import * as path from 'path';
import * as http from 'https';
import * as fs from "fs";

/**
 * 下载文件到指定的文件地址
 */
export function downLoadFile(url: string, filePath: string)
{
    if (fs.existsSync(filePath))
        fs.unlinkSync(filePath);
    else if (!fs.existsSync(path.dirname(filePath)))
        fs.mkdirSync(path.dirname(filePath));
    let file = fs.createWriteStream(filePath);
    http.get(url, function (response)
    {
        response.pipe(file);
    });
}

/**
 * 拷贝文件.
 *
 * @param {*} source 目标文件的地址
 * @param {*} targetFile 拷贝到新的地址
 */
export function copyFileSync(source: string, targetFile: string)
{
    //if target is a directory a new file with the same name will be created
    if (fs.existsSync(targetFile))
    {
        if (fs.lstatSync(targetFile).isDirectory())
            targetFile = path.join(targetFile, path.basename(source));
    }
    fs.writeFileSync(targetFile, fs.readFileSync(source));
    console.log('targetFile: ', targetFile);
}

export function copyFolderRecursiveSync(source: string, target: string)
{
    let files: string[] = [];
    //check if folder needs to be created or integrated
    let targetFolder = path.join(target, path.basename(source));
    if (!fs.existsSync(targetFolder))
        fs.mkdirSync(targetFolder);

    //copy
    if (fs.lstatSync(source).isDirectory())
    {
        files = fs.readdirSync(source);
        files.forEach(function (file)
        {
            let curSource = path.join(source, file);
            if (fs.lstatSync(curSource).isDirectory())
                copyFolderRecursiveSync(curSource, targetFolder);
            else
                copyFileSync(curSource, targetFolder);
        });
    }
}

/**
 * 获得文件夹内所有的文件(递归遍历)
 */
export function getFiles(path: string, resultFiles: string[] = [])
{
    let files = fs.readdirSync(path);
    for (let file of files)
    {
        let name = path + '/' + file;
        if (fs.statSync(name).isDirectory())
            getFiles(name, resultFiles);
        else
            resultFiles.push(name);
    }
    return resultFiles;
}