package models

import (
	"time"

	"gorm.io/gorm"
)

// UserAnswerRecord 用户答题记录
type UserAnswerRecord struct {
	gorm.Model
	UserID     uint      `gorm:"index;not null" json:"user_id"`     // 用户ID
	QuestionID uint      `gorm:"index;not null" json:"question_id"` // 题目ID
	IsCorrect  bool      `gorm:"not null" json:"is_correct"`        // 是否答对
	AnsweredAt time.Time `gorm:"not null" json:"answered_at"`       // 答题时间
}

// TableName 指定表名
func (UserAnswerRecord) TableName() string {
	return "user_answer_records"
}

// UserStatistics 用户统计数据
type UserStatistics struct {
	TotalQuestions    int     `json:"total_questions"`    // 题库总数
	AnsweredQuestions int     `json:"answered_questions"` // 已答题数
	CorrectAnswers    int     `json:"correct_answers"`    // 答对题数
	Accuracy          float64 `json:"accuracy"`           // 正确率
}