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());
    });
};
import { request as httpReq } from 'http';
import { request as httpsReq } from 'https';
export class Follow {
    constructor(follow) {
        this.follow = follow;
    }
}
export class Stop {
    constructor(stop) {
        this.stop = stop;
    }
}
export function locationHeaderPlugin(url, response, previous) {
    return __awaiter(this, void 0, void 0, function* () {
        const { protocol, host } = url;
        if (response.headers.location) {
            const followUrl = new URL(response.headers.location.startsWith('http')
                ? response.headers.location
                : `${protocol}//${host}${response.headers.location}`);
            return new Follow(followUrl);
        }
        return previous;
    });
}
const defaultOptions = {
    method: 'GET',
    maxRedirects: 3,
    headers: {},
    timeout: 120000,
    plugins: [locationHeaderPlugin]
};
function makeRequest(url, options) {
    return new Promise((resolve, reject) => {
        const request = url.protocol === 'https:' ? httpsReq : httpReq;
        const req = request(url, options, (response) => {
            resolve(response);
        });
        req.on('error', reject);
        req.setTimeout(options.timeout, () => req.destroy());
        req.end();
    });
}
export const tall = (url, options) => __awaiter(void 0, void 0, void 0, function* () {
    const opt = Object.assign({}, defaultOptions, options);
    if (opt.maxRedirects <= 0) {
        return url.toString();
    }
    const parsedUrl = new URL(url);
    let prev = new Stop(parsedUrl);
    const response = yield makeRequest(parsedUrl, opt);
    for (const plugin of opt.plugins) {
        prev = yield plugin(parsedUrl, response, prev);
    }
    const maxRedirects = opt.maxRedirects - 1;
    if (prev instanceof Follow) {
        return yield tall(prev.follow.toString(), Object.assign(Object.assign({}, options), { maxRedirects }));
    }
    return prev.stop.toString();
});
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