/**
 * 设备详情页：仅监听全局长连接推送并合入展示；不在此页 subscribe / unsubscribe。
 * 列表侧（DeviceTab）在设备 Tab 内保持订阅，从列表进详情不会触发列表退订。
 */
import { connectIfLoggedIn } from '@/common/utils/appUserWs.js'

function normalizeMac(m) {
	if (m === undefined || m === null) return ''
	return String(m).replace(/:/g, '').trim().toUpperCase()
}

function pickDeviceRecord(vm) {
	if (vm.xqobj && typeof vm.xqobj === 'object' && Object.keys(vm.xqobj).length) {
		return vm.xqobj
	}
	if (vm.sbobj && typeof vm.sbobj === 'object' && Object.keys(vm.sbobj).length) {
		return vm.sbobj
	}
	return null
}

function mergeIotDataPoint(ov, nv) {
	if (nv === null) return null
	if (typeof nv !== 'object' || Array.isArray(nv)) {
		return nv
	}
	if (!ov || typeof ov !== 'object' || Array.isArray(ov)) {
		return { ...nv }
	}
	const merged = { ...ov, ...nv }
	// 长连接 patch 里若带 value: undefined 或缺省，不要冲掉 HTTP 里已有 value/desc
	if (Object.prototype.hasOwnProperty.call(nv, 'value') && nv.value === undefined) {
		if (Object.prototype.hasOwnProperty.call(ov, 'value') && ov.value !== undefined) {
			merged.value = ov.value
		}
	}
	if (!Object.prototype.hasOwnProperty.call(nv, 'desc') || nv.desc === undefined || nv.desc === '') {
		if (Object.prototype.hasOwnProperty.call(ov, 'desc') && ov.desc !== undefined && ov.desc !== '') {
			merged.desc = ov.desc
		}
	}
	return merged
}

export default {
	data() {
		return {
			deviceUserWsPageActive: false,
			_deviceWsIotPartials: {},
		}
	},
	onLoad() {
		this._deviceWsIotPartials = {}
	},
	computed: {
		_deviceMacForWs() {
			const r = pickDeviceRecord(this)
			const m = r && r.mac
			return m ? String(m).trim() : ''
		},
	},
	onShow() {
		this.deviceUserWsPageActive = true
		connectIfLoggedIn()
		uni.$off('appWs:deviceData', this._onAppWsDeviceData)
		uni.$off('appWs:deviceOnlineStatus', this._onAppWsDeviceOnlineStatus)
		uni.$on('appWs:deviceData', this._onAppWsDeviceData)
		uni.$on('appWs:deviceOnlineStatus', this._onAppWsDeviceOnlineStatus)
	},
	onHide() {
		uni.$off('appWs:deviceData', this._onAppWsDeviceData)
		uni.$off('appWs:deviceOnlineStatus', this._onAppWsDeviceOnlineStatus)
		this._leaveDeviceUserWs()
	},
	onUnload() {
		uni.$off('appWs:deviceData', this._onAppWsDeviceData)
		uni.$off('appWs:deviceOnlineStatus', this._onAppWsDeviceOnlineStatus)
		this._leaveDeviceUserWs()
	},
	onBeforeUnmount() {
		uni.$off('appWs:deviceData', this._onAppWsDeviceData)
		uni.$off('appWs:deviceOnlineStatus', this._onAppWsDeviceOnlineStatus)
		this._leaveDeviceUserWs()
	},
	methods: {
		_onAppWsDeviceData(msg) {
			if (!this.deviceUserWsPageActive) return
			if (!msg || msg.event !== 'device_data') return
			const outer = msg.data
			if (!outer || typeof outer !== 'object') return
			const myMac = normalizeMac(this._deviceMacForWs)
			if (!myMac) return
			const inner = outer.data
			if (!inner || typeof inner !== 'object') return
			const payloadMac = normalizeMac(inner.mac != null ? inner.mac : outer.mac)
			if (payloadMac && payloadMac !== myMac) return
			const patch = inner.data !== undefined ? inner.data : inner
			if (!patch || typeof patch !== 'object') return
			this._applyDeviceDataPatch(patch)
		},
		_onAppWsDeviceOnlineStatus(msg) {
			if (!this.deviceUserWsPageActive) return
			if (!msg || msg.event !== 'device_online_status') return
			const outer = msg.data
			if (!outer || typeof outer !== 'object') return
			const myMac = normalizeMac(this._deviceMacForWs)
			if (!myMac) return
			const inner = outer.data
			if (!inner || typeof inner !== 'object') return
			const payloadMac = normalizeMac(inner.mac != null ? inner.mac : outer.mac)
			if (payloadMac && payloadMac !== myMac) return
			const statusPayload =
				inner.data !== undefined && typeof inner.data === 'object' ? inner.data : inner
			this._applyDeviceOnlinePatch(statusPayload)
		},
		_applyDeviceDataPatch(patch) {
			const rec = pickDeviceRecord(this)
			if (!rec) return
			if (!rec.iotData) {
				this.$set(rec, 'iotData', {})
			}
			const keys = Object.keys(patch).filter((k) => k !== 'mac')
			let any = false
			for (const k of keys) {
				const nv = patch[k]
				const ov = rec.iotData[k]
				const prevP = this._deviceWsIotPartials[k]
				const pMerged =
					typeof nv === 'object' && nv !== null && !Array.isArray(nv)
						? mergeIotDataPoint(prevP || null, nv)
						: mergeIotDataPoint(prevP || null, { value: nv })
				this.$set(this._deviceWsIotPartials, k, pMerged)
				const nextVal =
					nv !== null && typeof nv === 'object' && !Array.isArray(nv)
						? mergeIotDataPoint(ov, nv)
						: nv
				if (JSON.stringify(ov) === JSON.stringify(nextVal)) continue
				this.$set(rec.iotData, k, nextVal)
				any = true
			}
			if (any && typeof this._afterDeviceUserWsData === 'function') {
				this._afterDeviceUserWsData()
			}
		},
		_applyDeviceOnlinePatch(inner) {
			const rec = pickDeviceRecord(this)
			if (!rec) return
			const os = inner.onlineStatus
			const lot = inner.lastOnlineTime
			let changed = false
			if (os !== undefined && os !== null && os !== '') {
				const n = Number(os)
				if (!Number.isNaN(n) && rec.onlineStatus !== n) {
					this.$set(rec, 'onlineStatus', n)
					changed = true
				}
			}
			if (lot !== undefined && lot !== null && rec.lastOnlineTime !== lot) {
				this.$set(rec, 'lastOnlineTime', lot)
				changed = true
			}
			if (!rec.iotOnlineData) {
				this.$set(rec, 'iotOnlineData', {})
			}
			if (os !== undefined && os !== null && os !== '') {
				const s = String(os)
				if (rec.iotOnlineData.onlineStatus !== s) {
					this.$set(rec.iotOnlineData, 'onlineStatus', s)
					changed = true
				}
			}
			if (changed && typeof this._afterDeviceUserWsData === 'function') {
				this._afterDeviceUserWsData()
			}
		},
		_leaveDeviceUserWs() {
			this.deviceUserWsPageActive = false
		},
		reapplyDeviceWsIotToHttpIotData() {
			const rec = pickDeviceRecord(this)
			if (!rec || !this._deviceWsIotPartials) return
			const pkeys = Object.keys(this._deviceWsIotPartials)
			if (!pkeys.length) return
			if (!rec.iotData) this.$set(rec, 'iotData', {})
			for (const k of pkeys) {
				const p = this._deviceWsIotPartials[k]
				if (p === null || p === undefined) continue
				const base = rec.iotData[k]
				this.$set(rec.iotData, k, mergeIotDataPoint(base, p))
			}
		},
	},
}