ci.yml

name: ci

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

permissions:
  contents: read
  # Required by wrangler-action for OIDC / deployments comment posting.
  deployments: write
  # Required so the post-deploy step can comment the preview URL on the PR.
  pull-requests: write

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - uses: actions/setup-node@v4
        with:
          node-version: '20'
          cache: 'npm'

      - run: npm ci

      - name: Check plain (machine UI) coverage
        run: npm run check:plain

      - name: Build site
        run: npm run build

      - uses: actions/upload-artifact@v4
        with:
          name: site-build
          path: dist/
          retention-days: 7

      # Deploy to Cloudflare Pages:
      #   - push to main           → production (pilotprotocol.pages.dev)
      #   - PR from internal branch → preview (<branch>.pilotprotocol.pages.dev)
      #   - PR from a fork          → skipped (no secret access on forks)
      - name: Deploy to Cloudflare Pages
        id: deploy
        if: |
          github.event_name == 'push' ||
          (github.event_name == 'pull_request' &&
           github.event.pull_request.head.repo.full_name == github.repository)
        uses: cloudflare/wrangler-action@v3
        with:
          apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}
          accountId: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
          # Cloudflare treats branch=main as production, anything else
          # as a preview environment with a branch-keyed subdomain.
          command: >-
            pages deploy dist
            --project-name=pilotprotocol
            --branch=${{ github.event_name == 'push' && 'main' || github.head_ref }}
            --commit-dirty=true

      # Sticky comment so subsequent pushes update the same comment
      # instead of stacking — keeps the PR thread clean. Header value
      # must be unique per comment kind on this repo.
      - name: Comment preview URL on PR
        if: |
          github.event_name == 'pull_request' &&
          steps.deploy.outputs.deployment-url
        uses: marocchino/sticky-pull-request-comment@v2
        with:
          header: cloudflare-pages-preview
          message: |
            🚀 **Preview deployed to Cloudflare Pages**

            - Commit deploy URL: ${{ steps.deploy.outputs.deployment-url }}
            - Branch alias: `https://${{ github.head_ref }}.pilotprotocol.pages.dev` (may take ~30s to propagate)
            - Commit: `${{ github.event.pull_request.head.sha }}`