import {getConfig} from '../helpers/config';
import webpack from 'webpack';
import StatoscopeWebpackPlugin from '@statoscope/webpack-plugin';
import fs from 'fs';
import minimist from 'minimist';

const help = `
Uses Statoscope to visualize the size of the project's output files.

Usage: lipemat-js-boilerplate analyze [--stats-only|--help]

  --help, -h Show help menu.
  --stats-only Generate stats.json file for use with https://statoscope.tech for comparing diffs between builds.
	
`;


// Command line arguments.
const flags = minimist( process.argv.slice( 2 ) );
const workingDirectory = fs.realpathSync( process.cwd() );
const statsDir = workingDirectory + '/node_modules/.cache/statoscope';
const webpackConfig = getConfig( 'webpack.dist' );

if ( true === flags.h || true === flags.help ) {
	console.log( help );
	process.exit( 0 );
}


function analyze() {
	webpackConfig.plugins?.push( new StatoscopeWebpackPlugin( {
		saveOnlyStats: true === ( flags[ 'stats-only' ] ?? false ),
		saveStatsTo: statsDir + '/stats-[hash].json',
		saveReportTo: statsDir + '/stats-[hash].html',
	} ) );

	// Use the default webpack stats configuration.
	delete webpackConfig.stats;

	webpack( webpackConfig ).run( ( err, stats ) => {
		if ( err ) {
			throw err;
		}
		if ( 'undefined' === typeof stats ) {
			return;
		}
		if ( stats.hasErrors() ) {
			process.exit( 1 );
		}
	} );
}

analyze();