using FictionArchive.Service.Shared.Contracts.Events;
using FictionArchive.Service.UserNovelDataService.Models.Database;
using FictionArchive.Service.UserNovelDataService.Services;
using MassTransit;
using Microsoft.EntityFrameworkCore;

namespace FictionArchive.Service.UserNovelDataService.Consumers;

public class NovelCreatedConsumer : IConsumer<INovelCreated>
{
    private readonly ILogger<NovelCreatedConsumer> _logger;
    private readonly UserNovelDataServiceDbContext _dbContext;

    public NovelCreatedConsumer(
        ILogger<NovelCreatedConsumer> logger,
        UserNovelDataServiceDbContext dbContext)
    {
        _logger = logger;
        _dbContext = dbContext;
    }

    public async Task Consume(ConsumeContext<INovelCreated> context)
    {
        var message = context.Message;

        var exists = await _dbContext.Novels.AnyAsync(n => n.Id == message.NovelId);
        if (exists)
        {
            _logger.LogDebug("Novel {NovelId} already exists, skipping", message.NovelId);
            return;
        }

        var novel = new Novel { Id = message.NovelId };
        _dbContext.Novels.Add(novel);
        await _dbContext.SaveChangesAsync();

        _logger.LogInformation("Created novel stub for {NovelId}", message.NovelId);
    }
}