using System.Collections.Generic;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.QueryExecutor;
using GB5Shared.Resource.Response;
using GB5Shared.Validation;
using Newtonsoft.Json;
using TMSDAL.DTO.Assessment;
using TMSDAL.DTO.Quiz;
using TMSDAL.Query.Quiz;

namespace TMSDAL.CustomCode.Quiz
{
    public class QuizSectionDAL : IQuizSectionDAL
    {
        private readonly IQueryExecutor _QueryExecutor;
        private readonly IValidation _Validation;

        public QuizSectionDAL(IQueryExecutor queryExecutor, IValidation validation)
        {
            _QueryExecutor = queryExecutor;
            _Validation = validation;
        }

        public async Task<string> GetQuizSection(int quizSectionId, LoginDTO loginDTO)
        {
            try
            {
                var parameters = new { QuizSectionId = quizSectionId };
                var result = await _QueryExecutor.QuerySingleAsync<QuizSectionDTO>(loginDTO, QuizSectionQB.GET_QUIZSECTION, parameters);
                return JsonConvert.SerializeObject(result);
            }
            catch (Exception) { throw; }
        }

        public async Task<string> GetQuizSectionList(int quizId, LoginDTO loginDTO)
        {
            try
            {
                var parameters = new { QuizId = quizId };
                var result = await _QueryExecutor.QueryAsync<QuizSectionDTO>(loginDTO, QuizSectionQB.GET_QUIZSECTION_LIST, parameters);
                return JsonConvert.SerializeObject(result);
            }
            catch (Exception) { throw; }
        }

        public async Task<int> SaveQuizSection(QuizSectionDTO dto, LoginDTO loginDTO)
        {
            try
            {
                return await _QueryExecutor.ExecuteAsync(loginDTO, QuizSectionQB.SAVE_QUIZSECTION, dto);
            }
            catch (Exception ex)
            {
                string error = await _Validation.HandleException(ex, ErrorResponse.SaveErrorMessage);
                throw new Exception(error);
            }
        }

        public async Task<int> UpdateQuizSection(QuizSectionDTO dto, LoginDTO loginDTO)
        {
            try
            {
                return await _QueryExecutor.ExecuteAsync(loginDTO, QuizSectionQB.UPDATE_QUIZSECTION, dto);
            }
            catch (Exception ex)
            {
                string error = await _Validation.HandleException(ex, ErrorResponse.UpdateErrorMessage);
                throw new Exception(error);
            }
        }

        public async Task<string> DeleteQuizSection(int quizSectionId, LoginDTO loginDTO)
        {
            try
            {
                var parameters = new { QuizSectionId = quizSectionId };
                int rowsAffected = await _QueryExecutor.ExecuteAsync(loginDTO, QuizSectionQB.DELETE_QUIZSECTION, parameters);
                return rowsAffected > 0 ? SuccessResponse.DeleteSuccessMessage : ErrorResponse.DeleteNotFoundMessage;
            }
            catch (Exception ex)
            {
                string error = await _Validation.HandleException(ex, ErrorResponse.DeleteErrorMessage);
                throw new Exception(error);
            }
        }

        public async Task<string> DeleteQuizSectionsByQuiz(int quizId, LoginDTO loginDTO)
        {
            try
            {
                var parameters = new { QuizId = quizId };
                int rowsAffected = await _QueryExecutor.ExecuteAsync(loginDTO, QuizSectionQB.DELETE_QUIZSECTIONS_BY_QUIZ, parameters);
                return rowsAffected > 0 ? SuccessResponse.DeleteSuccessMessage : ErrorResponse.DeleteNotFoundMessage;
            }
            catch (Exception ex)
            {
                string error = await _Validation.HandleException(ex, ErrorResponse.DeleteErrorMessage);
                throw new Exception(error);
            }
        }

        public async Task<string> GetQuestionsForQuizSection(int quizSectionId, LoginDTO loginDTO)
        {
            try
            {
                var sectionParams = new { QuizSectionId = quizSectionId };
                var section = await _QueryExecutor.QuerySingleAsync<QuizSectionDTO>(loginDTO, QuizSectionQB.GET_QUIZSECTION, sectionParams);

                if (section == null)
                    return JsonConvert.SerializeObject(new List<QuestionBankItemDTO>());

                var questionParams = new
                {
                    TenantId = loginDTO.ClientId,
                    QuestionCount = (int)section.QuestionCount,
                    QuestionTypeFilter = section.QuestionTypeFilter,
                    DifficultyFilter = section.DifficultyFilter,
                    IndustryTagFilter = section.IndustryTagFilter,
                    TopicIdFilter = section.TopicIdFilter
                };

                var questions = await _QueryExecutor.QueryAsync<QuestionBankItemDTO>(loginDTO, QuizSectionQB.GET_QUESTIONS_FOR_QUIZSECTION, questionParams);
                return JsonConvert.SerializeObject(questions);
            }
            catch (Exception) { throw; }
        }
    }
}