using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

namespace Estsh.Core.Dapper
{
    public static class EntityExtensions
    {
        public static string? GetEntityColumnName(this Type type, string propertyName)
        {
            var entityProperty = type.GetProperties().FirstOrDefault(p => p.Name.ToLower() == propertyName.ToLower());
            if (entityProperty != null)
            {
                var entityColumn = entityProperty.GetCustomAttributes<ColumnAttribute>().FirstOrDefault();
                if (entityColumn != null)
                {
                    return entityColumn.Name;
                }
            }
            return propertyName;
        }

        public static string? GetEntityTableName(this Type type)
        {
            return type.GetCustomAttribute<TableAttribute>(false)?.Name;
        }

        /// <summary>
        /// 属性判断待完善
        /// </summary>
        /// <returns></returns>
        public static IEnumerable<PropertyInfo> GetEntityProperties(this Type type)
        {
            return type.GetProperties().Where(
                x => !x.PropertyType.IsGenericType 
                && x.PropertyType.GetInterface("IList") == null 
                || x.PropertyType.GetInterface("IEnumerable", false) == null); 
        }
    }
}