name: Deploy Docs to GitHub Pages

on:
  push:
    branches:
      - master
      - docs_branch

jobs:
  check-docs-changes:
    runs-on: ubuntu-latest
    outputs:
      changed: ${{ steps.check_docs.outputs.changed }}

    steps:
    - name: Checkout repository
      uses: actions/checkout@v2
      with:
        fetch-depth: 0

    - name: Check for changes in docs directory
      id: check_docs
      run: |
        if git diff --name-only HEAD^ HEAD | grep -q '^docs/'; then
          echo "changed=true" >> $GITHUB_OUTPUT
        else
          echo "changed=false" >> $GITHUB_OUTPUT
        fi

  deploy:
    runs-on: ubuntu-latest
    needs: check-docs-changes
    if: ${{ needs.check-docs-changes.outputs.changed == 'true' }}
    steps:
    - name: Set up Python
      uses: actions/setup-python@v2
      with:
        python-version: '3.10'

    - name: Checkout repository
      uses: actions/checkout@v2

    - name: Install dependencies
      run: |
        python -m pip install --upgrade pip
        pip install -r docs_requirements.txt
      working-directory: ./docs

    - name: Build and deploy docs
      run: |
        mkdocs build
      working-directory: ./docs

    - name: List current directory contents
      run: |
        ls -la
        ls -la ./site
      working-directory: ./docs

    - name: Deploy
      uses: peaceiris/actions-gh-pages@v3
      with:
        github_token: ${{ secrets.UPDATE_GH_PAGES }}
        publish_dir: ./docs/site

    - name: Deploy via scp
      uses: appleboy/scp-action@master
      with:
        host: ${{ secrets.REMOTE_HOST }}
        username: ${{ secrets.REMOTE_USER }}
        key: ${{ secrets.SSH_PRIVATE_KEY }}
        port: ${{ secrets.REMOTE_PORT }}
        source: "./docs/site"
        target: ${{ secrets.REMOTE_DEST_PATH }}/../../