using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Options;
using System;
using System.Collections.Generic;
using System.Linq;
using Volo.Abp.DependencyInjection;

namespace Sanhe.Abp.Notifications;

public class NotificationPublishProviderManager : INotificationPublishProviderManager, ISingletonDependency
{
    public List<INotificationPublishProvider> Providers => _lazyProviders.Value;

    protected AbpNotificationsOptions Options { get; }

    private readonly Lazy<List<INotificationPublishProvider>> _lazyProviders;

    public NotificationPublishProviderManager(
        IServiceProvider serviceProvider,
        IOptions<AbpNotificationsOptions> optionsAccessor)
    {
        Options = optionsAccessor.Value;

        _lazyProviders = new Lazy<List<INotificationPublishProvider>>(
            () => Options
                .PublishProviders
                .Select(type => serviceProvider.GetRequiredService(type) as INotificationPublishProvider)
                .ToList(),
            true
        );
    }
}