package model

import "time"

// CardDailyUsage 卡日流量记录模型
// 每卡每天一条记录，由每日落盘任务从 Redis 写入
type CardDailyUsage struct {
	ID        uint      `gorm:"column:id;primaryKey;comment:记录ID" json:"id"`
	IotCardID uint      `gorm:"column:iot_card_id;not null;uniqueIndex:uk_card_daily;comment:IoT卡ID" json:"iot_card_id"`
	Date      time.Time `gorm:"column:date;type:date;not null;uniqueIndex:uk_card_daily;comment:日期" json:"date"`
	UsageMB   float64   `gorm:"column:usage_mb;type:numeric(12,2);not null;default:0;comment:当日流量使用量(MB)" json:"usage_mb"`
	CreatedAt time.Time `gorm:"column:created_at;autoCreateTime;comment:创建时间" json:"created_at"`
	UpdatedAt time.Time `gorm:"column:updated_at;autoUpdateTime;comment:更新时间" json:"updated_at"`
}

func (CardDailyUsage) TableName() string {
	return "tb_card_daily_usage"
}