from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.orm import Session

from .. import auth, schemas
from ..database import get_db
from ..models import User

router = APIRouter(prefix="/auth", tags=["auth"])


@router.post("/signup", response_model=schemas.TokenResponse, status_code=status.HTTP_201_CREATED)
def signup(payload: schemas.SignupRequest, db: Session = Depends(get_db)):
    existing = db.query(User).filter(User.email == payload.email.lower()).first()
    if existing:
        raise HTTPException(status_code=status.HTTP_409_CONFLICT, detail="Email already registered")

    user = User(
        email=payload.email.lower(),
        hashed_password=auth.hash_password(payload.password),
        display_name=payload.display_name,
    )
    db.add(user)
    db.commit()
    db.refresh(user)

    token = auth.create_access_token(user.id)
    return schemas.TokenResponse(access_token=token)


@router.post("/login", response_model=schemas.TokenResponse)
def login(payload: schemas.LoginRequest, db: Session = Depends(get_db)):
    user = db.query(User).filter(User.email == payload.email.lower()).first()
    if not user or not auth.verify_password(payload.password, user.hashed_password):
        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid email or password")

    token = auth.create_access_token(user.id)
    return schemas.TokenResponse(access_token=token)


@router.get("/me", response_model=schemas.UserOut)
def me(current_user: User = Depends(auth.get_current_user)):
    return current_user