#!/usr/bin/python3
import logging
import os

from keyman_config.gsettings import GSettings


# pylint: disable=global-statement


class GnomeKeyboardsUtil():
    def __init__(self):
        self.input_sources = GSettings('org.gnome.desktop.input-sources')

    def read_input_sources(self):
        sources = self.input_sources.get('sources')
        logging.debug('read sources: %s', sources)
        if sources is None:
            return []
        return sources

    def write_input_sources(self, sources):
        logging.debug('Setting sources to: %s', sources)
        self.input_sources.set('sources', sources, 'a(ss)')


# pylint: disable=invalid-name
__is_gnome_desktop = None


def is_gnome_desktop():
    '''
    Returns true if system is running Gnome shell or another Gnome desktop
    that stores keyboard data under `org.gnome.desktop.input-sources`.
    '''
    global __is_gnome_desktop

    if __is_gnome_desktop is None:
        code = os.system('pidof gnome-shell >/dev/null 2>&1')
        gnome_env = ('XDG_CURRENT_DESKTOP' in os.environ) and ('gnome' in os.environ['XDG_CURRENT_DESKTOP'].lower())
        __is_gnome_desktop = (code == 0) or gnome_env
    return __is_gnome_desktop


def _reset_gnome_shell():
    # used in unit tests
    global __is_gnome_desktop

    __is_gnome_desktop = None


def get_ibus_keyboard_id(keyboard, packageDir, language=None, ignore_language=False):
    if not keyboard:
        return None
    kmx_file = os.path.join(packageDir, keyboard['id'] + ".kmx")
    if ignore_language:
        return kmx_file
    if language is not None and language != '':
        logging.debug(language)
        return f"{language}:{kmx_file}"
    if "languages" in keyboard and len(keyboard["languages"]) > 0:
        firstLanguage = keyboard["languages"][0]
        logging.debug(firstLanguage)
        if 'id' in firstLanguage:
            return f"{firstLanguage['id']}:{kmx_file}"
    return kmx_file
