const path = require('path');
const fs = require('fs');
const os = require('os');
const { parse } = require('date-fns');

// Node.js script that moves the user's last downloaded file (Mac OSX)
// to their current working directory.

const downloadsPath = path.resolve(os.homedir(), 'Downloads');

fs.readdir(downloadsPath, (err, files) => {
    if (err) return console.log('error found');

    const res = files.map((filename) => {
        const filepath = path.resolve(downloadsPath, filename);
        const { ctime, mtime } = fs.statSync(filepath);
        return { filename, filepath, lastChanged: parse(ctime), lastModified: parse(mtime) };
    });

    const mostRecentFile = res.reduce((a, b) => a.lastModified > b.lastModified ? a : b);
    const mostRecentFilename = mostRecentFile.filename;
    const mostRecentFilepath = mostRecentFile.filepath;

    fs.rename(mostRecentFilepath, path.resolve(__dirname, mostRecentFilename), err => console.log(err));
});