"""Public share links — viewing quiz info does not require a login."""
from fastapi import APIRouter, Depends, HTTPException
from sqlalchemy.orm import Session

from app.database import get_db
from app.models.quiz import Quiz
from app.models.user import User
from app.services.quiz_builder import category_breadcrumbs
from app.models.question_category import QuestionCategory
from app.utils.quiz_access import quiz_shareable_predicate

router = APIRouter()


@router.get("/{token}")
def get_shared_quiz(
    token: str,
    db: Session = Depends(get_db),
):
    """Public quiz landing data; never exposes questions or answers."""
    quiz = db.query(Quiz).filter(
        Quiz.share_token == token,
        Quiz.deleted_at.is_(None),
        Quiz.is_shared == 1,
    ).first()
    if not quiz or not db.query(Quiz.id).filter(
            Quiz.id == quiz.id, quiz_shareable_predicate()).first():
        raise HTTPException(404, "Shared quiz not found")
    owner = db.get(User, quiz.user_id) if quiz.user_id else None
    categories = db.query(QuestionCategory).all()
    return {
        "quiz_id": quiz.id,
        "title": quiz.title,
        "mode": quiz.mode,
        "questions_count": quiz.questions_count,
        "time_limit_minutes": quiz.time_limit_minutes,
        "owner_name": owner.name if owner else None,
        "category": quiz.category.name if quiz.category else None,
        "category_breadcrumbs": category_breadcrumbs(categories, quiz.category_id) if quiz.category_id else [],
    }