#!/bin/bash
#
# .---.                  .              .
# |                      |              |
# |--- .--. .-.  .-.  .-.|  .-. .--.--. |.-.  .-. .--.  .-.
# |    |   (.-' (.-' (   | (   )|  |  | |   )(   )|  | (.-'
# '    '     --'  --'  -' -  -' '  '   -' -'   -' '   -  --'
#
#                    Freedom in the Cloud
#
# Creates a debian image using vmdebootstrap
#
# To shut down after error: fuser -mvk /tmp/tmpdir/build
#
# License
# =======
#
# Copyright (C) 2015-2016 Bob Mottram <bob@robotics.uk.to>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

PROJECT_NAME='freedombone'

export TEXTDOMAIN=${PROJECT_NAME}-image
export TEXTDOMAINDIR="/usr/share/locale"

PROJECT_REPO="https://github.com/bashrc/${PROJECT_NAME}"

# recommended RAM for virtual machines
VM_MEMORY='1G'

VARIANT='full'

# fixed username and password when the --generic option is used
GENERIC_IMAGE_USERNAME='fbone'
GENERIC_IMAGE_PASSWORD='freedombone'

IMAGE_TYPE='beaglebone'
CURR_DIR=$(pwd)
CURR_USER=$(echo $USER)
TEMPBUILD_DIR=~/.tmp_${PROJECT_NAME}_build
VMDEBOOTSTRAP_REPO=git://git.liw.fi/vmdebootstrap
VMDEBOOTSTRAP_VERSION=0.8
MAKEFILE=${PROJECT_NAME}-image-makefile
IMAGE_SIZE=8G
IMAGE_SIZE_SPECIFIED=
IMAGE_NAME='full'

USERNAME=$(echo $USER)
PASSWORD=

# IP address of the router (gateway)
ROUTER_IP_ADDRESS="192.168.1.254"

# The fixed IP address of the Beaglebone Black (or other SBC) on your local network
BOX_IP_ADDRESS="192.168.1.55"

# DNS
NAMESERVER1='213.73.91.35'
NAMESERVER2='85.214.20.141'

# An optional freedombone configuration file
CONFIG_FILENAME=

DEFAULT_DOMAIN_NAME="${PROJECT_NAME}.local"

# Minimum number of characters in a password
MINIMUM_PASSWORD_LENGTH=$(cat /usr/share/${PROJECT_NAME}/utils/${PROJECT_NAME}-utils-passwords | grep 'MINIMUM_PASSWORD_LENGTH=' | head -n 1 | awk -F '=' '{print $2}')

# Optional ssh public key to allow
SSH_PUBKEY="no"

# interactive mode
INTERACTIVE="no"

# Whether this is a generic image for mass redistribution on the interwebs
GENERIC_IMAGE="yes"

# Whether to reduce the number of decisions during interactive install
MINIMAL_INSTALL="yes"

# default SSH port
SSH_PORT=2222

# Whether sites are accessible only within a Tor browser
ONION_ONLY="no"

# Where to fetch packages
#MIRROR='http://httpredir.debian.org/debian'
MIRROR='http://ftp.de.debian.org/debian'

# Whether to only install debian but nothing else
DEBIAN_INSTALL_ONLY='no'

# wifi settings
WIFI_INTERFACE='wlan0'
WIFI_SSID=
WIFI_TYPE='wpa2-psk'
WIFI_PASSPHRASE=
WIFI_HOTSPOT='no'
WIFI_NETWORKS_FILE=~/${PROJECT_NAME}-wifi.cfg

# Whether to install non-free wifi drivers for the mesh client
INSECURE='no'

# for mesh installs whether to delete all data and generate
# a new identity at every shutdown/boot
AMNESIC='no'

mesh_router_setup_script() {
	# create a setup script for a mesh router
	mesh_script_filename=$1
	echo "MY_USERNAME=${USERNAME}" > $mesh_script_filename
	echo "DEFAULT_DOMAIN_NAME=${USERNAME}" >> $mesh_script_filename
	echo 'SYSTEM_TYPE=mesh' >> $mesh_script_filename
	echo 'INSTALLING_ON_BBB=no' >> $mesh_script_filename
	echo 'USB_DRIVE=/dev/sda1' >> $mesh_script_filename
	echo 'DDNS_PROVIDER=' >> $mesh_script_filename
	echo 'DDNS_USERNAME=' >> $mesh_script_filename
	echo 'DDNS_PASSWORD=' >> $mesh_script_filename
	echo 'DEFAULT_LANGUAGE=en_GB.UTF-8' >> $mesh_script_filename
	echo 'MY_EMAIL_ADDRESS=' >> $mesh_script_filename
	echo 'ENABLE_CJDNS=no' >> $mesh_script_filename
	echo 'ENABLE_BATMAN=yes' >> $mesh_script_filename
	echo 'ENABLE_BABEL=no' >> $mesh_script_filename
	echo 'DEBIAN_REPO=' >> $mesh_script_filename
	echo 'NAMESERVER1=' >> $mesh_script_filename
	echo 'NAMESERVER2=' >> $mesh_script_filename
	echo 'BATMAN_CELLID=any' >> $mesh_script_filename
	echo 'WIFI_CHANNEL=9' >> $mesh_script_filename
}

while [[ $# > 1 ]]
do
	key="$1"

	case $key in
		-h|--help)
			show_help
			;;
		-c|--config)
			shift
			CONFIG_FILENAME="$1"
			if [ ! -f $CONFIG_FILENAME ]; then
				echo $"Config file $CONFIG_FILENAME not found"
				exit 3
			fi
			DEFAULT_DOMAIN_NAME=$(cat $CONFIG_FILENAME | grep 'DEFAULT_DOMAIN_NAME' | awk -F '=' '{print $2}')
			;;
		-t|--target|--board)
			shift
			IMAGE_TYPE="$1"
			;;
		-u|--user|--username)
			shift
			USERNAME="$1"
			;;
		-p|--password)
			shift
			PASSWORD="$1"
			if [ ${#PASSWORD} -lt $MINIMUM_PASSWORD_LENGTH ]; then
				echo $"Your password chould contain at least ${MINIMUM_PASSWORD_LENGTH} characters"
				exit 3628
			fi
			;;
		--sshkey|--sshpubkey|--pubkey)
			shift
			SSH_PUBKEY="$1"
			;;
		-s|--size)
			shift
			IMAGE_SIZE="$1"
			IMAGE_SIZE_SPECIFIED=1
			;;
		# Box static IP address on the LAN
		--ip)
			shift
			BOX_IP_ADDRESS="$1"
			;;
		# Router IP address on the LAN
		--iprouter)
			shift
			ROUTER_IP_ADDRESS="$1"
			;;
		# nameserver 1
		--ns1|--nameserver1)
			shift
			NAMESERVER1="$1"
			;;
		# nameserver 2
		--ns2|--nameserver2)
			shift
			NAMESERVER2="$1"
			;;
		-i|--interactive)
			shift
			INTERACTIVE="$1"
			;;
		-g|--generic)
			shift
			GENERIC_IMAGE="$1"
			;;
		--minimal)
			shift
			MINIMAL_INSTALL="$1"
			;;
		--ssh|--sshport)
			shift
			SSH_PORT="$1"
			;;
		-v|--variant)
			shift
			VARIANT="$1"
			;;
		-o|--onion)
			shift
			ONION_ONLY="$1"
			;;
		-a|--amnesic)
			shift
			AMNESIC="$1"
			;;
		-r|--repo|--repository)
			shift
			PROJECT_REPO="$1"
			;;
		-m|--mirror)
			shift
			MIRROR="$1"
			;;
		--debianonly|--basic|--minimal)
			shift
			DEBIAN_INSTALL_ONLY="$1"
			;;
		--interface|--if)
			shift
			WIFI_INTERFACE="$1"
			;;
		--ssid|--essid)
			shift
			WIFI_SSID="$1"
			;;
		--wifitype)
			shift
			WIFI_TYPE="$1"
			;;
		--wifipass|--passphrase)
			shift
			WIFI_PASSPHRASE="$1"
			;;
		--hotspot)
			shift
			if [[ $"$1" == $'yes' || $"$1" == $'y' ]]; then
				WIFI_HOTSPOT='yes'
			fi
			;;
		--networks)
			shift
			WIFI_NETWORKS_FILE="$1"
			;;
		--insecure)
			shift
			INSECURE="$1"
			;;
		*)
			# unknown option
			;;
	esac
	shift
done

if [[ $INTERACTIVE == "yes" || $INTERACTIVE == "y" || $INTERACTIVE == "Yes" ]]; then
	${PROJECT_NAME}-config --minimal "$MINIMAL_INSTALL"
	if [ -f freedombone.cfg ]; then
		CONFIG_FILENAME=freedombone.cfg
		DEFAULT_DOMAIN_NAME=$(cat $CONFIG_FILENAME | grep 'DEFAULT_DOMAIN_NAME' | awk -F '=' '{print $2}')
	fi
fi

if [[ $GENERIC_IMAGE == "yes" ]]; then
	USERNAME=$GENERIC_IMAGE_USERNAME
	PASSWORD=$GENERIC_IMAGE_PASSWORD
fi

if [ ! $PASSWORD ]; then
	# generate a random password
	PASSWORD="$(openssl rand -base64 30 | cut -c1-${MINIMUM_PASSWORD_LENGTH})"
fi

# Move any existing images into a build subdirectory
image_types=( xz img sig vdi qcow2 )
for im in "${image_types[@]}"
do
	no_of_files=$(ls -afq ${CURR_DIR}/${PROJECT_NAME}*.${im} | wc -l)
	if (( no_of_files > 0 )); then
		if [ ! -d ${CURR_DIR}/build ]; then
			mkdir ${CURR_DIR}/build
		fi
		mv -f ${CURR_DIR}/${PROJECT_NAME}*.${im} ${CURR_DIR}/build
	fi
done

# Delete anything which didn't move
for im in "${image_types[@]}"
do
	no_of_files=$(ls -afq ${CURR_DIR}/${PROJECT_NAME}*.${im} | wc -l)
	if (( no_of_files > 0 )); then
		rm -f ${CURR_DIR}/${PROJECT_NAME}*.${im}
	fi
done

# Remove any existing login credentials file
if [ -f ${CURR_DIR}/${PROJECT_NAME}_login_credentials.txt ]; then
	rm ${CURR_DIR}/${PROJECT_NAME}_login_credentials.txt
fi

if [ -d $TEMPBUILD_DIR ]; then
	rm -rf $TEMPBUILD_DIR
fi
mkdir -p $TEMPBUILD_DIR
if [ -f /usr/local/bin/$MAKEFILE ]; then
	cp /usr/local/bin/$MAKEFILE $TEMPBUILD_DIR/Makefile
else
	cp /usr/bin/$MAKEFILE $TEMPBUILD_DIR/Makefile
fi

cp -r /etc/${PROJECT_NAME}/* $TEMPBUILD_DIR
rm -rf $TEMPBUILD_DIR/vendor
chown -R $CURR_USER:$CURR_USER $TEMPBUILD_DIR
cd $TEMPBUILD_DIR

if [[ $MINIMAL_INSTALL == "yes" ]]; then
	IMAGE_NAME=$'min'
fi

if [[ $ONION_ONLY != "no" ]]; then
	IMAGE_NAME=$'onion'
fi

if [[ $VARIANT == 'mesh' ]]; then
	IMAGE_NAME=$'mesh'
	# typically not much disk space is needed for a mesh node
	if [ ! $IMAGE_SIZE_SPECIFIED ]; then
		IMAGE_SIZE=2G
	fi
fi

if [[ $VARIANT == 'meshclient' || $VARIANT == 'meshusb' ]]; then
	IMAGE_NAME=$'meshclient'
	if [ ! $IMAGE_SIZE_SPECIFIED ]; then
		IMAGE_SIZE=6G
	fi
fi

if [[ $VARIANT == 'usb' ]]; then
	IMAGE_NAME=$'usb'
fi

# append amnesic to the image name if needed
if [[ $AMNESIC != 'no' ]]; then
	IMAGE_NAME="${IMAGE_NAME}-amnesic"
fi

cd $TEMPBUILD_DIR
make $IMAGE_TYPE \
	 MYUSERNAME="$USERNAME" \
	 MYPASSWORD="$PASSWORD" \
	 ROUTER_IP_ADDRESS="$ROUTER_IP_ADDRESS" \
	 BOX_IP_ADDRESS="$BOX_IP_ADDRESS" \
	 NAMESERVER1="$NAMESERVER1" \
	 NAMESERVER2="$NAMESERVER2" \
	 PROJECT_NAME="$PROJECT_NAME" \
	 CONFIG_FILENAME="$CONFIG_FILENAME" \
	 IMAGE_SIZE="$IMAGE_SIZE" \
	 SSH_PUBKEY="$SSH_PUBKEY" \
	 GENERIC_IMAGE="$GENERIC_IMAGE" \
	 MINIMAL_INSTALL="$MINIMAL_INSTALL" \
	 SSH_PORT="$SSH_PORT" \
	 ONION_ONLY="$ONION_ONLY" \
	 IMAGE_NAME="$IMAGE_NAME" \
	 PROJECT_REPO="$PROJECT_REPO" \
	 MIRROR="$MIRROR" \
	 BUILD_MIRROR="$MIRROR" \
	 DEBIAN_INSTALL_ONLY="$DEBIAN_INSTALL_ONLY" \
	 WIFI_INTERFACE="$WIFI_INTERFACE" \
	 WIFI_SSID="$WIFI_SSID" \
	 WIFI_TYPE="$WIFI_TYPE" \
	 WIFI_PASSPHRASE="$WIFI_PASSPHRASE" \
	 WIFI_HOTSPOT="$WIFI_HOTSPOT" \
	 WIFI_NETWORKS_FILE="$WIFI_NETWORKS_FILE" \
	 VARIANT="$VARIANT" \
	 MINIMUM_PASSWORD_LENGTH="$MINIMUM_PASSWORD_LENGTH" \
	 INSECURE="$INSECURE" \
	 AMNESIC="$AMNESIC"

if [ ! "$?" = "0" ]; then
	echo $'Build failed'
	rm -rf $TEMPBUILD_DIR
	exit 1
fi

EXPECTED_EXTENSION='xz'
if [[ $IMAGE_TYPE == "qemu"* ]]; then
	EXPECTED_EXTENSION='qcow2'
fi
if [[ $IMAGE_TYPE == "virtualbox"* ]]; then
	EXPECTED_EXTENSION='vdi'
fi

shopt -s nullglob
imgfiles=(build/${PROJECT_NAME}*.${EXPECTED_EXTENSION})
if [ ${#imgfiles[@]} -eq 0 ]; then
	echo $'Image was not created'
	rm -rf $TEMPBUILD_DIR
	exit 2
fi

# Move images from temporary directory to the current directory
for im in "${image_types[@]}"
do
	no_of_files=$(ls -afq build/${PROJECT_NAME}*.${im} | wc -l)
	if (( no_of_files > 0 )); then
		mv build/${PROJECT_NAME}*.${im} ${CURR_DIR}/
		sudo chown ${CURR_USER}:${CURR_USER} ${CURR_DIR}/*.${im}
	fi
done

# Remove the temporary directory
rm -rf ${TEMPBUILD_DIR}

cd ${CURR_DIR}

clear
if [[ $VARIANT != 'meshclient' && $VARIANT != 'meshusb' && $VARIANT != 'mesh' ]]; then
	echo $"
Image was created.

You will be able to log into it with:
"
	if [[ $IMAGE_TYPE != "virtualbox"* && $IMAGE_TYPE != "qemu"* ]]; then
		echo $"    ssh $USERNAME@$DEFAULT_DOMAIN_NAME -p $SSH_PORT

Password: $PASSWORD
"
	else
		if [[ $IMAGE_TYPE != "qemu"* ]]; then
			echo $"    Username: $USERNAME
Password: $PASSWORD
"
		else
			if [[ $IMAGE_TYPE != "qemu-x86_64"* && $IMAGE_TYPE != "qemu-amd64"* ]]; then
				echo "qemu-system-i386 -m ${VM_MEMORY} $(ls ${PROJECT_NAME}*.qcow2)"
			else
				echo "qemu-system-x86_64 -m ${VM_MEMORY} $(ls ${PROJECT_NAME}*.qcow2)"
			fi
			echo $"
Username: $USERNAME
Password: $PASSWORD
"
		fi
	fi
else
		echo $"
Image was created.
"
fi

ls -lh ${PROJECT_NAME}*.img ${PROJECT_NAME}*.sig ${PROJECT_NAME}*.xz ${PROJECT_NAME}*.vdi ${PROJECT_NAME}*.qcow2

# Remove the mesh script after use
if [[ $VARIANT == "mesh"* ]]; then
	rm -f $CONFIG_FILENAME
fi

# record the default login credentials for later use
echo $"Username: $USERNAME
Password: $PASSWORD" > ${CURR_DIR}/${PROJECT_NAME}_login_credentials.txt
chmod 600 ${CURR_DIR}/${PROJECT_NAME}_login_credentials.txt

if [[ $IMAGE_TYPE != "virtualbox"* && $IMAGE_TYPE != "qemu"* ]]; then
	echo ''
	if [[ $VARIANT != 'meshclient' && $VARIANT != 'meshusb' ]]; then
		echo $'You can copy the image to a microSD card with:'
	else
		echo $'You can copy the image to a USB drive with:'
	fi
	echo ''
	echo "    unxz -k ${PROJECT_NAME}*.img.xz"
	echo "    sudo dd bs=1M if=${PROJECT_NAME}*.img of=/dev/sdX conv=fdatasync"
	echo ''
fi

exit 0