from __future__ import unicode_literals
from flask import url_for
from notifications_python_client.base import BaseAPIClient
from app.utils import BrowsableItem
from app.notify_client import _attach_current_user


class ServiceAPIClient(BaseAPIClient):
    # Fudge assert in the super __init__ so
    # we can set those variables later.
    def __init__(self):
        super().__init__("a", "b", "c")

    def init_app(self, application):
        self.base_url = application.config['API_HOST_NAME']
        self.service_id = application.config['ADMIN_CLIENT_USER_NAME']
        self.api_key = application.config['ADMIN_CLIENT_SECRET']

    def create_service(self, service_name, active, message_limit, restricted, user_id, email_from):
        """
        Create a service and return the json.
        """
        data = {
            "name": service_name,
            "active": active,
            "message_limit": message_limit,
            "user_id": user_id,
            "restricted": restricted,
            "email_from": email_from
        }
        data = _attach_current_user(data)
        return self.post("/service", data)['data']['id']

    def get_service(self, service_id):
        return self._get_service(service_id, detailed=False, today_only=False)

    def get_detailed_service(self, service_id):
        return self._get_service(service_id, detailed=True, today_only=False)

    def get_detailed_service_for_today(self, service_id):
        return self._get_service(service_id, detailed=True, today_only=True)

    def _get_service(self, service_id, detailed, today_only):
        """
        Retrieve a service.

        :param detailed - return additional details, including notification statistics
        :param today_only - return statistics only for today. No effect if detailed not passed in
        """
        params = {}
        if detailed:
            params['detailed'] = detailed
        if today_only:
            params['today_only'] = today_only

        return self.get(
            '/service/{0}'.format(service_id),
            params=params)

    def get_services(self, *params):
        """
        Retrieve a list of services.
        """
        return self.get('/service', *params)

    def update_service(
        self,
        service_id,
        **kwargs
    ):
        """
        Update a service.
        """
        data = _attach_current_user(kwargs)
        disallowed_attributes = set(data.keys()) - {
            'name',
            'message_limit',
            'active',
            'restricted',
            'email_from',
            'reply_to_email_address',
            'research_mode',
            'can_send_letters',
            'sms_sender',
            'created_by',
            'branding',
            'organisation'
        }
        if disallowed_attributes:
            raise TypeError('Not allowed to update service attributes: {}'.format(
                ", ".join(disallowed_attributes)
            ))

        endpoint = "/service/{0}".format(service_id)
        return self.post(endpoint, data)

    def update_service_with_properties(self, service_id, properties):
        return self.update_service(service_id, **properties)

    def deactivate_service(self, service_id):
        return self.post('/service/{}/deactivate'.format(service_id), data=None)

    def remove_user_from_service(self, service_id, user_id):
        """
        Remove a user from a service
        """
        endpoint = '/service/{service_id}/users/{user_id}'.format(
            service_id=service_id,
            user_id=user_id)
        data = _attach_current_user({})
        return self.delete(endpoint, data)

    def create_service_template(self, name, type_, content, service_id, subject=None):
        """
        Create a service template.
        """
        data = {
            "name": name,
            "template_type": type_,
            "content": content,
            "service": service_id
        }
        if subject:
            data.update({
                'subject': subject
            })
        data = _attach_current_user(data)
        endpoint = "/service/{0}/template".format(service_id)
        return self.post(endpoint, data)

    def update_service_template(self, id_, name, type_, content, service_id, subject=None):
        """
        Update a service template.
        """
        data = {
            'id': id_,
            'name': name,
            'template_type': type_,
            'content': content,
            'service': service_id
        }
        if subject:
            data.update({
                'subject': subject
            })
        data = _attach_current_user(data)
        endpoint = "/service/{0}/template/{1}".format(service_id, id_)
        return self.post(endpoint, data)

    def get_service_template(self, service_id, template_id, version=None, *params):
        """
        Retrieve a service template.
        """
        endpoint = '/service/{service_id}/template/{template_id}'.format(
            service_id=service_id,
            template_id=template_id)
        if version:
            endpoint = '{base}/version/{version}'.format(base=endpoint, version=version)
        return self.get(endpoint, *params)

    def get_service_template_versions(self, service_id, template_id, *params):
        """
        Retrieve a list of versions for a template
        """
        endpoint = '/service/{service_id}/template/{template_id}/versions'.format(
            service_id=service_id,
            template_id=template_id
        )
        return self.get(endpoint, *params)

    def get_service_templates(self, service_id, *params):
        """
        Retrieve all templates for service.
        """
        endpoint = '/service/{service_id}/template'.format(
            service_id=service_id)
        return self.get(endpoint, *params)

    def delete_service_template(self, service_id, template_id):
        """
        Set a service template's archived flag to True
        """
        endpoint = "/service/{0}/template/{1}".format(service_id, template_id)
        data = {
            'archived': True
        }
        data = _attach_current_user(data)
        return self.post(endpoint, data=data)

    def find_all_service_email_from(self, user_id=None):
        resp = self.get_services(user_id)
        return [x['email_from'] for x in resp['data']]

    # Temp access of service history data. Includes service and api key history
    def get_service_history(self, service_id):
        return self.get('/service/{0}/history'.format(service_id))

    def get_service_usage(self, service_id):
        return self.get('/service/{0}/fragment/aggregate_statistics'.format(service_id))

    def get_weekly_notification_stats(self, service_id):
        return self.get(url='/service/{}/notifications/weekly'.format(service_id))

    def get_whitelist(self, service_id):
        return self.get(url='/service/{}/whitelist'.format(service_id))

    def update_whitelist(self, service_id, data):
        return self.put(url='/service/{}/whitelist'.format(service_id), data=data)

    def get_billable_units(self, service_id, year):
        return self.get(url='/service/{}/billable-units?year={}'.format(service_id, year))


class ServicesBrowsableItem(BrowsableItem):
    @property
    def title(self):
        return self._item['name']

    @property
    def link(self):
        return url_for('main.service_dashboard', service_id=self._item['id'])

    @property
    def destructive(self):
        return False

    @property
    def hint(self):
        return None