using AutoMapper;
using FastEndpoints;
using MetaCourse.Api.Data;
using MetaCourse.Api.DTOs.Topics;
using Microsoft.EntityFrameworkCore;

namespace MetaCourse.Api.Endpoints.Topics;

public class GetTopicRequest
{
    public Guid Id { get; set; }
}

public class GetTopicEndpoint(AppDbContext db, AutoMapper.IMapper mapper) : Endpoint<GetTopicRequest, GetTopicDto>
{
    public override void Configure()
    {
        Get("api/topics/{id}");
        AllowAnonymous();
        Summary(s => s.Summary = "Récupère un sujet avec ses ressources");
    }

    public override async Task HandleAsync(GetTopicRequest req, CancellationToken ct)
    {
        var topic = await db.Topics
            .AsNoTracking()
            .Include(t => t.TopicResources.OrderBy(tr => tr.Position))
                .ThenInclude(tr => tr.Resource)
            .FirstOrDefaultAsync(t => t.Id == req.Id, ct);

        if (topic is null)
        {
            await SendNotFoundAsync(ct);
            return;
        }

        await SendOkAsync(mapper.Map<GetTopicDto>(topic), ct);
    }
}