#!/usr/bin/env node

/**
 * This script parses index.html and sets the version query string of each
 * resource to be the MD5 hash of that resource.
 * It also updates news and the learnsets-g6.js file.
 */

"use strict";

const path = require('path');
const fs = require('fs');
const crypto = require('crypto');
const child_process = require('child_process');

const thisDir = __dirname;
const rootDir = path.resolve(thisDir, '..');
process.chdir(rootDir);

/*********************************************************
 * Update version number
 *********************************************************/

process.stdout.write("Updating version... ");

let version = require('../package.json').version;

let configBuf = fs.readFileSync('config/config.js', {encoding: 'utf8'});
configBuf = configBuf.replace(/\/\* version \*\/[^;\n]*;/, `/* version */ Config.version = ${JSON.stringify(version)};`);

fs.writeFileSync('config/config.js', configBuf);
console.log("DONE");

/*********************************************************
 * Compile TS files
 *********************************************************/

let ignoreGraphics = ' --ignore "src/battle-animations.js","src/battle-animations-moves.js"';
if (process.argv[2] === 'full') {
	ignoreGraphics = '';
} else {
	try {
		fs.statSync('data/graphics.js');
		// graphics.js exists, recompile it
		ignoreGraphics = '';
	} catch (e) {}
}

child_process.execSync(`node build-tools/babel-cli/bin/babel.js src --out-dir js --extensions ".ts,.tsx" --incremental${ignoreGraphics}`);

fs.writeFileSync(
	'js/battledata.js',
	fs.readFileSync('js/battle-dex.js') + '\n\n' +
		fs.readFileSync('js/battle-dex-data.js') + '\n\n' +
		fs.readFileSync('js/battle-log.js') + '\n\n' +
		fs.readFileSync('src/battle-log-misc.js') +
		fs.readFileSync('data/text.js') + '\n\n' +
		fs.readFileSync('js/battle-text-parser.js')
);

if (!ignoreGraphics) {
	fs.writeFileSync(
		'data/graphics.js',
		fs.readFileSync('js/battle-animations.js') + '\n\n' +
			fs.readFileSync('js/battle-animations-moves.js')
	);
}

/*********************************************************
 * Update cachebuster and News
 *********************************************************/

function updateIndex() {
	let indexContents = fs.readFileSync('index.template.html', {encoding: 'utf8'});

	// add hashes to js and css files
	process.stdout.write("Updating hashes... ");
	indexContents = indexContents.replace(/(src|href)="\/(.*?)\?[a-z0-9]*?"/g, function (a, b, c) {
		let hash = Math.random(); // just in case creating the hash fails
		try {
			const filename = c.replace('/play.pokemonshowdown.com/', '');
			const fstr = fs.readFileSync(filename, {encoding: 'utf8'});
			hash = crypto.createHash('md5').update(fstr).digest('hex').substr(0, 8);
		} catch (e) {}

		return b + '="/' + c + '?' + hash + '"';
	});
	console.log("DONE");

	// add news, only if it's actually likely to exist
	if (__dirname.endsWith('play.pokemonshowdown.com/build-tools')) {
		process.stdout.write("Updating news... ");
		child_process.exec('php ' + path.resolve(thisDir, 'news-data.php'), function (error, stdout, stderr) {
			let newsData = [0, '[failed to retrieve news]'];
			if (!error && !stderr) {
				try {
					newsData = JSON.parse(stdout);
				} catch (e) {
					console.log("git hook failed to retrieve news (parsing JSON failed):\n" + e.stack);
				}
			} else {
				console.log("git hook failed to retrieve news (exec command failed):\n" + (error + stderr + stdout));
			}

			indexContents = indexContents.replace(/<!-- newsid -->/g, newsData[0]);
			indexContents = indexContents.replace(/<!-- news -->/g, newsData[1]);
			console.log("DONE");

			process.stdout.write("Writing new `index.html` file... ");
			fs.writeFileSync('index.html', indexContents);
			console.log("DONE");
		});
	}
}

updateIndex();