import sys

import subprocess

logging.basicConfig(level=logging.DEBUG,

                    format="%(asctime)s %(levelname)-5.5s %(message)s")

class BackupManager(object):

    def __init__(self, repos_location, rsa_key, backup_server):

        today = datetime.datetime.now().weekday() + 1

        self.backup_file_name = "mercurial_repos.%s.tar.gz" % today

        self.id_rsa_path = self.get_id_rsa(rsa_key)

        self.repos_path = self.get_repos_path(repos_location)

        self.backup_server = backup_server

        self.backup_file_path = '/tmp'

        logging.info('starting backup for %s', self.repos_path)

        logging.info('backup target %s', self.backup_file_path)

    def get_id_rsa(self, rsa_key):

        if not os.path.isfile(rsa_key):

            logging.error('Could not load id_rsa key file in %s', rsa_key)

            sys.exit()

    def get_repos_path(self, path):

        if not os.path.isdir(path):

            logging.error('Wrong location for repositories in %s', path)

            sys.exit()

        return path

    def backup_repos(self):

        bckp_file = os.path.join(self.backup_file_path, self.backup_file_name)

        tar = tarfile.open(bckp_file, "w:gz")

        for dir_name in os.listdir(self.repos_path):

            logging.info('backing up %s', dir_name)

            tar.add(os.path.join(self.repos_path, dir_name), dir_name)

        tar.close()

        logging.info('finished backup of mercurial repositories')

    def transfer_files(self):

        params = {

                  'id_rsa_key': self.id_rsa_path,

                  'backup_file':os.path.join(self.backup_file_path,

                                             self.backup_file_name),