name: Build Docker images (PR test)

# Reusable workflow called from build.yml on PRs to verify the three
# embedded Dockerfiles (default, ultra-lite, fat) still build cleanly,
# optionally against a freshly-built base image when the PR touches the
# base Dockerfile.
on:
  workflow_call:
    inputs:
      docker-base-changed:
        description: "Whether the docker base image changed (forwarded from files-changed)."
        required: false
        type: string
        default: "false"
      dockerfiles-changed:
        description: "Whether any Dockerfile changed (forwarded from files-changed). Gates the slow arm64 build leg."
        required: false
        type: string
        default: "false"

permissions:
  contents: read

jobs:
  # TODO: extract a pre-matrix `prepare` job that runs once and produces
  # shared artifacts for the three matrix entries below to consume:
  #   1. `task backend:build` — currently runs 3× in parallel with
  #      identical env (DISABLE_ADDITIONAL_FEATURES=true,
  #      STIRLING_PDF_DESKTOP_UI=false). Build once, upload the JAR as an
  #      artifact, matrix entries download.
  #   2. The base-image `docker build` (gated on docker-base-changed) —
  #      currently runs 3× in parallel against the same Dockerfile and
  #      context. Build once, `docker save` to an artifact, matrix entries
  #      `docker load` before the embedded build.
  # Saves ~2 full backend builds + 2 base-image builds per PR that touches
  # docker. May also be reusable from backend-build.yml's jdk-25 +
  # spring-security=true matrix entry if `task backend:build` and
  # `task backend:build:ci` produce equivalent JARs (verify before wiring).
  test-build-docker-images:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        include:
          - docker-rev: docker/embedded/Dockerfile
            artifact-suffix: Dockerfile
            cache-scope: stirling-pdf-latest
          - docker-rev: docker/embedded/Dockerfile.ultra-lite
            artifact-suffix: Dockerfile.ultra-lite
            cache-scope: stirling-pdf-ultra-lite
          - docker-rev: docker/embedded/Dockerfile.fat
            artifact-suffix: Dockerfile.fat
            cache-scope: stirling-pdf-fat
    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@ab7a9404c0f3da075243ca237b5fac12c98deaa5 # v2.19.3
        with:
          egress-policy: audit

      - name: Checkout Repository
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

      - name: Login to GitHub Container Registry
        uses: docker/login-action@4907a6ddec9925e35a0a9e82d7399ccc52663121 # v4.1.0
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ github.token }}

      - name: Convert repository owner to lowercase
        id: repoowner
        run: echo "lowercase=$(echo ${{ github.repository_owner }} | awk '{print tolower($0)}')" >> $GITHUB_OUTPUT

      - name: Free disk space on runner
        run: |
          echo "Disk space before cleanup:" && df -h
          sudo rm -rf /usr/share/dotnet /opt/ghc /usr/local/lib/android /usr/local/share/boost
          docker system prune -af || true
          echo "Disk space after cleanup:" && df -h

      - name: Set up JDK 25
        uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5.2.0
        with:
          java-version: "25"
          distribution: "temurin"

      - name: Cache Gradle dependency artifacts
        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
        with:
          path: |
            ~/.gradle/wrapper
            ~/.gradle/caches/modules-2/files-2.1
            ~/.gradle/caches/modules-2/metadata-2.*
          key: gradle-deps-${{ runner.os }}-jdk-25-${{ hashFiles('**/gradle/wrapper/gradle-wrapper.properties', '**/*.gradle', '**/*.gradle.kts', 'settings.gradle', 'settings.gradle.kts', 'gradle/libs.versions.toml') }}

      - name: Setup Gradle
        uses: gradle/actions/setup-gradle@3f131e8634966bd73d06cc69884922b02e6faf92 # v6.2.0
        with:
          gradle-version: 9.6.1
          cache-disabled: true

      - name: Install Task
        uses: go-task/setup-task@01a4adf9db2d14c1de7a560f09170b6e0df736aa # v2.1.0
      - name: Build application
        run: task backend:build
        env:
          MAVEN_USER: ${{ secrets.MAVEN_USER }}
          MAVEN_PASSWORD: ${{ secrets.MAVEN_PASSWORD }}
          MAVEN_PUBLIC_URL: ${{ secrets.MAVEN_PUBLIC_URL }}
          DISABLE_ADDITIONAL_FEATURES: true
          STIRLING_PDF_DESKTOP_UI: false

      - name: Set up QEMU
        uses: docker/setup-qemu-action@ce360397dd3f832beb865e1373c09c0e9f86d70a # v4.0.0

      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd # v4.0.0

      - name: Build base image locally (PR base change only)
        if: github.event_name == 'pull_request' && inputs.docker-base-changed == 'true'
        run: |
          docker build -t stirling-pdf-base:pr-test -f docker/base/Dockerfile docker/base

      - name: Set base image and platform for this build
        id: build-params
        # Pass workflow inputs through env vars rather than expanding `${{ }}`
        # directly into the shell — defense-in-depth against template injection
        # if any upstream provider of these values ever becomes less trusted.
        # GITHUB_EVENT_NAME is already provided by the runner.
        env:
          DOCKER_BASE_CHANGED: ${{ inputs.docker-base-changed }}
          DOCKERFILES_CHANGED: ${{ inputs.dockerfiles-changed }}
        run: |
          if [ "$GITHUB_EVENT_NAME" = "pull_request" ] && [ "$DOCKER_BASE_CHANGED" = "true" ]; then
            # Base Dockerfile changed: build against the locally-built base,
            # which only exists for amd64.
            echo "base_image=stirling-pdf-base:pr-test" >> "$GITHUB_OUTPUT"
            echo "platforms=linux/amd64" >> "$GITHUB_OUTPUT"
          elif [ "$DOCKERFILES_CHANGED" = "true" ]; then
            # A Dockerfile changed: also verify the arm64 build (slow QEMU leg).
            echo "base_image=stirlingtools/stirling-pdf-base:latest" >> "$GITHUB_OUTPUT"
            echo "platforms=linux/amd64,linux/arm64/v8" >> "$GITHUB_OUTPUT"
          else
            # No Dockerfile change: amd64 only. arm64 is exercised on the base
            # image publish and on release, not on every code PR.
            echo "base_image=stirlingtools/stirling-pdf-base:latest" >> "$GITHUB_OUTPUT"
            echo "platforms=linux/amd64" >> "$GITHUB_OUTPUT"
          fi

      # Base-changed PRs build the embedded image with the local docker driver
      # so the locally-built stirling-pdf-base:pr-test (in the daemon image
      # store) resolves. A buildx container builder cannot see it and would try
      # to pull it from a registry, which fails. Single-platform, no gha cache.
      - name: Build ${{ matrix.docker-rev }} against local base (PR base change)
        if: github.event_name == 'pull_request' && inputs.docker-base-changed == 'true'
        run: |
          DOCKER_BUILDKIT=1 docker build \
            --build-arg BASE_IMAGE=${{ steps.build-params.outputs.base_image }} \
            --file ./${{ matrix.docker-rev }} \
            --tag stirling-pdf-embedded:pr-test \
            .

      # PRs that did NOT change the base use the buildx container builder
      # (multi-platform + gha cache) against the published base image.
      - name: Build ${{ matrix.docker-rev }}
        if: inputs.docker-base-changed != 'true'
        uses: docker/build-push-action@53b7df96c91f9c12dcc8a07bcb9ccacbed38856a # v7.3.0
        with:
          builder: ${{ steps.buildx.outputs.name }}
          context: .
          file: ./${{ matrix.docker-rev }}
          push: false
          cache-from: type=gha,scope=${{ matrix.cache-scope }}
          cache-to: type=gha,mode=max,scope=${{ matrix.cache-scope }}
          platforms: ${{ steps.build-params.outputs.platforms }}
          build-args: |
            BASE_IMAGE=${{ steps.build-params.outputs.base_image }}
          provenance: true
          sbom: true

      - name: Upload Reports
        if: always()
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        with:
          name: reports-docker-${{ matrix.artifact-suffix }}
          path: |
            build/reports/tests/
            build/test-results/
            build/reports/problems/
          retention-days: 3
          if-no-files-found: warn

  test-build-unoserver-image:
    runs-on: ubuntu-latest
    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@ab7a9404c0f3da075243ca237b5fac12c98deaa5 # v2.19.3
        with:
          egress-policy: audit

      - name: Checkout Repository
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

      - name: Set up QEMU
        uses: docker/setup-qemu-action@ce360397dd3f832beb865e1373c09c0e9f86d70a # v4.0.0

      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd # v4.0.0

      - name: Build docker/unoserver/Dockerfile
        uses: docker/build-push-action@53b7df96c91f9c12dcc8a07bcb9ccacbed38856a # v7.3.0
        with:
          builder: ${{ steps.buildx.outputs.name }}
          context: .
          file: ./docker/unoserver/Dockerfile
          push: false
          load: true
          cache-from: type=gha,scope=stirling-unoserver
          cache-to: type=gha,mode=max,scope=stirling-unoserver
          platforms: linux/amd64
          tags: stirling-unoserver:pr-test
          provenance: false
          sbom: false

      - name: Smoke test the built image
        run: |
          set -eu
          docker run -d --name unoserver-smoke \
            -e UNOSERVER_RECYCLE_INTERVAL_SECONDS=0 \
            stirling-unoserver:pr-test
          deadline=$((SECONDS + 60))
          while [ $SECONDS -lt $deadline ]; do
            status=$(docker inspect -f '{{.State.Health.Status}}' unoserver-smoke 2>/dev/null || echo "starting")
            if [ "$status" = "healthy" ]; then
              echo "unoserver became healthy"
              docker logs unoserver-smoke | tail -30
              docker rm -f unoserver-smoke
              exit 0
            fi
            sleep 3
          done
          echo "unoserver did not become healthy in time"
          docker logs unoserver-smoke || true
          docker rm -f unoserver-smoke || true
          exit 1