# Feature B (+C) — Security-Scan (HART blockierend) + KI-Klartext-Erklärung.
# Kopie -> .gitea/workflows/security.yml
#
# Schlankes alpine-Image + Memory-Cap (Pi-Runner, capacity 1).  ⚠ ARM64-Binaries!
# Gitleaks (Secrets) + Trivy config (IaC/Misconfig) — bewusst OHNE schweren
# Vuln-DB-Scan (RAM-/zeitschonend auf dem Pi). Funde lassen den Check hart
# fehlschlagen; danach erklärt die KI sie im PR (überspringt sauber ohne Key).
name: Security

on:
  workflow_dispatch: {}
  pull_request:

env:
  GITLEAKS_VERSION: "8.18.4"

jobs:
  scan:
    runs-on: eulernest
    container:
      image: alpine:3.20
      options: "--memory=768m --memory-swap=1024m"
    steps:
      - name: Tooling
        run: apk add --no-cache git curl bash tar python3

      - name: Repo auschecken (git.eulernest.eu -> LAN via Runner-add-host)
        run: git clone --depth 1 "https://git.eulernest.eu/${GITHUB_REPOSITORY}.git" src

      - name: Gitleaks (Secret-Scan, ARM64)
        id: gl
        run: |
          curl -sSL "https://github.com/gitleaks/gitleaks/releases/download/v${GITLEAKS_VERSION}/gitleaks_${GITLEAKS_VERSION}_linux_arm64.tar.gz" \
            | tar -xz -C /usr/local/bin gitleaks
          cd src && gitleaks detect --no-git --source . --redact -v 2>&1 | tee /tmp/scan.log
          echo "code=${PIPESTATUS[0]}" >> "$GITHUB_OUTPUT"

      - name: Trivy (IaC/config, leicht)
        id: tv
        run: |
          curl -sSL https://raw.githubusercontent.com/aquasecurity/trivy/main/contrib/install.sh \
            | sh -s -- -b /usr/local/bin
          cd src && trivy config --severity HIGH,CRITICAL --exit-code 1 --no-progress . 2>&1 | tee -a /tmp/scan.log
          echo "code=${PIPESTATUS[0]}" >> "$GITHUB_OUTPUT"

      - name: Gate — hart blockieren bei Funden
        run: |
          if [ "${{ steps.gl.outputs.code }}" != "0" ] || [ "${{ steps.tv.outputs.code }}" != "0" ]; then
            echo "Security-Funde -> Check schlägt fehl (hart blockierend)."; exit 1
          fi
          echo "Keine HIGH/CRITICAL-Funde."

      - name: KI erklärt die Funde (nur bei Fehler, überspringt ohne Key)
        if: failure()
        env:
          AI_PROVIDER: ollama
          AI_MODEL: coder
          AI_BASE_URL: http://192.168.178.103:11434/v1
          GITEA_TOKEN: ${{ github.token }}
          GITEA_API: https://git.eulernest.eu/api/v1
        run: |
          git clone --depth 1 https://git.eulernest.eu/user2595/ci-ai.git /opt/ci-ai
          python3 /opt/ci-ai/scripts/ai_explain.py security /tmp/scan.log