from datetime import datetime, timedelta

from app.schemas import *
from database import SessionLocal
from database.models import *


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


def instantiate_model(model, data):
    table = eval(model)
    instance = table(**data.dict())
    return instance


def insert_data(model, data, db):
    item = instantiate_model(model=model, data=data)
    db.add(item)
    db.commit()
    db.refresh(item)
    return item


# FIXME db.id has to be replaced with the table's UID
def delete_data(model, data, db):
    item = instantiate_model(model=model, data=data)
    result = db.query(item).filter(item.email == data.email).delete()
    return result


def fetch_user(data, db):
    result = db.query(Users).filter(Users.email == data.email).first()
    return result


def fetch_otp(access_key, db):
    result = db.query(Users).filter(Users.access_key == access_key).first()
    return result.otp


def activate_account(data: OTPVerify, db):
    db.query(Users).filter(Users.access_key == data.access_key).update(
        {Users.status: 1}
    )
    db.commit()


def verify_otp(data: OTPVerify, db):
    user = fetch_otp(data=data, db=db)
    same_otp = user.otp == data.otp
    valid_time = datetime.now() <= user.otp_valid_time
    valid_otp = same_otp and valid_time
    if valid_otp:
        activate_account(data=data, db=db)
        return True
    return False