name: Docs — Build & Deploy

# Builds the Docusaurus site under /website and, on push to beta, deploys
# to GitHub Pages at https://coplaydev.github.io/unity-mcp/.
#
# PR runs only build (no deploy) as a preview-validation step.
# Re-deploys also fire when the Python tool/resource registry changes,
# so M3's auto-generated reference pages stay fresh.

on:
  push:
    branches: [beta]
    paths:
      - website/**
      - docs/**
      - Server/src/services/tools/**
      - Server/src/services/resources/**
      - Server/src/services/registry/**
      - .github/workflows/docs-deploy.yml
  pull_request:
    branches: [beta, main]
    paths:
      - website/**
      - docs/**
      - Server/src/services/tools/**
      - Server/src/services/resources/**
      - Server/src/services/registry/**
      - .github/workflows/docs-deploy.yml
  workflow_dispatch: {}

permissions:
  contents: read
  pages: write
  id-token: write

concurrency:
  group: pages
  cancel-in-progress: false

jobs:
  build:
    name: Build site
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          # Full history so Docusaurus's showLastUpdateTime / showLastUpdateAuthor
          # can resolve real per-file commit metadata. Shallow clones make every
          # page report the latest commit instead.
          fetch-depth: 0
          # No push back from this workflow — the deploy uses the Pages
          # OIDC token issued by actions/deploy-pages, not the repo token.
          persist-credentials: false

      - name: Setup Node
        uses: actions/setup-node@v4
        with:
          node-version: 20
          cache: npm
          cache-dependency-path: website/package-lock.json

      - name: Install dependencies
        working-directory: website
        run: npm ci

      - name: Setup Pages
        if: github.event_name == 'push' && github.ref == 'refs/heads/beta'
        uses: actions/configure-pages@v5

      - name: Build
        working-directory: website
        env:
          # Inject the cookieless GoatCounter beacon when provisioned. The site
          # gates on process.env.GOATCOUNTER_CODE, which Actions does NOT
          # auto-expose — the Actions variable must be mapped in explicitly.
          GOATCOUNTER_CODE: ${{ vars.GOATCOUNTER_CODE }}
        run: npm run build

      - name: Upload Pages artifact
        if: github.event_name == 'push' && github.ref == 'refs/heads/beta'
        uses: actions/upload-pages-artifact@v3
        with:
          path: website/build

  deploy:
    name: Deploy to GitHub Pages
    needs: build
    if: github.event_name == 'push' && github.ref == 'refs/heads/beta'
    runs-on: ubuntu-latest
    environment:
      name: github-pages
      url: ${{ steps.deployment.outputs.page_url }}
    steps:
      - name: Deploy
        id: deployment
        uses: actions/deploy-pages@v4