name: Docker Image Security Scan

on:
  schedule:
    # Run daily at 2 AM UTC
    - cron: '0 2 * * *'
  push:
    branches:
      - main
    tags:
      - 'v*.*.*'
  workflow_dispatch:

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: valknarness/awesome-app

jobs:
  scan:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: read
      security-events: write

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

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

      - name: Pull latest image
        run: |
          docker pull ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest || echo "Image not found, will skip scan"

      - name: Run Trivy vulnerability scanner
        uses: aquasecurity/trivy-action@master
        with:
          image-ref: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
          format: 'sarif'
          output: 'trivy-results.sarif'
          severity: 'CRITICAL,HIGH'

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

      - name: Run Trivy vulnerability scanner (table output)
        uses: aquasecurity/trivy-action@master
        with:
          image-ref: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
          format: 'table'
          severity: 'CRITICAL,HIGH,MEDIUM'

      - name: Generate scan summary
        if: always()
        run: |
          echo "### Security Scan Results :shield:" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "**Image:** \`${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest\`" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "**Scan Date:** $(date -u '+%Y-%m-%d %H:%M:%S UTC')" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "Check the Security tab for detailed vulnerability reports." >> $GITHUB_STEP_SUMMARY