name: Build & Push Images

# Builds the frontend + backend Docker images and pushes them to the Forgejo
# container registry (registry.snsnetlabs.com/sam/...). Runs on every push to
# main, and on-demand via the "Run workflow" button (workflow_dispatch).
#
# NOTE: registry.snsnetlabs.com is the unproxied (DNS-only) registry host so
# large layers bypass Cloudflare's body cap. The web UI / packages list stays
# on forgejo.snsnetlabs.com (Cloudflare Access SSO).
#
# Requirements (see deploy/README.md):
#   - Forgejo Actions secret FORGEJO_REGISTRY_TOKEN: a package-scoped token for
#     user `sam`.
#   - The runner must allow Docker builds: container.docker_host = "automount"
#     in the forgejo-runner config (mounts /var/run/docker.sock into the job).

on:
  push:
    branches: [main]
  workflow_dispatch:

env:
  REGISTRY: registry.snsnetlabs.com
  OWNER: sam

jobs:
  build:
    runs-on: docker
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Install Docker CLI
        # Debian bookworm's docker.io is too old (API 1.41) for the host daemon
        # (needs >= 1.44), so install the current docker-ce-cli from Docker's repo.
        run: |
          apt-get update
          apt-get install -y --no-install-recommends ca-certificates curl
          install -m 0755 -d /etc/apt/keyrings
          curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc
          chmod a+r /etc/apt/keyrings/docker.asc
          echo "deb [arch=amd64 signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian bookworm stable" > /etc/apt/sources.list.d/docker.list
          apt-get update
          apt-get install -y --no-install-recommends docker-ce-cli
          docker version

      - name: Log in to Forgejo registry
        run: |
          echo "${{ secrets.FORGEJO_REGISTRY_TOKEN }}" \
            | docker login "$REGISTRY" -u "$OWNER" --password-stdin

      - name: Build & push frontend image
        run: |
          docker build \
            -t "$REGISTRY/$OWNER/archnest:${{ github.sha }}" \
            -t "$REGISTRY/$OWNER/archnest:latest" \
            -f Dockerfile .
          docker push "$REGISTRY/$OWNER/archnest:${{ github.sha }}"
          docker push "$REGISTRY/$OWNER/archnest:latest"

      - name: Build & push backend image
        run: |
          docker build \
            -t "$REGISTRY/$OWNER/archnest-backend:${{ github.sha }}" \
            -t "$REGISTRY/$OWNER/archnest-backend:latest" \
            -f backend/Dockerfile backend
          docker push "$REGISTRY/$OWNER/archnest-backend:${{ github.sha }}"
          docker push "$REGISTRY/$OWNER/archnest-backend:latest"

      - name: Log out
        if: always()
        run: docker logout "$REGISTRY"

  deploy:
    # Auto-deploy to racknerd2 after a successful build. Deploys the exact
    # images just built (pinned to this commit's SHA). For manual/on-demand
    # deploys of an arbitrary tag (e.g. rollback), use the separate
    # "Deploy to racknerd2" workflow (deploy.yml).
    needs: build
    runs-on: docker
    env:
      DEPLOY_HOST: 100.96.217.250
      DEPLOY_DIR: /opt/archnest
    steps:
      - name: Install SSH client
        run: |
          apt-get update
          apt-get install -y --no-install-recommends openssh-client

      - name: Write deploy key
        run: |
          install -m 700 -d ~/.ssh
          printf '%s\n' "${{ secrets.RACKNERD2_SSH_KEY }}" > ~/.ssh/id_deploy
          chmod 600 ~/.ssh/id_deploy

      - name: Pull this build's images and restart stack
        run: |
          ssh -i ~/.ssh/id_deploy -o StrictHostKeyChecking=accept-new \
            root@"$DEPLOY_HOST" \
            "cd $DEPLOY_DIR && ARCHNEST_TAG='${{ github.sha }}' docker compose pull && ARCHNEST_TAG='${{ github.sha }}' docker compose up -d --remove-orphans"

      - name: Health check (backend /api/health via mesh)
        run: |
          ssh -i ~/.ssh/id_deploy -o StrictHostKeyChecking=accept-new \
            root@"$DEPLOY_HOST" \
            "for i in \$(seq 1 30); do curl -fsS http://$DEPLOY_HOST:8080/api/health && echo OK && exit 0; sleep 2; done; echo 'health check failed'; cd $DEPLOY_DIR && docker compose logs --tail=50; exit 1"