"""Authentication routes."""

from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.orm import Session
from app.database import get_db
from app.models import User
from app.schemas import UserRegister, UserLogin, TokenResponse, UserResponse
from app.auth import hash_password, verify_password, create_access_token

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


@router.post("/register", response_model=TokenResponse)
def register(user_data: UserRegister, db: Session = Depends(get_db)):
    """Register a new user."""
    # Check if user already exists
    existing_user = db.query(User).filter(
        (User.username == user_data.username) | (User.email == user_data.email)
    ).first()
    
    if existing_user:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="Username or email already registered"
        )
    
    # Create new user
    hashed_password = hash_password(user_data.password)
    new_user = User(
        username=user_data.username,
        email=user_data.email,
        hashed_password=hashed_password
    )
    db.add(new_user)
    db.commit()
    db.refresh(new_user)
    
    # Create access token
    access_token = create_access_token(data={"sub": new_user.id})
    
    return {
        "access_token": access_token,
        "token_type": "bearer",
        "user": UserResponse.from_orm(new_user)
    }


@router.post("/login", response_model=TokenResponse)
def login(user_data: UserLogin, db: Session = Depends(get_db)):
    """Login a user."""
    user = db.query(User).filter(User.username == user_data.username).first()
    
    if not user or not verify_password(user_data.password, user.hashed_password):
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Invalid username or password"
        )
    
    # Create access token
    access_token = create_access_token(data={"sub": user.id})
    
    return {
        "access_token": access_token,
        "token_type": "bearer",
        "user": UserResponse.from_orm(user)
    }