name: Archive GitHub Traffic

on:
  schedule:
    - cron: '17 3 * * *'
  workflow_dispatch:

permissions:
  contents: write

concurrency:
  group: traffic-archive
  cancel-in-progress: false

env:
  TRAFFIC_ARCHIVE_BRANCH: traffic-archive
  TRAFFIC_ARCHIVE_DIR: ../traffic-archive/traffic

jobs:
  archive:
    name: Capture traffic snapshot
    runs-on: ubuntu-latest
    steps:
      - name: Checkout source
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

      - name: Setup Node
        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
        with:
          node-version: '20'
          cache: 'npm'

      - name: Prepare archive branch
        env:
          ARCHIVE_PUSH_TOKEN: ${{ github.token }}
        run: |
          set -euo pipefail

          git config --global user.name "github-actions[bot]"
          git config --global user.email "41898282+github-actions[bot]@users.noreply.github.com"

          server="${GITHUB_SERVER_URL#https://}"
          archive_remote="https://x-access-token:${ARCHIVE_PUSH_TOKEN}@${server}/${GITHUB_REPOSITORY}.git"

          if git ls-remote --exit-code --heads "${archive_remote}" "${TRAFFIC_ARCHIVE_BRANCH}" >/dev/null 2>&1; then
            git clone --branch "${TRAFFIC_ARCHIVE_BRANCH}" --depth 1 "${archive_remote}" ../traffic-archive
          else
            git init -b "${TRAFFIC_ARCHIVE_BRANCH}" ../traffic-archive
            git -C ../traffic-archive remote add origin "${archive_remote}"
          fi

          mkdir -p "${TRAFFIC_ARCHIVE_DIR}"

      - name: Collect traffic
        env:
          GH_TRAFFIC_TOKEN: ${{ secrets.TRAFFIC_ARCHIVE_TOKEN || github.token }}
          GITHUB_REPOSITORY: ${{ github.repository }}
        run: node scripts/archive-github-traffic.mjs --archive-dir "${TRAFFIC_ARCHIVE_DIR}"

      - name: Commit archive
        run: |
          set -euo pipefail

          cd ../traffic-archive
          git add traffic/archive.json traffic/summary.json
          git rm --ignore-unmatch traffic/README.md

          if git diff --cached --quiet; then
            echo "No traffic archive changes."
            exit 0
          fi

          git commit -m "chore(traffic): archive repository traffic $(date -u +%F)"
          git push origin HEAD:${TRAFFIC_ARCHIVE_BRANCH}