module TractorBeam
  class AppBuilder < Rails::AppBuilder
    def readme
      template "README.md.erb", "README.md"
    end

    def gitignore
      copy_file "tractor_beam_gitignore", ".gitignore"
    end

    def gemfile
      template "Gemfile.erb", "Gemfile"
    end

    def set_ruby_version
      create_file '.ruby-version', "#{TractorBeam::RUBY_VERSION}\n"
    end

    def procfile_dev
      template "Procfile.dev", "Procfile.dev"
    end

    def procfile
      template "Procfile", "Procfile"
    end

    def provide_setup_script
      template "bin_setup", "bin/setup", force: true
      run "chmod a+x bin/setup"
    end

    # Component Based frontend

    def remove_legacy_assets_folder
      remove_dir "app/assets"
    end

    def setup_root_frontend_folder
      empty_directory "frontend"

      inside "frontend" do
        directory "packs"
        directory "init"
      end
    end

    def create_application_layout
      template 'tractor_beam_layout.html.erb.erb',
       'app/views/layouts/application.html.erb',
       force: true
    end

    def setup_browserlist_rc
      template "browserlistrc", ".browserlistrc"
    end

    def customize_webpacker_yml
      say "Customizing webpacker.yml"

      gsub_file "config/webpacker.yml", "source_path: app/javascript", "source_path: frontend"
    end

    def prepend_view_path_to_application_controller
      insert_into_file "app/controllers/application_controller.rb",
        "  prepend_view_path Rails.root.join(\"frontend\")\n",
        after: "protect_from_forgery with: :exception\n"
    end

    # Linting

    def setup_js_linter
      run "yarn add --dev babel-eslint eslint eslint-config-airbnb-base " \
        "eslint-config-prettier eslint-import-resolver-webpack " \
        "eslint-plugin-import eslint-plugin-prettier " \
        "lint-staged pre-commit prettier"

      template "eslintrc", ".eslintrc"
    end

    def setup_style_linter
      run "yarn add --dev stylelint stylelint-config-standard"

      template "stylelintrc", ".stylelintrc"
    end

    def add_scripts_to_package_json
      scripts = <<-SCRIPTS
  "scripts": {
    "lint-staged": "$(yarn bin)/lint-staged"
  },
  "lint-staged": {
    "config/webpack/**/*.js": [
      "prettier --write",
      "eslint",
      "git add"
    ],
    "frontend/**/*.js": [
      "prettier --write",
      "eslint",
      "git add"
    ],
    "frontend/**/*.css": [
      "prettier --write",
      "stylelint --fix",
      "git add"
    ]
  },
  "pre-commit": [
    "lint-staged"
  ],
      SCRIPTS

      insert_into_file "package.json",
        scripts,
        after: "},\n"
    end

    # Generators

    def configure_generators
      config = <<-RUBY
    config.generators do |g|
      g.helper          false
      g.javascripts     false
      g.request_specs   false
      g.routing_specs   false
      g.stylesheets     false
      g.test_framework :rspec
      g.view_specs      false
      g.channel         assets: false
    end
      RUBY

      inject_into_class 'config/application.rb', 'Application', config
    end

    def component_generator
      empty_directory "lib/generators"

      template "component_generator", "lib/generators/component_generator.rb"
    end
  end
end