/*
 * ClinicalEventBus — 임상 이벤트 중앙 브로드캐스트 (SSOT).
 * (GUARDIAN-01 §3-3 · 2026-08-03 · cloud-mvp 6856a7b 이식)
 *
 * fire-and-forget · emit 실패해도 필수기능 영향 X.
 */
package com.medithings.vesiscan.telemetry

import android.util.Log
import kotlinx.coroutines.channels.BufferOverflow
import kotlinx.coroutines.flow.MutableSharedFlow
import kotlinx.coroutines.flow.SharedFlow
import kotlinx.coroutines.flow.asSharedFlow

object ClinicalEventBus {
    private const val TAG = "ClinicalEventBus"

    private val _events = MutableSharedFlow<ClinicalEvent>(
        replay = 0,
        extraBufferCapacity = 64,
        onBufferOverflow = BufferOverflow.DROP_OLDEST,
    )
    val events: SharedFlow<ClinicalEvent> = _events.asSharedFlow()

    fun emit(event: ClinicalEvent) {
        try {
            val delivered = _events.tryEmit(event)
            if (!delivered) {
                Log.w(TAG, "buffer full · dropped: ${event.javaClass.simpleName}")
            }
        } catch (e: Exception) {
            Log.w(TAG, "emit failed: ${e.message}")
        }
    }
}