from app.models.organization import Organization


def get_email_choices(service):
    organization_branding_id = (
        service.organization.email_branding_id if service.organization else None
    )

    if (
        service.organization_type == Organization.TYPE_FEDERAL
        and service.email_branding_id is not None  # GOV.UK is not current branding
        and organization_branding_id is None  # no default to supersede it (GOV.UK)
    ):
        yield ("govuk", "GOV.UK")

    if (
        service.organization_type == Organization.TYPE_FEDERAL
        and service.organization
        and organization_branding_id is None  # don't offer both if org has default
        and service.email_branding_name.lower()
        != f"GOV.UK and {service.organization.name}".lower()
    ):
        yield ("govuk_and_org", f"GOV.UK and {service.organization.name}")