class ActionText::Generators::InstallGenerator

def append_javascript_dependencies
  destination = Pathname(destination_root)
  if (application_javascript_path = destination.join("app/javascript/application.js")).exist?
    insert_into_file application_javascript_path.to_s, %(\nimport "trix"\nimport "@rails/actiontext"\n)
  else
    say <<~INSTRUCTIONS, :green
      You must import the @rails/actiontext and trix JavaScript modules in your application entrypoint.
    INSTRUCTIONS
  end
  if (importmap_path = destination.join("config/importmap.rb")).exist?
    append_to_file importmap_path.to_s, %(pin "trix"\npin "@rails/actiontext", to: "actiontext.esm.js"\n)
  end
end

def create_actiontext_files
  template "actiontext.css", "app/assets/stylesheets/actiontext.css"
  gem_root = "#{__dir__}/../../../.."
  copy_file "#{gem_root}/app/views/active_storage/blobs/_blob.html.erb",
    "app/views/active_storage/blobs/_blob.html.erb"
  copy_file "#{gem_root}/app/views/layouts/action_text/contents/_content.html.erb",
    "app/views/layouts/action_text/contents/_content.html.erb"
end

def create_migrations
  rails_command "railties:install:migrations FROM=active_storage,action_text", inline: true
end

def enable_image_processing_gem
  if (gemfile_path = Pathname(destination_root).join("Gemfile")).exist?
    say "Ensure image_processing gem has been enabled so image uploads will work (remember to bundle!)"
    image_processing_regex = /gem ["']image_processing["']/
    if File.readlines(gemfile_path).grep(image_processing_regex).any?
      uncomment_lines gemfile_path, image_processing_regex
    else
      run "bundle add --skip-install image_processing"
    end
  end
end

def install_javascript_dependencies
  say "Installing JavaScript dependencies", :green
  if using_bun?
    run "bun add @rails/actiontext trix"
  elsif using_node?
    run "yarn add @rails/actiontext trix"
  end
end

def using_bun?
  # Cannot assume yarn.lock has been generated yet so we look for a file known to
  # be generated by the jsbundling-rails gem
  @using_bun ||= using_js_runtime? && Pathname(destination_root).join("bun.config.js").exist?
end

def using_js_runtime?
  @using_js_runtime ||= Pathname(destination_root).join("package.json").exist?
end

def using_node?
  # Bun is the only runtime that _isn't_ node.
  @using_node ||= using_js_runtime? && !Pathname(destination_root).join("bun.config.js").exist?
end