name: Upgrade React Experimental ⚛️

on:
  schedule:
    # Run daily at 06:00 UTC
    - cron: "0 6 * * *"
  workflow_dispatch:

env:
  PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: "1"

permissions:
  contents: write
  pull-requests: write

concurrency:
  group: upgrade-react-experimental
  cancel-in-progress: true

jobs:
  upgrade-react:
    name: Upgrade React to latest experimental
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Generate GitHub App token
        id: app-token
        uses: actions/create-github-app-token@v1
        with:
          app-id: ${{ secrets.APP_ID }}
          private-key: ${{ secrets.APP_PRIVATE_KEY }}

      - name: Check for existing open PR
        id: pr
        env:
          GH_TOKEN: ${{ steps.app-token.outputs.token }}
        run: |
          OPEN=$(gh pr list --head chore/upgrade-react-experimental --state open --json number --jq 'length')
          if [ "$OPEN" -gt 0 ]; then
            echo "exists=true" >> "$GITHUB_OUTPUT"
            echo "An open upgrade PR already exists, skipping."
          else
            echo "exists=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Get current React version
        if: steps.pr.outputs.exists == 'false'
        id: current
        run: |
          CURRENT=$(jq -r '.dependencies.react' packages/react-server/package.json)
          echo "version=$CURRENT" >> "$GITHUB_OUTPUT"
          echo "Current React experimental version: $CURRENT"

      - name: Get latest React experimental version
        if: steps.pr.outputs.exists == 'false'
        id: latest
        run: |
          LATEST=$(npm view react@experimental version)
          echo "version=$LATEST" >> "$GITHUB_OUTPUT"
          echo "Latest React experimental version: $LATEST"

      - name: Check if upgrade is needed
        if: steps.pr.outputs.exists == 'false'
        id: check
        run: |
          if [ "${{ steps.current.outputs.version }}" = "${{ steps.latest.outputs.version }}" ]; then
            echo "needed=false" >> "$GITHUB_OUTPUT"
            echo "Already on latest experimental version, skipping."
          else
            echo "needed=true" >> "$GITHUB_OUTPUT"
            echo "Upgrade needed: ${{ steps.current.outputs.version }} → ${{ steps.latest.outputs.version }}"
          fi

      - name: Install pnpm
        if: steps.pr.outputs.exists == 'false' && steps.check.outputs.needed == 'true'
        uses: pnpm/action-setup@v4.0.0

      - name: Setup Node
        if: steps.pr.outputs.exists == 'false' && steps.check.outputs.needed == 'true'
        uses: actions/setup-node@v4
        with:
          node-version: "24"
          cache: "pnpm"

      - name: Replace React versions in package.json files and docs
        if: steps.pr.outputs.exists == 'false' && steps.check.outputs.needed == 'true'
        run: |
          OLD="${{ steps.current.outputs.version }}"
          NEW="${{ steps.latest.outputs.version }}"
          echo "Replacing $OLD → $NEW..."

          # Find all package.json files (exclude node_modules and packages/rsc)
          find . -name 'package.json' -not -path '*/node_modules/*' -not -path './packages/rsc/*' | while read -r file; do
            if grep -q "$OLD" "$file"; then
              echo "  Updating: $file"
              sed -i "s|$OLD|$NEW|g" "$file"
            fi
          done

          # Also update docs (micro-frontends MDX files reference esm.sh URLs with the version)
          find ./docs -name '*.mdx' | while read -r file; do
            if grep -q "$OLD" "$file"; then
              echo "  Updating: $file"
              sed -i "s|$OLD|$NEW|g" "$file"
            fi
          done

          echo "Done replacing React versions."

      - name: Install deps
        if: steps.pr.outputs.exists == 'false' && steps.check.outputs.needed == 'true'
        run: pnpm install --no-frozen-lockfile

      - uses: ./.github/workflows/actions/common-playwright
        if: steps.pr.outputs.exists == 'false' && steps.check.outputs.needed == 'true'

      - name: Smoke test (dev mode — hello world)
        if: steps.pr.outputs.exists == 'false' && steps.check.outputs.needed == 'true'
        working-directory: ./test
        run: pnpm test-dev -t "hello world"

      - name: Smoke test (build+start mode — hello world)
        if: steps.pr.outputs.exists == 'false' && steps.check.outputs.needed == 'true'
        working-directory: ./test
        run: pnpm test-build-start -t "hello world"

      - name: Clean up test artifacts
        if: steps.pr.outputs.exists == 'false' && steps.check.outputs.needed == 'true'
        run: rm -rf test/test-results test/junit.xml

      - name: Create Pull Request
        if: steps.pr.outputs.exists == 'false' && steps.check.outputs.needed == 'true'
        uses: peter-evans/create-pull-request@v7
        with:
          token: ${{ steps.app-token.outputs.token }}
          commit-message: "chore: upgrade React experimental to ${{ steps.latest.outputs.version }}"
          title: "chore: upgrade React experimental to ${{ steps.latest.outputs.version }}"
          body: |
            Automated daily upgrade of React packages to the latest experimental version.

            **Previous version:** `${{ steps.current.outputs.version }}`
            **New version:** `${{ steps.latest.outputs.version }}`

            ### Updated locations
            - `packages/react-server/package.json` — `react`, `react-dom`, `react-is`
            - `package.json` — all `pnpm.overrides` for React
            - `docs/` — micro-frontends MDX (en + ja) esm.sh URLs
            - `pnpm-lock.yaml`

            ### Smoke test
            - Dev mode — `hello world` test passed ✅
            - Build+start mode — `hello world` test passed ✅
          branch: chore/upgrade-react-experimental
          delete-branch: true
          labels: dependencies