// 創(chuàng)建監(jiān)控探頭
val deliveryMonitor = object : MessageQueue.IdleHandler {
    override fun queueIdle(): Boolean {
        // 當(dāng)快遞員停下腳步時(shí)...
        loadOfflineMessages()    // 偷偷塞點(diǎn)離線消息
        preloadNextPageContent() // 提前準(zhǔn)備下一頁(yè)內(nèi)容
        return true              // 保持持續(xù)監(jiān)控（false表示只監(jiān)控一次）
    }
}

// 安裝到主線程快遞站
Looper.getMainLooper().queue.addIdleHandler(deliveryMonitor)

// 需要時(shí)卸載監(jiān)控
fun removeMonitor() {
    Looper.getMainLooper().queue.removeIdleHandler(deliveryMonitor)
}

// 智能等待函數(shù)（帶超時(shí)提醒）
suspend fun waitForBreakTime(timeoutMs: Long = 3000) = coroutineScope {
    val job = launch(Dispatchers.Main) {
        val coffeeBreakDetector = object : MessageQueue.IdleHandler {
            override fun queueIdle(): Boolean {
                cancel() // 發(fā)現(xiàn)休息立即取消等待
                return false
            }
        }
        
        Looper.getMainLooper().queue.addIdleHandler(coffeeBreakDetector)
        try {
            delay(timeoutMs) // 啟動(dòng)3秒倒計(jì)時(shí)
        } finally {
            Looper.getMainLooper().queue.removeIdleHandler(coffeeBreakDetector)
        }
    }
    
    job.join() // 等待檢測(cè)結(jié)果
}

// 場(chǎng)景：用戶停止滑動(dòng)列表后預(yù)加載
fun onScrollStateChanged(state: Int) {
    when (state) {
        SCROLL_STATE_IDLE -> {
            viewModelScope.launch {
                // 等待真正的空閑時(shí)刻（最多等2秒）
                if (waitForBreakTime(2000)) {
                    prefetchNextBatch() // 預(yù)加載下批數(shù)據(jù)
                    warmupImageCache()   // 預(yù)熱圖片緩存
                }
            }
        }
    }
}

override fun onDestroy() {
    Looper.getMainLooper().queue.removeIdleHandler(mIdleHandler)
    super.onDestroy()
}

val taskQueue = PriorityQueue<Task>(compareBy { it.priority })

val handler = IdleHandler {
    while (!taskQueue.isEmpty() && hasTime()) {
        execute(taskQueue.poll())
    }
    true // 保持持續(xù)處理
}

val performanceTracer = IdleHandler {
    Log.d("Perf", "空閑時(shí)段處理了${taskCount}個(gè)任務(wù)")
    true
}

class UsagePatternAnalyzer {
    // 記錄每次空閑時(shí)段時(shí)長(zhǎng)
    private val idleDurations = mutableListOf<Long>()
    
    fun predictNextIdleDuration(): Long {
        return idleDurations.average().toLong()
    }
    
    fun trackIdlePeriod(duration: Long) {
        idleDurations.add(duration)
    }
}