var url = require("url");
module.exports.rewriteLinks = function (userServer) {
    var host = userServer.hostname;
    var string = host;
    var port = userServer.port;
    if (host && port) {
        if (parseInt(port, 10) !== 80) {
            string = host + ":" + port;
        }
    }
    var reg = new RegExp(
    // a simple, but exact match
    "https?:\\\\/\\\\/" +
        string +
        "|" +
        // following ['"] + exact
        "('|\")\\/\\/" +
        string +
        "|" +
        // exact match with optional trailing slash
        "https?://" +
        string +
        "(?!:)(/)?" +
        "|" +
        // following ['"] + exact + possible multiple (imr srcset etc)
        "('|\")(https?://|/|\\.)?" +
        string +
        "(?!:)(/)?(.*?)(?=[ ,'\"\\s])", "g");
    return {
        match: reg,
        //match: new RegExp("https?:\\\\/\\\\/" + string + "|https?://" + string + "(\/)?|('|\")(https?://|/|\\.)?" + string + "(\/)?(.*?)(?=[ ,'\"\\s])", "g"),
        //match: new RegExp("https?:\\\\?/\\\\?/" + string + "(\/)?|('|\")(https?://|\\\\?/|\\.)?" + string + "(\/)?(.*?)(?=[ ,'\"\\s])", "g"),
        //match: new RegExp('https?://' + string + '(\/)?|(\'|")(https?://|/|\\.)?' + string + '(\/)?(.*?)(?=[ ,\'"\\s])', 'g'),
        //match: new RegExp("https?:\\\\/\\\\/" + string, "g"),
        fn: function (req, res, match) {
            var proxyUrl = req.headers["host"];
            /**
             * Reject subdomains
             */
            if (match[0] === ".") {
                return match;
            }
            var captured = match[0] === "'" || match[0] === '"' ? match[0] : "";
            /**
             * allow http https
             * @type {string}
             */
            var pre = "//";
            if (match[0] === "'" || match[0] === '"') {
                match = match.slice(1);
            }
            /**
             * parse the url
             * @type {number|*}
             */
            var out = url.parse(match);
            /**
             * If host not set, just do a simple replace
             */
            if (!out.host) {
                string = string.replace(/^(\/)/, "");
                return captured + match.replace(string, proxyUrl);
            }
            /**
             * Only add trailing slash if one was
             * present in the original match
             */
            if (out.path === "/") {
                if (match.slice(-1) === "/") {
                    out.path = "/";
                }
                else {
                    out.path = "";
                }
            }
            /**
             * Finally append all of parsed url
             */
            return [
                captured,
                pre,
                proxyUrl,
                out.path || "",
                out.hash || ""
            ].join("");
        }
    };
};
/**
 * Remove 'domain' from any cookies
 * @param {Object} res
 */
module.exports.checkCookies = function checkCookies(res) {
    if (typeof res.headers["set-cookie"] !== "undefined") {
        res.headers["set-cookie"] = res.headers["set-cookie"].map(function (item) {
            return rewriteCookies(item);
        });
    }
};
/**
 * Remove the domain from any cookies.
 * @param rawCookie
 * @returns {string}
 */
function rewriteCookies(rawCookie) {
    var objCookie = (function () {
        // simple parse function (does not remove quotes)
        var obj = {};
        var pairs = rawCookie.split(/; */);
        pairs.forEach(function (pair) {
            var eqIndex = pair.indexOf("=");
            // skip things that don't look like key=value
            if (eqIndex < 0) {
                return;
            }
            var key = pair.substr(0, eqIndex).trim();
            obj[key] = pair.substr(eqIndex + 1, pair.length).trim();
        });
        return obj;
    })();
    var pairs = Object.keys(objCookie)
        .filter(function (item) {
        return item !== "domain";
    })
        .map(function (key) {
        return key + "=" + objCookie[key];
    });
    if (rawCookie.match(/httponly/i)) {
        pairs.push("HttpOnly");
    }
    return pairs.join("; ");
}
module.exports.rewriteCookies = rewriteCookies;
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