package main

import (
	"encoding/json"
	"strings"
	"time"

	"github.com/tinode/chat/server/logs"
	"github.com/tinode/chat/server/store/types"
)

func publishIMGroupRealtimeEvent(tenantID types.TenantID, topic string, actor types.Uid, eventType string, payload any) {
	topic = strings.TrimSpace(topic)
	eventType = strings.TrimSpace(eventType)
	if tenantID.IsZero() || topic == "" || eventType == "" {
		return
	}
	encoded, err := json.Marshal(payload)
	if err != nil {
		logs.Warn.Printf("group realtime: encode event topic=%s event=%s: %v", topic, eventType, err)
		encoded = []byte(`{}`)
	}
	from := ""
	if !actor.IsZero() {
		from = actor.UserId()
	}
	message := &ServerComMessage{
		TenantID:  tenantID,
		RcptTo:    topic,
		AsUser:    from,
		Timestamp: time.Now().UTC().Round(time.Millisecond),
		Info: &MsgServerInfo{
			Topic:   topic,
			From:    from,
			What:    "group",
			Event:   eventType,
			Payload: json.RawMessage(encoded),
		},
	}
	if globals.hub != nil {
		select {
		case globals.hub.routeSrv <- message:
		default:
			logs.Warn.Printf("group realtime: hub queue full topic=%s event=%s", topic, eventType)
		}
	}
	publishRealtimeTopicMessage(topic, message)
}

func userIDs(uids []types.Uid) []string {
	ids := make([]string, 0, len(uids))
	for _, uid := range uids {
		if !uid.IsZero() {
			ids = append(ids, uid.UserId())
		}
	}
	return ids
}