using System;
using System.Collections.Generic;

namespace BLL
{
    public class APITrainNumberManagerService
    {
        /// <summary>
        /// 车次发货验收
        /// </summary>
        /// <param name="id"></param>
        /// <param name="PersonId"></param>
        public static void SaveTrainInfoConfirmArrival(string id, string PersonId)
        {
            var model = TrainNumberManageService.GetModelById(id);
            if (model != null)
            {
                model.ReceiveDate = DateTime.Now;
                TrainNumberManageService.Update(model);
            }
            else
            {
                throw new Exception("车次信息有误，请检查!");
            }
            var packManagerList = HJGLPackagingmanageService.GetPackagingManage(id);
            foreach (var item in packManagerList)
            {
                BLL.APIPackagingManageService.GetPackingInfoConfirmArrival(item.PackagingManageId, PersonId);
            }
        }

        /// <summary>
        /// 获取指定车次的包装明细（包装表）
        /// </summary>
        public static List<Model.HJGL_PackagingManage> GetPackagingByTrainId(string trainNumberId)
        {
            return HJGLPackagingmanageService.GetPackagingManage(trainNumberId);
        }

        /// <summary>
        /// 将包装关联到车次（设置 HJGL_PackagingManage.TrainNumberId）
        /// </summary>
        public static void AddPackagingToTrain(string packagingManageId, string trainNumberId)
        {
            var packModel = HJGLPackagingmanageService.GetHJGL_PackagingManageById(packagingManageId);
            if (packModel == null)
            {
                throw new Exception("未找到对应的包装信息");
            }
            // 仅允许状态为未出库（state_0）时修改车次号，保持与前端逻辑一致
            if (packModel.State != HJGLPackagingmanageService.state_0)
            {
                throw new Exception("当前包装状态不可修改车次号");
            }
            packModel.TrainNumberId = trainNumberId;
            HJGLPackagingmanageService.UpdateHJGL_PackagingManage(packModel);
        }

        /// <summary>
        /// 取消包装与车次的关联（清空 HJGL_PackagingManage.TrainNumberId）
        /// </summary>
        public static void RemovePackagingFromTrain(string packagingManageId)
        {
            var packModel = HJGLPackagingmanageService.GetHJGL_PackagingManageById(packagingManageId);
            if (packModel == null)
            {
                throw new Exception("未找到对应的包装信息");
            }
            /*if (packModel.State != HJGLPackagingmanageService.state_0)
            {
                throw new Exception("当前包装状态不可修改车次号");
            }*/
            packModel.TrainNumberId = null;
            packModel.TrainNumber = null;
            HJGLPackagingmanageService.UpdateHJGL_PackagingManage(packModel);
        }

        /// <summary>
        /// 新增或更新车次信息。若 model.Id 为空则新增，否则修改。返回创建或更新后的Id。
        /// 新增时 State=0，ReceiveDate=null；修改时保持原有 State 和 ReceiveDate。
        /// </summary>
        public static string AddOrUpdateTrainNumber(Model.HJGL_TrainNumberManage model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }

            if (string.IsNullOrEmpty(model.Id))
            {
                // 新增
                model.Id = SQLHelper.GetNewID(typeof(Model.HJGL_TrainNumberManage));
                model.ReceiveDate = null;
                TrainNumberManageService.Add(model);
                return model.Id;
            }
            else
            {
                // 修改
                var exist = TrainNumberManageService.GetModelById(model.Id);
                if (exist == null)
                {
                    model.ReceiveDate = null;
                    TrainNumberManageService.Add(model);
                    return model.Id;
                }
                else
                {
                    // 保持原有ReceiveDate 
                    model.ReceiveDate = exist.ReceiveDate;
                    TrainNumberManageService.Update(model);
                    return model.Id;
                }
            }
        }
    }
}