using System;
using System.Threading;
using System.Threading.Tasks;
using EntrustSettle.Common;
using EntrustSettle.EventBus;
using EntrustSettle.EventBus.EventHandling;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;

namespace EntrustSettle.Extensions.HostedService;

public class EventBusHostedService : IHostedService
{
    private readonly IServiceProvider _serviceProvider;
    private readonly ILogger<EventBusHostedService> _logger;

    public EventBusHostedService(IServiceProvider serviceProvider, ILogger<EventBusHostedService> logger)
    {
        _serviceProvider = serviceProvider;
        _logger = logger;
    }

    public async Task StartAsync(CancellationToken cancellationToken)
    {
        _logger.LogInformation("Start EventBus Service!");
        await DoWork();
    }

    private Task DoWork()
    {
        var eventBus = _serviceProvider.GetRequiredService<IEventBus>();
        eventBus.Subscribe<BlogQueryIntegrationEvent, BlogQueryIntegrationEventHandler>();
        return Task.CompletedTask;
    }

    public Task StopAsync(CancellationToken cancellationToken)
    {
        _logger.LogInformation("Stop EventBus Service!");
        return Task.CompletedTask;
    }
}