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

import json
import os
import subprocess
import sys


def main():
    """Main entry point"""
    if (len(sys.argv) != 2):
        sys.exit('Invalid parameter. Usage: {0} <mapping>\n'.format(
            sys.argv[0]))
    cstm_error = ''
    try:
        cstm_error = 'Could not open config (~/.smount.json)'
        with open(os.path.expanduser('~/.smount.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'
        args = ['/usr/bin/sshfs']
        if data.get('options'):
            for opt in data.get('options'):
                args.extend(['-o', opt])
        args.extend([data['src'], data['dest']])
        subprocess.check_call(args)
    except subprocess.CalledProcessError as e:
        print('Execution error: {0}'.format(e), file=sys.stderr, flush=True)
    except Exception:
        print('Error: {0}'.format(cstm_error), file=sys.stderr, flush=True)


if __name__ == '__main__':
    main()