#!/bin/bash
#########################################################
# This script is intended to be run like this:
#
#   curl https://dvn.pt/power-miab | sudo bash
#
#########################################################

# Are we running as root?
if [[ $EUID -ne 0 ]]; then
	echo "This script must be run as root. Did you leave out sudo?"
	exit 1
fi

if [ ! -f /usr/bin/lsb_release ]; then
	# Try installing it (apt install lsb-release)
	if [ ! -f /usr/bin/apt-get ]; then
		echo "This operating system does not have apt-get! This means it is unsupported!"
		echo "This script must be run on a system running one of the following OS-es:"
		echo "* Debian 10 (buster)"
		echo "* Debian 11 (bullseye)"
		echo "* Ubuntu 20.04 LTS (Focal Fossa)"
		exit 1
	fi

	echo "Installing lsb-release to understand which operating system we're running..."
	apt-get -q -q update
	DEBIAN_FRONTEND=noninteractive apt-get -q -q install -y lsb-release < /dev/null
fi

if [ -z "$TAG" ]; then
	# Make sure we're running on the correct operating system
	OS=$(lsb_release -d | sed 's/.*:\s*//')
	if  [ "$OS" == "Debian GNU/Linux 10 (buster)" ] ||
		[ "$OS" == "Debian GNU/Linux 11 (bullseye)" ] ||
		[ "$(echo $OS | grep -o 'Ubuntu 20.04')" == "Ubuntu 20.04" ]
	then
		TAG=v56.2
	else
		echo "This script must be run on a system running one of the following OS-es:"
		echo "* Debian 10 (buster)"
		echo "* Debian 11 (bullseye)"
		echo "* Ubuntu 20.04 LTS (Focal Fossa)"
		exit 1
	fi
fi

# Clone the Mail-in-a-Box repository if it doesn't exist.
if [ ! -d $HOME/mailinabox ]; then
	if [ ! -f /usr/bin/git ]; then
		echo Installing git . . .
		apt-get -q -q update
		DEBIAN_FRONTEND=noninteractive apt-get -q -q install -y git < /dev/null
		echo
	fi

	echo Downloading Mail-in-a-Box $TAG. . .
	git clone \
		-b $TAG --depth 1 \
		https://github.com/ddavness/power-mailinabox \
		$HOME/mailinabox \
		< /dev/null 2> /dev/null

	echo
fi

# Change directory to it.
cd $HOME/mailinabox

# Update it.
if [ "$TAG" != "$(git describe --tags)" ]; then
	echo Updating Mail-in-a-Box to $TAG . . .
	git fetch --depth 1 --force --prune origin tag $TAG
	if ! git checkout -q $TAG; then
		echo "Update failed. Did you modify something in $(pwd)?"
		exit 1
	fi
	echo
fi

# Start setup script.
setup/start.sh