from fastapi import Depends, HTTPException, status
from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
from sqlalchemy.orm import Session

from app.db.session import get_db
from app.core.security import verify_token
from app.models.user import User, UserRole

security = HTTPBearer()


def get_current_user(
    db: Session = Depends(get_db),
    credentials: HTTPAuthorizationCredentials = Depends(security),
) -> User:
    credentials_exception = HTTPException(
        status_code=status.HTTP_401_UNAUTHORIZED,
        detail="Could not validate credentials",
        headers={"WWW-Authenticate": "Bearer"},
    )

    token = credentials.credentials
    email = verify_token(token)

    if email is None:
        raise credentials_exception

    user = db.query(User).filter(User.email == email).first()
    if user is None:
        raise credentials_exception

    return user


def get_current_active_user(current_user: User = Depends(get_current_user)) -> User:
    if not current_user.is_active:
        raise HTTPException(status_code=400, detail="Inactive user")
    return current_user


def get_current_admin_user(
    current_user: User = Depends(get_current_active_user),
) -> User:
    if current_user.role not in [UserRole.ADMIN, UserRole.SUPER_ADMIN]:
        raise HTTPException(
            status_code=status.HTTP_403_FORBIDDEN, detail="Not enough permissions"
        )
    return current_user


def get_current_super_admin_user(
    current_user: User = Depends(get_current_active_user),
) -> User:
    if current_user.role != UserRole.SUPER_ADMIN:
        raise HTTPException(
            status_code=status.HTTP_403_FORBIDDEN, detail="Super admin access required"
        )
    return current_user