name: Security

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]
  schedule:
    # Run weekly to catch new vulnerabilities
    - cron: "0 8 * * 1"
  workflow_dispatch: # Allow manual triggering

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  gitleaks:
    name: Scan for Secrets
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0 # Full history to ensure base/head SHAs are available for PR scans

      - name: Install Gitleaks
        run: |
          set -euo pipefail
          GITLEAKS_VERSION="8.24.3"
          GITLEAKS_BASE_URL="https://github.com/gitleaks/gitleaks/releases/download/v${GITLEAKS_VERSION}"
          RUNNER_ARCH="$(uname -m)"

          case "${RUNNER_ARCH}" in
            x86_64|amd64)
              GITLEAKS_ARCH="x64"
              ;;
            aarch64|arm64)
              GITLEAKS_ARCH="arm64"
              ;;
            *)
              echo "Unsupported runner architecture: ${RUNNER_ARCH}" >&2
              exit 1
              ;;
          esac

          ARCHIVE_NAME="gitleaks_${GITLEAKS_VERSION}_linux_${GITLEAKS_ARCH}.tar.gz"

          # Download gitleaks archive using the release filename so checksum verification works
          curl -sSfL "${GITLEAKS_BASE_URL}/${ARCHIVE_NAME}" -o "${ARCHIVE_NAME}"

          # Download the combined checksums file
          curl -sSfL "${GITLEAKS_BASE_URL}/gitleaks_${GITLEAKS_VERSION}_checksums.txt" -o gitleaks_checksums.txt

          # Verify checksum (sha256sum -c expects the filename in the checksums file to match the local file)
          grep "${ARCHIVE_NAME}" gitleaks_checksums.txt | sha256sum -c -

          # Extract the verified binary to a user-writable directory and add it to PATH
          INSTALL_DIR="${RUNNER_TEMP}/gitleaks-bin"
          mkdir -p "${INSTALL_DIR}"
          tar -xzf "${ARCHIVE_NAME}" -C "${INSTALL_DIR}" gitleaks
          echo "${INSTALL_DIR}" >> "${GITHUB_PATH}"

          # Clean up
          rm -f "${ARCHIVE_NAME}" gitleaks_checksums.txt

      - name: Run Gitleaks
        run: |
          if [ "${{ github.event_name }}" = "pull_request" ]; then
            # Ensure the base and head SHAs exist locally when checkout uses the PR merge ref
            git fetch origin ${{ github.event.pull_request.base.sha }} ${{ github.event.pull_request.head.sha }} --depth=1
            gitleaks detect --source . --verbose --log-opts "${{ github.event.pull_request.base.sha }}..${{ github.event.pull_request.head.sha }}"
          else
            gitleaks detect --source . --verbose --log-opts "-n 10"
          fi

  dependency-review:
    name: Dependency Review
    runs-on: ubuntu-latest
    if: github.event_name == 'pull_request'
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Dependency Review
        uses: actions/dependency-review-action@v4
        with:
          fail-on-severity: moderate

  npm-audit:
    name: NPM Audit
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Setup pnpm
        uses: pnpm/action-setup@v4

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: 20
          cache: pnpm

      - name: Install dependencies
        run: pnpm install --frozen-lockfile

      - name: Run npm audit
        run: pnpm audit --audit-level=moderate
        continue-on-error: true # Don't fail build on vulnerabilities in deps

      - name: Run pnpm audit (strict)
        run: pnpm audit --prod --audit-level=high
        continue-on-error: true # npm's legacy audit endpoint returns 410 Gone — non-blocking until pnpm upgrades to bulk advisory API