using System;
using System.Threading;
using System.Threading.Tasks;
using EntityFrameworkCore.Triggered;
using IRaCIS.Core.Domain.Models;

namespace IRaCIS.Core.Application.Triggers
{

    public class SoftDeleteTrigger : IBeforeSaveTrigger<ISoftDelete>
    {

        //Generator  Detached 状态才会进去  误用
        //modelBuilder.Entity(entityType.ClrType).Property(nameof(ISoftDelete.DeletedTime)).HasValueGenerator<DeleteTimeGenerator>().ValueGeneratedOnAddOrUpdate();
        public Task BeforeSave(ITriggerContext<ISoftDelete> context, CancellationToken cancellationToken)
        {
            if (context.ChangeType == ChangeType.Modified)
            {
                if (context.Entity.IsDeleted)
                {
                    context.Entity.DeletedTime=DateTime.UtcNow.AddHours(8);
                }
                else
                {
                    context.Entity.DeletedTime = null;
                }
            }

            return  Task.CompletedTask;
            
        }
    }
}