import { reactive } from 'vue'

const STORAGE_KEY = 'overseas-pda-warehouse-work-v1'
const blankState = () => ({
	scopeKey: '',
	stocktake: { taskNo: '', scopeType: 'LOCATION', scopeCode: '', reason: '', pendingKeys: {} },
	move: { sourcePalletCode: '', targetLocationCode: '', reason: '', pendingKeys: {} },
	relabel: { currentNo: '', oldLabel: '', newLabel: '', action: 'RELABEL', reason: '', remark: '', photoFileIds: [], photoNames: [], pendingKeys: {} },
	returnReceipt: { pendingBatch: null, entryMode: 'SKU', lookupCode: '', currentReturnNo: '', startedBy: 'SKU', trackingNo: '', palletCode: '', quantities: {}, boxCounts: {}, pendingKeys: {} },
	returnPacking: { searchCode: '', selectedOrders: [], quantities: {}, length: '', width: '', height: '', weight: '', pendingKeys: {} },
	returnPackingPlan: { pendingKeys: {} },
	warehouseTransfer: { currentNo: '', pendingKeys: {} },
	query: { inventoryCode: '', locationCode: '', palletCode: '' }
})

export const warehouseWork = reactive(blankState())

function storageAvailable() {
	return typeof uni !== 'undefined' && typeof uni.setStorageSync === 'function' && typeof uni.getStorageSync === 'function'
}

function domain(value, fallback) { return { ...fallback, ...(value || {}), pendingKeys: { ...(value?.pendingKeys || {}) } } }

export function persistWarehouseWork() {
	if (!storageAvailable() || !warehouseWork.scopeKey) return
	uni.setStorageSync(STORAGE_KEY, JSON.parse(JSON.stringify(warehouseWork)))
}

export function restoreWarehouseWork(scopeKey) {
	const expected = String(scopeKey || '')
	if (!expected) return false
	const saved = storageAvailable() ? uni.getStorageSync(STORAGE_KEY) : null
	const fresh = blankState()
	if (!saved || saved.scopeKey !== expected) {
		Object.assign(warehouseWork, fresh, { scopeKey: expected })
		if (storageAvailable()) uni.removeStorageSync(STORAGE_KEY)
		return false
	}
	Object.assign(warehouseWork, fresh, {
		scopeKey: expected,
		stocktake: domain(saved.stocktake, fresh.stocktake), move: domain(saved.move, fresh.move),
		relabel: domain(saved.relabel, fresh.relabel), returnReceipt: domain(saved.returnReceipt, fresh.returnReceipt),
		returnPacking: domain(saved.returnPacking, fresh.returnPacking),
		returnPackingPlan: domain(saved.returnPackingPlan, fresh.returnPackingPlan),
		warehouseTransfer: domain(saved.warehouseTransfer, fresh.warehouseTransfer),
		query: { ...fresh.query, ...(saved.query || {}) }
	})
	return true
}

export function updateWarehouseWork(name, patch) {
	if (!warehouseWork[name]) throw new Error('未知海外仓现场作业')
	Object.assign(warehouseWork[name], patch)
	persistWarehouseWork()
}

export function warehouseIdempotencyKey(name, action, payload = {}) {
	const target = warehouseWork[name]
	if (!target?.pendingKeys) throw new Error('当前作业不支持写操作')
	const signature = `${action}:${JSON.stringify(payload)}`
	if (!target.pendingKeys[signature]) target.pendingKeys[signature] = `pda-${name}-${action}-${Date.now()}-${Math.random().toString(36).slice(2, 10)}`
	persistWarehouseWork()
	return { signature, value: target.pendingKeys[signature] }
}

export function releaseWarehouseKey(name, signature) {
	if (!warehouseWork[name]?.pendingKeys) return
	delete warehouseWork[name].pendingKeys[signature]
	persistWarehouseWork()
}

export function resetWarehouseDomain(name) {
	const fresh = blankState()
	if (!fresh[name]) return
	warehouseWork[name] = fresh[name]
	persistWarehouseWork()
}

export function resetWarehouseWork() {
	Object.assign(warehouseWork, blankState())
	if (typeof uni !== 'undefined' && typeof uni.removeStorageSync === 'function') uni.removeStorageSync(STORAGE_KEY)
}