require_relative '../base'

module Analytics
  module Serializer
    class ObjC < Base
      # It's named AnalyticsFile instead of Analytics,
      # because it failed to have a class which used the same name as the parent module.
      class Enums
        def initialize(src)
          @src = src
        end

        def save(path)
          @class_name = 'AnalyticsEnums'

          @file_name = @class_name + '.h'
          output_path = File.join(path, @file_name)
          File.write(output_path, render_h)
        end

        private

        def render_h
          ERB.new(template_h, nil, '-').result(binding)
        end

        def template_h
          <<~TEMPLATE
            <%= ERB.new(Analytics::Templates.tmpl_at('header.erb')).result(binding) %>

            #import <Foundation/Foundation.h>

            NS_ASSUME_NONNULL_BEGIN

            #pragma mark - Analytics Event Enums (AE)
            <% Interactor::Event.all_enum_properties(@src['events']).each do |property| -%>
            <% @enum_name = 'AE' + property['name'].pascal_case -%>

            __swift_unavailable("This enum is only available in ObjC.")
            typedef NS_CLOSED_ENUM(NSInteger, <%= @enum_name %>) {
            <% property['values'].each do |value| -%>
                <%= @enum_name + value.pascal_case %>,
            <% end -%>
            };
            <% end -%>


            #pragma mark - Analytics User Property Enums (AUP)
            <% Interactor::UserProperty.all_enum_user_properties(@src['userProperties']).each do |property| -%>
            <% @enum_name = 'AUP' + property['name'].pascal_case -%>

            __swift_unavailable("This enum is only available in ObjC.")
            typedef NS_CLOSED_ENUM(NSInteger, <%= @enum_name %>) {
            <% property['values'].each do |value| -%>
                <%= @enum_name + value.pascal_case %>,
            <% end -%>
                <%= @enum_name + 'Nil' %>
            };
            <% end -%>

            NS_ASSUME_NONNULL_END
          TEMPLATE
        end
      end
    end
  end
end