#!/bin/bash

#install autohotspot from raspberrypiconnect.com
#http://www.raspberryconnect.com/network/item/330-raspberry-pi-auto-wifi-hotspot-switch-internet
#This version will provide internet when using the hotspot IF an ethernet cable is plugged in"
#This will be useful with AREDN mesh networking
#This script is for Buster ONLY
#Stretch users should use https://github.com/km4ack/pi-scripts/blob/master/autohotspotN-setup
#km4ack 20190923
#km4ack 20200513 mod for BAP script

shackwifi=$1
shackpass=$2
wifipasswd=$3
#escape all "&" incase used in HS password
wifipasswd=$(sed 's|&|\\&|g' <<< $wifipasswd)


#unblock wifi
#needed after buster 20200205
rfkill unblock all > /dev/null 2>&1

#install hostapd, dnsmasq
apt-get install -y hostapd
apt-get install -y dnsmasq

#remove hostapd mask
systemctl unmask hostapd

#stop both services
systemctl disable hostapd
systemctl disable dnsmasq

mkdir -p $HOME/temp
cd $HOME/temp

wget http://www.raspberryconnect.com/images/Autohotspot/autohotspot-95-4/hostapd.txt

#set new hotspot passwd
sed -i "s|wpa_passphrase=1234567890|wpa_passphrase=$wifipasswd|" $HOME/temp/hostapd.txt
#set country to US
sed -i 's/country_code=GB/country_code=US/' $HOME/temp/hostapd.txt

#move hostapd to correct location
mv $HOME/temp/hostapd.txt /etc/hostapd/hostapd.conf

sed -i s'/#DAEMON_CONF=""/DAEMON_CONF="\/etc\/hostapd\/hostapd.conf"/' /etc/default/hostapd
sed -i s'/DAEMON_OPTS=""/#DAEMON_OPTS=""/' /etc/default/hostapd

#add needed info to dnsmasq.conf
echo "#AutoHotspot config" >> /etc/dnsmasq.conf
echo "interface=wlan0" >> /etc/dnsmasq.conf
echo "bind-dynamic" >> /etc/dnsmasq.conf
echo "server=8.8.8.8" >> /etc/dnsmasq.conf
echo "domain-needed" >> /etc/dnsmasq.conf
echo "bogus-priv" >> /etc/dnsmasq.conf
echo "dhcp-range=10.10.10.150,10.10.10.200,255.255.255.0,12h" >> /etc/dnsmasq.conf
echo "#Set up redirect for email.com" >> /etc/dnsmasq.conf
echo "dhcp-option=3,10.10.10.10" >> /etc/dnsmasq.conf
echo "address=/email.com/10.10.10.10" >> /etc/dnsmasq.conf

mv /etc/network/interfaces /etc/network/interfaces.org

echo "source-directory /etc/network/interfaces.d" >> /etc/network/interfaces


echo "nohook wpa_supplicant" >> /etc/dhcpcd.conf

#setup ip forward
sed 's/#net.ipv4.ip_forward=1/net.ipv4.ip_forward=1/' /etc/sysctl.conf

cd $HOME/temp

wget http://www.raspberryconnect.com/images/autohotspotN/autohotspotn-95-4/autohotspot-service.txt

#create autohotspot service file
mv autohotspot-service.txt /etc/systemd/system/autohotspot.service

#start autohotspot service
systemctl enable autohotspot.service

#check if iw installed. install if not

iwcheck=$(dpkg --get-selections | grep -w "iw")
if [ -z "iw" ]
then
apt-get install iw
fi

#install autohotspot script
cd $HOME/temp
wget http://www.raspberryconnect.com/images/autohotspotN/autohotspotn-95-4/autohotspotN.txt
#mod ip address for our custom setup
sed -i 's/192.168.50.5/10.10.10.10/' autohotspotN.txt
mv autohotspotN.txt /usr/bin/autohotspotN
chmod +x /usr/bin/autohotspotN

#add shack wifi to wpa_supplicant.conf
echo "network={" >> /etc/wpa_supplicant/wpa_supplicant.conf
echo "ssid=\"$shackwifi\"" >> /etc/wpa_supplicant/wpa_supplicant.conf
echo "psk=\"$shackpass\"" >> /etc/wpa_supplicant/wpa_supplicant.conf
echo "key_mgmt=WPA-PSK" >> /etc/wpa_supplicant/wpa_supplicant.conf
echo "}" >> /etc/wpa_supplicant/wpa_supplicant.conf