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

from unittest import TestCase

from wuttjamaican import auth as mod
from wuttjamaican.conf import WuttaConfig

try:
    import sqlalchemy as sa
except ImportError:
    pass
else:


    class TestAuthHandler(TestCase):

        def setUp(self):
            self.config = WuttaConfig()
            self.app = self.config.get_app()
            self.handler = mod.AuthHandler(self.config)

            self.engine = sa.create_engine('sqlite://')
            self.app.model.Base.metadata.create_all(bind=self.engine)
            self.session = self.make_session()

        def tearDown(self):
            self.session.close()
            self.app.model.Base.metadata.drop_all(bind=self.engine)

        def make_session(self):
            return self.app.make_session(bind=self.engine)

        def test_authenticate_user(self):
            model = self.app.model
            barney = model.User(username='barney')
            self.handler.set_user_password(barney, 'goodpass')
            self.session.add(barney)
            self.session.commit()

            # login ok
            user = self.handler.authenticate_user(self.session, 'barney', 'goodpass')
            self.assertIs(user, barney)

            # can also pass user instead of username
            user = self.handler.authenticate_user(self.session, barney, 'goodpass')
            self.assertIs(user, barney)

            # bad password
            user = self.handler.authenticate_user(self.session, 'barney', 'BADPASS')
            self.assertIsNone(user)

            # bad username
            user = self.handler.authenticate_user(self.session, 'NOBODY', 'goodpass')
            self.assertIsNone(user)

            # inactive user
            user = self.handler.authenticate_user(self.session, 'barney', 'goodpass')
            self.assertIs(user, barney)
            barney.active = False
            user = self.handler.authenticate_user(self.session, 'barney', 'goodpass')
            self.assertIsNone(user)

        def test_check_user_password(self):
            model = self.app.model
            barney = model.User(username='barney')
            self.handler.set_user_password(barney, 'goodpass')
            self.session.add(barney)
            self.session.commit()

            # basics
            self.assertTrue(self.handler.check_user_password(barney, 'goodpass'))
            self.assertFalse(self.handler.check_user_password(barney, 'BADPASS'))

        def test_get_role(self):
            model = self.app.model
            myrole = model.Role(name="My Role")
            self.session.add(myrole)
            self.session.commit()

            # empty key is ignored
            role = self.handler.get_role(self.session, None)
            self.assertIsNone(role)

            # key may be uuid
            role = self.handler.get_role(self.session, myrole.uuid)
            self.assertIs(role, myrole)

            # key may be name
            role = self.handler.get_role(self.session, myrole.name)
            self.assertIs(role, myrole)

            # key may be represented within a setting
            self.config.usedb = True
            role = self.handler.get_role(self.session, 'mykey')
            self.assertIsNone(role)
            setting = model.Setting(name='wutta.role.mykey', value=myrole.uuid)
            self.session.add(setting)
            self.session.commit()
            role = self.handler.get_role(self.session, 'mykey')
            self.assertIs(role, myrole)

        def test_get_user(self):
            model = self.app.model
            myuser = model.User(username='myuser')
            self.session.add(myuser)
            self.session.commit()

            # empty obj is ignored
            user = self.handler.get_user(None)
            self.assertIsNone(user)

            # user is returned as-is
            user = self.handler.get_user(myuser)
            self.assertIs(user, myuser)

            # match on User.uuid
            user = self.handler.get_user(myuser.uuid, session=self.session)
            self.assertIs(user, myuser)

            # match on User.username
            user = self.handler.get_user(myuser.username, session=self.session)
            self.assertIs(user, myuser)

            # find user from person
            myperson = model.Person(full_name='My Name')
            self.session.add(myperson)
            user.person = myperson
            self.session.commit()
            user = self.handler.get_user(myperson)
            self.assertIs(user, myuser)

        def test_make_user(self):
            model = self.app.model

            # empty user
            user = self.handler.make_user()
            self.assertIsInstance(user, model.User)
            self.assertIsNone(user.username)

            # user is added to session
            user = self.handler.make_user(session=self.session)
            self.assertIn(user, self.session)
            self.session.rollback()
            self.assertNotIn(user, self.session)

            # default username
            # nb. this behavior requires a session
            user = self.handler.make_user(session=self.session)
            self.assertEqual(user.username, 'newuser')

        def test_delete_user(self):
            model = self.app.model

            # basics
            myuser = model.User(username='myuser')
            self.session.add(myuser)
            self.session.commit()
            user = self.session.query(model.User).one()
            self.assertIs(user, myuser)
            self.handler.delete_user(user)
            self.session.commit()
            self.assertEqual(self.session.query(model.User).count(), 0)

        def test_make_preferred_username(self):
            model = self.app.model

            # default
            name = self.handler.make_preferred_username(self.session)
            self.assertEqual(name, 'newuser')

            # person/first+last
            person = model.Person(first_name='Barney', last_name='Rubble')
            name = self.handler.make_preferred_username(self.session, person=person)
            self.assertEqual(name, 'barney.rubble')

            # person/first
            person = model.Person(first_name='Barney')
            name = self.handler.make_preferred_username(self.session, person=person)
            self.assertEqual(name, 'barney')

            # person/last
            person = model.Person(last_name='Rubble')
            name = self.handler.make_preferred_username(self.session, person=person)
            self.assertEqual(name, 'rubble')

        def test_make_unique_username(self):
            model = self.app.model

            # default
            name = self.handler.make_unique_username(self.session)
            self.assertEqual(name, 'newuser')
            user = model.User(username=name)
            self.session.add(user)
            self.session.commit()

            # counter invoked if name exists
            name = self.handler.make_unique_username(self.session)
            self.assertEqual(name, 'newuser01')
            user = model.User(username=name)
            self.session.add(user)
            self.session.commit()

            # starts by getting preferred name
            person = model.Person(first_name='Barney', last_name='Rubble')
            name = self.handler.make_unique_username(self.session, person=person)
            self.assertEqual(name, 'barney.rubble')
            user = model.User(username=name)
            self.session.add(user)
            self.session.commit()

            # counter invoked if name exists
            name = self.handler.make_unique_username(self.session, person=person)
            self.assertEqual(name, 'barney.rubble01')

        def test_set_user_password(self):
            model = self.app.model
            myuser = model.User(username='myuser')
            self.session.add(myuser)

            # basics
            self.assertIsNone(myuser.password)
            self.handler.set_user_password(myuser, 'goodpass')
            self.session.commit()
            self.assertIsNotNone(myuser.password)
            # nb. password is hashed
            self.assertNotEqual(myuser.password, 'goodpass')

            # confirm login works with new password
            user = self.handler.authenticate_user(self.session, 'myuser', 'goodpass')
            self.assertIs(user, myuser)

        def test_get_role_administrator(self):
            model = self.app.model

            self.assertEqual(self.session.query(model.Role).count(), 0)
            role = self.handler.get_role_administrator(self.session)
            self.assertEqual(self.session.query(model.Role).count(), 1)
            self.assertEqual(role.name, "Administrator")

        def test_get_role_anonymous(self):
            model = self.app.model

            self.assertEqual(self.session.query(model.Role).count(), 0)
            role = self.handler.get_role_anonymous(self.session)
            self.assertEqual(self.session.query(model.Role).count(), 1)
            self.assertEqual(role.name, "Anonymous")

        def test_get_role_authenticated(self):
            model = self.app.model

            self.assertEqual(self.session.query(model.Role).count(), 0)
            role = self.handler.get_role_authenticated(self.session)
            self.assertEqual(self.session.query(model.Role).count(), 1)
            self.assertEqual(role.name, "Authenticated")

        def test_user_is_admin(self):
            model = self.app.model

            # non-user is not admin
            self.assertFalse(self.handler.user_is_admin(None))

            # new user but not yet admin
            user = self.handler.make_user(session=self.session)
            self.session.commit()
            self.assertFalse(self.handler.user_is_admin(user))

            # but we can make them an admin
            admin = self.handler.get_role_administrator(self.session)
            user.roles.append(admin)
            self.session.commit()
            self.assertTrue(self.handler.user_is_admin(user))

        def test_get_permissions(self):
            model = self.app.model

            # empty default for role
            role = model.Role()
            perms = self.handler.get_permissions(self.session, role)
            self.assertIsInstance(perms, set)
            self.assertEqual(len(perms), 0)

            # empty default for user
            user = model.User()
            perms = self.handler.get_permissions(self.session, user)
            self.assertIsInstance(perms, set)
            self.assertEqual(len(perms), 0)

            # role perms
            myrole = model.Role(name='My Role')
            self.session.add(myrole)
            self.handler.grant_permission(myrole, 'foo')
            self.session.commit()
            perms = self.handler.get_permissions(self.session, myrole)
            self.assertEqual(perms, {'foo'})

            # user perms
            myuser = model.User(username='myuser')
            self.session.add(myuser)
            self.session.commit()
            perms = self.handler.get_permissions(self.session, myuser)
            self.assertEqual(len(perms), 0)
            myuser.roles.append(myrole)
            self.session.commit()
            perms = self.handler.get_permissions(self.session, myuser)
            self.assertEqual(perms, {'foo'})

            # invalid principal
            perms = self.handler.get_permissions(self.session, RuntimeError)
            self.assertEqual(perms, set())

            # missing principal
            perms = self.handler.get_permissions(self.session, None)
            self.assertEqual(perms, set())

        def test_has_permission(self):
            model = self.app.model

            # false default for role
            role = model.Role()
            self.assertFalse(self.handler.has_permission(self.session, role, 'foo'))

            # empty default for user
            user = model.User()
            self.assertFalse(self.handler.has_permission(self.session, user, 'foo'))

            # role perms
            myrole = model.Role(name='My Role')
            self.session.add(myrole)
            self.session.commit()
            self.assertFalse(self.handler.has_permission(self.session, myrole, 'foo'))
            self.handler.grant_permission(myrole, 'foo')
            self.session.commit()
            self.assertTrue(self.handler.has_permission(self.session, myrole, 'foo'))

            # user perms
            myuser = model.User(username='myuser')
            self.session.add(myuser)
            self.session.commit()
            self.assertFalse(self.handler.has_permission(self.session, myuser, 'foo'))
            myuser.roles.append(myrole)
            self.session.commit()
            self.assertTrue(self.handler.has_permission(self.session, myuser, 'foo'))

            # invalid principal
            self.assertFalse(self.handler.has_permission(self.session, RuntimeError, 'foo'))

            # missing principal
            self.assertFalse(self.handler.has_permission(self.session, None, 'foo'))

        def test_grant_permission(self):
            model = self.app.model
            myrole = model.Role(name='My Role')
            self.session.add(myrole)
            self.session.commit()

            # no perms yet
            self.assertEqual(self.session.query(model.Permission).count(), 0)

            # grant one perm, and confirm
            self.handler.grant_permission(myrole, 'foo')
            self.session.commit()
            self.assertEqual(self.session.query(model.Permission).count(), 1)
            perm = self.session.query(model.Permission).one()
            self.assertIs(perm.role, myrole)
            self.assertEqual(perm.permission, 'foo')

            # grant same perm again, confirm just one exists
            self.handler.grant_permission(myrole, 'foo')
            self.session.commit()
            self.assertEqual(self.session.query(model.Permission).count(), 1)
            perm = self.session.query(model.Permission).one()
            self.assertIs(perm.role, myrole)
            self.assertEqual(perm.permission, 'foo')

        def test_revoke_permission(self):
            model = self.app.model
            myrole = model.Role(name='My Role')
            self.session.add(myrole)
            self.handler.grant_permission(myrole, 'foo')
            self.session.commit()

            # just the one perm
            self.assertEqual(self.session.query(model.Permission).count(), 1)

            # revoke it, then confirm
            self.handler.revoke_permission(myrole, 'foo')
            self.session.commit()
            self.assertEqual(self.session.query(model.Permission).count(), 0)

            # revoke again, confirm
            self.handler.revoke_permission(myrole, 'foo')
            self.session.commit()
            self.assertEqual(self.session.query(model.Permission).count(), 0)