using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

    public class QuestionService

    {

        void Archive(int id)

        {

            var question = GetQuestion(id);

            questin.IsArchived = true;

            categoryService.EnsureNotEmpty(question.categoryId);

        }

    }

    public class CategoryService

    {

        void Archive(int id)

        {

            var cagetory = getCategory(id);

            category.questions.forEach(question => questionService.Archive(question.id))

            sectionService.EnsureNotEmpty(category.sectionId)

        }

        void EnsureNotEmpty(int id)

        {

            var category = getCategory(id);

            if(!category.Questions.Any())

            {

                category.IsArchived = true;

            }

        }

    }

    public class SectionService

    {

        void Archive(int id)

        {

            var section = getSection(id);

            section.Categories.ForEach(category => categoryService.Archive(category.id));

        }

        void EnsureNotEmpty(int id)

        {

            var section = getSection(id);

            if(!section.Categories.Any())

            {

                section.IsArchived = true;

            }

        }

    }

    // facade

    public class TemplteService : IUnitOfWork

    {

        private QuestionService questionService;

        private CategoryService categoryService;

        private SectionService sectionService;

        void ArchiveQuestion(int id)

        {

            this.questionService.Archive(id);

            Save();

        }

        void ArchiveCategory(int id)

        {

            this.questionService.Archive(id);

            Save();

        }

        void ArchiveSection(int id)

        {

            this.questionService.Archive(id);

            Save();

        }

        void Save()

        {

            context.SaveChanges();

        }

    }

}