import importlib
from importlib import util
import os

from engine import log
from engine.plugins.plugin import LoadablePlugin

PLUGIN_DIR = '/etc/hometv/plugins'
LOADED_PLUGINS = {}
ENABLED_PLUGINS = {}


def find_plugins():
    for package in os.listdir(PLUGIN_DIR):
        modules = _import(package, '__init__')

        for module in modules.__all__:
            _class = _import(package, module)
            if _class.__name__.endswith('plugin'):
                LOADED_PLUGINS[package] = _class


def load_plugins(plugins):
    for plugin in plugins:
        if plugin in LOADED_PLUGINS:
            ENABLED_PLUGINS[plugin] = LoadablePlugin(LOADED_PLUGINS[plugin])


def _import(package, module):
    spec = util.spec_from_file_location(
        '{}.{}'.format(package, module),
        '{}/{}/{}.py'.format(PLUGIN_DIR, package, module))
    load = util.module_from_spec(spec)
    spec.loader.exec_module(load)
    log.debug('Imported: {}.{}'.format(package, module))
    return load