#!/bin/bash

function WIFI(){
	local OUT_FILE=$1
	SSID="CSR_Gastzugang"
	PASSWORD="CSR_2021"
	#delete network to safely test
	nmcli connection delete $SSID 
	if [[ -z "$SSID" || -z "$PASSWORD" ]]; then
  		echo "Usage: $0 <SSID> <PASSWORD>"
		echo -e "WIFI:\t Nein"  >>"$OUT_FILE"
  		return 1
	fi
	echo "Verbinde: $SSID ..."
	nmcli dev wifi connect "$SSID" password "$PASSWORD" >/dev/null 2>&1
	if [[ $? -ne 0 ]]; then
  		echo "Verbinding fehlgeschlagen $SSID"
		echo -e "WIFI:\t Nein"  >>"$OUT_FILE"
  		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" != "$SSID" ]]; then
  		echo "Verbindingsfehler"
		echo -e "WIFI:\t Nein"  >>"$OUT_FILE"
  		return 3
	fi

	echo "Teste (ping 8.8.8.8)..."

	ping -c 3 8.8.8.8 >/dev/null 2>&1
	PING_STATUS=$?
	if [[ $PING_STATUS -ne 0 ]]; then
  		echo "Kein Internet"
		echo -e "WIFI:\t Nein"  >>"$OUT_FILE"
  		return 4
	fi

	echo "Ping Erfolg"

	echo "Teste HTTP..."
	curl -s --max-time 5 https://google.com >/dev/null 2>&1
	CURL_STATUS=$?
	if [[ $CURL_STATUS -ne 0 ]]; then
  		echo "HTTP fehlgeschlagen"
		echo -e "WIFI:\t Nein"  >>"$OUT_FILE"
  		return 5
	fi

	echo "Internet funktioniert!"
	echo -e "WIFI:\t Ja"  >>"$OUT_FILE"
	return 0
	
}