using SurveyLib.Core.Models;
using SurveyLib.Core.Repositories;
using SurveyLib.Core.Services;

namespace SurveyLib.Infrastructure.EFCore.Services;

public class QuestionService : IQuestionService
{
    private readonly IQuestionRepository _questionRepository;

    public QuestionService(IQuestionRepository questionRepository)
    {
        _questionRepository = questionRepository;
    }

    public async Task AddQuestionAsync(QuestionBase question)
    {
        await _questionRepository.AddAsync(question);
    }

    public async Task UpdateQuestionAsync(QuestionBase question)
    {
        await _questionRepository.UpdateAsync(question);
    }

    public async Task DeleteQuestionAsync(int id)
    {
        var question = await GetQuestionByIdAsync(id);

        await _questionRepository.DeleteAsync(question);
    }

    public async Task<QuestionBase> GetQuestionByIdAsync(int id)
    {
        var question = await _questionRepository.GetByIdAsync(id) ?? throw new NullReferenceException();
        return question;
    }

    public async Task<IEnumerable<QuestionBase>> GetQuestionsBySurveyIdAsync(int surveyId)
    {
        return await _questionRepository.GetQuestionsBySurveyId(surveyId);
    }
}