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

from app.dependencies import get_current_user, get_db
from app.models.user import User
from app.schemas.auth import LoginRequest, SignupRequest, TokenResponse
from app.schemas.user import UserRead
from app.services.auth_service import (
    authenticate_user,
    build_token_response,
    create_user,
)


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


@router.post("/signup", response_model=TokenResponse, status_code=status.HTTP_201_CREATED)
def signup(payload: SignupRequest, db: Session = Depends(get_db)) -> TokenResponse:
    try:
        user = create_user(db, payload)
    except ValueError as exc:
        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(exc)) from exc

    return build_token_response(user)


@router.post("/login", response_model=TokenResponse)
def login(payload: LoginRequest, db: Session = Depends(get_db)) -> TokenResponse:
    try:
        user = authenticate_user(db, payload)
    except ValueError as exc:
        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail=str(exc)) from exc

    return build_token_response(user)


@router.get("/me", response_model=UserRead)
def read_me(current_user: User = Depends(get_current_user)) -> User:
    return current_user