import os
from typing import Optional

import sqlalchemy
from sqlalchemy import Column
from sqlalchemy_utils import EncryptedType
from sqlalchemy_utils.types.encrypted.encrypted_type import AesEngine
from sqlmodel import create_engine, Field, Session, SQLModel


# https://sqlalchemy-utils.readthedocs.io/en/latest/_modules/sqlalchemy_utils/types/encrypted/encrypted_type.html#EncryptedType
class Hero(SQLModel, table=True):
    id: Optional[int] = Field(default=None, primary_key=True)
    name: str
    # Because the secret name should stay a secret
    secret_name: str = Field(
            sa_column=Column(
                    EncryptedType(
                            sqlalchemy.Unicode,
                            os.getenv('ENCRYPTION_KEY'),
                            AesEngine,
                            'pkcs5'
                            )
                    )
            )
    age: Optional[int] = None


sqlite_file_name = "database.db"
sqlite_url = f"sqlite:///{sqlite_file_name}"

engine = create_engine(sqlite_url, echo=True)


def create_db_and_tables():
    SQLModel.metadata.create_all(engine)


def create_heroes():
    hero_1 = Hero(name="Deadpond", secret_name="Dive Wilson")  #
    hero_2 = Hero(name="Spider-Boy", secret_name="Pedro Parqueador")  #
    hero_3 = Hero(name="Rusty-Man", secret_name="Tommy Sharp", age=48)  #

    print("Before interacting with the database")  #
    print("Hero 1:", hero_1)  #
    print("Hero 2:", hero_2)  #
    print("Hero 3:", hero_3)  #

    with Session(engine) as session:  #
        session.add(hero_1)  #
        session.add(hero_2)  #
        session.add(hero_3)  #

        print("After adding to the session")  #
        print("Hero 1:", hero_1)  #
        print("Hero 2:", hero_2)  #
        print("Hero 3:", hero_3)  #

        session.commit()  #

        print("After committing the session")  #
        print("Hero 1:", hero_1)  #
        print("Hero 2:", hero_2)  #
        print("Hero 3:", hero_3)  #

        print("After committing the session, show IDs")  #
        print("Hero 1 ID:", hero_1.id)  #
        print("Hero 2 ID:", hero_2.id)  #
        print("Hero 3 ID:", hero_3.id)  #

        print("After committing the session, show names")  #
        print("Hero 1 name:", hero_1.name)  #
        print("Hero 2 name:", hero_2.name)  #
        print("Hero 3 name:", hero_3.name)  #

        session.refresh(hero_1)  #
        session.refresh(hero_2)  #
        session.refresh(hero_3)  #

        print("After refreshing the heroes")  #
        print("Hero 1:", hero_1)  #
        print("Hero 2:", hero_2)  #
        print("Hero 3:", hero_3)  #
    #

    print("After the session closes")  #
    print("Hero 1:", hero_1)  #
    print("Hero 2:", hero_2)  #
    print("Hero 3:", hero_3)  #


def main():
    create_db_and_tables()
    create_heroes()


if __name__ == "__main__":
    main()