name: Docker Security Scan

on:
  push:
    branches: ["main"]
    paths:
      - "Dockerfile"
      - ".github/workflows/docker-security-scan.yml"
      - "mix.exs"
      - "mix.lock"
  pull_request:
    branches: ["main"]
    paths:
      - "Dockerfile"
      - ".github/workflows/docker-security-scan.yml"
      - "mix.exs"
      - "mix.lock"
  schedule:
    - cron: "0 0 * * 0" # Run weekly on Sundays at midnight
  workflow_dispatch: # Allow manual triggers

# Cancel in-progress runs when a new workflow with the same group is triggered
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  scan:
    name: Security Scan
    runs-on: ubuntu-latest
    permissions:
      contents: read
      security-events: write
      actions: read
      packages: read

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Build Docker image
        uses: docker/build-push-action@v5
        with:
          context: .
          tags: aprs:${{ github.sha }}
          load: true
          cache-from: type=gha
          cache-to: type=gha,mode=max

      - name: Run Trivy vulnerability scanner
        uses: aquasecurity/trivy-action@master
        with:
          image-ref: aprs:${{ github.sha }}
          format: "sarif"
          output: "trivy-results.sarif"
          severity: "CRITICAL,HIGH"
          timeout: "10m"
          scanners: "vuln,config,secret"

      - name: Upload Trivy scan results to GitHub Security tab
        uses: github/codeql-action/upload-sarif@v3
        if: always()
        with:
          sarif_file: "trivy-results.sarif"
          category: "Trivy Scan"

      - name: Run Trivy for outdated OS packages
        uses: aquasecurity/trivy-action@master
        with:
          image-ref: aprs:${{ github.sha }}
          format: "table"
          output: "os-packages.txt"
          severity: "HIGH,CRITICAL"
          vuln-type: "os"

      - name: Run Trivy for outdated application dependencies
        uses: aquasecurity/trivy-action@master
        with:
          image-ref: aprs:${{ github.sha }}
          format: "table"
          output: "app-packages.txt"
          severity: "HIGH,CRITICAL"
          vuln-type: "library"

      - name: Upload detailed vulnerability reports
        uses: actions/upload-artifact@v4
        if: always()
        with:
          name: vulnerability-reports
          path: |
            os-packages.txt
            app-packages.txt
          retention-days: 7

      - name: Run Docker Scout vulnerability scan
        uses: docker/scout-action@v1
        with:
          command: quickview,cves
          image: aprs:${{ github.sha }}
          output-format: sarif
          only-severities: critical,high
          sarif-file: scout-results.sarif

      - name: Upload Docker Scout results
        uses: actions/upload-artifact@v4
        if: always()
        with:
          name: docker-scout-report
          path: scout-results.sarif
          retention-days: 7

      - name: Generate security report summary
        if: always()
        run: |
          echo "# Docker Image Security Report" > security-summary.md
          echo "## Image: aprs:${{ github.sha }}" >> security-summary.md
          echo "## Date: $(date)" >> security-summary.md

          echo "### OS Package Vulnerabilities" >> security-summary.md
          echo '```' >> security-summary.md
          cat os-packages.txt >> security-summary.md || echo "No OS package vulnerabilities report available" >> security-summary.md
          echo '```' >> security-summary.md

          echo "### Application Dependencies Vulnerabilities" >> security-summary.md
          echo '```' >> security-summary.md
          cat app-packages.txt >> security-summary.md || echo "No application vulnerabilities report available" >> security-summary.md
          echo '```' >> security-summary.md

      - name: Upload security summary
        uses: actions/upload-artifact@v4
        if: always()
        with:
          name: security-summary
          path: security-summary.md
          retention-days: 14

      - name: Check for critical vulnerabilities
        run: |
          if grep -q "CRITICAL" trivy-results.sarif; then
            echo "Critical vulnerabilities found in the Docker image."
            echo "Please review the scan results in the Security tab."
            exit 1
          fi