from flask_login import current_user
from flask import has_request_context, request, abort
from notifications_python_client.base import BaseAPIClient
from notifications_python_client import __version__
from notifications_utils.clients.redis.redis_client import RedisClient


def _attach_current_user(data):
    return dict(
        created_by=current_user.id,
        **data
    )


class NotifyAdminAPIClient(BaseAPIClient):

    redis_client = RedisClient()

    def __init__(self):
        super().__init__("a" * 73, "b")

    def init_app(self, app):
        self.base_url = app.config['API_HOST_NAME']
        self.service_id = app.config['ADMIN_CLIENT_USER_NAME']
        self.api_key = app.config['ADMIN_CLIENT_SECRET']
        self.route_secret = app.config['ROUTE_SECRET_KEY_1']
        self.redis_client.init_app(app)
        self.redis_client.redis_store.decode_responses = True

    def generate_headers(self, api_token):
        headers = {
            "Content-type": "application/json",
            "Authorization": "Bearer {}".format(api_token),
            "X-Custom-Forwarder": self.route_secret,
            "User-agent": "NOTIFY-API-PYTHON-CLIENT/{}".format(__version__)
        }
        return self._add_request_id_header(headers)

    @staticmethod
    def _add_request_id_header(headers):
        if not has_request_context():
            return headers
        headers['X-B3-TraceId'] = request.request_id
        headers['X-B3-SpanId'] = request.span_id
        return headers

    def check_inactive_service(self):
        # this file is imported in app/__init__.py before current_service is initialised, so need to import later
        # to prevent cyclical imports
        from app import current_service

        # if the current service is inactive and the user isn't a platform admin, we should block them from making any
        # stateful modifications to that service
        if current_service and not current_service.active and not current_user.platform_admin:
            abort(403)

    def post(self, *args, **kwargs):
        self.check_inactive_service()
        return super().post(*args, **kwargs)

    def put(self, *args, **kwargs):
        self.check_inactive_service()
        return super().put(*args, **kwargs)

    def delete(self, *args, **kwargs):
        self.check_inactive_service()
        return super().delete(*args, **kwargs)