let parser = require('@architect/parser');
let fs = require('fs');

const INDEX_HTML = 'public/index.html';
const env = process.env.ARC_DEPLOY || 'staging';
const region = process.env.AWS_REGION;
const isOGS3 = region === 'us-east-1';
const S3domain = isOGS3 ? `https://s3.amazonaws.com/` : `https://s3-${region}.amazonaws.com/`;

// 0. read bucket info from arc file
let arc = parser(fs.readFileSync('.arc').toString());
let bucket = arc.static[(env === 'production' ? 1 : 0)][1];
// 1. based on env assemble proper js and css url (100% stolen from
// arc-repos/arc-functions/src/http/helpers/_static.js
let url = S3domain + bucket;
// 2. read public/index.html
let html = fs.readFileSync(INDEX_HTML).toString();
// 3. interpolate
// munge css
html = html.replace(/stylesheet" href="(.*\.css)"/i, 'stylesheet" href="' + url + '/$1"');
// munge js
html = html.replace(/script src="(.*\.js)"/i, 'script src="' + url + '/$1"');
// 4. dump to stdout
console.log('\nOverwriting URLs in public/index.html...');
fs.writeFileSync(INDEX_HTML, html, 'utf-8');
console.log('... done.');