import unittest

from sqlalchemy.engine.url import make_url

from superset.models.core import Database


class DatabaseModelTestCase(unittest.TestCase):

    def test_database_schema_presto(self):
        sqlalchemy_uri = 'presto://presto.airbnb.io:8080/hive/default'
        model = Database(sqlalchemy_uri=sqlalchemy_uri)

        db = make_url(model.get_sqla_engine().url).database
        self.assertEquals('hive/default', db)

        db = make_url(model.get_sqla_engine(schema='core_db').url).database
        self.assertEquals('hive/core_db', db)

        sqlalchemy_uri = 'presto://presto.airbnb.io:8080/hive'
        model = Database(sqlalchemy_uri=sqlalchemy_uri)

        db = make_url(model.get_sqla_engine().url).database
        self.assertEquals('hive', db)

        db = make_url(model.get_sqla_engine(schema='core_db').url).database
        self.assertEquals('hive/core_db', db)

    def test_database_schema_postgres(self):
        sqlalchemy_uri = 'postgresql+psycopg2://postgres.airbnb.io:5439/prod'
        model = Database(sqlalchemy_uri=sqlalchemy_uri)

        db = make_url(model.get_sqla_engine().url).database
        self.assertEquals('prod', db)

        db = make_url(model.get_sqla_engine(schema='foo').url).database
        self.assertEquals('prod', db)

    def test_database_schema_hive(self):
        sqlalchemy_uri = 'hive://hive@hive.airbnb.io:10000/default?auth=NOSASL'
        model = Database(sqlalchemy_uri=sqlalchemy_uri)
        db = make_url(model.get_sqla_engine().url).database
        self.assertEquals('default', db)

        db = make_url(model.get_sqla_engine(schema='core_db').url).database
        self.assertEquals('core_db', db)

    def test_database_schema_mysql(self):
        sqlalchemy_uri = 'mysql://root@localhost/superset'
        model = Database(sqlalchemy_uri=sqlalchemy_uri)

        db = make_url(model.get_sqla_engine().url).database
        self.assertEquals('superset', db)

        db = make_url(model.get_sqla_engine(schema='staging').url).database
        self.assertEquals('staging', db)

    def test_database_impersonate_user(self):
        uri = 'mysql://root@localhost'
        example_user = 'giuseppe'
        model = Database(sqlalchemy_uri=uri)

        model.impersonate_user = True
        user_name = make_url(model.get_sqla_engine(user_name=example_user).url).username
        self.assertEquals(example_user, user_name)

        model.impersonate_user = False
        user_name = make_url(model.get_sqla_engine(user_name=example_user).url).username
        self.assertNotEquals(example_user, user_name)