name: Publish site

on:
  push:
    branches: [main]
  workflow_dispatch:

env:
  QUARTO_VERSION: "1.10.18"

jobs:
  build-deploy:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Install Quarto
        run: |
          set -e
          curl -sSL -o /tmp/quarto.tar.gz \
            "https://github.com/quarto-dev/quarto-cli/releases/download/v${QUARTO_VERSION}/quarto-${QUARTO_VERSION}-linux-amd64.tar.gz"
          mkdir -p "$HOME/opt"
          tar -xzf /tmp/quarto.tar.gz -C "$HOME/opt"
          echo "$HOME/opt/quarto-${QUARTO_VERSION}/bin" >> "$GITHUB_PATH"

      - name: Render
        run: quarto render

      - name: Deploy to gh-pages
        env:
          TOKEN: ${{ secrets.GITEA_TOKEN }}
        run: |
          set -e
          REMOTE="https://x-access-token:${TOKEN}@gitea.spacilovi.eu/${GITHUB_REPOSITORY}.git"

          git config --global user.name "gitea-actions"
          git config --global user.email "gitea-actions@spacilovi.eu"

          # pracovní kopie gh-pages (zachová dosavadní historii větve)
          if git ls-remote --exit-code "$REMOTE" gh-pages >/dev/null 2>&1; then
            git fetch "$REMOTE" gh-pages
            git worktree add /tmp/gh-pages FETCH_HEAD
            cd /tmp/gh-pages
            git checkout -B gh-pages
          else
            mkdir -p /tmp/gh-pages
            cd /tmp/gh-pages
            git init -q -b gh-pages
          fi

          # zahodit staré soubory (kromě .git) a nakopírovat nový build
          find . -mindepth 1 -maxdepth 1 ! -name .git -exec rm -rf {} +
          cp -a "${GITHUB_WORKSPACE}/_site/." .
          touch .nojekyll

          git add -A
          if git diff --cached --quiet; then
            echo "Beze změn, nic se nepublikuje."
            exit 0
          fi
          git commit -q -m "Built site for gh-pages (${GITHUB_SHA::7})"
          git push "$REMOTE" HEAD:gh-pages