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

from __future__ import unicode_literals

from unittest import TestCase

from mock import patch

from sqlalchemy.orm import sessionmaker
from sqlalchemy.engine import Engine

from edbob.configuration import AppConfigParser

from rattail import db
from rattail.db.util import configure_session_factory


class TestConfigureSessionFactory(TestCase):

    def setUp(self):
        self.config = AppConfigParser(u'rattail')
        self.config.add_section(u'rattail.db')
        self.Session = sessionmaker()

    def test_session_is_not_bound_if_no_engine_is_defined_by_config(self):
        configure_session_factory(self.config, self.Session)
        session = self.Session()
        self.assertTrue(session.bind is None)
        session.close()

    def test_session_is_correctly_bound_if_engine_is_defined_by_config(self):
        self.config.set(u'rattail.db', u'sqlalchemy.url', u'sqlite:////a/very/custom/db')
        session = self.Session()
        self.assertTrue(session.bind is None)
        session.close()
        configure_session_factory(self.config, self.Session)
        session = self.Session()
        self.assertTrue(isinstance(session.bind, Engine))
        self.assertEqual(unicode(session.bind.url), u'sqlite:////a/very/custom/db')
        session.close()

    def test_global_session_is_configured_by_default(self):
        self.config.set(u'rattail.db', u'sqlalchemy.url', u'sqlite:////path/to/rattail.sqlite')
        session = db.Session()
        self.assertTrue(session.bind is None)
        session.close()
        configure_session_factory(self.config)
        session = db.Session()
        self.assertTrue(isinstance(session.bind, Engine))
        self.assertEqual(unicode(session.bind.url), u'sqlite:////path/to/rattail.sqlite')
        session.close()
        # Must undo that configuration, this thing is global.
        db.Session.configure(bind=None)

    @patch(u'rattail.db.changes.record_changes')
    def test_changes_will_not_be_recorded_by_default(self, record_changes):
        self.config.set(u'rattail.db', u'sqlalchemy.url', u'sqlite://')
        configure_session_factory(self.config, self.Session)
        self.assertFalse(record_changes.called)

    @patch('rattail.db.util.record_changes')
    def test_changes_will_be_recorded_by_so_configured(self, record_changes):
        self.config.set(u'rattail.db', u'sqlalchemy.url', u'sqlite://')
        self.config.set(u'rattail.db', u'changes.record', u'true')
        configure_session_factory(self.config, self.Session)
        # Role changes are ignored by default.
        record_changes.assert_called_once_with(self.Session, True)

    @patch('rattail.db.util.record_changes')
    def test_changes_will_still_be_recorded_with_deprecated_config(self, record_changes):
        self.config.set(u'rattail.db', u'sqlalchemy.url', u'sqlite://')
        self.config.set(u'rattail.db', u'changes.record', u'true')
        configure_session_factory(self.config, self.Session)
        # Role changes are ignored by default.
        record_changes.assert_called_once_with(self.Session, True)

    @patch('rattail.db.util.record_changes')
    def test_config_determines_if_role_changes_are_ignored(self, record_changes):
        self.config.set(u'rattail.db', u'sqlalchemy.url', u'sqlite://')
        self.config.set(u'rattail.db', u'changes.record', u'true')
        self.config.set(u'rattail.db', u'changes.ignore_roles', u'false')
        configure_session_factory(self.config, self.Session)
        # Role changes are ignored by default; False means config works.
        record_changes.assert_called_once_with(self.Session, False)