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name: CI

on:
  push:
    branches: [main]
  pull_request:

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: ${{ github.event_name == 'pull_request' }}

permissions: {}

jobs:
  test:
    runs-on: ubuntu-latest
    permissions:
      contents: read # checkout.
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
        with:
          persist-credentials: false

      - uses: ruby/setup-ruby@e65c17d16e57e481586a6a5a0282698790062f92 # v1
        with:
          bundler-cache: true

      # Seed photos download from Wikimedia Commons on first use; cache them so
      # the suite only hits the network when the photo set in lib/seeds.rb
      # changes. Keyed without restore-keys on purpose: cache files are named by
      # photo key, so a changed URL must miss and re-download rather than reuse
      # a stale image.
      - uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
        with:
          path: ~/.cache/domus/seeds
          key: domus-seeds-${{ hashFiles('lib/seeds.rb') }}

      - run: bundle exec rake test

      - run: bundle exec rake check

  build:
    name: Build
    needs: test
    if: github.ref == 'refs/heads/main' && github.event_name == 'push'
    runs-on: ubuntu-latest
    permissions:
      contents: read  # checkout
      packages: write # push container image to GHCR
    outputs:
      image: ghcr.io/${{ github.repository }}:${{ steps.meta.outputs.version }}
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
        with:
          persist-credentials: false
      - uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3
      - uses: docker/login-action@c94ce9fb468520275223c153574b00df6fe4bcc9 # v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - id: short-sha
        run: echo "sha=${GITHUB_SHA::7}" >> "$GITHUB_OUTPUT"
      - uses: docker/metadata-action@c299e40c65443455700f0fdfc63efafe5b349051 # v5
        id: meta
        with:
          images: ghcr.io/${{ github.repository }}
          tags: |
            type=raw,value={{date 'YYYYMMDD'}}-${{ steps.short-sha.outputs.sha }}
      - uses: docker/build-push-action@10e90e3645eae34f1e60eeb005ba3a3d33f178e8 # v6
        with:
          context: .
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max

  deploy:
    name: Deploy to Fly.io
    needs: build
    if: github.ref == 'refs/heads/main' && github.event_name == 'push'
    runs-on: ubuntu-latest
    permissions:
      contents: read # checkout
    environment: demo
    concurrency:
      group: fly-deploy
      cancel-in-progress: true
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
        with:
          persist-credentials: false
      - uses: superfly/flyctl-actions/setup-flyctl@63da3ecc5e2793b98a3f2519b3d75d4f4c11cec2 # master
      - run: flyctl deploy --image "$NEEDS_BUILD_OUTPUTS_IMAGE"
        env:
          FLY_API_TOKEN: ${{ secrets.FLY_API_TOKEN }}
          NEEDS_BUILD_OUTPUTS_IMAGE: ${{ needs.build.outputs.image }}