from typing import List

from fastapi import Depends, FastAPI, HTTPException
from sqlalchemy.orm import Session

import crud
from database import SessionLocal, engine
from models import Base
from schemas import users

app = FastAPI()

Base.metadata.create_all(bind=engine)


def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()


@app.get("/")
async def root():
    return {"message": "Hello world!"}


@app.post("/users", response_model=users.User)
async def create_user(user: users.UserCreate, db: Session = Depends(get_db)):
    db_user = crud.get_user_by_username(db, username=user.username)
    if db_user:
        raise HTTPException(status_code=400, detail="Username already registered")
    return crud.create_user(db=db, user=user)


@app.get("/users", response_model=List[users.User])
async def read_users(db: Session = Depends(get_db)):
    users = crud.get_users(db)
    return users