using MES.Service.DB;
using MES.Service.Dto.webApi;
using MES.Service.Modes;

namespace MES.Service.service.BasicData;

public class MesItemTypeManager : Repository<MesItemType>
{
    //当前类已经继承了 Repository 增、删、查、改的方法
    public bool Save(ErpItemType customer)
    {
        var entity = GetMesItemType(customer);

        try
        {
            switch (customer.Type)
            {
                case "2":
                case "4":
                    return InsertItemType(entity);
                case "3":
                    return DeleteItemType(entity.Id);
                default:
                    throw new ArgumentNullException(
                        $"type没有{customer.Type}这个类型的参数");
            }
        }
        catch (Exception ex)
        {
            throw new ApplicationException($"操作失败: {ex.Message}", ex);
        }
    }

    /// <summary>
    /// 生成新的ID，确保不重复
    /// </summary>
    private decimal GenerateNewId()
    {
        // 处理空表的情况，从1开始
        var maxId = Db.Queryable<MesItemType>().Max(x => (decimal?)x.Id) ?? 0;
        var newId = maxId + 1;
        
        // 双重检查，确保生成的ID不存在
        while (Db.Queryable<MesItemType>().Where(x => x.Id == newId).Any())
        {
            newId++;
        }
        
        return newId;
    }

    private bool InsertItemType(MesItemType entity)
    {
        if (entity.Id == 0)
        {
            // 新增情况：生成新ID并插入
            var newId = GenerateNewId();
            entity.Id = newId;
            return base.Insert(entity);
        }
        else
        {
            // 更新情况：删除后重新插入，保持原有ID
            var originalId = entity.Id;
            
            // 先删除原记录（如果存在）
            try
            {
                Db.Deleteable<MesItemType>()
                    .Where(it => it.Id == originalId).ExecuteCommand();
            }
            catch (Exception)
            {
                // 删除失败可能是因为记录不存在，继续执行插入操作
            }
            
            // 重新插入，保持原有ID
            entity.Id = originalId;
            return base.Insert(entity);
        }
    }

    private bool DeleteItemType(decimal? id)
    {
        var deleteById = Db.Deleteable<MesItemType>()
            .Where(it => it.Id == id).ExecuteCommand();
        if (deleteById > 0)
            return true;

        throw new NotImplementedException("删除失败");
    }

    private MesItemType GetMesItemType(ErpItemType department)
    {
        var entity = new MesItemType
        {
            Pgroup = department.FParentId,
            Tcode = department.FNumber,
            Tname = department.FName,
            Description = department.FDescription,
            CreateDate = DateTime.Now,
            LastupdateDate = DateTime.Now,
            Company = "1000",
            Factory = "1000"
        };

        // 查找是否已存在相同类型编码的记录
        var existingItemType = Db.Queryable<MesItemType>()
            .Where(it => it.Tcode == entity.Tcode)
            .First();

        if (existingItemType != null)
        {
            // 如果存在，使用现有的ID，后续将删除后重新插入
            entity.Id = existingItemType.Id;
        }
        else
        {
            // 如果不存在，设为0，InsertOrUpdate方法将生成新ID
            entity.Id = 0;
        }

        return entity;
    }

    public bool SaveList(List<ErpItemType> departments)
    {
        if (departments == null || !departments.Any())
        {
            Console.WriteLine("警告: 传入的列表为空");
            return false;
        }

        // 逐条处理，全部成功才返回true（事务内批量处理更优，此处保持原有逻辑）
        var result = departments.Select(Save).ToList();
        return result.All(b => b);
    }

    private bool InsertItemTypeBatch(List<MesItemType> itemTypeList)
    {
        var insertRange = base.InsertRange(itemTypeList);
        if (insertRange)
            return true;

        throw new NotImplementedException("插入失败");
    }

    private bool DeleteItemTypeBatch(List<MesItemType> itemTypeList)
    {
        var ids = itemTypeList.Select(it => it.Id).ToArray();

        var deleteByIds = Db.Deleteable<MesItemType>()
            .Where(s => ids.Contains(s.Id)).ExecuteCommand();

        if (deleteByIds > 0)
            return true;

        throw new NotImplementedException("删除失败");
    }
}