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

from app.core.response import error
from app.core.security import decode_access_token
from app.db.models import User
from app.db.session import get_db

bearer_scheme = HTTPBearer(auto_error=False)


def get_current_user(
    request: Request,
    credentials: HTTPAuthorizationCredentials | None = Depends(bearer_scheme),
    db: Session = Depends(get_db),
) -> User:
    if credentials is None or credentials.scheme.lower() != "bearer":
        raise HTTPException(
            status_code=401,
            detail=error(10001, "unauthorized", request.state.request_id),
        )
    try:
        payload = decode_access_token(credentials.credentials)
        user_id = int(payload["sub"])
    except Exception as exc:
        raise HTTPException(
            status_code=401,
            detail=error(10001, "invalid_token", request.state.request_id),
        ) from exc

    user = db.get(User, user_id)
    if not user or user.status != "active":
        raise HTTPException(
            status_code=401,
            detail=error(10001, "user_inactive", request.state.request_id),
        )
    return user


def require_staff(
    request: Request,
    user: User = Depends(get_current_user),
) -> User:
    if user.role in ("coach", "org_admin", "platform_admin"):
        return user
    from app.config import settings

    if settings.app_debug:
        return user
    raise HTTPException(
        status_code=403,
        detail=error(10009, "forbidden_staff_only", request.state.request_id),
    )