package model

import "time"

// Event 通用事件模型
// 关联: spec §2.2 + plan Task 4
type Event struct {
	EventID    string            `json:"event_id"`
	UserID     int64             `json:"user_id"`
	StarID     int64             `json:"star_id"`
	EventType  string            `json:"event_type"`
	OccurredAt time.Time         `json:"occurred_at"`
	ReceivedAt time.Time         `json:"received_at"`
	Properties map[string]string `json:"properties"`
}

// ToJSON 序列化为 map（用于日志/调试/Redis 缓存）
// 时间字段转为毫秒时间戳（与 proto event.proto 字段类型一致）
func (e *Event) ToJSON() map[string]interface{} {
	props := e.Properties
	if props == nil {
		props = map[string]string{}
	}
	return map[string]interface{}{
		"event_id":    e.EventID,
		"user_id":     e.UserID,
		"star_id":     e.StarID,
		"event_type":  e.EventType,
		"occurred_at": e.OccurredAt.UnixMilli(),
		"received_at": e.ReceivedAt.UnixMilli(),
		"properties":  props,
	}
}