#!/bin/bash

SSID="CSR"
PASSWORD="CSR_2021"

nmcli connection delete $SSID #delete network to safely test

if [[ -z "$SSID" || -z "$PASSWORD" ]]; then
  echo "Usage: $0 <SSID> <PASSWORD>"
  return 1
fi

echo "Verbinde: $SSID ..."

nmcli dev wifi connect "$SSID" password "$PASSWORD" >/dev/null 2>&1

if [[ $? -ne 0 ]]; then
  echo "Verbinding fehlgeschlagen $SSID"
  return 2
fi

echo "Verbindsaufbau..."

# Wait up to 15 seconds for connection
for i in {1..15}; do
  STATE=$(nmcli -t -f WIFI g)
  if [[ "$STATE" == "enabled" ]]; then
    CONN=$(nmcli -t -f ACTIVE,SSID dev wifi | grep '^ja' | cut -d: -f2)
    if [[ "$CONN" == "$SSID" ]]; then
      echo "Verbunden mit $SSID"
      break
    fi
  fi
  sleep 1
done

if [[ "$CONN" != "$SSID" ]]; then
  echo "Verbindingsfehler"
  return 3
fi

echo "Teste (ping 8.8.8.8)..."

ping -c 3 8.8.8.8 >/dev/null 2>&1
PING_STATUS=$?

if [[ $PING_STATUS -ne 0 ]]; then
  echo "Kein Internet"
  return 4
fi

echo "Ping Erfolg"

echo "Teste HTTP..."

curl -s --max-time 5 https://google.com >/dev/null 2>&1
CURL_STATUS=$?

if [[ $CURL_STATUS -ne 0 ]]; then
  echo "HTTP fehlgeschlagen"
  return 5
fi

echo "Internet funktioniert!"
return 0