name: CD BRouter

on:
  push:
    branches: [main]
    paths:
      - "docker/brouter/**"
      - "infrastructure/brouter-host/**"
  workflow_dispatch: {}

concurrency:
  group: deploy-brouter
  cancel-in-progress: true

jobs:
  build:
    name: Build & Push BRouter Image
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    steps:
      - uses: actions/checkout@v6

      - uses: docker/login-action@v4
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - uses: docker/build-push-action@v7
        with:
          context: docker/brouter
          push: true
          tags: |
            ghcr.io/trails-cool/brouter:latest
            ghcr.io/trails-cool/brouter:${{ github.sha }}

  deploy:
    name: Deploy BRouter to dedicated host
    needs: [build]
    runs-on: ubuntu-latest
    environment: infra
    steps:
      - uses: actions/checkout@v6

      - name: Decrypt shared secret
        run: |
          curl -sLO https://github.com/getsops/sops/releases/download/v3.9.4/sops-v3.9.4.linux.amd64
          chmod +x sops-v3.9.4.linux.amd64
          # Extract ONLY BROUTER_AUTH_TOKEN from secrets.app.env — the
          # rest of that file is app-only and has no business reaching
          # the BRouter host.
          SOPS_AGE_KEY="${{ secrets.AGE_SECRET_KEY }}" ./sops-v3.9.4.linux.amd64 -d infrastructure/secrets.app.env \
            | grep '^BROUTER_AUTH_TOKEN=' > infrastructure/brouter-host/.env
          chmod 0600 infrastructure/brouter-host/.env

      - name: Copy compose project to dedicated host
        uses: appleboy/scp-action@v1
        with:
          host: ${{ secrets.BROUTER_DEPLOY_HOST }}
          username: trails
          port: ${{ secrets.BROUTER_DEPLOY_SSH_PORT }}
          key: ${{ secrets.BROUTER_DEPLOY_SSH_KEY }}
          source: "infrastructure/brouter-host/docker-compose.yml,infrastructure/brouter-host/Caddyfile,infrastructure/brouter-host/download-segments.sh,infrastructure/brouter-host/.env"
          target: /home/trails/brouter
          strip_components: 2

      - name: Pull image and restart containers
        uses: appleboy/ssh-action@v1
        with:
          host: ${{ secrets.BROUTER_DEPLOY_HOST }}
          username: trails
          port: ${{ secrets.BROUTER_DEPLOY_SSH_PORT }}
          key: ${{ secrets.BROUTER_DEPLOY_SSH_KEY }}
          script: |
            set -euo pipefail
            cd /home/trails/brouter

            chmod +x download-segments.sh

            # Segment download is explicitly NOT run here — it's
            # multi-hour and idempotent. Seeding the segments directory
            # is a one-shot operator task (see brouter-host/README.md).
            # Run `~/brouter/download-segments.sh` by hand (or via cron)
            # to refresh.
            if [ ! -d segments ] || [ -z "$(ls -A segments 2>/dev/null)" ]; then
              echo "WARNING: segments/ is empty. BRouter will start but return 404 until segments are seeded."
              mkdir -p segments
            fi

            docker compose pull
            docker compose up -d --remove-orphans
            docker compose ps

      - name: Annotate deploy in flagship Grafana
        uses: appleboy/ssh-action@v1
        with:
          host: ${{ secrets.DEPLOY_HOST }}
          username: root
          key: ${{ secrets.DEPLOY_SSH_KEY }}
          script: |
            cd /opt/trails-cool
            GRAFANA_TOKEN=$(grep GRAFANA_SERVICE_TOKEN .env | cut -d= -f2-)
            if [ -n "$GRAFANA_TOKEN" ]; then
              docker compose exec -T grafana curl -sf -X POST \
                -H "Authorization: Bearer $GRAFANA_TOKEN" \
                -H "Content-Type: application/json" \
                -d '{"text":"Deploy brouter ${{ github.sha }}","tags":["deploy","brouter"]}' \
                http://localhost:3000/api/annotations || true
            fi