from typing import Any, Dict, Iterable

from types import MathebauMLType

# source of which keys exist: https://docs.mailman3.org/projects/mailman/en/latest/src/mailman/rest/docs/listconf.html
_DEFAULTS: Dict[str, Any] = {
    'acceptable_aliases': ['one@example.com', 'two@example.com'],
    'accept_these_nonmembers': ['aperson@example.com'],
    'admin_immed_notify': False,
    'admin_notify_mchanges': True,
    'administrivia': False,
    'advertised': False,
    'anonymous_list': True,
    'archive_policy': 'never',
    'archive_rendering_mode': 'text',
    'autorespond_owner': 'respond_and_discard',
    'autorespond_postings': 'respond_and_continue',
    'autorespond_requests': 'respond_and_discard',
    'autoresponse_grace_period': '45d',
    'autoresponse_owner_text': 'the owner',
    'autoresponse_postings_text': 'the mailing list',
    'autoresponse_request_text': 'the robot',
    'bounce_info_stale_after': '5d',
    'bounce_notify_owner_on_bounce_increment': False,
    'bounce_notify_owner_on_disable': True,
    'bounce_notify_owner_on_removal': True,
    'bounce_score_threshold': 5,
    'bounce_you_are_disabled_warnings': 3,
    'bounce_you_are_disabled_warnings_interval': '1d',
    'forward_unrecognized_bounces_to': 'administrators',
    'filter_extensions': ['.mkv'],
    'filter_types': ['application/zip'],
    'process_bounces': True,
    'discard_these_nonmembers': ['^name_*bperson*@example.com'],
    'display_name': 'Fnords',
    'description': 'This is my mailing list',
    'include_rfc2369_headers': False,
    'info': 'This is the mailing list information',
    'allow_list_posts': False,
    'digest_send_periodic': False,
    'digest_size_threshold': 10.5,
    'digest_volume_frequency': 'yearly',
    'digests_enabled': False,
    'dmarc_mitigate_action': 'munge_from',
    'dmarc_mitigate_unconditionally': False,
    'dmarc_moderation_notice': 'Some moderation notice',
    'dmarc_wrapped_message_text': 'some message text',
    'personalize': 'none',
    'preferred_language': 'ja',
    'posting_pipeline': 'virgin',
    'filter_content': True,
    'first_strip_reply_to': True,
    'gateway_to_mail': True,
    'gateway_to_news': True,
    'linked_newsgroup': 'my.group',
    'newsgroup_moderation': 'moderated',
    'nntp_prefix_subject_too': False,
    'convert_html_to_plaintext': True,
    'collapse_alternatives': False,
    'reject_these_nonmembers': ['^b[hello]*@example.com'],
    'hold_these_nonmembers': ['^re[gG]ex@example.com'],
    'reply_goes_to_list': 'point_to_list',
    'reply_to_address': 'bee@example.com',
    'require_explicit_destination': False,
    'member_roster_visibility': 'members',
    'send_goodbye_message': False,
    'send_welcome_message': False,
    'subject_prefix': '[ant]',
    'subscription_policy': 'moderate',
    'unsubscription_policy': 'confirm',
    'default_member_action': 'hold',
    'default_nonmember_action': 'discard',
    'moderator_password': 'password',
    'max_message_size': '500',
    'respond_to_post_requests': True,
    'max_days_to_hold': '20',
    'max_num_recipients': '20',
    'pass_extensions': ['.pdf'],
    'pass_types': ['image/jpeg'],
    'filter_action': 'preserve',
    'emergency': False
}


def get_single_default(key: str, listtype: MathebauMLType) -> Any:
    """Get the default value for a single key of a specific list type"""
    val = _DEFAULTS.get(key)
    if isinstance(val, dict):
        return val.get(listtype)
    return val


def get_config_keys() -> Iterable[str]:
    """Get names of all config attributes a mailinglist has."""
    return _DEFAULTS.keys()


def get_default_config(listtype: MathebauMLType) -> Dict[str, Any]:
    ret = dict()
    for key in get_config_keys():
        ret[key] = get_single_default(key, listtype)
    return ret