''' Test package for ordr2. '''

import os.path
import pytest
import transaction

from pyramid import testing
from pyramid.csrf import get_csrf_token
from webob.multidict import MultiDict


# some path mangling to get the path to passlib.ini
currrent_dir = os.path.dirname(__file__)
ordr2_dir = os.path.dirname(currrent_dir)
passlib_config_path = os.path.join(ordr2_dir, 'passlib.ini')
assert os.path.isfile(passlib_config_path)

APP_SETTINGS = {
    'sqlalchemy.url': 'sqlite:///:memory:',
    'auth.secret': 'not-very-secure',
    'session.secret':
        '4d72ee16df8cf1238048ade32e3ce4d51757af8ada4a962cfae5cea5c08421a0',
    'session.auto_csrf': True,
    'passlib.config': passlib_config_path,
    'pyramid.includes': [
        'pyramid_jinja2',
        ],
    'mail.default_sender': 'ordr@example.com'
    }

EXAMPLE_USER_DATA = {
    'unvalidated': (1, 'Graham', 'Chapman'),
    'new': (2, 'John', 'Cleese'),
    'user': (3, 'Terry', 'Gilliam'),
    'purchaser': (4, 'Eric', 'Idle'),
    'admin': (5, 'Terry', 'Jones'),
    'inactive': (6, 'Michael', 'Palin'),
    }


# fixtures

@pytest.fixture(scope='session')
def app_config():
    ''' fixture for tests requiring a pyramid.testing setup '''
    with testing.testConfig(settings=APP_SETTINGS) as config:
        config.include('pyramid_mailer.testing')
        config.include('pyramid_jinja2')

        from ordr2.models.account import passlib_context
        passlib_context.update(schemes=['argon2'])

        yield config


@pytest.fixture(scope='function')
def dbsession(app_config):
    ''' fixture for testing with database connection '''
    from ordr2.models.meta import Base
    from ordr2.models import (
        get_engine,
        get_session_factory,
        get_tm_session
        )

    settings = app_config.get_settings()
    engine = get_engine(settings)
    session_factory = get_session_factory(engine)
    session = get_tm_session(session_factory, transaction.manager)
    Base.metadata.create_all(engine)

    yield session

    transaction.abort()
    Base.metadata.drop_all(engine)


# helpers

def get_user(role_name):
    ''' get the user model for one well known user '''
    from ordr2.models import Role, User
    id_, first_name, last_name = EXAMPLE_USER_DATA[role_name]
    user = User(
        id=id_,
        username=first_name + last_name,
        first_name = first_name,
        last_name = last_name,
        email = last_name.lower() + '@example.com',
        role=Role(role_name)
        )
    user.set_password(first_name)
    return user


def create_users(db):
    ''' set up all well known example users '''
    from ordr2.models import Role
    for role in Role:
        user = get_user(role.value)
        db.add(user)


def set_deform_data(request, form_data, modifier=None):
    ''' augments the request to include post data as provided by deform '''
    post_dict = MultiDict([
        ('__formid__', 'deform'),
        ('_charset_', 'UTF-8'),
        ('csrf_token',  get_csrf_token(request))
        ])
    for key, value in form_data.items():
        post_dict.add(key, value)
    if modifier:
        # the update() or __setitem__ function of multidict will append
        # items with the same key instead of replacing them
        items = list(post_dict.items())
        modified = [(key, modifier.pop(key, value)) for key, value in items]
        post_dict = MultiDict(modified)
        post_dict.update(modifier)
    request.POST = post_dict