name: Build and upload Documentation 

on: 
    workflow_dispatch: 
    push: # Only for Testing change later 
    pull_request:
        branches:
            - developer
            - main
    release:
        types:
            - published

env: 
    BUILD_TYPE: RELEASE 

permissions:
  contents: write  # Required to push to gh-pages branch
  pages: write     # Required for GitHub Pages deployment
  id-token: write  # Required for GitHub Pages deployment

jobs:
    build-and-deploy:
        strategy: 
            matrix:
                patform: [ubuntu-latest]
                python-version: ["3.12"]
        runs-on: ${{ matrix.patform }}

        defaults:
            run:
                shell: "bash -l {0}"

        steps:
            - uses: actions/checkout@v4
              with:
                fetch-depth: 0  # Fetch all history for proper git operations
                token: ${{ secrets.GITHUB_TOKEN }}  # Use the default token

            # Extract release version (if triggered by release)
            - name: Get Release Version
              id: version
              run: |
                if [ "${{ github.event_name }}" == "release" ]; then
                  VERSION="${{ github.event.release.tag_name }}"
                  echo "version=${VERSION}" >> $GITHUB_OUTPUT
                else
                  echo "version=developer" >> $GITHUB_OUTPUT
                fi

            - name: Install System Packages
              uses: awalsh128/cache-apt-pkgs-action@latest
              with:
                packages: libhdf5-dev doxygen
                version: 1.0

            - name: Setup Python
              uses: actions/setup-python@v5
              with:
                python-version: 3.12
                cache: 'pip'
            
            - name: Install Python Packages
              run: pip install sphinx sphinx_rtd_theme breathe pyyaml jinja2
               

            - name: Build Documentation
              run: |
                mkdir build
                cd build
                cmake -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}} -DSLS_BUILD_DOCS=ON -DSLS_USE_HDF5=ON -DSLS_USE_PYTHON=ON ..
                make -j4 
                make docs
        
            # Update main index if this is a release
            - name: Update version index
              if: github.event_name == 'release'
              run: |
                python docs/main_index/render_main_index.py \
                --version "${{ steps.version.outputs.version }}" \
                --date "$(date +'%d.%m.%Y')" 

            - name: Checkout gh-pages
              uses: actions/checkout@v4
              with:
                ref: gh-pages
                path: gh-pages
                
            
            - name: Copy documentation and Release notes to versioned folder
             
              run: |
                VERSION="${{ steps.version.outputs.version }}"
                mkdir -p "gh-pages/${VERSION}"
                cp -r build/docs/html/. "gh-pages/${VERSION}/"
                cp build/docs/main_index/index.html "gh-pages/index.html"
                cp build/docs/main_index/index.html gh-pages/_sources/index.html.txt
                if [ "${{ github.event_name }}" == "release" ]; then
                  cp  RELEASE.md "gh-pages/releases/RELEASE_v${VERSION}.md" 
                fi 
              
            - name: Commit and Push changes to gh-pages
              run: |
                cd gh-pages
                git config --global user.name 'github-actions'
                git config --global user.email 'github-actions@github.com'
                git add .
                git commit -m "Update Documentation for ${{ steps.version.outputs.version }}"
                git remote set-url origin https://x-access-token:${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY}.git
                git push origin gh-pages 
              env: 
                GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}