import configparser
import os
import logging

from ucloud.common.host import HostPool
from ucloud.common.request import RequestPool
from ucloud.common.vm import VmPool
from ucloud.common.storage_handlers import (FileSystemBasedImageStorageHandler,
                                            CEPHBasedImageStorageHandler)
from ucloud.common.etcd_wrapper import Etcd3Wrapper
from ucloud.settings import Settings
from os.path import join as join_path

logger = logging.getLogger('ucloud.config')



config = Settings()
etcd_client = config.get_etcd_client()

host_pool = HostPool(etcd_client, config['etcd']['host_prefix'])
vm_pool = VmPool(etcd_client, config['etcd']['vm_prefix'])
request_pool = RequestPool(etcd_client, config['etcd']['request_prefix'])

running_vms = []

__storage_backend = config['storage']['storage_backend']
if __storage_backend == 'filesystem':
    image_storage_handler = FileSystemBasedImageStorageHandler(
        vm_base=config['storage']['vm_dir'],
        image_base=config['storage']['image_dir']
    )
elif __storage_backend == 'ceph':
    image_storage_handler = CEPHBasedImageStorageHandler(
        vm_base=config['storage']['ceph_vm_pool'],
        image_base=config['storage']['ceph_image_pool']
    )
else:
    raise Exception('Unknown Image Storage Handler')