package main

import (
	"encoding/json"

	"github.com/mattermost/mattermost/server/public/model"
)

// broadcastUpdate sends a WebSocket event to all clients viewing the given channel.
// The event is auto-prefixed by the SDK to "custom_com.openclaw.livestatus_update".
// All values must be gob-serializable primitives (string, int64, []string, etc.).
// Complex types like []SessionData must be JSON-encoded to a string first.
func (p *Plugin) broadcastUpdate(channelID string, data SessionData) {
	// Serialize children to JSON string — gob cannot encode []SessionData
	var childrenJSON string
	if len(data.Children) > 0 {
		b, err := json.Marshal(data.Children)
		if err == nil {
			childrenJSON = string(b)
		}
	}

	payload := map[string]interface{}{
		"post_id":       data.PostID,
		"session_key":   data.SessionKey,
		"agent_id":      data.AgentID,
		"status":        data.Status,
		"lines":         data.Lines,
		"elapsed_ms":    data.ElapsedMs,
		"token_count":   data.TokenCount,
		"children_json": childrenJSON,
		"start_time_ms": data.StartTimeMs,
	}

	p.API.PublishWebSocketEvent("update", payload, &model.WebsocketBroadcast{
		ChannelId: channelID,
	})
}