package sessionmanager

import (
	"fmt"
	"log"

	"git.andreafazzi.eu/andrea/probo/lib/models"
	"git.andreafazzi.eu/andrea/probo/lib/store/file"
)

type Score struct {
	Exam  *models.Exam
	Score float32
}

type Scores []*Score

func NewScores(responseFileStore *file.ResponseFileStore, session *models.Session) (Scores, error) {
	var scores Scores

	for _, exam := range session.Exams {
		response, err := responseFileStore.Read(exam.ID)
		if err != nil {
			log.Println(err)
			continue
		}
		scores = append(scores, CalcScore(response, exam))
	}

	return scores, nil
}

func (ss Scores) String() string {
	var result string

	for _, s := range ss {
		result += fmt.Sprintf("%v\t%f\n", s.Exam.Participant, s.Score)
	}

	return result
}

func CalcScore(response *models.Response, exam *models.Exam) *Score {
	var score float32
	for _, q := range exam.Quizzes {
		answerId := response.Questions[q.Question.ID]
		if answerId == q.Correct.ID {
			score++
		}
	}
	return &Score{exam, score}
}