#!/bin/bash -e

exec 100> $HOME/homepage.lock

flock 100

src=/srv/data/tsc-cloud/homepage/hugo-page
dst=/srv/http/tsc/hugo
prod=/srv/data/tsc-cloud/homepage/production

cmd="$SSH_ORIGINAL_COMMAND"
# echo "$cmd"

publishToStage=
publishToProduction=y

branch=develop

parseCMD() {
	while [ $# -gt 0 ]
	do
		part="$1"
		shift

		case "$part" in
			stage)
				publishToStage=y
				publishToProduction=
				;;
			--branch)
				branch="$1"
				shift
				;;
			--debug)
				set -x
				;;
			*)
				echo "Unknown command $part"
				exit 1
				;;
		esac
	done
}
parseCMD $cmd

doPublishToStage() {
	rsync -ah --delete --delete-delay public/ "$dst/"
}

doPublishToProduction() {
# This complicated two step publication is required to speed up the transfer.
# The sftp-based production server does not allow to use checksums.
# Hugo recreates all files with the time stamp at building.
# Thus, all files would be transmitted as the time has changed.
# To overcome this, the intermediate cache should have the same times as the upstream server.
	echo "Syncing to intermediate stage"
	rsync -rlpcv --delete --delete-delay public/ $prod/

	echo "Syncing from intermediate stage to production web server"
	rclone sync --stats 3s $prod/ ionos:/

	echo "Cleaning up empty directories"
	rclone rmdirs ionos:/
}

# exit 1

cd "$src"

echo "Fetching the latest git commits"
git fetch

echo "Switching to the latest commit on branch $branch"
git reset --hard "origin/$branch"

echo "Updating NPM packages"
npm ci

echo "Dropping old public folder"
rm -rf public

echo "Building the page"
npm run build

echo "Synchronizing files to web server"

if [ -n "$publishToStage" ]
then
	echo "Pushing to stage"
	time doPublishToStage
fi

if [ -n "$publishToProduction" ]
then
	echo "Publishing to production server"
	time doPublishToProduction
fi

echo "Deployment done"