class ReactOnRails::Generators::ReactWithReduxGenerator

def add_redux_npm_dependencies
  # Add Redux dependencies as regular dependencies
  regular_packages = %w[redux react-redux]
  # Try using GeneratorHelper first (package manager agnostic)
  success = add_npm_dependencies(regular_packages)
  # Fallback to package manager detection if GeneratorHelper fails
  return if success
  package_manager = GeneratorMessages.detect_package_manager
  return unless package_manager
  install_packages_with_fallback(regular_packages, dev: false, package_manager: package_manager)
end

def add_redux_specific_messages
  # Append Redux-specific post-install instructions
  GeneratorMessages.add_info(
    GeneratorMessages.helpful_message_after_installation(component_name: "HelloWorldApp", route: "hello_world")
  )
end

def build_install_args(package_manager, dev, packages)
  # Security: Validate package manager to prevent command injection
  allowed_package_managers = %w[npm yarn pnpm bun].freeze
  unless allowed_package_managers.include?(package_manager)
    raise ArgumentError, "Invalid package manager: #{package_manager}"
  end
  base_commands = {
    "npm" => %w[npm install],
    "yarn" => %w[yarn add],
    "pnpm" => %w[pnpm add],
    "bun" => %w[bun add]
  }
  base_args = base_commands[package_manager].dup
  base_args << dev_flag_for(package_manager) if dev
  base_args + packages
end

def copy_base_files
  base_js_path = "redux/base"
  ext = component_extension(options)
  # Copy Redux-connected component to auto-bundling structure
  copy_file("#{base_js_path}/app/javascript/bundles/HelloWorld/startup/HelloWorldApp.client.#{ext}",
            "app/javascript/src/HelloWorldApp/ror_components/HelloWorldApp.client.#{ext}")
  copy_file("#{base_js_path}/app/javascript/bundles/HelloWorld/startup/HelloWorldApp.server.#{ext}",
            "app/javascript/src/HelloWorldApp/ror_components/HelloWorldApp.server.#{ext}")
  copy_file("#{base_js_path}/app/javascript/bundles/HelloWorld/components/HelloWorld.module.css",
            "app/javascript/src/HelloWorldApp/components/HelloWorld.module.css")
  # Update import paths in client component
  ror_client_file = "app/javascript/src/HelloWorldApp/ror_components/HelloWorldApp.client.#{ext}"
  gsub_file(ror_client_file, "../store/helloWorldStore", "../store/helloWorldStore")
  gsub_file(ror_client_file, "../containers/HelloWorldContainer",
            "../containers/HelloWorldContainer")
end

def copy_base_redux_files
  base_hello_world_path = "redux/base/app/javascript/bundles/HelloWorld"
  redux_extension = options.typescript? ? "ts" : "js"
  # Copy Redux infrastructure files with appropriate extension
  %W[actions/helloWorldActionCreators.#{redux_extension}
     containers/HelloWorldContainer.#{redux_extension}
     constants/helloWorldConstants.#{redux_extension}
     reducers/helloWorldReducer.#{redux_extension}
     store/helloWorldStore.#{redux_extension}
     components/HelloWorld.#{component_extension(options)}].each do |file|
       copy_file("#{base_hello_world_path}/#{file}",
                 "app/javascript/src/HelloWorldApp/#{file}")
     end
end

def create_appropriate_templates
  base_path = "base/base"
  config = {
    component_name: "HelloWorldApp"
  }
  # Only create the view template - no manual bundle needed for auto-bundling
  template("#{base_path}/app/views/hello_world/index.html.erb.tt",
           "app/views/hello_world/index.html.erb", config)
end

def create_redux_directories
  # Create auto-bundling directory structure for Redux
  empty_directory("app/javascript/src/HelloWorldApp/ror_components")
  # Create Redux support directories within the component directory
  dirs = %w[actions constants containers reducers store components]
  dirs.each { |name| empty_directory("app/javascript/src/HelloWorldApp/#{name}") }
end

def dev_flag_for(package_manager)
  case package_manager
  when "npm", "pnpm" then "--save-dev"
  when "yarn", "bun" then "--dev"
  end
end

def install_packages_with_fallback(packages, dev:, package_manager:)
  install_args = build_install_args(package_manager, dev, packages)
  success = system(*install_args)
  return if success
  install_command = install_args.join(" ")
  warning = <<~MSG.strip
    ⚠️  Failed to install Redux dependencies automatically.
    Please run manually:
        #{install_command}
  MSG
  GeneratorMessages.add_warning(warning)
end