from contextlib import contextmanager

from six.moves.urllib.parse import urlencode

from .api_asserts import (
    assert_error_code_is,
    assert_has_keys,
    assert_not_has_keys,
    assert_status_code_is,
)
from .api_util import (
    ADMIN_TEST_USER,
    get_master_api_key,
    get_user_api_key,
    OTHER_USER,
    TEST_USER,
)
from .interactor import TestCaseGalaxyInteractor as BaseInteractor
from .testcase import FunctionalTestCase


class UsesApiTestCaseMixin(object):

    def _api_url(self, path, params=None, use_key=None, use_admin_key=None):
        if not params:
            params = {}
        url = "%s/api/%s" % (self.url, path)
        if use_key:
            params["key"] = self.galaxy_interactor.api_key
        if use_admin_key:
            params["key"] = self.galaxy_interactor.master_api_key
        query = urlencode(params)
        if query:
            url = "%s?%s" % (url, query)
        return url

    def _setup_interactor(self):
        self.user_api_key = get_user_api_key()
        self.master_api_key = get_master_api_key()
        self.galaxy_interactor = ApiTestInteractor(self)

    def _setup_user(self, email, password=None):
        self.galaxy_interactor.ensure_user_with_email(email, password=password)
        users = self._get("users", admin=True).json()
        user = [user for user in users if user["email"] == email][0]
        return user

    def _setup_user_get_key(self, email):
        self.galaxy_interactor.ensure_user_with_email(email)
        users = self._get("users", admin=True).json()
        user = [user for user in users if user["email"] == email][0]
        return self._post("users/%s/api_key" % user["id"], admin=True).json()

    @contextmanager
    def _different_user(self, email=OTHER_USER):
        """ Use in test cases to switch get/post operations to act as new user,

            with self._different_user( "other_user@bx.psu.edu" ):
                self._get( "histories" )  # Gets other_user@bx.psu.edu histories.
        """
        original_api_key = self.user_api_key
        original_interactor_key = self.galaxy_interactor.api_key
        new_key = self._setup_user_get_key(email)
        try:
            self.user_api_key = new_key
            self.galaxy_interactor.api_key = new_key
            yield
        finally:
            self.user_api_key = original_api_key
            self.galaxy_interactor.api_key = original_interactor_key

    def _get(self, *args, **kwds):
        return self.galaxy_interactor.get(*args, **kwds)

    def _post(self, *args, **kwds):
        return self.galaxy_interactor.post(*args, **kwds)

    def _delete(self, *args, **kwds):
        return self.galaxy_interactor.delete(*args, **kwds)

    def _put(self, *args, **kwds):
        return self.galaxy_interactor.put(*args, **kwds)

    def _patch(self, *args, **kwds):
        return self.galaxy_interactor.patch(*args, **kwds)

    def _assert_status_code_is(self, response, expected_status_code):
        assert_status_code_is(response, expected_status_code)

    def _assert_has_keys(self, response, *keys):
        assert_has_keys(response, *keys)

    def _assert_not_has_keys(self, response, *keys):
        assert_not_has_keys(response, *keys)

    def _assert_error_code_is(self, response, error_code):
        assert_error_code_is(response, error_code)

    def _random_key(self):  # Used for invalid request testing...
        return "1234567890123456"

    _assert_has_key = _assert_has_keys


class ApiTestCase(FunctionalTestCase, UsesApiTestCaseMixin):

    def setUp(self):
        super(ApiTestCase, self).setUp()
        self._setup_interactor()


class ApiTestInteractor(BaseInteractor):
    """ Specialized variant of the API interactor (originally developed for
    tool functional tests) for testing the API generally.
    """

    def __init__(self, test_case):
        admin = getattr(test_case, "require_admin_user", False)
        test_user = TEST_USER if not admin else ADMIN_TEST_USER
        super(ApiTestInteractor, self).__init__(test_case, test_user=test_user)

    # This variant the lower level get and post methods are meant to be used
    # directly to test API - instead of relying on higher-level constructs for
    # specific pieces of the API (the way it is done with the variant for tool)
    # testing.
    def get(self, *args, **kwds):
        return self._get(*args, **kwds)

    def post(self, *args, **kwds):
        return self._post(*args, **kwds)

    def delete(self, *args, **kwds):
        return self._delete(*args, **kwds)

    def patch(self, *args, **kwds):
        return self._patch(*args, **kwds)

    def put(self, *args, **kwds):
        return self._put(*args, **kwds)