name: 'Setup Gemini CLI'
description: 'Sets up the environment and either builds from source or uses a pre-built bundle.'

inputs:
  mode:
    description: 'Setup mode: "source" (build from scratch) or "bundle" (use pre-built artifact)'
    required: true
    default: 'source'
  bundle-artifact:
    description: 'The name of the bundle artifact to download if mode is "bundle"'
    required: false

runs:
  using: 'composite'
  steps:
    - name: 'Set up Node.js'
      uses: 'actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020'
      with:
        node-version-file: '.nvmrc'
        cache: 'npm'

    - name: 'Install dependencies'
      run: 'npm ci'
      shell: 'bash'

    - name: 'Build from source'
      if: "${{ inputs.mode == 'source' }}"
      run: 'npm run build'
      shell: 'bash'

    - name: 'Download Bundle Artifact'
      if: "${{ inputs.mode == 'bundle' }}"
      uses: 'actions/download-artifact@cc203385981b70ca67e1cc392babf9cc229d5806' # v4
      with:
        name: '${{ inputs.bundle-artifact }}'
        path: 'bundle'

    - name: 'Post-bundle setup'
      if: "${{ inputs.mode == 'bundle' }}"
      run: |
        # Ensure the bundle is ready for use
        # In a real install, we might symlink bin/gemini to bundle/gemini.js
        # For now, we just list it to verify it exists
        ls -R bundle
      shell: 'bash'