from fastapi import FastAPI, Depends
from pydantic import BaseModel
from sqlalchemy import create_engine, Column, Integer, String, Double
from sqlalchemy.orm import sessionmaker, Session
from sqlalchemy.ext.declarative import declarative_base

engine = create_engine('sqlite:///db.sqlite', connect_args={'check_same_thread': False})
SessionLocal = sessionmaker(engine)
Base = declarative_base()

class Employee(Base):
    __tablename__ = 'employees'
    id = Column(Integer, primary_key=True)
    name = Column(String)
    city = Column(String)
    salary = Column(Double)

Base.metadata.create_all(engine)

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

class EmployeeBase(BaseModel):
    name: str

app = FastAPI()

@app.post('/employees')
def index(employee: EmployeeBase, db: Session = Depends(get_db)):
    db_employee = Employee(name=employee.name)
    db.add(db_employee)
    db.commit()
    db.refresh(db_employee)
    return db_employee

@app.get('/employees')
def get_employees(db: Session = Depends(get_db)):
    employees = db.query(Employee).all()
    return {"employees": employees}