import fs = require("fs");
import path = require("path");

export namespace FileUtil{
    /** 遍历文件夹（返回是否是文件夹） */
    export function walkDir(url:string,onFile?:Function,onDir?:Function,thisObj?:any):boolean {
        url = path.normalize(url);
        var stats = fs.statSync(url);
        if (stats.isDirectory()) {
            if(onDir) onDir.call(thisObj,url);
            var files = fs.readdirSync(url);
            for (var i = 0, len = files.length; i < len; i++) {
                walkDir(path.join(url,files[i]),onFile,onDir,thisObj);
            }
            return true;
        } else {
            if(onFile) onFile.call(thisObj,url);
            return false;
        }
    }



    /**
     * 创建文件夹
     * @param dir 文件夹路径
     * @returns 是否创建成功
     */
    // 创建文件夹
    export function mkdirSync(url:string) {
        url = path.normalize(url);
        if (!fs.existsSync(url))
        {
            mkdirSync(path.dirname(url));
            fs.mkdirSync(url);
        }
    }

    /** 删除文件或文件夹 */
    /** 删除文件或文件夹 */
    export function rmdirSync(url) {
        var files = [];
        if (fs.existsSync(url)) {
            files = fs.readdirSync(url);
            files.forEach(function(file, index) {
                var subUrl = path.join(url, file);
                if (fs.statSync(subUrl).isDirectory()) { // recurse
                    rmdirSync(subUrl);
                } else { // delete file
                    fs.unlinkSync(subUrl);
                }
            });
            fs.rmdirSync(url);
        }
    }

    /**
     * 复制文件或文件夹
     * @param fromUrl 源文件夹
     * @param toUrl 目标文件夹
     * @param suff 文件后缀名, 空表示不过滤文件后缀名, 多个可用 "|" 分隔
     * @param subfolder 是否获取子文件夹
     * @param ignoreFile 用于自定义来判断是否需要忽略指定的文件或文件夹
     */
    export function copyDir(fromUrl, toUrl) {
        fromUrl = path.normalize(fromUrl);
        toUrl = path.normalize(toUrl);
        walkDir(fromUrl,
        function(fileUrl){
            fs.writeFileSync(fileUrl.replace(fromUrl,toUrl),fs.readFileSync(fileUrl));
        },function(dicUrl:string){
            mkdirSync(dicUrl.replace(fromUrl,toUrl));
        });
    }

    /** 返回文件完整名 */
    export function filename(url:string):string {
        return path.normalize(path.join(path.dirname(url),path.basename(url,path.extname(url))));
    }

    /** 字符串全局替换 */
    export function replace(str:string,strA,strB):string {
        while(str.indexOf(strA) >= 0)
        {
            str = str.replace(strA,strB);
        }
        return str;
    }
}