(x => x.StockStatus = (int)StockStatusEmun.出库锁定);
                _stockService.StockInfoService.Repository.UpdateData(stockInfos);
 
                // 更新库存明细
                var stockDetails = stockInfos.SelectMany(x => x.Details).ToList();
                _stockService.StockInfoDetailService.Repository.UpdateData(stockDetails);
                BaseDal.UpdateData(outboundOrderDetails);

                List<Dt_OutStockLockInfo> addOutStockLockInfos = outStockLockInfos.Where(x => x.Id == 0).ToList();
                if (addOutStockLockInfos != null && addOutStockLockInfos.Any())
                {
                    if (tasks != null)
                    {
                        addOutStockLockInfos.ForEach(x =>
                        {
                            x.TaskNum = tasks.FirstOrDefault(v => v.PalletCode == x.PalletCode)?.TaskNum;
                        });
                    }

                    _outStockLockInfoService.Repository.AddData(addOutStockLockInfos);
                }
                List<Dt_OutStockLockInfo> updateOutStockLockInfos = outStockLockInfos.Where(x => x.Id > 0).ToList();
                if (updateOutStockLockInfos != null && updateOutStockLockInfos.Any())
                {
                    _outStockLockInfoService.Repository.UpdateData(updateOutStockLockInfos);
                }

                _locationStatusChangeRecordService.AddLocationStatusChangeRecord(locationInfos, locationStatus, LocationChangeType.OutboundAssignLocation, "", tasks?.Select(x => x.TaskNum).ToList());
                _locationInfoService.UpdateLocationStatus(locationInfos, locationStatus);
                return WebResponseContent.Instance.OK();
            }
            catch (Exception ex)
            {
                return WebResponseContent.Instance.Error(ex.Message);
            }
        }

    }
}