"""
SPDX-FileCopyrightText: 2020-present Open Networking Foundation <info@opennetworking.org>
SPDX-License-Identifier: LicenseRef-ONF-Member-1.01
"""
import sys
import re
from datetime import datetime
import time

from flask import Flask, request
import logging as log
from argparse import ArgumentParser, SUPPRESS
import threading

from roc import Roc
from prom import Prometheus
from ping import ping
import device

app = Flask(__name__)

devices = {} # dict imsi:device
lock = threading.Lock()


@app.route("/devices")
def get_devices():
    global devices, lock
    with lock:
        all = {}
        for _, device in devices.items():
            all[device.imsi_id] = {'ip':device.ip, 'imsi':device.imsi, 'last_reachable':'{:%Y-%m-%d %H:%M:%S}'.format(device.last_reachable)}
    return all

@app.route("/devices/reachable")
def get_devices_reachable():
    global devices, lock
    with lock:
        reachable = {}
        for _, device in devices.items():
            if device.reachable is True:
                reachable[device.imsi_id] = {'ip':device.ip, 'imsi':device.imsi, 'last_reachable':'{:%Y-%m-%d %H:%M:%S}'.format(device.last_reachable)}
    return reachable

@app.route("/devices/unreachable")
def get_devices_unreachable():
    global devices, lock
    with lock:
        unreachable = {}
        for _, device in devices.items():
            if device.reachable is False:
                unreachable[device.imsi_id] = {'ip':device.ip, 'imsi':device.imsi, 'last_reachable':'{:%Y-%m-%d %H:%M:%S}'.format(device.last_reachable)}
    return unreachable


def build_argparser():
    parser = ArgumentParser(add_help=False)
    args = parser.add_argument_group('Options')
    args.add_argument('-h', '--help',
                      action='help',
                      default=SUPPRESS,
                      help='Show this help message and exit.')
    args.add_argument("--user",
                      help="ROC username",
                      type=str)
    args.add_argument("--password",
                      help="ROC password",
                      type=str)
    args.add_argument("--token",
                      help="Rancher bearer token",
                      type=str)
    args.add_argument("--port",
                      help="Service port",
                      type=str,
                      default="3333")
    return parser

def update(roc, prom, old):
    new = roc.update_devices(old)
    if new is not None:
        new = prom.update_devices(new)
    else:
        new = old
    return new

def probe(devices):
    for imsi_id, device in devices.items():
        if device.ip is None:
            continue
        if ping(device.ip):
            device.reachable = True
            device.last_reachable = datetime.now()
            log.info("{}/{}/{} - reachable".format(device.imsi_id, device.imsi, device.ip))
        else:
            device.reachable = False
            log.info("{}/{}/{} - unreachable".format(device.imsi_id, device.imsi, device.ip))

def work_thread(roc, prom):
    global devices, lock
    while True:
        new = update(roc, prom, devices)
        probe(new)
        with lock:
            devices = new

        time.sleep(5)

if __name__ == '__main__':

    log.basicConfig(
        format='%(asctime)s %(levelname)-8s %(message)s',
        level=log.DEBUG,
        datefmt='%Y-%m-%d %H:%M:%S',
        stream=sys.stdout)

    log.info("Starting network-diag-app...")

    args = build_argparser().parse_args()

    roc = Roc(args.user, args.password)
    prom = Prometheus(args.token.split(':')[0], args.token.split(':')[1])

    t = threading.Thread(target=work_thread, args=(roc, prom,))
    t.start()

    app.run('0.0.0.0', args.port)