using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using Oms.Application.Messaging;

namespace Oms.Application.Workers;

/// <summary>
/// 轮询已提交的创单后置步骤。进程在事务提交后、步骤执行前退出时，靠这里补跑。
/// </summary>
public sealed class OrderSideEffectWorker(
    IServiceScopeFactory scopeFactory,
    ILogger<OrderSideEffectWorker> logger) : BackgroundService
{
    private static readonly TimeSpan PollInterval = TimeSpan.FromSeconds(2);

    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
    {
        while (!stoppingToken.IsCancellationRequested)
        {
            try
            {
                await OrderSideEffectExecutor.RecoverStuckForecastAsync(scopeFactory, logger, stoppingToken);
                await OrderSideEffectExecutor.ProcessDueAsync(scopeFactory, logger, stoppingToken);
            }
            catch (Exception ex) when (ex is not OperationCanceledException)
            {
                logger.LogError(ex, "创单后置步骤轮询失败");
            }

            try
            {
                await Task.Delay(PollInterval, stoppingToken);
            }
            catch (OperationCanceledException)
            {
                break;
            }
        }
    }
}