package api

// The owner shapes of the manage routes. They carry the solutions
// (is_correct, explanations, answer_text) and are never used by a student
// route; the student shapes live in json.go. Built field by field, so a new
// column never leaks.

import (
	"git.golem15.com/golem15/sm-quizzes-plugin/classes"
	"git.golem15.com/golem15/sm-quizzes-plugin/graders"
	"git.golem15.com/golem15/sm-quizzes-plugin/models"
	"git.golem15.com/golem15/summercms/modules/wire"
)

type managedQuizJSON struct {
	ID               uint      `json:"id"`
	Slug             string    `json:"slug"`
	Title            string    `json:"title"`
	Description      *string   `json:"description"`
	Context          *string   `json:"context"`
	Mode             string    `json:"mode"`
	Navigation       string    `json:"navigation"`
	MaxAttempts      *int      `json:"max_attempts"`
	TimeLimitSeconds *int      `json:"time_limit_seconds"`
	PassingScore     int       `json:"passing_score"`
	ShuffleQuestions bool      `json:"shuffle_questions"`
	RoundSize        *int      `json:"round_size"`
	Grader           string    `json:"grader"`
	IsPublished      bool      `json:"is_published"`
	QuestionCount    int       `json:"question_count"`
	AttemptsCount    int       `json:"attempts_count"`
	CreatedAt        wire.Time `json:"created_at"`
	UpdatedAt        wire.Time `json:"updated_at"`
}

type managedQuizDetailJSON struct {
	managedQuizJSON
	Questions []managedQuestionJSON `json:"questions"`
}

type managedQuestionJSON struct {
	ID          uint                `json:"id"`
	Text        string              `json:"text"`
	Type        string              `json:"type"`
	Category    *string             `json:"category"`
	AnswerText  *string             `json:"answer_text"`
	Explanation *string             `json:"explanation"`
	Points      int                 `json:"points"`
	SortOrder   int                 `json:"sort_order"`
	Rubric      *string             `json:"rubric"`
	MaxLength   *int                `json:"max_length"`
	Answers     []managedAnswerJSON `json:"answers"`
}

type managedAnswerJSON struct {
	ID          uint    `json:"id"`
	Text        string  `json:"text"`
	IsCorrect   bool    `json:"is_correct"`
	Explanation *string `json:"explanation"`
	SortOrder   int     `json:"sort_order"`
}

func managedQuiz(q models.Quiz, questions, attempts int) managedQuizJSON {
	return managedQuizJSON{
		ID:               q.ID,
		Slug:             q.Slug,
		Title:            q.Title,
		Description:      q.Description,
		Context:          q.Context,
		Mode:             quizMode(&q),
		Navigation:       quizNavigation(&q),
		MaxAttempts:      q.MaxAttempts,
		TimeLimitSeconds: q.TimeLimitSeconds,
		PassingScore:     q.PassingScore,
		ShuffleQuestions: q.ShuffleQuestions,
		RoundSize:        q.RoundSize,
		Grader:           quizGrader(&q),
		IsPublished:      q.IsPublished,
		QuestionCount:    questions,
		AttemptsCount:    attempts,
		CreatedAt:        wireTime(q.CreatedAt),
		UpdatedAt:        wireTime(q.UpdatedAt),
	}
}

func managedQuizRow(row classes.ManagedQuizRow) managedQuizJSON {
	return managedQuiz(row.Quiz, row.QuestionCount, row.AttemptsCount)
}

// managedQuizDetail is a quiz loaded by classes.ManagedQuiz with its
// questions; attempts is its completed-attempt count.
func managedQuizDetail(q models.Quiz, attempts int) managedQuizDetailJSON {
	out := managedQuizDetailJSON{
		managedQuizJSON: managedQuiz(q, len(q.Questions), attempts),
		Questions:       make([]managedQuestionJSON, 0, len(q.Questions)),
	}
	for _, question := range q.Questions {
		out.Questions = append(out.Questions, managedQuestion(question))
	}
	return out
}

func managedQuestion(q models.Question) managedQuestionJSON {
	out := managedQuestionJSON{
		ID:          q.ID,
		Text:        q.Text,
		Type:        q.Type,
		Category:    q.Category,
		AnswerText:  q.AnswerText,
		Explanation: q.Explanation,
		Points:      q.Points,
		SortOrder:   q.SortOrder,
		Rubric:      q.Rubric,
		MaxLength:   q.MaxLength,
		Answers:     make([]managedAnswerJSON, 0, len(q.Answers)),
	}
	for _, a := range q.Answers {
		out.Answers = append(out.Answers, managedAnswerJSON{
			ID: a.ID, Text: a.Text, IsCorrect: a.IsCorrect, Explanation: a.Explanation, SortOrder: a.SortOrder,
		})
	}
	return out
}

type statsJSON struct {
	Quiz       statsQuizJSON      `json:"quiz"`
	Unreviewed int                `json:"unreviewed"`
	Students   []studentStatJSON  `json:"students"`
	Questions  []questionStatJSON `json:"questions"`
}

type statsQuizJSON struct {
	ID            uint   `json:"id"`
	Slug          string `json:"slug"`
	Title         string `json:"title"`
	Mode          string `json:"mode"`
	PassingScore  int    `json:"passing_score"`
	QuestionCount int    `json:"question_count"`
}

type studentStatJSON struct {
	UserID           uint       `json:"user_id"`
	Email            string     `json:"email"`
	Name             *string    `json:"name"`
	Surname          *string    `json:"surname"`
	Attempts         int        `json:"attempts"`
	BestScorePercent *float64   `json:"best_score_percent"`
	LastScorePercent *float64   `json:"last_score_percent"`
	LastCompletedAt  *wire.Time `json:"last_completed_at"`
	Passed           bool       `json:"passed"`
}

type questionStatJSON struct {
	ID              uint             `json:"id"`
	Text            string           `json:"text"`
	Type            string           `json:"type"`
	Answered        int              `json:"answered"`
	Correct         int              `json:"correct"`
	CorrectPercent  *float64         `json:"correct_percent"`
	MostChosenWrong *wrongAnswerJSON `json:"most_chosen_wrong"`
	Unreviewed      int              `json:"unreviewed"`
	AveragePoints   *float64         `json:"average_points"`
}

type wrongAnswerJSON struct {
	AnswerID uint   `json:"answer_id"`
	Text     string `json:"text"`
	Count    int    `json:"count"`
}

func quizStats(s *classes.Stats) statsJSON {
	out := statsJSON{
		Quiz: statsQuizJSON{
			ID: s.Quiz.ID, Slug: s.Quiz.Slug, Title: s.Quiz.Title, Mode: quizMode(&s.Quiz),
			PassingScore: s.Quiz.PassingScore, QuestionCount: s.QuestionCount,
		},
		Unreviewed: s.Unreviewed,
		Students:   make([]studentStatJSON, 0, len(s.Students)),
		Questions:  make([]questionStatJSON, 0, len(s.Questions)),
	}
	for _, st := range s.Students {
		row := studentStatJSON{
			UserID: st.UserID, Email: st.Email, Name: st.Name, Surname: st.Surname, Attempts: st.Attempts,
			BestScorePercent: st.BestScorePercent, LastScorePercent: st.LastScorePercent, Passed: st.Passed,
		}
		if st.LastCompletedAt != nil {
			t := wireTime(*st.LastCompletedAt)
			row.LastCompletedAt = &t
		}
		out.Students = append(out.Students, row)
	}
	for _, q := range s.Questions {
		row := questionStatJSON{
			ID: q.ID, Text: q.Text, Type: q.Type, Answered: q.Answered, Correct: q.Correct, CorrectPercent: q.CorrectPercent,
			Unreviewed: q.Unreviewed, AveragePoints: q.AveragePoints,
		}
		if q.MostChosenWrong != nil {
			row.MostChosenWrong = &wrongAnswerJSON{AnswerID: q.MostChosenWrong.AnswerID, Text: q.MostChosenWrong.Text, Count: q.MostChosenWrong.Count}
		}
		out.Questions = append(out.Questions, row)
	}
	return out
}

// quizGrader is the quiz's grader code, manual for a quiz read before the
// column had a value.
func quizGrader(q *models.Quiz) string {
	if q.Grader == "" {
		return graders.Manual
	}
	return q.Grader
}