using Microsoft.EntityFrameworkCore.Metadata.Builders;
using Microsoft.EntityFrameworkCore.Metadata.Conventions;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace IRaCIS.Core.Infra.EFCore;

/// <summary>
/// 设置decimal 默认精度问题 （但是用ef迁移工具的时候，还是会提示No store type was specified for the decimal property，但是迁移文件里面体现了该配置，在dbcontext里写，那么就会没该警告）
/// </summary>
public class DecimalPrecisionConvention : IModelFinalizingConvention
{
    private readonly int _precision;
    private readonly int _scale;

    public DecimalPrecisionConvention(int precision, int scale)
    {
        _precision = precision;
        _scale = scale;
    }

    public void ProcessModelFinalizing(IConventionModelBuilder modelBuilder, IConventionContext<IConventionModelBuilder> context)
    {

        foreach (var property in modelBuilder.Metadata.GetEntityTypes()
                    .SelectMany(
                        entityType => entityType.GetDeclaredProperties()
                            .Where(
                                property => property.ClrType == typeof(decimal)  || property.ClrType == typeof(decimal?))))
        {


            // 设置精度和小数位数
            property.SetPrecision(_precision);
            property.SetScale(_scale);
        }
    }
}