using SqlSugar;
using Tiobon.Core.Model.Models;

namespace Tiobon.Core.Common.Helper;

public class ExamHelper
{
    public static async Task SystemMarkAsync(ISqlSugarClient Db, Ghre_ExamRecord record, List<Ghre_ExamRecordDetail> details)
    {
        var questionIds = details.Where(x => x.QuestionId != null).Select(m => m.QuestionId).Distinct().ToList();

        var exampaperQuestions = await Db.Queryable<Ghre_ExamPaperQuestion>().Where(x => x.ExamPaperId == record.ExamPaperId).ToListAsync();
        var questions = await Db.Queryable<Ghre_Question>().Where(x => questionIds.Contains(x.Id)).ToListAsync();
        var answers = await Db.Queryable<Ghre_QuestionAnswer>().Where(x => x.QuestionId != null && questionIds.Contains(x.QuestionId.Value) && x.IsCorrect == true).ToListAsync();
        decimal? score = 0;

        var detailGroups = details.GroupBy(m => m.QuestionId)
            .Select(m => new
            {
                m.FirstOrDefault()?.QuestionId,
                List = m.OrderBy(x => x.TaxisNo).ToList()
            })
           .ToList();

        detailGroups.ForEach(group =>
        {
            var question = questions.FirstOrDefault(x => x.Id == group.QuestionId);
            var detail = details.Where(x => x.QuestionId == group.QuestionId).First();
            detail.IsCorrect = false;
            detail.Score = 0;

            switch (question.QuestionType)
            {
                case "Completion":
                    var completionAnswers = answers.OrderBy(x => x.TaxisNo).Where(x => x.QuestionId == group.QuestionId).ToList();
                    var contents = group.List.Select(x => x.AnswerContent).ToList();
                    var count = completionAnswers.Count;
                    if (contents.Count == count)
                    {
                        for (int i = 0; i < completionAnswers.Count; i++)
                            if (completionAnswers[i].AnswerContent == contents[i])
                                count--;

                        if (count == 0)
                        {
                            var exampaperQuestion = exampaperQuestions.FirstOrDefault(x => x.QuestionId == group.QuestionId);
                            score += exampaperQuestion.Score;
                            detail.Score = exampaperQuestion.Score;
                            detail.IsCorrect = true;
                        }
                    }
                    break;
                case "ShortAnswer":
                    if (!string.IsNullOrWhiteSpace(group.List.First().AnswerContent))
                    {
                        var completionAnswers1 = answers.OrderBy(x => x.TaxisNo).Where(x => x.QuestionId == group.QuestionId).ToList();
                        var content = group.List.First().AnswerContent;
                        var count1 = completionAnswers1.Count;

                        for (int i = 0; i < completionAnswers1.Count; i++)
                            if (content.IndexOf(completionAnswers1[i].AnswerContent) > -1)
                                count1--;

                        if (count1 == 0)
                        {
                            var exampaperQuestion = exampaperQuestions.FirstOrDefault(x => x.QuestionId == group.QuestionId);
                            score += exampaperQuestion.Score;
                            detail.Score = exampaperQuestion.Score;
                            detail.IsCorrect = true;
                        }
                    }

                    break;
                default:
                    var questionAnswerIds = group.List.Where(x => x.QuestionId != null).Select(m => m.QuestionAnswerId).ToList();

                    if (questionAnswerIds.Count == answers.Where(x => questionAnswerIds.Contains(x.Id)).Count())
                    {
                        var exampaperQuestion = exampaperQuestions.FirstOrDefault(x => x.QuestionId == group.QuestionId);
                        score += exampaperQuestion.Score;
                        detail.Score = exampaperQuestion.Score;
                        detail.IsCorrect = true;
                    }
                    break;
            }
        });
        record.Score = score;

    }
}