name: Etherpad Integration

# Boots a real Etherpad against this helper in a matrix of core versions
# and asserts the pad page renders cleanly. Catches interop regressions
# (for example the #7543 CJS/ESM settings.toolbar bug) *before* they
# propagate to every downstream plugin that depends on this helper.

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

permissions:
  contents: read

jobs:
  smoke:
    runs-on: ubuntu-latest
    strategy:
      # Don't cancel sibling versions if one fails — we want the full
      # compatibility picture in the check output, not just the first red.
      fail-fast: false
      matrix:
        etherpad-ref:
          # Oldest release we want to stay compatible with (v2.6.1 is the
          # last tag as of 2026-04; ships the core CJS/ESM interop bug).
          - v2.6.1
          # Current development tip (has the #7421 compat shim).
          - develop
    name: smoke (etherpad@${{ matrix.etherpad-ref }})
    steps:
      - name: Check out this helper
        uses: actions/checkout@v6
        with:
          path: plugin

      - name: Check out Etherpad core (${{ matrix.etherpad-ref }})
        uses: actions/checkout@v6
        with:
          repository: ether/etherpad
          ref: ${{ matrix.etherpad-ref }}
          path: etherpad

      - uses: pnpm/action-setup@v6
        name: Install pnpm
        with:
          version: 10
          run_install: false

      - uses: actions/setup-node@v6
        with:
          node-version: 25
          cache: pnpm
          cache-dependency-path: etherpad/pnpm-lock.yaml

      - name: Install Etherpad core dependencies
        working-directory: ./etherpad
        run: bin/installDeps.sh

      - name: Install this helper into Etherpad
        working-directory: ./etherpad
        run: pnpm run plugins i --path ../../plugin

      - name: Install a representative consumer (ep_font_color)
        working-directory: ./etherpad
        # Exercises the template({skip: () => settings.toolbar…}) path that
        # hit #7543. Installing via the public registry against the helper
        # we just linked verifies the resolver picks up our copy.
        run: pnpm run plugins i ep_font_color

      - name: Log which helper version Etherpad will load
        working-directory: ./etherpad
        # Informational only. Etherpad may resolve the helper either from the
        # local path or transitively via a consumer plugin (whichever pnpm
        # picks). The actual contract — "a crashing skip() does not take the
        # pad down" — is verified by the later pad-load step, not by version
        # equality.
        run: |
          pkg_path=$(find src/plugin_packages -maxdepth 5 -type f -name package.json \
                       -path '*ep_plugin_helpers*' 2>/dev/null | head -1)
          if [ -z "$pkg_path" ]; then
            echo "::warning::could not locate ep_plugin_helpers under src/plugin_packages/; listing tree"
            find src/plugin_packages -maxdepth 4 -type d | head -30
          else
            echo "helper installed at: $pkg_path"
            node -p "'helper version: ' + require('$(pwd)/$pkg_path').version"
          fi

      - name: Start Etherpad in the background
        working-directory: ./etherpad
        run: |
          nohup pnpm run dev > /tmp/etherpad.log 2>&1 &
          echo $! > /tmp/etherpad.pid

      - name: Wait for Etherpad to listen on :9001
        run: |
          for i in $(seq 1 60); do
            if curl -fsS http://localhost:9001/ -o /dev/null; then
              echo "Etherpad up after ${i}s"
              exit 0
            fi
            sleep 1
          done
          echo "::error::Etherpad did not start within 60s"
          tail -200 /tmp/etherpad.log
          exit 1

      - name: Load a pad and assert HTTP 200
        # The #7543 symptom was a 500 from eejs rendering the pad template.
        # A 200 on /p/<id> is the simplest proof that the helper's template
        # pipeline didn't throw when a consumer plugin is installed.
        run: |
          status=$(curl -s -o /tmp/pad.html -w '%{http_code}' http://localhost:9001/p/ci-smoke-$(date +%s))
          echo "pad status: $status"
          if [ "$status" != "200" ]; then
            echo "::error::Pad load returned $status (expected 200)"
            echo "--- pad body ---"
            cat /tmp/pad.html
            echo "--- server log (last 200 lines) ---"
            tail -200 /tmp/etherpad.log
            exit 1
          fi

      - name: Scan server log for uncaught template errors
        # On the buggy path Etherpad emits the crash at [ERROR] level from the
        # `settings` or `http` logger:
        #   [ERROR] settings - TypeError: ... Cannot read properties of
        #           undefined (reading 'indexOf') at Object.skip (ep_font_color)
        # The helper's swallowing WARN line looks the same textually but lives
        # at [WARN] level, so anchor the pattern to [ERROR] to avoid matching
        # our own intentional log entry.
        run: |
          if grep -E "\[ERROR\].*(Cannot read properties of undefined.*indexOf|TypeError.*eejs)" \
                  /tmp/etherpad.log; then
            echo "::error::Detected the #7543 crash pattern in server log"
            tail -200 /tmp/etherpad.log
            exit 1
          fi
          echo "no [ERROR]-level template crash pattern in log"

      - name: Upload server log on failure
        if: failure()
        uses: actions/upload-artifact@v7
        with:
          name: etherpad-log-${{ matrix.etherpad-ref }}
          path: /tmp/etherpad.log
          retention-days: 7

      - name: Stop Etherpad
        if: always()
        run: |
          if [ -f /tmp/etherpad.pid ]; then
            kill "$(cat /tmp/etherpad.pid)" 2>/dev/null || true
          fi