#!/bin/bash

#    ap-setup.sh
#    OpenDRS Online Discrepancy Reporting System
#    Copyright (C) 2022  Rod Wright

#    SPDX-License-Identifier: GPL-2.0

# Wireless Access Point Raspberry Pi Setup
current_user=`whoami`
if [ "$current_user" != "root" ]
then
	echo "You must have root privileges to run this setup."
	echo "Try 'sudo ./ap-setup-hostapd.sh'"
	exit 1
fi
source ../common.sh
echo ""
getmodel
echo ""
getosrelease
echo ""
getarch
echo ""
if [ $arch_32_64 -eq 64 -a "$ismodel3" = "true" ]
then
    echo "Raspberry Pi 3 hardware is known to have problems with acting as a"
    echo "wireless access point when 64 bit kernels are used. If you intend for"
    echo "this terminal to act as a wireless access point, you should stop here,"
    echo "power off, remove the microsd card and re-image using a 32 bit version"
    echo "of Raspberry Pi OS."
    echo -n "Ignore and [c]ontinue or [A]bort? [c/A]: "
    read archabort
    if [ "$archabort" = "C" -o "$archabort" = "c" ]
	then
        echo ""
        echo "Continuing with installation."
    else
        echo ""
        echo "Aborting installation."
        exit 0
    fi
fi
echo ""
echo "If this terminal connects to a network using ethernet, it can be configured"
echo "as a wireless access point for other terminals. Would you like to configure"
echo -n "this terminal as an access point? [y/N]: "
read wapconf
if [ "$wapconf" = "Y" -o "$wapconf" = "y" ]
then
	echo "Configuring as wireless access point."
	echo ""
	echo "Copying files..."
	chmod +x apsetup/usr/local/bin/*
	cp -v apsetup/usr/local/bin/* /usr/local/bin
	cp -Rv apsetup/etc/* /etc
	echo ""
	wapssidok=0
	while [ "$wapssidok" -ne 1 ]
	do
		echo "This access point will need an SSID. This is what will appear"
		echo "as the name of this terminal when other devices connect."
		echo -n "Please enter the desired SSID for this access point:  "
		read wapssid
		if [ "$wapssid" = "" ]
		then
			echo "SSID cannot be blank. Try again."
		else
			wapssidok=1
		fi
	done
	wappassok=0
	while [ "$wappassok" -ne 1 ]
	do
		echo "You will need to set a passphrase for this access point. It should"
		echo "be at least 8 characters in length and cannot be blank."
		echo -n "Please enter the desired passphrase for this access point:  "
		read wappass
		wappasslen=`echo -n $wappass | wc -m`
		if [ "$wappass" = "" -o "$wappasslen" -lt 8 ]
		then
			echo "Passphrase doesn't satisfy requirements above. Try again."
		else
			wappassok=1
		fi
	done
	# Create network bridge interface
    nmcli connection add type bridge con-name 'Bridge' ifname bridge0
    # Add ethernet connection to the bridge
    nmcli connection add type ethernet slave-type bridge con-name 'Ethernet' ifname eth0 master bridge0
    # Create wireless interface and add it to the bridge
    nmcli connection add con-name 'Hotspot' ifname wlan0 type wifi slave-type bridge master bridge0 \
    wifi.mode ap wifi.ssid $wapssid wifi-sec.key-mgmt wpa-psk \
    wifi-sec.proto rsn wifi-sec.pairwise ccmp \
    wifi-sec.psk $wappass
    # Activate bridge
    nmcli connection up Bridge
    # Activate access point
    nmcli connection up Hotspot
	echo ""
	echo "Wireless access point setup is complete."
	echo ""
	echo -n "Press enter key to continue..."
	read cont
else
	exit 2
fi