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 2 * * 0' # Sundays at 02:00 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@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6

      - 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@c7c53464625b32c7a7e944ae62b3e17d2b600130 # v3.7.0

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3.12.0

      - name: Resolve Caddy base digest
        id: caddy
        run: |
          docker pull caddy:2-alpine
          DIGEST=$(docker inspect --format='{{index .RepoDigests 0}}' caddy:2-alpine)
          echo "image=$DIGEST" >> $GITHUB_OUTPUT

      - name: Log in to Container Registry
        uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3.6.0
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@c299e40c65443455700f0fdfc63efafe5b349051 # v5.10.0
        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@263435318d21b8e681c14492fe198d362a7d2c83 # v6
        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=${{ github.sha }}
            CADDY_IMAGE=${{ steps.caddy.outputs.image }}

      - name: Run Trivy vulnerability scanner (CRITICAL+HIGH)
        uses: aquasecurity/trivy-action@b6643a29fecd7f34b3597bc6acb0a98b03d33ff8 # 0.33.1
        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
        continue-on-error: true

      - name: Run Trivy vulnerability scanner (SARIF)
        id: trivy-sarif
        uses: aquasecurity/trivy-action@b6643a29fecd7f34b3597bc6acb0a98b03d33ff8 # 0.33.1
        with:
          image-ref: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@${{ steps.build.outputs.digest }}
          format: 'sarif'
          output: 'trivy-weekly-results.sarif'
          severity: 'CRITICAL,HIGH,MEDIUM'

      - name: Upload Trivy results to GitHub Security
        uses: github/codeql-action/upload-sarif@cdefb33c0f6224e58673d9004f47f7cb3e328b89 # v4.31.10
        with:
          sarif_file: 'trivy-weekly-results.sarif'

      - name: Run Trivy vulnerability scanner (JSON for artifact)
        uses: aquasecurity/trivy-action@b6643a29fecd7f34b3597bc6acb0a98b03d33ff8 # 0.33.1
        with:
          image-ref: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@${{ steps.build.outputs.digest }}
          format: 'json'
          output: 'trivy-weekly-results.json'
          severity: 'CRITICAL,HIGH,MEDIUM,LOW'

      - name: Upload Trivy JSON results
        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6
        with:
          name: trivy-weekly-scan-${{ github.run_number }}
          path: trivy-weekly-results.json
          retention-days: 90

      - name: Check Alpine package versions
        run: |
          echo "## 📦 Installed Package Versions" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "Checking key security packages:" >> $GITHUB_STEP_SUMMARY
          echo '```' >> $GITHUB_STEP_SUMMARY
          docker run --rm --entrypoint "" ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@${{ steps.build.outputs.digest }} \
            sh -c "apk update >/dev/null 2>&1 && apk info c-ares curl libcurl openssl" >> $GITHUB_STEP_SUMMARY
          echo '```' >> $GITHUB_STEP_SUMMARY

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