# -*- coding: utf-8 -*-

##########################################################################
# OpenLP - Open Source Lyrics Projection                                 #
# ---------------------------------------------------------------------- #
# Copyright (c) 2008-2022 OpenLP Developers                              #
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# This program is free software: you can redistribute it and/or modify   #
# it under the terms of the GNU General Public License as published by   #
# the Free Software Foundation, either version 3 of the License, or      #
# (at your option) any later version.                                    #
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# This program is distributed in the hope that it will be useful,        #
# but WITHOUT ANY WARRANTY; without even the implied warranty of         #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          #
# GNU General Public License for more details.                           #
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# You should have received a copy of the GNU General Public License      #
# along with this program.  If not, see <https://www.gnu.org/licenses/>. #
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"""
The :mod:`db` module provides the database and schema that is the backend for the Alerts plugin.
"""

from sqlalchemy import Column, Table, types
from sqlalchemy.orm import mapper

from openlp.core.lib.db import BaseModel, init_db


class AlertItem(BaseModel):
    """
    AlertItem model
    """
    pass


def init_schema(url):
    """
    Setup the alerts database connection and initialise the database schema

    :param url:
        The database to setup
    """
    session, metadata = init_db(url)

    alerts_table = Table('alerts', metadata,
                         Column('id', types.Integer(), primary_key=True),
                         Column('text', types.UnicodeText, nullable=False))

    mapper(AlertItem, alerts_table)

    metadata.create_all(checkfirst=True)
    return session