name: Dotty the Documenteer

on:
  push:
    branches:
      - master
    paths:
      - 'doc/**'
      - 'README.md'
      - 'mkdocs.yml'
      - '.github/workflows/docs.yml'
  pull_request:
    types: [opened, synchronize, reopened, labeled]
    paths:
      - 'doc/**'
      - 'README.md'
      - 'mkdocs.yml'
      - '.github/workflows/docs.yml'

permissions:
  contents: read

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0  # Needed for git-revision-date-localized plugin

      - name: Setup Python
        uses: actions/setup-python@v4
        with:
          python-version: '3.x'

      - name: Install dependencies
        run: |
          pipx install mkdocs
          pipx inject mkdocs mkdocs-material
          pipx inject mkdocs pymdown-extensions
          pipx inject mkdocs mkdocs-callouts
          pipx inject mkdocs mkdocs-glightbox

      - name: Build documentation
        run: mkdocs build --clean

      - name: Upload site artifact
        uses: actions/upload-artifact@v4
        with:
          name: site
          path: site/

  deploy:
    if: github.ref == 'refs/heads/master' && github.event_name == 'push'
    needs: build
    runs-on: ubuntu-latest

    steps:
      - name: Download site artifact
        uses: actions/download-artifact@v4
        with:
          name: site
          path: site/

      - name: Checkout pages repo
        uses: actions/checkout@v4
        with:
          repository: finit-project/finit-project.github.io
          path: pages
          ssh-key: ${{ secrets.DOCS_DEPLOY_KEY }}
          persist-credentials: true

      - name: Setup SSH for push
        run: |
          mkdir -p ~/.ssh
          chmod 700 ~/.ssh
          ssh-keyscan github.com >> ~/.ssh/known_hosts

      - name: Sync site to pages repo
        run: |
          rsync -a --delete --exclude .git site/ pages/

      - name: Commit and push
        run: |
          cd pages/
          if [ -z "$(git status --porcelain)" ]; then
              exit 0
          fi

          SRC_REPO="${GITHUB_REPOSITORY}"
          SRC_REF="${GITHUB_SHA::7}"
          SRC_URL="https://github.com/${SRC_REPO}/commit/${SRC_REF}"

          git config user.name "GitHub Actions"
          git config user.email "actions@github.com"
          git add -A
          git commit -m "docs: update from ${SRC_REPO}@${SRC_REF}" \
                     -m "For details, see ${SRC_URL}"
          git push