import os

import boto3
import mock
import pytest
from alembic.command import upgrade
from alembic.config import Config
from flask.ext.migrate import Migrate, MigrateCommand
from flask.ext.script import Manager

from app import create_app, db


@pytest.fixture(scope='session')
def notify_api(request):
    app = create_app()
    ctx = app.app_context()
    ctx.push()

    def teardown():
        ctx.pop()

    request.addfinalizer(teardown)
    return app


@pytest.fixture(scope='session')
def notify_db(notify_api, request):
    Migrate(notify_api, db)
    Manager(db, MigrateCommand)
    BASE_DIR = os.path.dirname(os.path.dirname(__file__))
    ALEMBIC_CONFIG = os.path.join(BASE_DIR, 'migrations')
    config = Config(ALEMBIC_CONFIG + '/alembic.ini')
    config.set_main_option("script_location", ALEMBIC_CONFIG)

    with notify_api.app_context():
        upgrade(config, 'head')

    def teardown():
        db.session.remove()
        db.get_engine(notify_api).dispose()

    request.addfinalizer(teardown)
    return db


@pytest.fixture(scope='function')
def notify_db_session(request, notify_db):
    def teardown():
        notify_db.session.remove()
        for tbl in reversed(notify_db.metadata.sorted_tables):
            if tbl.name not in ["provider_details", "key_types", "branding_type"]:
                notify_db.engine.execute(tbl.delete())
        notify_db.session.commit()

    request.addfinalizer(teardown)


@pytest.fixture(scope='function')
def os_environ(request):
    env_patch = mock.patch('os.environ', {})
    request.addfinalizer(env_patch.stop)

    return env_patch.start()


@pytest.fixture(scope='function')
def sqs_client_conn(request):
    boto3.setup_default_session(region_name='eu-west-1')
    return boto3.resource('sqs')


def pytest_generate_tests(metafunc):
    # Copied from https://gist.github.com/pfctdayelise/5719730
    idparametrize = getattr(metafunc.function, 'idparametrize', None)
    if idparametrize:
        argnames, testdata = idparametrize.args
        ids, argvalues = zip(*sorted(testdata.items()))
        metafunc.parametrize(argnames, argvalues, ids=ids)