#! /bin/bash
# vim: set tabstop=4 shiftwidth=4 noexpandtab filetype=sh:

# update/index.txt - upgrade path from Ivan's a2cloud tree
#
# Ivan's a2cloud installed with a single copy-paste of a command line that
# downloaded a script and ran it sight-unseen.  It also installed alias
# commands that would perform a similar one-liner to upgrade a2cloud to the
# latest version.  This script provides that interface for upgrades.

a2cBranch="master"
a2cScriptURL="https://raw.githubusercontent.com/RasppleII/a2cloud/${a2cBranch}"
a2cTarball="https://github.com/RasppleII/a2cloud/archive/${a2cBranch}.tar.gz"

# Set a2cSource to the location of the source tree if we're running in one
a2cSource="$( dirname "${BASH_SOURCE[0]}" )/.."
pushd $a2cSource >/dev/null
a2cSource="$PWD"
popd >/dev/null
if [[ ! -f "$a2cSource/.a2cloud_source" ]]; then
	a2cWebUpdate=1
	a2cSource=$(mktemp -d /tmp/a2cloud.XXXXXXXXXXXX)
fi

installedVersion=
if [[ -f /usr/local/etc/A2CLOUD-version ]]; then
	read installedVersion < /usr/local/etc/A2CLOUD-version
	# Convert old three-digit version if needed
    if [[ $installedVersion != *.*.* ]]; then
        installedVersion="${installedVersion:0:1}.${installedVersion:1:1}.${installedVersion:2}"
    fi
fi

autoAnswerYes=
for arg in $@; do
	if [[ $arg == "-y" ]]; then
		autoAnswerYes=1
		break
	fi
done

printf "\na2cloud web install\n\n"

if (( $a2cWebUpdate )); then
	newVersion=$(wget -qO- "${a2cScriptURL}/install.sh" | grep '^a2cloudVersion' | cut -d '"' -f 2)
	cat <<-EOT
	You've started the single command a2cloud install script.  This script will
	download things behind the scenes, run them without much verification, and
	then it will delete what it ran whether the upgrade finished successfully or
	not.  For this reason, we are going to be phasing this script out in the
	future, but it still does what you expect for now.
	EOT
else
	newVersion=$(grep '^a2cloudVersion' "$a2cSource/install.sh" | cut -d '"' -f 2)
	cat <<-EOT
	You've started the single command a2cloud install script from inside the
	a2cloud source directory for version $newVersion.  This script will only
	install or update to that version.
	EOT
fi

cat <<EOT

installed version: ${installedVersion:-None}
available version: ${newVersion}

EOT

if [[ ! $autoAnswerYes ]]; then
	printf "Do you want to install (or update) a2cloud? "
	read
	if [[ ${REPLY:0:1} != "y" && ${REPLY:0:1} != "Y" ]]; then
		printf "\nOkay, not installing anything now!\n\n"
		exit 1
	fi
fi

if (( $a2cWebUpdate )); then
	a2cSource=$(mktemp -d /tmp/a2cloud.XXXXXXXXXXXX)

	# Normally tarballs unpack in a subdirectory, but we want it to unpack into
	# $a2cSource directly (even though the directory has the tarball in it.)
	printf "\na2cloud: Downloading installer to $a2cSource.\n"
	wget -O "$a2cSource/a2cloud-$a2cBranch.tar.gz" "$a2cTarball"
	tar -C $a2cSource --strip-components=1 -zxf "$a2cSource/a2cloud-${a2cBranch}.tar.gz"
fi

# Now we actually run the installer as if we were installing it by hand
printf "\na2cloud: Running the installer now.\n"
"${a2cSource}/install.sh" "$@"

if (( $a2cWebUpdate )); then
	printf "\na2cloud: Finished with installer, now deleting ${a2cSource}.\n"
	rm -rf "$a2cSource"
fi