using Microsoft.EntityFrameworkCore;
using PaperlessAI.Context;
using PaperlessAI.Models;
using PaperlessAI.Services;

namespace PaperlessAI.Jobs;

public class CheckDocumentsToProcessJob(ILogger<CheckDocumentsToProcessJob> logger, IServiceScopeFactory scopeFactory) : BackgroundService
{
    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
    {
        await using var scope = scopeFactory.CreateAsyncScope();
        var config = scope.ServiceProvider.GetRequiredService<Configuration>();

        using var timer = new PeriodicTimer(TimeSpan.FromSeconds(config.CheckDocumentsToProcessJobPeriodSeconds));

        do
        {
            await DoWork(stoppingToken);
        }
        while(await timer.WaitForNextTickAsync(stoppingToken));
    }

    private async Task DoWork(CancellationToken stoppingToken)
    {
        logger.LogInformation("Working");

        await using var scope = scopeFactory.CreateAsyncScope();
        var context = scope.ServiceProvider.GetRequiredService<MyDbContext>();
        var documentProcessingService = scope.ServiceProvider.GetRequiredService<DocumentProcessingService>();

        var docsToProcess = await context
            .PaperlessDocuments
            .Where(x => x.DocumentState == Enums.EDocumentState.Created)
            .OrderBy(x => x.CreatedAt)
            .ToListAsync();

        await documentProcessingService.Enqueue(docsToProcess);
        await documentProcessingService.Process();
    }
}