#!/usr/bin/env python3
from flask import Flask, request, Response
from twilio_send import send_sms
import datetime

app = Flask(__name__)

@app.route('/grafana_webhook', methods=['POST'])
def respond_2_grafana():
    print(request.json)
    allowed_Url = 'https://grafana.home:443/'    # Basic source authentication, fill with the URL of your Grafana server
    allowed_remote_addr = ["127.0.0.1"]          # Only webhooks form these addresses are allowed to send SMS
    payload = f"Grafana alert: {datetime.datetime.now().strftime('%d-%m-%Y %H:%M:%S')}\n\n" \
              f"Alert type: \"{request.json['ruleName']}\"\n\n" \
              f"Alert state: \"{request.json['state']}\"\n\n" \
              f"Message: \"{request.json['message']}\"\n\n" \
              f"Metric.     Value.\n"
    for metric in request.json['evalMatches']:
        payload += f"{metric['metric']}     {metric['value']}\n"
    if request.json["ruleUrl"].startswith(allowed_Url) and request.remote_addr in allowed_remote_addr:
        send_sms(payload)
    else:
        print(f"Bad request source. {request.remote_addr} / {request.json['ruleUrl']}")
        return Response(status=418)
    return Response(status=200)