name: Version bump themes
on:
  workflow_dispatch:
    inputs:
      theme-slug:
        description: 'Theme slug'
        required: false
        default: 'all'
  
jobs:
  version-bump:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2
        with:
          fetch-depth: 0
          ref: trunk
      
      - name: Create branch
        id: create-branch
        run: |
          BRANCH_NAME="automated-version-bump/${{ github.run_number }}"
          git checkout -b $BRANCH_NAME
          echo "BRANCH_NAME=$BRANCH_NAME" >> $GITHUB_ENV

      - name: Setup Node.js
        uses: actions/setup-node@v2
        with:
          node-version: 20
          
      - name: Install node dependencies
        run: npm install

      - name: Version bump
        id: version-bump
        run: |
          if [ "${{ github.event.inputs.theme-slug }}" == 'all' ]; then
            npm run deploy:version-bump-from-last-bump
          else
            # Check if theme exists
            theme_exists=false
            target_theme_slug=${{ github.event.inputs.theme-slug }}

            # Loop through each subdirectory in the themes directory
            for dir in ./*/; do
                # Get the name of the directory (theme name)
                theme_dir_name=$(basename "$dir")
                
                # Check if the directory name matches the target theme name and if it contains a style.css file
                if [[ "$theme_dir_name" == "$target_theme_slug" && -f "$dir/style.css" ]]; then
                    theme_exists=true
                fi
            done

            # Error out if theme does not exist
            if [ "$theme_exists" == false ]; then
              echo "Theme `${{ github.event.inputs.theme-slug }}` does not exist"
              exit 1
            fi

            npm run deploy:version-bump-from-last-bump -- ${{ github.event.inputs.theme-slug }}
          fi

      - name: Check if there are changes
        id: check-changes
        run: |
          if [ "$(git diff --cached --name-only)" ]; then
            echo "HAS_CHANGES=true" >> $GITHUB_ENV
        
            # Get list of changed directory names for staged changes
            changed_dirs=$(git diff --cached --name-only | xargs -I {} dirname {} | sort | uniq)
        
            # Initialize an array for CHANGED_THEMES
            changed_themes=()
        
            # Iterate over the changed directories
            for dir in $changed_dirs; do
              if [ -f "$dir/style.css" ]; then
                # Append the directory to changed_themes array
                changed_themes+=("$dir")
              fi
            done
        
            # Join array elements into a string
            CHANGED_THEMES=$(IFS=,; echo "${changed_themes[*]}")
        
            echo "CHANGED_THEMES=$CHANGED_THEMES" >> $GITHUB_ENV
            echo "Themes with changes: $CHANGED_THEMES"
          else
            echo "HAS_CHANGES=false" >> $GITHUB_ENV
          fi

      - name: Commit changes
        if: env.HAS_CHANGES == 'true'
        run: |
            git config user.name 'github-actions[bot]'
            git config user.email 'github-actions[bot]@users.noreply.github.com'
            git add .
            git commit -m "Version bump & changelog update" --no-verify
            git push --set-upstream origin ${{ env.BRANCH_NAME }}

      - name: Create Pull Request
        if: env.HAS_CHANGES == 'true'
        env:
            GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
            CHANGED_THEMES: ${{ env.CHANGED_THEMES }}
        run: |
          echo "Creating PR for themes: $CHANGED_THEMES"
          THEMES_LIST=$(echo "$CHANGED_THEMES" | tr ',' '\n')
          PR_BODY=$(cat <<-EOF
          ## [Automation] Themes Version Bump

          This PR was automatically created by the version bump workflow.

          ### Updated Themes
          The following themes are being updated due to changes since the last git tag:

          $THEMES_LIST

          ### Why These Updates?
          This script bumps the version of themes that have changes since the last git tag. This ensures that any updates or fixes are properly versioned and deployed.

          ### Disclaimer
          This is an automated process. Please review the changes carefully.
          EOF
          )
          gh pr create \
          --title "[Automation] Themes version bump" \
          --base trunk \
          --head ${{ env.BRANCH_NAME }} \
          --body "$PR_BODY"