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

import sys
import socket
import yaml
import os.path
from dns import resolver,reversename

own_directory = os.path.dirname(os.path.abspath(__file__))
lib = os.path.join(own_directory, '..')
if os.path.exists(os.path.join(lib, 'hostinfo')):
    sys.path = [lib] + sys.path

from hostinfo import printer

def print_info(path, key=None):
    stream = file(path, 'r')
    data = yaml.load(stream)

    p = printer.Printer(data)
    p.info(key)

def find_host(host, key=None):
    path = "/usr/local/share/hostinfo/%s" % host

    if not os.path.exists(path):
        # try to build the fqdn
        path = "/usr/local/share/hostinfo/%s.spline.inf.fu-berlin.de" % \
            host.replace('.spline.de', '')

        if not os.path.exists(path):
            try:
                # try to use reverse dns
                addr=reversename.from_address(host)
                hostname = str(resolver.query(addr,"PTR")[0])
                path = "/usr/local/share/hostinfo/%s" % hostname[0:-1]
            except:
                pass

            if not os.path.exists(path):
                return False

    print_info(path, key)
    return True

def main():
    if len(sys.argv) < 2:
        print('Usage: %s <host> [info]' % sys.argv[0])
        sys.exit(1)

    if len(sys.argv) == 2:
        if find_host(sys.argv[1]):
            sys.exit(0)
    else:
        if find_host(sys.argv[1], sys.argv[2]):
            sys.exit(0)

    print("Host '%s' could not be found!" % sys.argv[1])
    sys.exit(1)


if __name__ == '__main__':
    main()