#!/usr/bin/env bash
has_param() {
	local term="$1"
	shift
	for arg; do
		if [ "$arg" = "$1" ]; then
			return 0
		fi
	done
	return 1
}

if ! has_param "-f" "$@"; then
	set -e
fi

INSTALL_HOME="$(realpath "$BASH_SOURCE")"
INSTALL_HOME="$(dirname "$INSTALL_HOME")"
INSTALL_APPNAME="svchelper"
INSTALL_SERVICE="$INSTALL_APPNAME"
INSTALL_SERVICE_PATH="/etc/init.d/$INSTALL_SERVICE"
INSTALL_INPUT="$INSTALL_HOME/app"
INSTALL_OUTPUT="/opt/$INSTALL_APPNAME"
INSTALL_BIN="/usr/local/bin/$INSTALL_APPNAME"

echo "Uninstalling '$INSTALL_APPNAME' ..."
if [ -e "$INSTALL_SERVICE_PATH" ]; then
	service "$INSTALL_SERVICE" stop
	update-rc.d "$INSTALL_SERVICE" remove
	rm "$INSTALL_SERVICE_PATH"
fi
if [ -e "$INSTALL_BIN" ]; then
	rm "$INSTALL_BIN"
fi
if [ -e "$INSTALL_OUTPUT" ]; then
	rm -rf "$INSTALL_OUTPUT"
fi

if has_param "-u" "$@"; then
	exit 0
fi

echo "Installing '$INSTALL_APPNAME' ..."
cp -r "$INSTALL_INPUT" "$INSTALL_OUTPUT"
ln -s "$INSTALL_OUTPUT/app" "$INSTALL_BIN"

echo '#!/bin/bash'                              >"$INSTALL_SERVICE_PATH"
echo '### BEGIN INIT INFO'                     >>"$INSTALL_SERVICE_PATH"
echo '# Provides:          '"$INSTALL_SERVICE" >>"$INSTALL_SERVICE_PATH"
echo '# Required-Start:    $all'               >>"$INSTALL_SERVICE_PATH"
echo '# Required-Stop:     $all'               >>"$INSTALL_SERVICE_PATH"
echo '# Default-Start:     2 3 4 5'            >>"$INSTALL_SERVICE_PATH"
echo '# Default-Stop:      0 6'                >>"$INSTALL_SERVICE_PATH"
echo '# Short-Description: Service helper'     >>"$INSTALL_SERVICE_PATH"
echo '### END INIT INFO'                       >>"$INSTALL_SERVICE_PATH"
echo ''                                        >>"$INSTALL_SERVICE_PATH"
echo "exec bash \"$INSTALL_BIN\" init \"\$1\""  >>"$INSTALL_SERVICE_PATH"
chmod +x "$INSTALL_SERVICE_PATH"
update-rc.d "$INSTALL_SERVICE" defaults

source "$INSTALL_BIN" source
mkdir -p "$APP_SERVICES"
set +e
"$APP" list | while read -r SERVICE; do
	"$APP" install "$SERVICE"
done
service "$INSTALL_SERVICE" start
exit 0