# frozen_string_literal: true

require 'tramway/error'
require 'tramway/class_name_helpers'

class Tramway::ApplicationDecorator
  include ActionView::Helpers
  include ActionView::Context
  include FontAwesome5::Rails::IconHelper
  include Tramway::CopyToClipboardHelper
  include Tramway::Associations::ObjectHelper
  include Tramway::Attributes::ViewHelper
  include Tramway::Concerns::TableBuilder
  include Tramway::ClassNameHelpers

  def initialize(object)
    @object = object
  end

  def name
    object.try(:name) || object.try(:title) || title
  end

  def title
    Tramway::Error.raise_error(
      :tramway, :application_decorator, :title, :please_implement_title,
      class_name: self.class, object_class: object.class
    )
  end

  def present?
    object.present?
  end

  def render(view, **locals)
    view_name = view.split('/').map.with_index do |dir, index|
      if index == view.split('/').length - 1
        "_#{dir}"
      else
        dir
      end
    end.join('/')
    Haml::Engine.new(File.read("#{Rails.root}/app/views/#{view_name}.html.haml")).render(self, locals)
  end

  def listed_state_machines
    nil
  end

  delegate :id, to: :object

  class << self
    include Tramway::Associations::ClassHelper
    include Tramway::Delegating::ClassHelper
    include Tramway::Default::ValuesHelper

    def decorate(object_or_array)
      is_activerecord_relation = object_or_array.class.superclass == ActiveRecord::Relation
      is_activerecord_association_relation = object_or_array.class.to_s.include?('ActiveRecord_AssociationRelation')
      if is_activerecord_relation || is_activerecord_association_relation
        decorated_array = object_or_array.map do |obj|
          new obj
        end
        Tramway::ApplicationDecoratedCollection.new decorated_array, object_or_array
      else
        new object_or_array
      end
    end

    def model_class
      to_s.sub(/Decorator$/, '').constantize
    end

    def model_name
      model_class.try(:model_name)
    end
  end

  def link
    if object.try :file
      object.file.url
    else
      Tramway::Error.raise_error :tramway, :application_decorator, :link, :method_link_uses_file_attribute
    end
  end

  def additional_buttons
    { show: [], index: [] }
  end

  def public_path; end

  def model
    object
  end

  def associations(associations_type)
    object.class.reflect_on_all_associations(associations_type).map do |association|
      association unless association.name == :versions
    end.compact
  end

  include Tramway::Concerns::AttributesDecoratorHelper

  RESERVED_WORDS = ['fields'].freeze

  def attributes
    object.attributes.reduce({}) do |hash, attribute|
      if attribute[0].in? RESERVED_WORDS
        Tramway::Error.raise_error(
          :tramway, :application_decorator, :attributes, :method_is_reserved_word,
          attribute_name: attribute[0], class_name: self.class.name
        )
      end
      hash.merge! attribute[0] => build_viewable_value(object, attribute)
    end
  end

  protected

  attr_reader :object

  def association_class_name; end
end