name: Deploy Docs

on:
  push:
    branches: [main]
  workflow_dispatch:

jobs:
  deploy:
    runs-on: ubuntu-22.04

    steps:
      - uses: actions/checkout@v4

      - name: Set up Python 3.10
        uses: actions/setup-python@v5
        with:
          python-version: '3.10'

      - name: Setup mdBook
        uses: peaceiris/actions-mdbook@v2
        with:
          mdbook-version: 'latest'

      - name: Run mdBook regression tests
        run: |
          python3 -m unittest discover -s tests -p 'test_prepare_mdbook.py'
          python3 -m unittest discover -s tests -p 'test_prepare_mdbook_zh.py'
          python3 -m unittest discover -s tests -p 'test_assemble_docs_publish_tree.py'
          python3 -m unittest discover -s tests -p 'test_ensure_book_resources.py'

      - name: Build English HTML with mdBook
        run: bash build_mdbook.sh

      - name: Build Chinese HTML with mdBook
        run: bash build_mdbook_zh.sh

      - name: Deploy to openmlsys.github.io
        env:
          DEPLOY_TOKEN: ${{ secrets.DEPLOY_TOKEN }}
        run: |
          git clone https://x-access-token:${DEPLOY_TOKEN}@github.com/openmlsys/openmlsys.github.io.git

          python3 tools/assemble_docs_publish_tree.py \
            --destination-root openmlsys.github.io \
            --docs-subdir docs \
            --en-source .mdbook/book \
            --zh-source .mdbook-zh/book

          cd openmlsys.github.io
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git add docs

          if git diff --cached --quiet; then
            echo "No changes to commit"
          else
            git commit -m "deploy: update docs from ${GITHUB_REPOSITORY}@${GITHUB_SHA}"
            git push
          fi