name: Sync README files to Wiki

on:
  push:
    branches: [ main ]
    paths:
      - '**/README.md'
      - '**/readme.md'

permissions:
  contents: write
      
jobs:
  sync-wiki:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      
      - name: Configure Git for Wiki
        run: |
          git config --global user.name "GitHub Actions"
          git config --global user.email "actions@github.com"
      
      - name: Clone Wiki Repository
        run: git clone https://${{ github.actor }}:${{ secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}.wiki.git ./wiki
      
      - name: Copy README files to Wiki
        run: |
          # Special mappings - add specific README files to specific wiki pages
          declare -A special_mappings
          special_mappings["benchmarks/rotatingDrum/readme.md"]="Performance-of-phasicFlow.md"
          
          # Create an images directory in the wiki if it doesn't exist
          mkdir -p ./wiki/images
          
          # Process mapped files
          for rel_path in "${!special_mappings[@]}"; do
            if [ -f "./$rel_path" ]; then
              wiki_page="${special_mappings[$rel_path]}"
              echo "Processing special mapping: $rel_path -> $wiki_page"
              
              # Get the base directory of the readme file
              base_dir=$(dirname "./$rel_path")
              
              # Read content of the README file
              content=$(cat "./$rel_path")
              
              # Process image references line by line for more reliable detection
              while IFS= read -r line; do
                if [[ $line =~ !\[([^]]*)\]\(([^)]+)\) ]]; then
                  img_path="${BASH_REMATCH[2]}"
                  
                  # Skip URLs
                  if [[ $img_path == http* ]]; then
                    continue
                  fi
                  
                  # Determine the absolute path of the image
                  if [[ $img_path == /* ]]; then
                    # Absolute path within repository
                    abs_img_path="./$img_path"
                  else
                    # Relative path to the README
                    abs_img_path="$base_dir/$img_path"
                  fi
                  
                  # Extract just the filename
                  img_filename=$(basename "$img_path")
                  wiki_img_path="images/$img_filename"
                  
                  # Copy the image to wiki repository if it exists
                  if [ -f "$abs_img_path" ]; then
                    echo "Copying image: $abs_img_path -> ./wiki/$wiki_img_path"
                    cp "$abs_img_path" "./wiki/$wiki_img_path"
                    
                    # Replace the image reference in content using a safer delimiter
                    content=$(echo "$content" | sed "s|!\\[\(.*\\)\\]($img_path)|![\\1]($wiki_img_path)|g")
                    echo "Replaced image reference: $img_path → $wiki_img_path"
                  else
                    echo "Warning: Image file not found: $abs_img_path"
                  fi
                fi
              done < "./$rel_path"
              
              # Replace the wiki page with the updated content rather than appending
              echo -e "# $(basename "$wiki_page" .md)\n\nContent from $rel_path:\n\n$content" > "./wiki/$wiki_page"
              echo "Updated wiki page: $wiki_page"
            fi
          done
      
      - name: Commit and Push to Wiki
        working-directory: ./wiki
        run: |
          git add .
          git diff-index --quiet HEAD || git commit -m "Sync README files from main repository"
          git push