"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.AutoReloader = void 0;
const express_1 = require("express");
const _1 = require(".");
const uuid_1 = require("uuid");
function getRouter(opts) {
    const config = {
        frontendDirs: Array.isArray(opts.frontendDirs) ? opts.frontendDirs : [opts.frontendDirs],
        subPath: opts.subPath || '/auto-reload',
        jsName: opts.jsName || 'client.js',
    };
    const router = express_1.Router();
    if (!_1.DefaultConfig.isProduction) {
        let uuid = uuid_1.v4();
        let updateTimeout = undefined;
        Promise.resolve().then(() => require('node-watch')).then((watch) => {
            for (const frontendDir of config.frontendDirs) {
                watch.default(frontendDir, { recursive: true }, () => {
                    if (updateTimeout !== undefined)
                        clearTimeout(updateTimeout);
                    updateTimeout = setTimeout(() => {
                        uuid = uuid_1.v4();
                    }, 200);
                });
            }
        }).catch((err) => { _1.Logger.error(err); });
        // /auto-reload/client.js
        router.get(_1.urlJoin(config.subPath, config.jsName), (req, res) => {
            _1.Logger.debug(req.url, req.originalUrl, req.baseUrl);
            res.setHeader('Content-Type', 'application/javascript');
            // language=JavaScript
            res.send(`
		const loc = window.location;
		const url = loc.protocol+'//'+loc.host+'${_1.urlJoin(req.baseUrl, config.subPath)}';
		// const parse = async res => (await res.json()).uuid;
		const parse = function(res) {
		    return res.json()
		    .then(function(json) {return json.uuid;}) }
		let hash = undefined;
		let hadError = false;
		setInterval(function() {
	    try {
        fetch(url)
        .then(function(res) { return parse(res) })
        .then(function(data) {
		      if (data) {
		          hash = hash === undefined ? data : hash;
		          if (hash !== data) {
		              window.location.reload();
		          }
		      }
        });
	    } catch (e) {
	        if (hadError === false) {
	            console.log(e);
	            hadError = true;
	        }
	    }
    }, 3000);
	`.replace(/\t/g, ''));
        });
        // /auto-reload
        router.get(_1.urlJoin(config.subPath), (req, res) => {
            req.noHttpLogging = true;
            res.json({ uuid });
        });
    }
    return router;
}
exports.AutoReloader = {
    getRouter,
};