name: Preview — PR Build Check

on:
  pull_request:
    types: [opened, synchronize, reopened]

jobs:
  preview-build:
    name: PR Preview Build
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '22'
          cache: 'npm'

      - name: Install dependencies
        run: npm ci

      - name: Type check
        run: npm run typecheck

      - name: Run unit tests
        run: npm test

      - name: Build extension
        run: npm run build

      - name: Package preview ZIP
        run: npm run zip

      - name: Upload PR artifact
        uses: actions/upload-artifact@v4
        with:
          name: lexai-pr-${{ github.event.pull_request.number }}-preview
          path: .output/lexai-*.zip
          retention-days: 3

      - name: Comment on PR
        uses: actions/github-script@v7
        with:
          script: |
            github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: `## ⚡ LexAI Preview Build Ready\n\n✅ Tests passed\n✅ Build successful\n\n📦 Download the extension ZIP from the **Artifacts** section above to test this PR.\n\nCommit: \`${{ github.sha }}\``
            })