package models

import "time"

// SaAIRateBucket 保存用户在固定窗口内已占用的 AI 请求配额。
// 复合唯一键让单条 UPSERT 在数据库层完成跨进程并发仲裁。
type SaAIRateBucket struct {
	ID          uint      `gorm:"primaryKey"`
	UserID      uint      `gorm:"not null;uniqueIndex:uidx_sa_ai_rate_bucket,priority:1"`
	Action      string    `gorm:"size:100;not null;uniqueIndex:uidx_sa_ai_rate_bucket,priority:2"`
	WindowStart time.Time `gorm:"not null;uniqueIndex:uidx_sa_ai_rate_bucket,priority:3"`
	Count       int       `gorm:"not null"`
	CreatedAt   time.Time
	UpdatedAt   time.Time
}

func (SaAIRateBucket) TableName() string {
	return "sa_ai_rate_buckets"
}