using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Serialization;

namespace Entities.DTO
{
	public class ExamDto
	{
		public Guid? AssignmentId { get; set; }
		public string CreaterEmail { get; set; }	
		public string AssignmentTitle { get; set; } = string.Empty;
		public string Description { get; set; }
		public string SubjectArea { get; set; }
		public QuestionGroupDto QuestionGroups { get; set; } = new QuestionGroupDto();
	}

	public class QuestionGroupDto
	{
		public byte Index { get; set; } 

		public string? Title { get; set; }

		public float Score { get; set; }

		public string? Descript { get; set; } 
		public List<SubQuestionDto> SubQuestions { get; set; } = new List<SubQuestionDto>();
		public List<QuestionGroupDto> SubQuestionGroups { get; set; } = new List<QuestionGroupDto>();

		// 标记是否是一个具有上下文的单独问题
		public bool ValidQuestionGroup { get; set; } = false;
	}

	public class SubQuestionDto
	{

		public byte Index { get; set; } 

		public string? Stem { get; set; }

		public float Score { get; set; }

		public List<OptionDto> Options { get; set; } = new List<OptionDto>();

		public string? SampleAnswer { get; set; } 

		public string? QuestionType { get; set; } 
		public string? DifficultyLevel { get; set; }

		// 标记是否是一个独立的问题
		public bool ValidQuestion { get; set; } = false;

	}

	public class OptionDto
	{
		public string? Value { get; set; } = string.Empty;
	}


	public static class ExamDtoExtension
	{
		public static void Convert(this ExamDto examDto)
		{
			var qg = examDto.QuestionGroups;

		}

		public static void Convert(this QuestionGroupDto examDto)
		{
			if(examDto.ValidQuestionGroup)
			{

			}

		}
	}

}