using Microsoft.Extensions.DependencyInjection;
using System;

namespace LubanHub.Core.Attributes;

/// <summary>
/// 服务注册特性，用于标记需要自动注册到DI容器的服务
/// </summary>
[AttributeUsage(AttributeTargets.Class, AllowMultiple = false)]
public class RegistServiceAttribute : Attribute
{
    /// <summary>
    /// 服务生命周期
    /// </summary>
    public ServiceLifetime Lifetime { get; set; } = ServiceLifetime.Singleton;
    
    /// <summary>
    /// 服务接口类型，如果不指定则自动推断
    /// </summary>
    public Type? ServiceType { get; set; }
    
    /// <summary>
    /// 服务注册优先级，数值越小优先级越高
    /// </summary>
    public int Priority { get; set; } = 0;

    /// <summary>
    /// 初始化服务注册特性
    /// </summary>
    /// <param name="lifetime">服务生命周期</param>
    /// <param name="serviceType">服务接口类型</param>
    public RegistServiceAttribute(ServiceLifetime lifetime = ServiceLifetime.Singleton, Type? serviceType = null)
    {
        Lifetime = lifetime;
        ServiceType = serviceType;
    }
}