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

# kpov_random_helpers should be imported by add_assignment.py

instructions = {
    'si':u"""
Postavi dva navidezna računalnika - SimpleArbiter z diska SimpleArbiterVPN ter
VPNClient, ki jima nastavite pravilne mrežne nastavitve (medsebojna povezava in povezava na splet).
Na oba računalnika namestite OpenVPN in program za nadzor nad virtualnimi napravami (s katerim kreirate napravo tap).
Strežnik SimpleArbiterVPN naj generira skupno skrivnost (*.key), ki jo na VPNCLient uporabite skupaj z konfiguracijsko
datoteko za OpenVPN povezavo. Nato poskrbite, da bo VPNClient na navideznem omrežju prek NFS omogočil
dostop do imenika /home/test/IME_IMENIKA, pri čemer IME_IMENIKA preberite na SimpleArbiter.
V ta imenik skopirajte datoteke, ki so prek SMB dostopne na SimpleArbiter.
"""
}

computers = {
    'maliNetworkManager': {
        'disks': [
            {   'name': 'maliNetworkManager',
            },
            #{   'name': 'CDROM',
            #    'options':{'readonly': True},
            #    'parts': [],# no parts, no mounting.
            #}
        ],
        'network_interfaces': [{'network': 'net1'}],
        'flavor': 'm1.tiny',
        'config_drive': False

    },
    'maliBrezNetworkManager': {
        'disks': [
            {   'name': 'maliBrezNetworkManager',
            },
            #{   'name': 'CDROM',
            #    'options':{'readonly': True},
            #    'parts': [],# no parts, no mounting.
            #}
        ],
        'network_interfaces': [{'network': 'net1'}],
        'flavor': 'm1.tiny',
        'config_drive': False

    },
    'SimpleArbiter': {
        'disks': [
            {   'name': 'simpleArbiterDhcp',
                # attempt automount
            },
            #{   'name': 'CDROM',
            #    'options': {'readonly': True},
            #    'parts': [{'dev': 'b1', 'path': '/cdrom'}],
            #},
        ],
        'network_interfaces': [{'network': 'net1'}, {'network': 'test-net'}],
        'flavor': 'm1.tiny',
        'config_drive': False
    }
}

networks = {
    'net1': {
        'public': False
    },
    'test-net': {
        'public': True
    }
}

params_meta = {
    'IP_NM': {
        'descriptions': {
            'si': 'Naslov maliNetworkManager'
        },
        'w': False,
        'public': True,
        'type': 'IP',
        'generated': True
    },
    'DNS_NM': {
        'descriptions': {
            'si': 'DNS za maliNetworkManager'
        },
        'w': False,
        'public': True,
        'type': 'IP',
        'generated': True
    },
    'IP_static': {
        'descriptions': {
            'si': 'Naslov maliBrezNetworkManager'
        },
        'w': False,
        'public': True,
        'type': 'IP',
        'generated': True
    },
    'DNS_static': {
        'descriptions': {
            'si': 'DNS za maliBrezNetworkManager'
        },
        'w': False,
        'public': True,
        'type': 'IP',
        'generated': True
    },
}


def task(IP_NM, DNS_NM, IP_static, DNS_static):
    
    import pxssh    # Used to set up an SSH connection to a remote machine
    import pexpect  # Allows the script to spawn a child application and control it as if a human were typing commands
    
    
    # the necessary things we need to check if the task was performed correctly
    results = dict()
    
    # The login params (these must be used on the machines!)
    peer_user = 'student'
    peer_passwd = 'vaje'
    
    # Sets up the SSH connections to the machines
    sA = pxssh.pxssh()
    sB = pxssh.pxssh()
    
    # Logs in to the machines with the default login params
    sA.login(IP_NM, peer_user, peer_passwd)
    sB.login(IP_static, peer_user, peer_passwd)
    
    # sA
    # make sure NM is not handling eth0
    results['NM_nmcli'] = sA.run('nmcli d')
    results['NM_nslookup'] = sA.run('nslookup www.arnes.si')
    
    # sB
    # check whether NM is handling eth0
    results['static_nmcli'] = sB.run('nmcli d')
    results['static_nslookup'] = sB.run('nslookup www.arnes.si')
    
    # Check if the tap exists
    # Must return a non-empty string
    results['is_tap_exists'] = sA.run('ls /sys/class/net | grep "tap0"');
    # Check if the VPN server is running
    # Must return a non-empty string
    results['is_VPN_running'] = sA.run('ls /sys/class/net | grep "tun0"');
    
    # Check if both clients are connected
    #
    #
    
    
    sA.logout()
    sB.logout()
    
    
    return results


def gen_params(user_id, params_meta):
    
    alpha = "abcdefghijklmnoprstuvzxyqw"
    alphaupp = "ABCDEFGHIJKLMNOPRSTUVZQWXY"
    alpha2 = ['$','?','!',"%","&"]
    alpha3 = ['IT','DH','JF','PO','LZ']
    
    
    temp = datetime.datetime.now().strftime("%Y%m%d%H%M%S")
    hash = ""
    
    for x in temp:
    	for i in x:
    		if int(i)<5:
    			hash+=random.choice(alpha)+alpha2[int(i)]
    		else:
    			hash+=random.choice(alphaupp)+alpha3[int(i)-5]
        hash+=":"+temp
    
    
    params = dict()
    
    r = random.Random(user_id)
    
    # IP_NM, DNS_NM, IP_static, DNS_static)
    dns_servers = ['193.2.1.66', '193.2.1.72', '8.8.8.8', '8.8.4.4', '208.67.222.222', '208.67.220.220']
    
    net = kpov_random_helpers.IPv4_subnet_gen(r, '172.23.128.0/18', 24)
    
    params['DNS_NM'] = r.choice(dns_servers)
    params['IP_NM'], params['IP_static'] = kpov_random_helpers.IPv4_addr_gen(r, net, 2)
    params['DNS_static'] = r.choice(dns_servers)
    
    params[user_id] = hash
    
    
    return params


def task_check(results, params):
    
    import re
    
    score = -9
    
    if results['NM_nslookup'].find('Server:\t\t{0}\r'.format(params['DNS_NM'])) > -1:
        score += 3
    if results['static_nslookup'].find('Server:\t\t{0}\r'.format(params['DNS_static'])) > -1:
        score += 3
    if re.search(r'eth0 +802-.*connected', results['NM_nmcli']):
        score += 2
    if not re.search(r'eth0 +802-.*connected', results['static_nmcli']):
        score += 2
    
    score = 0
    
    return score


def prepare_disks(templates, params):
    
    d = templates['simpleArbiterDhcp']
    
    guestmount -a d -m /dev/VG/LV -m /dev/sda1:/boot --ro /mnt 
    
    pass