using SurveyBackend.DTOs.Question;
using SurveyBackend.Services.Exceptions;
using SurveyLib.Core.Models;
using SurveyLib.Core.Models.QuestionVariants;

namespace SurveyBackend.Mappers.QuestionDTOs;

public static class QuestionCreationMapper
{
    public static QuestionBase QuestionCreationToModel(CreateQuestionDTO dto)
    {
        return dto.QuestionType.ToLower() switch
        {
            "text" => new TextQuestion
            {
                Title = dto.Title,
                SurveyId = dto.SurveyId,
            },
            "single" => new SingleAnswerQuestion
            {
                Title = dto.Title,
                SurveyId = dto.SurveyId,
                AnswerVariants = dto.AnswerVariants?.Select(v => new AnswerVariant { Text = v }).ToList() ?? [],
            },
            "multiple" => new MultipleAnswerQuestion
            {
                Title = dto.Title,
                SurveyId = dto.SurveyId,
                AnswerVariants = dto.AnswerVariants?.Select(v => new AnswerVariant { Text = v }).ToList() ?? []
            },
            _ => throw new BadRequestException("Unknown question type")
        };
    }
}