// module.exports = {
// 	download
// };

const request = require('request');
const fs = require('fs');
const os = require('os');
const {execSync} = require('child_process');
const path = require('path');
const copydir = require('copy-dir');
const pyversion = require('./getpythonversions.js');

async function download(ver) {

	let url = "-";
	let version = "";

	if (ver === undefined) {
		version = await pyversion.current;
		console.log("Python: " + version.toString() + " Selected");
	} else if (await pyversion.validateVersion(ver)) {
		version = ver;
		console.log("Python: " + version.toString() + " Selected");
	} else {
		console.log("Version of python not available");
	}

	
	if (version !== "") {
		console.log(version);
		await pyversion.getDownloadLink(version).then(value => {
			url = value;
			console.log(url);
		});
	}

	// console.log(url);
	
	// // let url = await getPythonDownloadLink();
	let filename = path.parse(url).base;
	try {
		fs.mkdirSync('Python-Installer');
	} catch(e) {'';}
	try {
		fs.mkdirSync('Python');
	} catch(e) {'';}
	try {
		fs.mkdirSync('Temp-Python');
	} catch(e) {'';}
	try {
		fs.writeFileSync('.installerLocation', filename);
	} catch(e) {'';}
	// let installSettings = fs.readFileSync('unattend.xml');

	let out_file = `Python-Installer/${filename}`

	await new Promise(resolve => {
		request({
			uri: url,
			encoding: null
		}, function (error, response, body) {
			fs.writeFileSync(out_file, body, {});
			resolve();
		});
	});

	console.log('Download Complete!');

	switch (os.platform())
	{
		case 'win32': {
			try {
				let installerPath = path.join(__dirname, '..', 'Python-Installer/', filename);
				let tempPath = path.join(__dirname, '..', 'Temp-Python/');
				let targetPath = path.join(__dirname, '..', 'Python/');
				execSync(`${installerPath} /passive DefaultJustForMeTargetDir=${tempPath}`, {
					stdio: "inherit"
				});
				
				console.log("Creating Portable Python Directory");

				copydir.sync(tempPath, targetPath);
				console.log("Portable Directory Created!");

				console.log("Uninstalling Unnecessary Python Files");

				execSync(`${installerPath} /passive /uninstall`, {
					stdio: 'inherit'
				});

				fs.rmdirSync(tempPath);

				console.log("PordaPy Installed!");
			} catch (err) {
				console.log(err);
			}
			break;
		}
	}
}
download('2.7.14');