name: Update Prerelease Manifest on Dispatch

on:
  repository_dispatch:
    types: [update-prerelease-manifest]

# Prerelease dispatches arrive on every commit to a release branch. Serialize
# the runs and let a newer pending run replace an older pending one, since
# every run rewrites the complete prerelease entry anyway.
concurrency:
  group: update-prerelease-manifest
  cancel-in-progress: false

jobs:
  update_prerelease_manifest:
    runs-on: ubuntu-latest
    permissions:
      contents: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: "lts/*"

      - name: Update manifest-prerelease.json using Node.js script
        run: |
          node .github/scripts/update-prerelease-manifest.js
        env:
          CLIENT_PAYLOAD_JSON: ${{ toJSON(github.event.client_payload) }}

      - name: Validate JSON files
        run: python .github/scripts/validate-json.py

      - name: Commit and push
        if: success()
        env:
          PLUGIN_NAME: ${{ github.event.client_payload.pluginName }}
          PLUGIN_VERSION: ${{ github.event.client_payload.version }}
        run: |
          git config --global user.name "github-actions[bot]"
          git config --global user.email "github-actions[bot]@users.noreply.github.com"

          git add '*manifest-prerelease.json'

          if git diff --staged --quiet; then
            echo "No changes staged for commit. Working tree clean or no changes to specified file."
            exit 0
          fi

          git commit -m "chore: update ${PLUGIN_NAME} prerelease to v${PLUGIN_VERSION}"

          # Dispatches can arrive in quick succession; rebase and retry if
          # another run pushed between our checkout and push.
          for attempt in 1 2 3; do
            if git push origin HEAD:main; then
              exit 0
            fi
            echo "Push failed (attempt ${attempt}), rebasing onto latest main..."
            git pull --rebase origin main
          done

          echo "Failed to push after 3 attempts."
          exit 1