# -*- coding: utf-8 -*-
'''
Network tools to run from the Master, specific to the Claremont MakerSpace
'''

import logging
import socket
import netifaces
import time

import salt.utils.network

log = logging.getLogger(__name__)

def wol(mac, bcast="255.255.255.255", destport=9):
    "Like network.wol, but sends on each interface"
    dest = salt.utils.network.mac_str_to_bytes(mac)
    for iface in netifaces.interfaces():
        if iface == 'lo':
            continue
        with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as sock:
            sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
            sock.setsockopt(socket.SOL_SOCKET, socket.SO_BINDTODEVICE, iface.encode('ascii'))
            sock.sendto(b"\xff" * 6 + dest * 16, (bcast, int(destport)))
    return True

def wolmatch(tgt, destport=9):
    'Like network.wolmatch'
    ret = []
    minions = __salt__['cache.grains'](tgt, 'compound')
    for name, minion in minions.items():
        if 'hwaddr_interfaces' not in minion:
            continue
        # NOTE: FIVE, NINE, and TEN all should have eth addr as well, why is there only one printed?
        for iface, mac in minion['hwaddr_interfaces'].items():
            mac = mac.strip()
            if iface == 'lo' or len(mac) != len("00:00:00:00:00:00"):
                continue
            #print(name, iface, mac, minion['ip_interfaces'])
            wol(mac, destport=destport)
            log.info('Waking up %s', mac)
            ret.append(f"{name}: {mac}")
    return ret

def wolmatch_ensure(tgt, destport=9):
    'Ensure matched minions are online, and stay online'
    while True:
        log.info('Waking up minions')
        wolmatch(tgt, destport)
        time.sleep(5)