import itertools

from notifications_utils.recipients import allowed_to_send_to

from app.dao.services_dao import dao_fetch_service_by_id
from app.models import (
    EMAIL_TYPE,
    KEY_TYPE_NORMAL,
    KEY_TYPE_TEAM,
    KEY_TYPE_TEST,
    MOBILE_TYPE,
    ServiceGuestList,
)


def get_recipients_from_request(request_json, key, type):
    return [(type, recipient) for recipient in request_json.get(key)]


def get_guest_list_objects(service_id, request_json):
    return [
        ServiceGuestList.from_string(service_id, type, recipient)
        for type, recipient in (
            get_recipients_from_request(request_json,
                                        'phone_numbers',
                                        MOBILE_TYPE) +
            get_recipients_from_request(request_json,
                                        'email_addresses',
                                        EMAIL_TYPE)
        )
    ]


def service_allowed_to_send_to(recipient, service, key_type, allow_guest_list_recipients=True):
    if key_type == KEY_TYPE_TEST:
        return True

    if key_type == KEY_TYPE_NORMAL and not service.restricted:
        return True

    # Revert back to the ORM model here so we can get some things which
    # aren’t in the serialised model
    service = dao_fetch_service_by_id(service.id)

    team_members = itertools.chain.from_iterable(
        [user.mobile_number, user.email_address] for user in service.users
    )
    guest_list_members = [
        member.recipient for member in service.guest_list
        if allow_guest_list_recipients
    ]

    if (
        (key_type == KEY_TYPE_NORMAL and service.restricted) or
        (key_type == KEY_TYPE_TEAM)
    ):
        return allowed_to_send_to(
            recipient,
            itertools.chain(
                team_members,
                guest_list_members
            )
        )