from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.orm import Session
from app.db.base import get_db
from app.schemas.user import UserCreate, UserLogin, UserResponse, Token
from app.models.user import User
from app.core.security import verify_password, get_password_hash, create_access_token
from app.core.deps import get_current_user

router = APIRouter()

@router.post("/register", response_model=UserResponse)
def register(user: UserCreate, db: Session = Depends(get_db)):
    # Check if user exists
    existing_user = db.query(User).filter(User.email == user.email).first()
    if existing_user:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="Email already registered"
        )
    
    # Create new user
    db_user = User(
        email=user.email,
        password_hash=get_password_hash(user.password)
    )
    db.add(db_user)
    db.commit()
    db.refresh(db_user)
    
    return db_user

@router.post("/login", response_model=Token)
def login(user: UserLogin, db: Session = Depends(get_db)):
    # Find user
    db_user = db.query(User).filter(User.email == user.email).first()
    if not db_user or not verify_password(user.password, db_user.password_hash):
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Incorrect email or password"
        )
    
    # Create access token
    access_token = create_access_token(data={"sub": str(db_user.id)})
    
    return {"access_token": access_token, "token_type": "bearer"}

@router.get("/me", response_model=UserResponse)
def get_me(current_user: User = Depends(get_current_user)):
    return current_user