name: Build and deploy static pages

on:
  push:
    branches: [main]
  workflow_dispatch:

env:
  HUGO_VERSION: "0.165.0"
  # Public URL served by the gitea-pages proxy. Override with a repo variable
  # (Settings → Actions → Variables → SITE_BASE_URL) if the site moves.
  SITE_BASE_URL: ${{ vars.SITE_BASE_URL || format('https://pub.sqrt.fr/{0}/', github.repository) }}

jobs:
  build-and-push:
    runs-on: ubuntu-latest

    permissions:
      contents: write

    steps:
      - uses: actions/checkout@v4
        with:
          # site/themes/PaperMod is a submodule
          submodules: recursive

      - name: Install Hugo
        run: |
          mkdir -p "$HOME/.local/bin"
          curl -sSfL "https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION}/hugo_extended_${HUGO_VERSION}_linux-amd64.tar.gz" \
            | tar -xz -C "$HOME/.local/bin" hugo
          echo "$HOME/.local/bin" >> "$GITHUB_PATH"
          "$HOME/.local/bin/hugo" version

      - name: Install site JS dependencies
        # site/assets/js/calendar.js imports @fullcalendar/* — Hugo's js.Build
        # resolves those from site/node_modules at build time.
        working-directory: site
        run: npm ci

      - name: Build site
        # Content under site/content/ is generated by ./build.sh and committed,
        # so CI only renders it — no data fetching happens here.
        run: hugo --source site --minify --gc --baseURL "$SITE_BASE_URL"

      - name: Deploy site
        uses: peaceiris/actions-gh-pages@v4
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          force_orphan: true
          publish_branch: gh-pages
          publish_dir: ./site/public