using FastEndpoints;
using MetaCourse.Api.Data;
using Microsoft.EntityFrameworkCore;

namespace MetaCourse.Api.Endpoints.Topics;

public class UnlinkResourceRequest
{
    public Guid TopicId { get; set; }
    public Guid ResourceId { get; set; }
}

public class UnlinkResourceFromTopicEndpoint(AppDbContext db) : Endpoint<UnlinkResourceRequest>
{
    public override void Configure()
    {
        Delete("api/topics/{topicId}/resources/{resourceId}");
        AllowAnonymous();
        Summary(s => s.Summary = "Dissocie une ressource d'un sujet");
    }

    public override async Task HandleAsync(UnlinkResourceRequest req, CancellationToken ct)
    {
        var link = await db.TopicResources
            .FirstOrDefaultAsync(tr => tr.TopicId == req.TopicId && tr.ResourceId == req.ResourceId, ct);

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

        db.TopicResources.Remove(link);
        await db.SaveChangesAsync(ct);
        await SendNoContentAsync(ct);
    }
}