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

namespace Tiobon.Core.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()
    {
        if (AppSettings.app(new string[] { "EventBus", "Enabled" }).ObjToBool())
        {
            var eventBus = _serviceProvider.GetRequiredService<IEventBus>();
            eventBus.Subscribe<TiobonQueryIntegrationEvent, TiobonQueryIntegrationEventHandler>();
        }
        return Task.CompletedTask;
    }

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