const {readFileSync, writeFileSync} = require('fs');
const {sync: glob} = require('glob');
const {minify} = require('html-minifier');
const {Logger} = require('plop-logger');
const {colorEmojiConfig} = require('plop-logger/lib/extra/colorEmojiConfig');

Logger.config = colorEmojiConfig;
const logger = Logger.getLogger('minifier');

glob(`public/**/*.html`)
    .forEach(file => {
        const html = readFileSync(file, 'utf8');
        const minified = minify(html, {});
        const gain = html.length - minified.length;
        if (gain > 0) {
            const percent = (gain / html.length) * 100;
            logger.info(file, () => ['gain', percent.toFixed(2), '%'].join(" "));
            writeFileSync(file, minified, {flag: 'w'});
        }
    });