# SPDX-License-Identifier: AGPL-3.0-or-later
# pylint: disable=missing-module-docstring

import re
from urllib.parse import urlunparse, urlparse

from flask_babel import gettext

from searx import settings
from searx.plugins import logger

name = gettext('Hostname replace')
description = gettext('Rewrite result hostnames or remove results based on the hostname')
default_on = False
preference_section = 'general'

plugin_id = 'hostname_replace'

replacements = {re.compile(p): r for (p, r) in settings[plugin_id].items()} if plugin_id in settings else {}

logger = logger.getChild(plugin_id)
parsed = 'parsed_url'
_url_fields = ['iframe_src', 'audio_src']


def on_result(_request, _search, result):

    for pattern, replacement in replacements.items():

        if parsed in result:
            if pattern.search(result[parsed].netloc):
                # to keep or remove this result from the result list depends
                # (only) on the 'parsed_url'
                if not replacement:
                    return False
                result[parsed] = result[parsed]._replace(netloc=pattern.sub(replacement, result[parsed].netloc))
                result['url'] = urlunparse(result[parsed])

        for url_field in _url_fields:
            if result.get(url_field):
                url_src = urlparse(result[url_field])
                if pattern.search(url_src.netloc):
                    if not replacement:
                        del result[url_field]
                    else:
                        url_src = url_src._replace(netloc=pattern.sub(replacement, url_src.netloc))
                        result[url_field] = urlunparse(url_src)

    return True