require 'rails/generators'
require 'rails/generators/rails/app/app_generator'
require 'json'
require 'active_support/core_ext/hash/indifferent_access'

module MobileWorkflow::Cli
  class AppServerGenerator < Rails::Generators::AppGenerator
    hide!    
    class_option :skip_test, type: :boolean, default: true, desc: "Skip Test Unit"
    class_option :force, type: :boolean, default: true, desc: "Force overwrite"
    class_option :skip_webpack_install, type: :boolean, default: true, desc: "Skip webpacker installation"
    
    class_option :version, type: :boolean, aliases: "-v", desc: "Show version number and quit"
    class_option :help, type: :boolean, aliases: '-h', desc: "Show this help message and quit"
    
    class_option :heroku, type: :boolean, default: false, desc: "Create Heroku app"
    
    class_option :dokku, type: :boolean, default: false, desc: "Create Dokku app"
    class_option :dokku_host, type: :string, desc: "Specify the Dokku host machine e.g. 18.131.127.164"
    
    class_option :s3_storage, type: :boolean, default: false, desc: "Create an s3 backend for attachment upload and storage"
    class_option :aws_region, type: :string, default: 'us-east-1', desc: "Specify a region to create AWS resources in"
    
    class_option :doorkeeper_oauth, type: :boolean, default: false, desc: "Use Doorkeeper gem for OAuth login"

    def self.banner
      "mwf rails create:app_server <directory> <OpenAPI Spec file path> [options]"
    end

    def finish_template
      super
      after_bundle do
        run "spring stop"
        build :procfiles
        build :rspec_generator
        build :ability_generator
        build :active_storage if options[:s3_storage] 
        build :mobile_workflow_generator, ARGV[1]
        setup_db
        generate_administrate
        
        generate_dot_env
        initial_git_commit
        
        build :heroku if options[:heroku]
        build :dokku, options[:dokku_host] if options[:dokku]
        build :s3_backend, options[:aws_region] if options[:s3_storage]
      end
    end
    
    protected

    def get_builder_class
      MobileWorkflowCli::AppBuilder
    end
    
    # Todo: MBS - move these methods to the builder class
    # Ideally override RailsBuilder methods
    private
    def generate_administrate
      generate 'administrate:install'
      file 'app/assets/config/manifest.js', <<-CODE
//= link administrate/application.css
//= link administrate/application.js
    CODE
  
      file 'app/controllers/admin/application_controller.rb', <<-CODE
module Admin
  class ApplicationController < Administrate::ApplicationController
    http_basic_authenticate_with(name: ENV["ADMIN_USER"], password: ENV["ADMIN_PASSWORD"])
  end
end
CODE
      generate 'administrate:routes'
    end

    def setup_db
      rails_command "db:drop"
      rails_command "db:create"
      rails_command "db:migrate"
    end

    def initial_git_commit
      git add: "."
      git commit: %Q{ -m 'Initial commit' }
    end

    def generate_dot_env
      admin_user = 'admin'
      admin_password = SecureRandom.base64(12)
      
      file '.env', <<-CODE
ADMIN_USER=#{admin_user}
ADMIN_PASSWORD=#{admin_password}
CODE
    end
  end
end