#!/usr/bin/python
# -*- coding: utf-8 -*-

import json
import os
import sys


def main():
    """
    """
    if (len(sys.argv) != 2):
        sys.exit("Invalid parameter. Usage: " + sys.argv[0] + " <mapping>\n")
    cstm_error = ''
    try:
        cstm_error = 'Could not open config'
        with open(os.path.expanduser('~/.cmount.json')) as fp:
            config_dict = json.load(fp)
        cstm_error = 'Invalid / nonexistent mapping: {0}'.format(sys.argv[1])
        data = config_dict[sys.argv[1]]
        cstm_error = 'system() error'
        os.system('/sbin/cryptsetup luksOpen {device} {name}'.format(
            device=data['device'],
            name=sys.argv[1]))
        os.system('/bin/mount /dev/mapper/{name} {target}'.format(
            name=sys.argv[1],
            target=data['target']))
    except Exception as e:
        sys.stderr.write('Error: {0}\n'.format(cstm_error))
        sys.stderr.flush()

if __name__ == '__main__':
    main()