"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.Polyfill = void 0;
const polyfillLibrary = require("polyfill-library");
const _1 = require(".");
const threads_1 = require("threads");
function getRouter(fileToWatch, opts) {
    const features = new _1.WaitForSync();
    (() => __awaiter(this, void 0, void 0, function* () {
        const worker = yield threads_1.spawn(new threads_1.Worker('./polyfill-worker'));
        const feats = yield worker(fileToWatch);
        yield threads_1.Thread.terminate(worker);
        return feats;
    }))()
        .then(feats => {
        feats['fetch'] = {};
        _1.Logger.debug('Polyfill analysed:', Object.keys(feats));
        features.setData(feats);
    })
        .catch(err => features.setError(err));
    const options = Object.assign({ minify: _1.DefaultConfig.isProduction, unknown: 'polyfill' }, opts);
    return (req, res) => __awaiter(this, void 0, void 0, function* () {
        const polyfillBundle = yield polyfillLibrary.getPolyfillString(Object.assign(Object.assign({}, options), { uaString: req.header('user-agent'), features: yield features.resolve(), stream: false }));
        res.setHeader('Content-Type', 'text/javascript');
        res.send(polyfillBundle);
    });
}
exports.Polyfill = {
    getRouter: getRouter,
};