/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/

import es from 'event-stream';
import Vinyl from 'vinyl';
import vfs from 'vinyl-fs';
import filter from 'gulp-filter';
import gzip from 'gulp-gzip';
import mime from 'mime';
import { ClientAssertionCredential } from '@azure/identity';
const azure = require('gulp-azure-storage');

const commit = process.env['BUILD_SOURCEVERSION'];
const credential = new ClientAssertionCredential(process.env['AZURE_TENANT_ID']!, process.env['AZURE_CLIENT_ID']!, () => Promise.resolve(process.env['AZURE_ID_TOKEN']!));

mime.define({
	'application/typescript': ['ts'],
	'application/json': ['code-snippets'],
});

// From default AFD configuration
const MimeTypesToCompress = new Set([
	'application/eot',
	'application/font',
	'application/font-sfnt',
	'application/javascript',
	'application/json',
	'application/opentype',
	'application/otf',
	'application/pkcs7-mime',
	'application/truetype',
	'application/ttf',
	'application/typescript',
	'application/vnd.ms-fontobject',
	'application/xhtml+xml',
	'application/xml',
	'application/xml+rss',
	'application/x-font-opentype',
	'application/x-font-truetype',
	'application/x-font-ttf',
	'application/x-httpd-cgi',
	'application/x-javascript',
	'application/x-mpegurl',
	'application/x-opentype',
	'application/x-otf',
	'application/x-perl',
	'application/x-ttf',
	'font/eot',
	'font/ttf',
	'font/otf',
	'font/opentype',
	'image/svg+xml',
	'text/css',
	'text/csv',
	'text/html',
	'text/javascript',
	'text/js',
	'text/markdown',
	'text/plain',
	'text/richtext',
	'text/tab-separated-values',
	'text/xml',
	'text/x-script',
	'text/x-component',
	'text/x-java-source'
]);

function wait(stream: es.ThroughStream): Promise<void> {
	return new Promise<void>((c, e) => {
		stream.on('end', () => c());
		stream.on('error', (err: any) => e(err));
	});
}

async function main(): Promise<void> {
	const files: string[] = [];
	const options = (compressed: boolean) => ({
		account: process.env.AZURE_STORAGE_ACCOUNT,
		credential,
		container: '$web',
		prefix: `${process.env.VSCODE_QUALITY}/${commit}/`,
		contentSettings: {
			contentEncoding: compressed ? 'gzip' : undefined,
			cacheControl: 'max-age=31536000, public'
		}
	});

	const all = vfs.src('**', { cwd: '../vscode-web', base: '../vscode-web', dot: true })
		.pipe(filter(f => !f.isDirectory()));

	const compressed = all
		.pipe(filter(f => MimeTypesToCompress.has(mime.lookup(f.path))))
		.pipe(gzip({ append: false }))
		.pipe(azure.upload(options(true)));

	const uncompressed = all
		.pipe(filter(f => !MimeTypesToCompress.has(mime.lookup(f.path))))
		.pipe(azure.upload(options(false)));

	const out = es.merge(compressed, uncompressed)
		.pipe(es.through(function (f) {
			console.log('Uploaded:', f.relative);
			files.push(f.relative);
			this.emit('data', f);
		}));

	console.log(`Uploading files to CDN...`); // debug
	await wait(out);

	const listing = new Vinyl({
		path: 'files.txt',
		contents: Buffer.from(files.join('\n')),
		stat: { mode: 0o666 } as any
	});

	const filesOut = es.readArray([listing])
		.pipe(gzip({ append: false }))
		.pipe(azure.upload(options(true)));

	console.log(`Uploading: files.txt (${files.length} files)`); // debug
	await wait(filesOut);
}

main().catch(err => {
	console.error(err);
	process.exit(1);
});
