export { xFileSListType } from "../interface"

export type fileListType = xFileSListType;


type xFileSNameTYpe = {
	name:string,
	type:string,
	uri:string,
	id:string,
	file:any,
	size:number,
	status:number
}
// type callReadBackFun = (byte:ByteArray)=>void



/**
 * 由于安卓隐私的问题。实际得到的所有文件 其实 都不是真实地址。因此你想要得到真实的地址，你就得复制到你的应用沙盒中。
 */
export class xFileSystem {
	mimeTypeFilter = [] as string[];
	filelist = [] as xFileSNameTYpe[]
	inputDom:null|HTMLInputElement = null;
	multiple:boolean = true;
	maxFileSize:number = 30*1024*1024
	constructor(typeFilter:string|null,tempmultiple:boolean|null,maxSize:number|null){
		if(typeFilter!=null){
			
			let filter : string[] = [] as string[];
			let tms = typeFilter! as string[]
			for (let i = 0; i < tms.length; i++) {
				filter.push("."+tms[i])
			}
			if(filter.length==0){
				filter.push("*/*")
			}
			
			this.mimeTypeFilter = filter
		}
		if(tempmultiple!=null){
			this.multiple = tempmultiple!
		}
		if(maxSize!=null){
			this.maxFileSize = maxSize!
		}
	}
	isInfilelist(file:xFileSNameTYpe):boolean{
		return this.filelist.some((el):boolean=>{
			return el.name==file.name&&el.type==file.type
		})
	}
	destory(){
		
	}
	openDocument(call:(list:fileListType[])=>void){
		if(this.inputDom!=null){
			this.inputDom!.remove()
		}
		let _this = this;
		let inputdom = document.createElement("input")
		inputdom.type = 'file';
		inputdom.accept = this.mimeTypeFilter.join(", ");
		inputdom.style.setProperty('position','absolute')
		inputdom.style.setProperty('left','-200%')
		inputdom.style.setProperty('top','-200%')
		inputdom.style.setProperty('opacity','0')
		if(this.multiple){
			inputdom.multiple = "multiple"
		}
		inputdom.onchange = function(evt){
			let filelist = inputdom.files||[] as File[];
			for(let i=0;i<filelist.length;i++){
				let item = filelist[i];
				
				let fileitem = {
					name:item.name,
					type:item.type.substring(item.type.lastIndexOf("/")+1),
					uri:"",
					id:Math.floor(Math.random() * 1 * Math.floor(Math.random() * Date.now())).toString().substring(0, 10),
					file:item
					size:item.size,
					status:item.size>_this.maxFileSize?4:0
				} as xFileSNameTYpe
				if(!_this.isInfilelist(fileitem)){
					_this.filelist.push(fileitem)
				}
				
			}
			
			call(_this.filelist.map((el)=>{
				return {
					name:el.name,
					type:el.type,
					file:el.file,
					id:el.id,
					request:null,
					realFilePath:"",
					cacheFilePath:"",
					size:el.size,
					status:el.size>_this.maxFileSize?4:0
				}
			}))
		}
		inputdom.click()
	}
	/**
	 * 删除一个文件条目
	 * @param {string} id - 文件id
	 * @returns {fileListType[]} 最新的文件列表
	 */
	remove(id:string):fileListType[]{
		return [] as fileListType[]
	}
	/**
	 * 返回一个空文件列表数组
	 */
	clear():fileListType[]{
		this.filelist = [] as xFileSNameTYpe[];
		return [] as fileListType[]
	}
	copyFileToPath(item:fileListType,path:string):Promise<fileListType|null>{
		return Promise.resolve(item)
	}
	
	
}