import sqlite3

CREATE_SERVICES_TABLE = '''CREATE TABLE IF NOT EXISTS services (
service_id INTEGER PRIMARY KEY,
token TEXT NOT NULL,
name TEXT NOT NULL,
description TEXT DEFAULT "Нет описания.",
representation INTEGER DEFAULT 0,
by_request INTEGER DEFAULT 0
);'''

CREATE_NOTIFICATIONS_TABLE = '''CREATE TABLE IF NOT EXISTS notifications ( 
notification_id INTEGER PRIMARY KEY,
service_id INTEGER NOT NULL,
timestamp TEXT NOT NULL,
content_json TEXT NOT NULL,
FOREIGN KEY (service_id) REFERENCES services(service_id) 
ON UPDATE CASCADE ON DELETE CASCADE
);'''


def create_tables_if_not_exists(dbfile: str) -> None:
    connection = sqlite3.connect(dbfile)
    cursor = connection.cursor()
    cursor.execute('PRAGMA foreign_keys=0')
    cursor.execute(CREATE_SERVICES_TABLE)
    cursor.execute(CREATE_NOTIFICATIONS_TABLE)
    connection.commit()
    connection.close()