import { SetStorageOptions, SetStorageSuccess, GetStorageOptions, GetStorageSuccess } from "./interface.uts"


const STORAGE_DATA_TYPE = '__TYPE'
const STORAGE_KEYS = 'uni-storage-keys'

/**
 * add since 2023-09-04 过滤原生数据类型对齐 web typeOf 用于兼容旧数据
 */
function filterNativeType(src:string):string{
	if(src == "Double" || src == "Float" || src == "Long" || src == "Int" || src == "Short" || src == "Byte" || src == "UByte" || src == "UShort" || src == "UInt" || src == "ULong"){
		return "number"
	}
	
	return src
}


function parseValue(value: any): any | null {
	const types = ['object', 'string', 'number', 'boolean', 'undefined']
	const object = typeof value == 'string' ? JSON.parse(value as string) : value
	if (object == null) {
		return null
	} else {
		const type = typeof object
		if (types.indexOf(type) >= 0) {
			// @ts-expect-error   
			if (object instanceof UTSJSONObject || object instanceof Map<string,any>) { 
				// @ts-expect-error   
				const map = (object instanceof UTSJSONObject) ? (object as UTSJSONObject).toMap() : (object as Map<string,any>) 
				if (map.size  == 2 && map.has('data')  && map.has('type')) {
					let dataType:string = ""
					if(map.get("type") ==  null){
						dataType = ""
					}else{
						dataType = map.get("type") as string
					}
					if (filterNativeType(typeof map.get('data')) == dataType && dataType != 'string') {
						return map.get('data')
					}else if (typeof map.get('data') == dataType && dataType == 'string') {
						const regex = /^\d{4}-\d{2}-\d{2}T\d{2}\:\d{2}\:\d{2}\.\d{3}Z$/    
						// @ts-expect-error
						if (type == 'object' && regex.test(map.get('data') as string)) {
							let dateStr = map.get('data') as string
							return new Date(dateStr)
						}
						return map.get('data')
					}
				} else if (map.size >= 1){
					return ''
				}
			}
		}
		return null
	}
}

function praseGetStorage(type: string, value: string): any | null {
	let data: any | null = value
	if (type != 'string' || (type == "string" && value == '{"type":"undefined"}')) {
		// 兼容H5和V3初期历史格式
		let object = JSON.parse(value)
		
		if (object == null) {
			return data
		}
		
		const result = parseValue(object)
		if (result != null) {
			data = result
		} else if (type != null && type != ""){
			// 兼容App端历史格式
			data = object
			if (typeof object == 'string') {
				object = JSON.parse(object as string)
				const objectType = typeof object
				if (objectType == 'number' && type == 'date') {
					let dateNum = object as number
					data = new Date(dateNum)
				} else if (objectType == (['null', 'array'].indexOf(type) < 0 ? type : 'object')) {
					data = object
				}
			}
		}
	}
	return data
}

function uni_setStorageSync(key: string, data: any, saveItemHandler: (key: string, data: string) => void, removeItemHandler: (key: string) => void) {
	let type = filterNativeType(typeof data)
	let value: string | null = null
	 value = (type == 'string') ? (data as string) : JSON.stringify({type: type, data: data})
	if (type == 'string' && parseValue(data) != null) {
		saveItemHandler(key + STORAGE_DATA_TYPE, type)
	} else{
		removeItemHandler(key + STORAGE_DATA_TYPE)
	}
	
	if(value ==  null){
		value = ""
	}
	
	saveItemHandler(key, value!)
}

function uni_setStorageAsync(options: SetStorageOptions, saveItemAsyncHandler: (key: string, data: string) => void, removeItemAsyncHandler: (key: string) => void) {
	const type = filterNativeType(typeof options.data)
	let value: string | null = null
	value = (type == 'string') ? (options.data as string) : JSON.stringify({type: type, data: options.data})
	if (value == null) {
		let fail = new UniError("uni-storage", -1, "data can not be stringify")
		options.fail?.(fail) 
		options.complete?.(fail)
	} else{
		if (type == 'string' && parseValue(options.data) != null) {
			saveItemAsyncHandler(options.key + STORAGE_DATA_TYPE, type)
		} else{
			removeItemAsyncHandler(options.key + STORAGE_DATA_TYPE)
		}
		if(value == null){
			value = ""
		}
		saveItemAsyncHandler(options.key, value!)
		let success: SetStorageSuccess = {
		}
		options.success?.(success)
		options.complete?.(success)  
	}

}

function uni_getStorageSync(key: string, getItemHandler: ((key: string) => string | null)): any | null {
	let value = getItemHandler(key)
	let typeOrigin = getItemHandler(key + STORAGE_DATA_TYPE)
	if(typeOrigin == null){
		typeOrigin = ""
	}
	
	const type = typeOrigin!.toLowerCase()
	if (typeof value != "string") {
		return ''
	}
	if(value == null){
		value = ""
	}
	return praseGetStorage(type, value!)
}

function uni_getStorageAsync(options: GetStorageOptions, getItemAsyncHandler: ((key: string) => string | null), includesKey: (key: string) => boolean) {
	let ret = includesKey(options.key);
	if (!ret) {
		let fail = new UniError("uni-storage", -2, "getStorage:fail data not found")
		options.fail?.(fail);
		options.complete?.(fail);
		return;
	}
	let value = getItemAsyncHandler(options.key)
	if(value == null){
		value = ""
	}
	let typeOrigin = getItemAsyncHandler(options.key + STORAGE_DATA_TYPE)
	if(typeOrigin == null){
		typeOrigin = ""
	}
	const type = typeOrigin!.toLowerCase()
	
	if (typeof value != "string") {
		let success: GetStorageSuccess = {
			data: ""
		}
		options.success?.(success)
		options.complete?.(success)
	}else {
		const data = praseGetStorage(type, value!)
		let success: GetStorageSuccess = {
			data: data
		}
		options.success?.(success)
		options.complete?.(success)
	}
}

export {
	STORAGE_DATA_TYPE,
	STORAGE_KEYS,
	uni_setStorageSync,
	uni_setStorageAsync,
	uni_getStorageSync,
	uni_getStorageAsync,
}