const STORAGE_PREFIX = 'pda-dropship-palletizing-draft'

function clone(value) {
	return JSON.parse(JSON.stringify(value))
}

function text(value) {
	return value == null ? '' : String(value)
}

export function getDropshipPalletizingDraftKey(identity = {}) {
	const parts = [text(identity.operatorId), text(identity.taskId), text(identity.warehouseId)]
	return parts.every(Boolean) ? `${STORAGE_PREFIX}:${parts.map(encodeURIComponent).join(':')}` : ''
}

export function saveDropshipPalletizingDraft(identity, state) {
	const key = getDropshipPalletizingDraftKey(identity)
	if (!key || typeof uni === 'undefined' || typeof uni.setStorageSync !== 'function') return false
	uni.setStorageSync(key, { identity: { ...identity }, state: clone(state), updatedAt: new Date().toISOString() })
	return true
}

export function restoreDropshipPalletizingDraft(identity) {
	const key = getDropshipPalletizingDraftKey(identity)
	if (!key || typeof uni === 'undefined' || typeof uni.getStorageSync !== 'function') return null
	const saved = uni.getStorageSync(key)
	if (!saved?.state || text(saved.identity?.operatorId) !== text(identity.operatorId) || text(saved.identity?.taskId) !== text(identity.taskId) || text(saved.identity?.warehouseId) !== text(identity.warehouseId)) return null
	return clone(saved.state)
}

export function clearDropshipPalletizingDraft(identity) {
	const key = getDropshipPalletizingDraftKey(identity)
	if (!key || typeof uni === 'undefined' || typeof uni.removeStorageSync !== 'function') return false
	uni.removeStorageSync(key)
	return true
}