/**
 * 设备详情页：进入/回到页面时启动定时器，每 5s 调用 getxq() 拉取详情；
 * 隐藏、卸载或切换离开页面时清除定时器。
 */
const POLL_INTERVAL_MS = 5000

export default {
	data() {
		return {
			_deviceDetailPollTimer: null,
		}
	},
	onShow() {
		this._startDeviceDetailPoll()
	},
	onHide() {
		this._stopDeviceDetailPoll()
	},
	onUnload() {
		this._stopDeviceDetailPoll()
	},
	onBeforeUnmount() {
		this._stopDeviceDetailPoll()
	},
	methods: {
		_startDeviceDetailPoll() {
			this._stopDeviceDetailPoll()
			if (typeof this.getxq !== 'function') return
			if (this.id === '' || this.id === null || this.id === undefined) return
			this._deviceDetailPollTimer = setInterval(() => {
				if (typeof this.getxq !== 'function') return
				if (this.id === '' || this.id === null || this.id === undefined) return
				this.getxq()
			}, POLL_INTERVAL_MS)
		},
		_stopDeviceDetailPoll() {
			if (this._deviceDetailPollTimer != null) {
				clearInterval(this._deviceDetailPollTimer)
				this._deviceDetailPollTimer = null
			}
		},
	},
}