# frozen_string_literal: true

require 'rails/generators'
require 'rails/version'

module Solidus
  # @private
  class InstallGenerator < Rails::Generators::Base
    CORE_MOUNT_ROUTE = "mount Spree::Core::Engine"

    PAYMENT_METHODS = {
      'paypal' => 'solidus_paypal_commerce_platform',
      'none' => nil,
    }

    class_option :migrate, type: :boolean, default: true, banner: 'Run Solidus 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 :active_storage, type: :boolean, default: Rails.gem_version >= Gem::Version.new("6.1.0"), banner: 'Install ActiveStorage as image attachments handler for products and taxons'
    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 :with_authentication, type: :boolean, default: true
    class_option :enforce_available_locales, type: :boolean, default: nil
    class_option :payment_method,
                 type: :string,
                 enum: PAYMENT_METHODS.keys,
                 default: PAYMENT_METHODS.keys.first,
                 desc: "Indicates which payment method to install."

    def self.source_paths
      paths = superclass.source_paths
      paths << File.expand_path('../templates', "../../#{__FILE__}")
      paths << File.expand_path('../templates', "../#{__FILE__}")
      paths << File.expand_path('templates', __dir__)
      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.tt', 'config/initializers/spree.rb'
    end

    def install_file_attachment
      if options[:active_storage]
        say "Installing Active Storage", :green
        rake 'active_storage:install'
      else
        say "Installing Paperclip", :green
        gsub_file 'config/initializers/spree.rb', "ActiveStorageAttachment", "PaperclipAttachment"
      end
    end

    def additional_tweaks
      return unless File.exist? 'public/robots.txt'

      append_file "public/robots.txt", <<-ROBOTS.strip_heredoc
        User-agent: *
        Disallow: /checkout
        Disallow: /cart
        Disallow: /orders
        Disallow: /user
        Disallow: /account
        Disallow: /api
        Disallow: /password
      ROBOTS
    end

    def setup_assets
      @lib_name = 'spree'

      empty_directory 'app/assets/images'

      %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 <<-RUBY
    # Load application's model / class decorators
    initializer 'spree.decorators' do |app|
      config.to_prepare do
        Dir.glob(Rails.root.join('app/**/*_decorator*.rb')) do |path|
          require_dependency(path)
        end
      end
    end
      RUBY

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

    def plugin_install_preparation
      @plugins_to_be_installed = []
      @plugin_generators_to_run = []
    end

    def install_auth_plugin
      if options[:with_authentication] && (options[:auto_accept] || !no?("
        Solidus has a default authentication extension that uses Devise.
        You can find more info at https://github.com/solidusio/solidus_auth_devise.

        Would you like to install it? (y/n)"))

        @plugins_to_be_installed << 'solidus_auth_devise'
        @plugin_generators_to_run << 'solidus:auth:install'
      end
    end

    def install_payment_method
      name = options[:payment_method]

      unless options[:auto_accept]
        available_names = PAYMENT_METHODS.keys

        name = ask("
  You can select a payment method to be included in the installation process.
  Please select a payment method name:", limited_to: available_names, default: available_names.first)
      end

      gem_name = PAYMENT_METHODS.fetch(name)

      if gem_name
        @plugins_to_be_installed << gem_name
        @plugin_generators_to_run << "#{gem_name}:install"
      end
    end

    def include_seed_data
      append_file "db/seeds.rb", <<-RUBY.strip_heredoc

        Spree::Core::Engine.load_seed if defined?(Spree::Core)
        Spree::Auth::Engine.load_seed if defined?(Spree::Auth)
      RUBY
    end

    def install_migrations
      say_status :copying, "migrations"
      `rake railties:install:migrations`
    end

    def create_database
      say_status :creating, "database"
      rake 'db:create'
    end

    def run_bundle_install_if_needed_by_plugins
      @plugins_to_be_installed.each do |plugin_name|
        gem plugin_name
      end

      bundle_cleanly{ run "bundle install" } if @plugins_to_be_installed.any?
      run "spring stop" if defined?(Spring)

      @plugin_generators_to_run.each do |plugin_generator_name|
        generate "#{plugin_generator_name} --skip_migrations=true"
      end
    end

    def run_migrations
      if @run_migrations
        say_status :running, "migrations"

        rake 'db:migrate VERBOSE=false'
      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]

        rake("db:seed #{rake_options.join(' ')}")
      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"
        rake 'spree_sample:load'
      else
        say_status :skipping, "sample data (you can always run rake spree_sample:load)"
      end
    end

    def install_routes
      routes_file_path = File.join('config', 'routes.rb')
      unless File.read(routes_file_path).include? CORE_MOUNT_ROUTE
        insert_into_file routes_file_path, after: "Rails.application.routes.draw do\n" do
          <<-RUBY
  # This line mounts Solidus'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 Solidus relies on it being the default of "spree"
  #{CORE_MOUNT_ROUTE}, at: '/'

          RUBY
        end
      end

      unless options[:quiet]
        puts "*" * 50
        puts "We added the following line to your application's config/routes.rb file:"
        puts " "
        puts "    #{CORE_MOUNT_ROUTE}, at: '/'"
      end
    end

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

    private

    def bundle_cleanly(&block)
      Bundler.respond_to?(:with_unbundled_env) ? Bundler.with_unbundled_env(&block) : Bundler.with_clean_env(&block)
    end
  end
end