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

from app.utils.security import decode_access_token

security = HTTPBearer(auto_error=False)


async def get_current_user_id(
    credentials: HTTPAuthorizationCredentials | None = Depends(security),
) -> int:
    if credentials is None:
        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Missing token")

    try:
        payload = decode_access_token(credentials.credentials)
    except JWTError as exc:
        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid token") from exc

    if payload.get("token_type") not in (None, "access"):
        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid token type")

    user_id = payload.get("user_id")
    if not user_id:
        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid token payload")
    return int(user_id)


async def get_optional_current_user_id(
    credentials: HTTPAuthorizationCredentials | None = Depends(security),
) -> int | None:
    if credentials is None:
        return None

    try:
        payload = decode_access_token(credentials.credentials)
    except JWTError:
        return None

    if payload.get("token_type") not in (None, "access"):
        return None

    user_id = payload.get("user_id")
    return int(user_id) if user_id else None


async def get_current_admin(
    credentials: HTTPAuthorizationCredentials | None = Depends(security),
) -> dict:
    if credentials is None:
        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Missing token")

    try:
        payload = decode_access_token(credentials.credentials)
    except JWTError as exc:
        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid token") from exc

    admin_id = payload.get("admin_id")
    if not admin_id:
        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid admin token")

    return payload


async def require_super_admin(admin_payload: dict = Depends(get_current_admin)) -> dict:
    if int(admin_payload.get("role", 0)) != 2:
        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="Super admin required")
    return admin_payload