#!/usr/bin/env bash
# Setup act_runner on the CI runner VPS (161.33.149.243).
#
# Prerequisites (run on CI runner VPS as ubuntu):
#   1. Get a runner registration token from Gitea:
#      http://161.33.139.73:3000 → Site Administration → Runners → "Create Runner"
#   2. Generate a deploy SSH key for accessing the web VPS:
#      ssh-keygen -t ed25519 -f /tmp/deploy_key -N ""
#      ssh-copy-id -i /tmp/deploy_key.pub ubuntu@161.33.139.73
#      Add /tmp/deploy_key (private) as Gitea secret: DEPLOY_SSH_KEY
#      rm /tmp/deploy_key
#
# Usage:
#   RUNNER_TOKEN=<token-from-gitea> bash setup-ci-runner.sh
#
set -euo pipefail

GITEA_URL="http://161.33.139.73:3000"
RUNNER_NAME="casan-ci-runner"
RUNNER_VERSION="v0.2.12"
INSTALL_DIR="/opt/act-runner"

if [[ -z "${RUNNER_TOKEN:-}" ]]; then
  echo "ERROR: RUNNER_TOKEN env var is required."
  echo "  Get it from: $GITEA_URL → Site Administration → Runners → Create Runner"
  exit 1
fi

echo "=== Installing act_runner $RUNNER_VERSION ==="
sudo mkdir -p "$INSTALL_DIR"
sudo curl -fsSL \
  "https://gitea.com/gitea/act_runner/releases/download/${RUNNER_VERSION}/act_runner-${RUNNER_VERSION}-linux-amd64" \
  -o "$INSTALL_DIR/act_runner"
sudo chmod +x "$INSTALL_DIR/act_runner"

echo "=== Writing runner config ==="
sudo tee "$INSTALL_DIR/config.yaml" > /dev/null <<'CONFIG'
log:
  level: info

runner:
  name: "casan-ci-runner"
  capacity: 1
  labels:
    - "ci-runner:docker://catthehacker/ubuntu:act-22.04"
  fetch_interval: 5s
  fetch_timeout: 60s

container:
  # host network so the job container can reach Gitea at 161.33.139.73:3000
  network: host
  # 2 GB RAM available on CI runner — builds need up to 1.5 GB
  options: "--memory 1536m --cpus 1.5"
  valid_volumes:
    - "**"
CONFIG

echo "=== Registering runner with Gitea ==="
cd "$INSTALL_DIR"
sudo ./act_runner register \
  --instance "$GITEA_URL" \
  --token "$RUNNER_TOKEN" \
  --name "$RUNNER_NAME" \
  --no-interactive

echo "=== Installing systemd service ==="
sudo tee /etc/systemd/system/act-runner.service > /dev/null <<'SERVICE'
[Unit]
Description=Gitea act_runner (CI builds)
After=docker.service
Requires=docker.service

[Service]
User=ubuntu
Group=docker
WorkingDirectory=/opt/act-runner
ExecStart=/opt/act-runner/act_runner daemon --config /opt/act-runner/config.yaml
Restart=always
RestartSec=5

[Install]
WantedBy=multi-user.target
SERVICE

sudo systemctl daemon-reload
sudo systemctl enable act-runner
sudo systemctl start act-runner

echo ""
echo "=== CI runner setup complete ==="
echo "Check status: sudo systemctl status act-runner"
echo "View logs:    sudo journalctl -u act-runner -f"
echo "Verify in Gitea: $GITEA_URL/-/admin/runners"