#!/usr/bin/python3
import sys, ast
from subprocess import check_output, run
from time import sleep
from datetime import datetime


def get_time():
    ts1 = str(datetime.now()).split('.')[0]
    return ts1


def call_shutdown(client_type, clientid):
    if client_type == 'vm':
        run(['/usr/sbin/qm', 'shutdown', clientid])
    elif client_type == 'lxc':
        run(['/usr/bin/lxc-stop', clientid])
    else:
        print('Unable to stop {clientid}. Invalid client type or client id')
        print(f'client_type: {client_type}')
        print(f'client id: {clientid}')


def call_startup(client_type, clientid):
    if client_type == 'vm':
        run(['/usr/sbin/qm', 'start', clientid])
    elif client_type == 'lxc':
        run(['/usr/bin/lxc-start', clientid])
    else:
        print('invalid client type or client id')


def get_status(client_type, clientid, vmstatus, status_wanted):
    checker = None
    if client_type == 'lxc':
        checker = check_output(['lxc-info', clientid])
    elif client_type == 'vm':
        checker = check_output(['/usr/sbin/qm', 'status', clientid])
    while vmstatus != status_wanted:
        sleep(5)
        vmoutput = checker
        if (str.encode(status_wanted)) in vmoutput.upper():
            vmstatus = status_wanted
    return status_wanted


def print_state(vmtype, vmhost, vmstatus):
    print(f'{vmtype} {vmhost} is {vmstatus}')


# This script is used to restart VMs or LXC containers on a Proxmox host.
# It takes two command line arguments: the type of client (vm or lxc) and a list of client IDs.
# example: ./cron_scripts/power/vm_restart.py "lxc" "['110', '113', '114', '120']"


def main():
    client_type = None
    client_list = None
    try:
        client_type = sys.argv[1]
        client_list = ast.literal_eval(sys.argv[2])
    except Exception as e:
        print(f'Unable to process cli arguments. {e}')
    else:
        print(f'{client_type} {client_list}')
    timestamp = get_time()
    print(f'Start time: {timestamp}')
    for clientid in client_list:
        try:
            print(f'Shutting down {clientid}')
            call_shutdown(client_type, clientid)
            vresult = get_status(client_type, clientid, 'RUNNING', 'STOPPED')
        except Exception as e:
            print(f'Unable to stop container {clientid}: {e}')
        else:
            print_state(client_type.upper(), clientid, vresult)
        try:
            print(f'Starting {clientid}')
            call_startup(client_type, clientid)
            vresult = get_status(client_type, clientid, 'STOPPED', 'RUNNING')
        except Exception as e:
            print(f'Unable to start container {clientid}: {e}')
        else:
            print_state(client_type.upper(), clientid, vresult)
    timestamp = get_time()
    print(f'End time: {timestamp}')


if __name__ == '__main__':
    main()