#!/bin/bash
NAME=symphony-detector-endpoint
PACKAGE_URL="https://raw.githubusercontent.com/alces-software/${NAME}/master"
PACKAGE_ROOT="/opt/${NAME}"

create_systemd_unit() {
    local vpn_config vpn_id
    vpn_config="$1"
    vpn_id="$2"
    cat <<EOF > "/etc/systemd/system/${NAME}.service"
[Unit]
Description=Symphony Detector Endpoint service
Requires=openvpn@${vpn_config}.service
After=openvpn@${vpn_config}.service

[Service]
ExecStart=$PACKAGE_ROOT/bin/server.py ${vpn_id}
Type=forking
PIDFile=/var/run/${NAME}.pid
SysVStartPriority=99
TimeoutSec=0

[Install]
WantedBy=multi-user.target
EOF
}

case "$(hostname -s)" in
    router*)
        APPLIANCE="router"
        ;;
    symphony-director)
        APPLIANCE="director"
        ;;
    *)
        echo "Unable to determine appliance type from hostname."
        exit 1
        ;;
esac

mkdir -p "${PACKAGE_ROOT}/bin"
curl -o "${PACKAGE_ROOT}/bin/server.py" "${PACKAGE_URL}/bin/server.py"
chmod 0700 "${PACKAGE_ROOT}/bin/server.py"

if [ "$APPLIANCE" == "router" ]; then
  create_systemd_unit 'public' 'dmz'
else # if [ "$APPLIANCE" == "director" ]; then
  create_systemd_unit 'manage' 'mgt'
fi

chmod 644 "/etc/systemd/system/${NAME}.service"
systemctl daemon-reload
systemctl enable "${NAME}.service"