require 'rails/generators'
require 'highline/import'
require 'bundler'
require 'bundler/cli'

module Spree
  class InstallGenerator < Rails::Generators::Base
    class_option :migrate, :type => :boolean, :default => true, :banner => 'Run Spree migrations'
    class_option :seed, :type => :boolean, :default => true, :banner => 'load seed data (migrations must be run)'
    class_option :sample, :type => :boolean, :default => true, :banner => 'load sample data (migrations must be run)'
    class_option :auto_accept, :type => :boolean
    class_option :user_class, :type => :string
    class_option :admin_email, :type => :string
    class_option :admin_password, :type => :string
    class_option :lib_name, :type => :string, :default => 'spree'
    class_option :enforce_available_locales, :type => :boolean, :default => nil

    def self.source_paths
      paths = self.superclass.source_paths
      paths << File.expand_path('../templates', "../../#{__FILE__}")
      paths << File.expand_path('../templates', "../#{__FILE__}")
      paths << File.expand_path('../templates', __FILE__)
      paths.flatten
    end

    def prepare_options
      @run_migrations = options[:migrate]
      @load_seed_data = options[:seed]
      @load_sample_data = options[:sample]

      unless @run_migrations
         @load_seed_data = false
         @load_sample_data = false
      end
    end

    def add_files
      template 'config/initializers/spree.rb', 'config/initializers/spree.rb'
    end

    def config_spree_yml
      create_file "config/spree.yml" do
        settings = { 'version' => Spree.version }

        settings.to_yaml
      end
    end

    def additional_tweaks
      return unless File.exists? 'public/robots.txt'
      append_file "public/robots.txt", <<-ROBOTS
User-agent: *
Disallow: /checkout
Disallow: /cart
Disallow: /orders
Disallow: /user
Disallow: /account
Disallow: /api
Disallow: /password
      ROBOTS
    end

    def setup_assets
      @lib_name = 'spree'
      %w{javascripts stylesheets images}.each do |path|
        empty_directory "vendor/assets/#{path}/spree/frontend" if defined? Spree::Frontend || Rails.env.test?
        empty_directory "vendor/assets/#{path}/spree/backend" if defined? Spree::Backend || Rails.env.test?
      end

      if defined? Spree::Frontend || Rails.env.test?
        template "vendor/assets/javascripts/spree/frontend/all.js"
        template "vendor/assets/stylesheets/spree/frontend/all.css"
      end

      if defined? Spree::Backend || Rails.env.test?
        template "vendor/assets/javascripts/spree/backend/all.js"
        template "vendor/assets/stylesheets/spree/backend/all.css"
      end
    end

    def create_overrides_directory
      empty_directory "app/overrides"
    end

    def configure_application
      application <<-APP

    config.to_prepare do
      # Load application's model / class decorators
      Dir.glob(File.join(File.dirname(__FILE__), "../app/**/*_decorator*.rb")) do |c|
        Rails.configuration.cache_classes ? require(c) : load(c)
      end

      # Load application's view overrides
      Dir.glob(File.join(File.dirname(__FILE__), "../app/overrides/*.rb")) do |c|
        Rails.configuration.cache_classes ? require(c) : load(c)
      end
    end
      APP

      if !options[:enforce_available_locales].nil?
        application <<-APP
    # Prevent this deprecation message: https://github.com/svenfuchs/i18n/commit/3b6e56e
    I18n.enforce_available_locales = #{options[:enforce_available_locales]}
        APP
      end
    end

    def include_seed_data
      append_file "db/seeds.rb", <<-SEEDS
\n
Spree::Core::Engine.load_seed if defined?(Spree::Core)
Spree::Auth::Engine.load_seed if defined?(Spree::Auth)
      SEEDS
    end

    def install_migrations
      say_status :copying, "migrations"
      silence_stream(STDOUT) do
        silence_warnings { rake 'railties:install:migrations' }
      end
    end

    def create_database
      say_status :creating, "database"
      silence_stream(STDOUT) do
        silence_stream(STDERR) do
          silence_warnings { rake 'db:create' }
        end
      end
    end

    def run_migrations
      if @run_migrations
        say_status :running, "migrations"
        quietly { rake 'db:migrate' }
      else
        say_status :skipping, "migrations (don't forget to run rake db:migrate)"
      end
    end

    def populate_seed_data
      if @load_seed_data
        say_status :loading,  "seed data"
        rake_options=[]
        rake_options << "AUTO_ACCEPT=1" if options[:auto_accept]
        rake_options << "ADMIN_EMAIL=#{options[:admin_email]}" if options[:admin_email]
        rake_options << "ADMIN_PASSWORD=#{options[:admin_password]}" if options[:admin_password]

        cmd = lambda { rake("db:seed #{rake_options.join(' ')}") }
        if options[:auto_accept] || (options[:admin_email] && options[:admin_password])
          quietly &cmd
        else
          cmd.call
        end
      else
        say_status :skipping, "seed data (you can always run rake db:seed)"
      end
    end

    def load_sample_data
      if @load_sample_data
        say_status :loading, "sample data"
        quietly { rake 'spree_sample:load' }
      else
        say_status :skipping, "sample data (you can always run rake spree_sample:load)"
      end
    end

    def notify_about_routes
      insert_into_file File.join('config', 'routes.rb'), :after => "Rails.application.routes.draw do\n" do
        %Q{
  # This line mounts Spree's routes at the root of your application.
  # This means, any requests to URLs such as /products, will go to Spree::ProductsController.
  # If you would like to change where this engine is mounted, simply change the :at option to something different.
  #
  # We ask that you don't use the :as option here, as Spree relies on it being the default of "spree"
  mount Spree::Core::Engine, :at => '/'
        }
      end

      unless options[:quiet]
        puts "*" * 50
        puts "We added the following line to your application's config/routes.rb file:"
        puts " "
        puts "    mount Spree::Core::Engine, :at => '/'"
      end
    end

    def complete
      unless options[:quiet]
        puts "*" * 50
        puts "Spree has been installed successfully. You're all ready to go!"
        puts " "
        puts "Enjoy!"
      end
    end
  end
end