name: Build and Push

# Off-infra build (ADR-0002). Canonical repo is Forgejo viktor/{{NAME}}, which
# push-mirrors here; this workflow builds on GitHub-hosted runners, pushes the
# image to GHCR, then signals the Woodpecker deploy pipeline (repo {{WP_REPO_ID}})
# to roll the cluster — the homelab never sees build IO or registry pushes.
#
# Committed on the FORGEJO side (the mirror is one-way; commits made on GitHub
# are overwritten by the next sync). Generated by infra/scripts/offinfra-onboard.
on:
  push:
    branches: [master]
  workflow_dispatch: {}

permissions:
  contents: read
  packages: write

jobs:
  lint-and-test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6
{{TEST_STEPS}}

  build:
    needs: lint-and-test
    runs-on: ubuntu-latest
    outputs:
      image_tag: ${{ steps.meta.outputs.sha }}
    steps:
      - uses: actions/checkout@v6
        with:
          fetch-depth: 0      # full history + tags so svu sees the last vX.Y.Z
          fetch-tags: true
      # Auto-semver (svu): tag-only, pushed to CANONICAL Forgejo (GitHub tags
      # would be wiped by the next mirror sync). Best-effort: never blocks the build.
      - name: Compute + tag semver (svu)
        env:
          FORGEJO_GIT_TOKEN: ${{ secrets.FORGEJO_GIT_TOKEN }}
        run: |
          set +e
          git config user.email "ci@viktorbarzin.me"
          git config user.name "{{NAME}}-ci"
          git config --global --add safe.directory "$GITHUB_WORKSPACE"
          curl -sSL https://github.com/caarlos0/svu/releases/download/v3.4.1/svu_3.4.1_linux_amd64.tar.gz | tar -xz svu
          CUR=$(./svu current 2>/dev/null)
          NEXT=$(./svu next 2>/dev/null)
          echo "svu current=[$CUR] next=[$NEXT]"
          if [ -n "$NEXT" ] && [ "$NEXT" != "$CUR" ]; then
            git tag "$NEXT" 2>/dev/null
            git push "https://viktor:${FORGEJO_GIT_TOKEN}@forgejo.viktorbarzin.me/viktor/{{NAME}}.git" "$NEXT" && echo "pushed tag $NEXT to forgejo" || echo "tag push failed (non-blocking)"
          fi
          exit 0
      - uses: docker/setup-buildx-action@v4
      - uses: docker/login-action@v4
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - id: meta
        run: echo "sha=$(echo ${{ github.sha }} | cut -c1-8)" >> "$GITHUB_OUTPUT"
      - uses: docker/build-push-action@v7
        with:
          context: {{CONTEXT}}
          push: true
          platforms: linux/amd64
          # Single-manifest images (no provenance/SBOM attestation children) so
          # registry retention can never orphan index children (ADR-0002).
          provenance: false
          tags: |
            ghcr.io/viktorbarzin/{{IMAGE}}:${{ steps.meta.outputs.sha }}
            ghcr.io/viktorbarzin/{{IMAGE}}:latest
          cache-from: type=gha
          cache-to: type=gha,mode=max
      # Keep the newest ~10 versions on ghcr (latest rides the newest one).
      - name: ghcr retention (keep 10)
        uses: actions/delete-package-versions@v5
        continue-on-error: true
        with:
          package-name: {{IMAGE}}
          package-type: container
          min-versions-to-keep: 10

  deploy:
    needs: build
    runs-on: ubuntu-latest
    steps:
      # Signal Woodpecker (repo {{WP_REPO_ID}} = ViktorBarzin/{{NAME}} mirror) to run
      # .woodpecker/deploy.yml — kubectl set image in-cluster (agent SA is cluster-admin).
      - name: Trigger Woodpecker deploy
        run: |
          for attempt in 1 2 3; do
            STATUS=$(curl -s -o /dev/null -w "%{http_code}" -X POST \
              "https://ci.viktorbarzin.me/api/repos/{{WP_REPO_ID}}/pipelines" \
              -H "Authorization: Bearer ${{ secrets.WOODPECKER_TOKEN }}" \
              -H "Content-Type: application/json" \
              -d "{\"branch\":\"master\",\"variables\":{\"IMAGE_TAG\":\"${{ needs.build.outputs.image_tag }}\",\"IMAGE_NAME\":\"ghcr.io/viktorbarzin/{{IMAGE}}\"}}")
            if [ "$STATUS" -ge 200 ] && [ "$STATUS" -lt 300 ]; then
              echo "Woodpecker deploy triggered (HTTP $STATUS)"; exit 0
            fi
            echo "Attempt $attempt failed (HTTP $STATUS), retrying in 30s..."; sleep 30
          done
          echo "Failed to trigger Woodpecker deploy after 3 attempts"; exit 1

  notify-failure:
    needs: [lint-and-test, build, deploy]
    if: failure()
    runs-on: ubuntu-latest
    steps:
      - name: Slack notify
        run: |
          curl -sf -X POST -H 'Content-Type: application/json' \
            -d "{\"text\":\":rotating_light: {{NAME}} off-infra build FAILED: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}\"}" \
            "${{ secrets.SLACK_WEBHOOK }}" || true