name: Python Dependency Audit

on:
  workflow_call:
    inputs:
      python-version:
        type: string
        default: '3.11'
      install-extras:
        type: string
        default: 'dev'
      working-directory:
        type: string
        default: '.'
  workflow_dispatch:

jobs:
  python-dependency-audit:
    runs-on: ubuntu-latest
    defaults:
      run:
        working-directory: ${{ inputs.working-directory }}
    steps:
      - name: Checkout
        uses: https://gitea.com/actions/checkout@v6

      - name: Setup Python
        uses: https://github.com/actions/setup-python@v5.2.0
        with:
          python-version: ${{ inputs.python-version || '3.11' }}

      - name: Cache pip
        uses: https://github.com/actions/cache@v4
        with:
          path: ~/.cache/pip
          key: ${{ runner.os }}-pip-${{ inputs.python-version }}-${{ hashFiles('**/pyproject.toml', '**/requirements*.txt') }}
          restore-keys: |
            ${{ runner.os }}-pip-${{ inputs.python-version }}-
            ${{ runner.os }}-pip-

      - name: Install dependencies (isolated venv)
        run: |
          # venv pulita: audita SOLO le dipendenze dichiarate dal repo,
          # non l'ambiente globale del runner (che su runner ML/GPU è contaminato)
          python -m venv .audit-venv
          .audit-venv/bin/pip install --upgrade pip pip-audit
          if [ -n "${{ inputs.install-extras }}" ]; then
            .audit-venv/bin/pip install -e ".[${{ inputs.install-extras }}]"
          elif [ -f requirements.txt ]; then
            .audit-venv/bin/pip install -r requirements.txt
          else
            .audit-venv/bin/pip install -e "."
          fi

      - name: Security audit (pip-audit)
        id: audit
        run: |
          .audit-venv/bin/pip-audit --format=json --output=audit.json 2>/dev/null || true
          VULNS=$(python3 -c "
          import json, sys
          try:
            data = json.load(open('audit.json'))
            deps = data.get('dependencies', [])
            count = sum(len(d.get('vulns', [])) for d in deps)
            print(count)
          except Exception:
            print(0)
          ")
          echo "vulnerabilities=$VULNS" >> $GITHUB_OUTPUT

      - name: Open or update issue if vulnerabilities found
        if: steps.audit.outputs.vulnerabilities != '0'
        env:
          GITEA_TOKEN: ${{ gitea.token }}
          SERVER_URL: ${{ gitea.server_url }}
          REPOSITORY: ${{ gitea.repository }}
        run: |
          VULNS="${{ steps.audit.outputs.vulnerabilities }}"
          DATE=$(date '+%Y-%m-%d')
          TITLE_PREFIX="Security Python:"

          VULN_LIST=$(python3 -c "
          import json
          try:
            data = json.load(open('audit.json'))
            lines = []
            for dep in data.get('dependencies', []):
              for v in dep.get('vulns', []):
                lines.append(f\"- {dep['name']} {dep.get('version','?')}: {v.get('id','?')} ({v.get('description','')[:80]})\")
            print('\n'.join(lines[:20]))
          except Exception:
            print('N/A')
          ")

          printf '## Security Audit Python — %s\n\n### Vulnerabilità trovate: %s\n\n```\n%s\n```\n' \
            "$DATE" "$VULNS" "$VULN_LIST" > /tmp/body.md

          # Deduplica: se esiste già una issue aperta con lo stesso prefisso,
          # aggiungi un commento invece di aprirne una nuova
          EXISTING=$(curl -s \
            -H "Authorization: token $GITEA_TOKEN" \
            "$SERVER_URL/api/v1/repos/$REPOSITORY/issues?state=open&type=issues&limit=50" \
            | jq -r --arg p "$TITLE_PREFIX" '[.[] | select(.title | contains($p))] | (first // {}) | .number // empty')

          if [ -n "$EXISTING" ]; then
            curl -s -X POST \
              -H "Content-Type: application/json" \
              -H "Authorization: token $GITEA_TOKEN" \
              "$SERVER_URL/api/v1/repos/$REPOSITORY/issues/$EXISTING/comments" \
              -d "{ \"body\": $(jq -Rs . /tmp/body.md) }"
          else
            curl -s -X POST \
              -H "Content-Type: application/json" \
              -H "Authorization: token $GITEA_TOKEN" \
              "$SERVER_URL/api/v1/repos/$REPOSITORY/issues" \
              -d "{
                \"title\": \"[$DATE] Security Python: $VULNS vulnerabilità rilevate\",
                \"body\": $(jq -Rs . /tmp/body.md)
              }"
          fi