using MediatR;
using mws.backend.dotnet.application.Common;
using mws.backend.dotnet.application.Permissions;

namespace mws.backend.dotnet.application.Documents;

public record DeleteDocumentCommand(Guid UserId, Guid DocumentId) : IRequest;

public class DeleteDocumentHandler(IUnitOfWork uow) : IRequestHandler<DeleteDocumentCommand>
{
    public async Task Handle(DeleteDocumentCommand command, CancellationToken ct)
    {
        var doc = await DocumentAccess.GetDocumentForUserAsync(uow, command.UserId, command.DocumentId, ct);
        await DocumentAccess.EnsureDocumentPermissionAsync(uow, command.UserId, doc.ProjectId, PermissionAction.Delete, ct);

        await DocumentAccess.DeleteDescendantsAsync(uow, command.DocumentId, ct);
        uow.Documents.Remove(doc);
        await uow.SaveChangesAsync(ct);
    }
}