from fastapi import Depends
from datetime import datetime
from pydoc import locate

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(schema, data):
    model = locate("database.models." + schema)
    instance = model(**data)
    return instance


def insert_data(schema, data, db: Session = Depends(get_db)):
    item = instantiate_model(schema=schema, data=data)
    db.add(item)
    db.commit()


# FIXME db.id has to be replaced with the table's UID
def delete_data(schema, data, db: Session = Depends(get_db)):
    model = schema.replace('"', "")
    result = db.query(model).filter(model.email == data.email).delete()
    return result


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


def fetch_otp(data: OTPSchema, db: Session = Depends(get_db)):
    result = db.query(Users).filter(Users.access_key == data.access_key).first()
    return result


def save_otp(data: OTPSchema, db: Session = Depends(get_db)):
    db.query(Users).filter(Users.access_key == data.access_key).update(
        {Users.otp: data.otp}
    )
    db.commit()


def activate_account(data: OTPSchema, db: Session = Depends(get_db)):
    timestamp = datetime.now()
    db.query(Users).filter(Users.access_key == data.access_key).update(
        {Users.otp_valid_time: timestamp, Users.status: 1}
    )
    db.commit()


def verify_otp(data: OTPSchema):
    user = fetch_otp(data=data)
    if user.otp == data.otp:
        activate_account(data)
        return True
    return False