"""Clients.

Clients are external applications that are allowed to use this service. Each
client provides basic information such as an id, a redirect url and a secret.
For now, we don't use any external databases since we only have 3 (and the only
consummer of this service will likely just be mobile analytics for a while).
"""

from collections import namedtuple

from auth.utils import response


Client = namedtuple('Client', ['id', 'name', 'redirect_url', 'secret'])

clients = {
    # 1xxxx: for qa environments.
    19874: Client(
        19874, 'Mobile Analytics',
        'http://qa-ows-mobile-analytics.elasticbeanstalk.com/_oauth/owsAuth',
        'Sb6sdUcvMKSh2aHiXRd6ZfbK7'),

    # 2xxxx: for dev environments.
    29874: Client(
        29874, 'Mobile Analytics', 'http://localhost:3000/_oauth/owsAuth',
        'Sb6sdUcvMKSh2aHiXRd6ZfbK7'),

    # 3xxxx: for production environments.
    39874: Client(
        39874, 'Mobile Analytics',
        'http://m.workstation.theorchard.com/_oauth/owsAuth',
        'Sb6sdUcvMKSh2aHiXRd6ZfbK7')
}


def fetch_one(client_id=None):
    """Fetch a client by its id.

    Args:
        client_id (int): the client id.
    Returns:
        Response: the response data.
    """
    client = clients.get(client_id.value)
    if not client:
        return response.create_not_found_response(errors={
            'client': 'The client does not exist.'
        })
    return response.Response(message=client)