#!/bin/bash

set -e

VERSION=$(curl -s https://git.savin.bio/api/v1/repos/savinmax/websocket-relay/releases | python3 -c 'import json,sys;print(json.load(sys.stdin)[0]["tag_name"])' | sed 's/v//')
OS=$(uname -s | tr '[:upper:]' '[:lower:]')
ARCH=$(uname -m | sed 's/x86_/amd/')

[ $UID -ne 0 ] && 2>&1 echo "Run as root please, we are going to install stuff" && exit 1

trap "rm -rf websocket-relay*" EXIT

pushd /tmp
filename="websocket-relay-${OS}-${ARCH}"
echo "Downloading version ${filename}"
curl -sL -o ./websocket-relay https://git.savin.bio/savinmax/websocket-relay/releases/download/v${VERSION}/$filename
chmod +x ./websocket-relay
mv websocket-relay /usr/sbin/websocket-relay
cat <<EOF >/etc/websocket-relay.yaml
server:
  port: 8888
  tls:
    enabled: false
    cert_file: cert.pem
    key_file: key.pem

metrics:
  enabled: true
  port: 9090
EOF

cat <<EOF >/etc/systemd/system/websocket-relay.service
[Unit]
Description=websocket-relay
Wants=network-online.target
After=network-online.target

[Service]
User=websocket-relay
Group=websocket-relay
Type=simple
ExecStart=/usr/sbin/websocket-relay --config-file=/etc/websocket-relay.yaml

[Install]
WantedBy=multi-user.target
EOF

useradd -r websocket-relay
chown -R websocket-relay:websocket-relay /etc/websocket-relay.yaml

systemctl enable websocket-relay.service
systemctl start websocket-relay.service

popd