#!/usr/bin/env python3

from nilmdb.client.httpclient import HTTPClient, ClientError, ServerError
from nilmdb.utils.printf import *
import datetime_tz
import nilmrun

import argparse
import os

def main():
    """List NilmRun processes"""
    def_url = os.environ.get("NILMRUN_URL", "http://localhost/nilmrun/")
    parser = argparse.ArgumentParser(
        description = 'List NilmRun processes',
        formatter_class = argparse.ArgumentDefaultsHelpFormatter)
    parser.add_argument("-v", "--version", action="version",
                        version=nilmrun.__version__)
    group = parser.add_argument_group("Standard options")
    group.add_argument('-u', '--url',
                       help = 'NilmRun server URL', default = def_url)
    group.add_argument('-n', '--noverify', action="store_true",
                       help = 'Disable SSL certificate verification')
    args = parser.parse_args()

    client = HTTPClient(baseurl = args.url, verify_ssl = not args.noverify)
    # Print overall system info
    info = client.get("process/info")
    total = info['total']
    system = info['system']
    printf(" procs: %d nilm, %d other\n", info['total']['procs'],
           info['system']['procs'] - info['total']['procs'])
    printf("   cpu: %d%% nilm, %d%% other, %d%% max\n",
           round(info['total']['cpu_percent']),
           round(info['system']['cpu_percent'] - info['total']['cpu_percent']),
           round(info['system']['cpu_max']))
    printf("   mem: %d MiB used, %d MiB total, %d%%\n",
           round(info['system']['mem_used'] / 1048576.0),
           round(info['system']['mem_total'] / 1048576.0),
           round(info['system']['mem_used'] * 100.0
                 / info['system']['mem_total']))

    # Print process detail for each managed process
    fmt = "%-36s %-6s %-15s %-4s %-3s %-5s\n"
    printf(fmt, "PID", "STATE", "SINCE", "PROC", "CPU", "LOG")

    if len(info['pids']) == 0:
        printf("No running processes\n")
        raise SystemExit(0)

    for pid in sorted(info['pids'].keys()):
        pidinfo = client.get("process/status", { "pid": pid })
        if pidinfo['alive']:
            status = "alive"
        else:
            if pidinfo['exitcode']:
                status = "error"
            else:
                status = "done"
        dt = datetime_tz.datetime_tz.fromtimestamp(pidinfo['start_time'])
        since = dt.strftime("%m/%d-%H:%M:%S")
        printf(fmt, pid, status, since, info['pids'][pid]['procs'],
               str(int(round(info['pids'][pid]['cpu_percent']))),
               len(pidinfo['log']))

if __name__ == "__main__":
    main()