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

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      - name: Check for outdated base images
        uses: aquasecurity/trivy-action@master
        with:
          image-ref: aprs:${{ github.sha }}
          format: "table"
          output: "outdated-dependencies.txt"
          exit-code: "0" # Don't fail the build yet
          severity: "UNKNOWN,LOW,MEDIUM,HIGH,CRITICAL"
          scanners: "vuln"
          vuln-type: "os"

      - name: Check for outdated application dependencies
        uses: aquasecurity/trivy-action@master
        with:
          image-ref: aprs:${{ github.sha }}
          format: "table"
          output: "outdated-app-dependencies.txt"
          exit-code: "0" # Don't fail the build yet
          severity: "UNKNOWN,LOW,MEDIUM,HIGH,CRITICAL"
          scanners: "vuln"
          vuln-type: "library"

      - name: Upload outdated dependencies report
        uses: actions/upload-artifact@v3
        if: always()
        with:
          name: dependency-reports
          path: |
            outdated-dependencies.txt
            outdated-app-dependencies.txt
          retention-days: 7

      - name: Check for update availability in base image
        run: |
          # Extract base image from Dockerfile
          BASE_IMAGE=$(grep 'RUNNER_IMAGE=' Dockerfile | cut -d'"' -f2)
          echo "Base image: $BASE_IMAGE"

          # Pull latest version of the base image
          docker pull $BASE_IMAGE

          # Compare the digests
          CURRENT_DIGEST=$(docker inspect --format='{{index .RepoDigests 0}}' $BASE_IMAGE)
          echo "Current digest: $CURRENT_DIGEST"

          # Log the findings
          echo "Base image update check completed"
          echo "It's recommended to periodically update the base image in your Dockerfile"

      - name: Scan for security misconfigurations
        uses: aquasecurity/trivy-action@master
        with:
          image-ref: aprs:${{ github.sha }}
          format: "table"
          output: "misconfig-results.txt"
          exit-code: "0"
          scanners: "config"

      - name: Upload misconfiguration report
        uses: actions/upload-artifact@v3
        if: always()
        with:
          name: misconfig-report
          path: misconfig-results.txt
          retention-days: 7

      - name: Generate comprehensive security report
        if: always()
        run: |
          echo "# Docker Image Security Report" > security-report.md
          echo "## Image: aprs:${{ github.sha }}" >> security-report.md
          echo "## Date: $(date)" >> security-report.md
          echo "## Base Image Update Status" >> security-report.md
          echo "\`\`\`" >> security-report.md
          cat outdated-dependencies.txt >> security-report.md
          echo "\`\`\`" >> security-report.md
          echo "## Application Dependencies Status" >> security-report.md
          echo "\`\`\`" >> security-report.md
          cat outdated-app-dependencies.txt >> security-report.md
          echo "\`\`\`" >> security-report.md
          echo "## Configuration Issues" >> security-report.md
          echo "\`\`\`" >> security-report.md
          cat misconfig-results.txt >> security-report.md
          echo "\`\`\`" >> security-report.md

      - name: Upload comprehensive security report
        uses: actions/upload-artifact@v3
        if: always()
        with:
          name: security-report
          path: security-report.md
          retention-days: 14

      - name: Fail on 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