require 'rails/generators/migration'

class Spud::ModuleGenerator < ::Rails::Generators::Base
  desc 'Creates a new model, dashboard module, and frontend route'
  argument :module_name, type: :string
  argument :attributes, type: :array, default: [], banner: 'field[:type][:index] field[:type][:index]'

  source_root File.expand_path('../templates', __FILE__)

  def create_module
    install_templates
    install_assets
    inject_code
    create_routes
    create_specs if defined?(RSpec)
    create_model_scopes() if self.behavior == :invoke
  end

  private

  def install_templates
    template 'admin_controller.rb.erb', "app/controllers/admin/#{module_name_formatted}_controller.rb"
    template 'controller.rb.erb', "app/controllers/#{module_name_formatted}_controller.rb"
    template 'assets/module.js.erb', "app/assets/javascripts/#{module_name_formatted}.js"
    template 'assets/admin/module.js.erb', "app/assets/javascripts/admin/#{module_name_formatted}.js"
    template 'views/admin/index.html.erb', "app/views/admin/#{module_name_formatted}/index.html.erb"
    template 'views/admin/show.html.erb', "app/views/admin/#{module_name_formatted}/show.html.erb"
    template 'views/admin/new.html.erb', "app/views/admin/#{module_name_formatted}/new.html.erb"
    template 'views/admin/edit.html.erb', "app/views/admin/#{module_name_formatted}/edit.html.erb"
    template 'views/admin/_form.html.erb', "app/views/admin/#{module_name_formatted}/_form.html.erb"
    template 'views/frontend/index.html.erb', "app/views/#{module_name_formatted}/index.html.erb"
    template 'views/frontend/show.html.erb', "app/views/#{module_name_formatted}/show.html.erb"
  end

  def install_assets
    create_file "app/assets/stylesheets/admin/#{module_name_formatted}.scss",
      "// Place #{module_name} admin styles here\n\n"
    create_file "app/assets/stylesheets/#{module_name_formatted}.scss",
      "// Place #{module_name} styles here\n\n"
  end

  def inject_code
    environment(
      "Spud::Core.config.admin_applications += [{name: '#{module_name_formatted.humanize.titlecase}',
      thumbnail: \"admin/module_icon.png\", url: \"/admin/#{module_name_formatted}\"}]"
    )
    Rails::Generators.invoke 'model', [module_name_formatted.singularize] + attributes, behavior: behavior
    Rails::Generators.invoke 'helper', [module_name], behavior: behavior
    Rails::Generators.invoke 'helper', ["Admin/#{module_name}"], behavior: behavior
  end

  def module_name_formatted
    module_name.pluralize.underscore
  end

  def create_routes
    route <<EOF
namespace :admin do
    resources :#{module_name_formatted}
  end
  resources :#{module_name_formatted}, :only => [:index, :show]
EOF
  end

  def create_specs
    string_attribute = find_first_string_attr()
    Rails::Generators.invoke 'spud:controller_spec',
      ["#{module_name_formatted}", string_attribute, 0],
      behavior: behavior
    Rails::Generators.invoke 'spud:controller_spec',
      ["Admin/#{module_name_formatted}", string_attribute, 1],
      behavior: behavior
  end

  def field_for_attribute(type, name)
    case type
      when 'integer'
        "<%= f.tb_number_field :#{name} %>"
      when 'text'
        "<%= f.tb_text_area :#{name}, rows: 4 %>"
      when 'boolean'
        "<%= f.tb_check_box :#{name} %>"
      when 'date'
        "<%= f.tb_date_select :#{name} %>"
      else
        "<%= f.tb_text_field :#{name} %>"
    end
  end

  def application_name
    Rails.application.class.name.split('::').first.underscore
  end

  def attribute_names
    attributes.collect{ |att| att.split(':')[0] }
  end

  def create_model_scopes
    sort_field = ask('What field would you like to sort by?', default: 'created_at')
    search_field = ask('What field would you like to search by?', default: attributes.first.split(':').first)
    inject_into_file "app/models/#{module_name.singularize.underscore}.rb", after: "ApplicationRecord\n" do <<-RUBY
  scope :ordered, -> { order(#{sort_field}: :desc) }
  scope :search, ->(term) { where('#{search_field} LIKE ?', "%\#{term}%") }
RUBY
    end
  end

  # NOT CURRENTLY USED
  #
  # Call this method from the create_module generator to automatically build length validators for string columns.
  # The idea here is to protect against database exceptions when long strings are entered by a user.
  #
  # Assumes 255 as the default limit
  #
  #
  def add_string_maximums
    string_attrs = attributes.select{ |att| att.split(':')[1] == 'string' }.collect{ |att| att.split(':')[0] }
    if string_attrs.any?
      string_attrs_as_symbols = string_attrs.collect{ |att| ":#{att.to_s}" }.join(', ')
      inject_into_file "app/models/#{module_name.singularize.underscore}.rb", before: 'end' do <<-RUBY

  validates #{string_attrs_as_symbols}, :length => {:maximum => 255}

  RUBY
      end
    end
  end

  def find_first_string_attr
    found = attributes.find{ |att| att.split(':')[1] == 'string' }
    if found
      return found.split(':')[0]
    else
      return 'string_not_found'
    end
  end

end