from fastapi import Depends, HTTPException, status
from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer

from app.core.jwt_denylist import validate_access_claims
from app.core.security import decode_access_token
from app.modules.users.repository import get_user_by_id

bearer = HTTPBearer(auto_error=False)


def get_current_user(credentials: HTTPAuthorizationCredentials | None = Depends(bearer)):
    if credentials is None:
        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="UNAUTHORIZED")
    try:
        payload = decode_access_token(credentials.credentials)
        validate_access_claims(payload)
    except ValueError as exc:
        detail = str(exc)
        if detail == "TOKEN_REVOKED":
            raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="TOKEN_REVOKED")
        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="INVALID_TOKEN") from exc
    except Exception as exc:  # pragma: no cover - defensive
        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="INVALID_TOKEN") from exc
    user = get_user_by_id(payload["sub"])
    if not user:
        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="UNAUTHORIZED")
    if user.status == "pending":
        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="EMAIL_NOT_VERIFIED")
    if user.status == "blocked":
        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="ACCOUNT_BLOCKED")
    return user


def require_admin(user=Depends(get_current_user)):
    if user.role != "admin":
        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="ADMIN_ONLY")
    return user


def require_superuser(user=Depends(get_current_user)):
    if user.role != "admin":
        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="ADMIN_ONLY")
    if not user.is_superuser:
        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="SUPERUSER_ONLY")
    return user