name: Weekly Security Rebuild

# Note: This workflow filename has remained consistent. The related docker-publish.yml
# was replaced by docker-build.yml in commit f640524b (Dec 21, 2025).
# GitHub Advanced Security may show warnings about the old filename until its tracking updates.

on:
  schedule:
    - cron: '0 12 * * 2' # Tuesdays at 12:00 UTC
  workflow_dispatch:
    inputs:
      force_rebuild:
        description: 'Force rebuild without cache'
        required: false
        type: boolean
        default: true

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: false

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository_owner }}/charon

jobs:
  security-rebuild:
    name: Security Rebuild & Scan
    runs-on: ubuntu-latest
    timeout-minutes: 60
    permissions:
      contents: read
      packages: write
      security-events: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
        with:
          # Explicitly fetch the current HEAD of the ref at run time, not the
          # SHA that was frozen when this scheduled job was queued. Without this,
          # a queued job can run days later with stale code.
          ref: ${{ github.ref_name }}

      - name: Normalize image name
        run: |
          echo "IMAGE_NAME=$(echo "${{ env.IMAGE_NAME }}" | tr '[:upper:]' '[:lower:]')" >> "$GITHUB_ENV"

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

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

      - name: Resolve Debian base image digest
        id: base-image
        run: |
          docker pull debian:trixie-slim
          DIGEST=$(docker inspect --format='{{index .RepoDigests 0}}' debian:trixie-slim)
          echo "digest=$DIGEST" >> "$GITHUB_OUTPUT"
          echo "Base image digest: $DIGEST"

      - name: Log in to Container Registry
        uses: docker/login-action@b45d80f862d83dbcd57f89517bcf500b2ab88fb2 # v4.0.0
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@030e881283bb7a6894de51c315a6bfe6a94e05cf # v6.0.0
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=raw,value=security-scan-{{date 'YYYYMMDD'}}

      - name: Build Docker image (NO CACHE)
        id: build
        uses: docker/build-push-action@d08e5c354a6adb9ed34480a06d141179aa583294 # v7
        with:
          context: .
          platforms: linux/amd64
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          no-cache: ${{ github.event_name == 'schedule' || inputs.force_rebuild }}
          pull: true  # Always pull fresh base images to get latest security patches
          build-args: |
            VERSION=security-scan
            BUILD_DATE=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.created'] }}
            VCS_REF=${{ github.sha }}
            BASE_IMAGE=${{ steps.base-image.outputs.digest }}

      - name: Run Trivy vulnerability scanner (CRITICAL+HIGH)
        uses: aquasecurity/trivy-action@57a97c7e7821a5776cebc9bb87c984fa69cba8f1 # 0.35.0
        with:
          image-ref: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@${{ steps.build.outputs.digest }}
          format: 'table'
          severity: 'CRITICAL,HIGH'
          exit-code: '1' # Fail workflow if vulnerabilities found
          version: 'v0.69.3'
        continue-on-error: true

      - name: Run Trivy vulnerability scanner (SARIF)
        id: trivy-sarif
        uses: aquasecurity/trivy-action@57a97c7e7821a5776cebc9bb87c984fa69cba8f1 # 0.35.0
        with:
          image-ref: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@${{ steps.build.outputs.digest }}
          format: 'sarif'
          output: 'trivy-weekly-results.sarif'
          severity: 'CRITICAL,HIGH,MEDIUM'
          version: 'v0.69.3'

      - name: Upload Trivy results to GitHub Security
        uses: github/codeql-action/upload-sarif@38697555549f1db7851b81482ff19f1fa5c4fedc # v4.34.1
        with:
          sarif_file: 'trivy-weekly-results.sarif'

      - name: Run Trivy vulnerability scanner (JSON for artifact)
        uses: aquasecurity/trivy-action@57a97c7e7821a5776cebc9bb87c984fa69cba8f1 # 0.35.0
        with:
          image-ref: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@${{ steps.build.outputs.digest }}
          format: 'json'
          output: 'trivy-weekly-results.json'
          severity: 'CRITICAL,HIGH,MEDIUM,LOW'
          version: 'v0.69.3'

      - name: Upload Trivy JSON results
        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7
        with:
          name: trivy-weekly-scan-${{ github.run_number }}
          path: trivy-weekly-results.json
          retention-days: 90

      - name: Check Debian package versions
        run: |
          {
            echo "## 📦 Installed Package Versions"
            echo ""
            echo "Checking key security packages:"
            echo '```'
            docker run --rm --entrypoint "" "${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@${{ steps.build.outputs.digest }}" \
              sh -c "dpkg -l | grep -E 'libc-ares|curl|libcurl|openssl|libssl' || echo 'No matching packages found'"
            echo '```'
          } >> "$GITHUB_STEP_SUMMARY"

      - name: Create security scan summary
        if: always()
        run: |
          {
            echo "## 🔒 Weekly Security Rebuild Complete"
            echo ""
            echo "- **Build Date:** $(date -u +"%Y-%m-%d %H:%M:%S UTC")"
            echo "- **Image:** ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@${{ steps.build.outputs.digest }}"
            echo "- **Cache Used:** No (forced fresh build)"
            echo "- **Trivy Scan:** Completed (see Security tab for details)"
            echo ""
            echo "### Next Steps:"
            echo "1. Review Security tab for new vulnerabilities"
            echo "2. Check Trivy JSON artifact for detailed package info"
            echo "3. If critical CVEs found, trigger production rebuild"
          } >> "$GITHUB_STEP_SUMMARY"

      - name: Notify on security issues (optional)
        if: failure()
        run: |
          echo "::warning::Weekly security scan found HIGH or CRITICAL vulnerabilities. Review the Security tab."