using Microsoft.Extensions.DependencyInjection;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

namespace Wood.Service.Controllers.RegistService
{
    public static class ServiceCollectionExtensions
    {
        // 批量注册接口及其实现类（接口以I开头，实现类与接口同名去掉I）
        public static IServiceCollection AddServicesByConvention(this IServiceCollection services, Assembly assembly)
        {
            var implementationTypes = assembly.GetTypes()
                .Where(t => t.IsClass && !t.IsAbstract && !t.IsGenericType);

            foreach (var implementationType in implementationTypes)
            {
                var interfaces = implementationType.GetInterfaces()
                    .Where(i => i.Name == "I" + implementationType.Name);

                foreach (var @interface in interfaces)
                {
                    services.AddScoped(@interface, implementationType);
                }
            }

            return services;
        }

        // 批量注册特定接口的所有实现类
        public static IServiceCollection AddImplementationsOf<TInterface>(this IServiceCollection services, Assembly assembly, ServiceLifetime lifetime = ServiceLifetime.Scoped)
        {
            var interfaceType = typeof(TInterface);
            var implementationTypes = assembly.GetTypes()
                .Where(t => !t.IsInterface && !t.IsAbstract && interfaceType.IsAssignableFrom(t));

            foreach (var implementationType in implementationTypes)
            {
                services.Add(new ServiceDescriptor(interfaceType, implementationType, lifetime));
            }

            return services;
        }
    }
}