module.exports = function (RED) {
    "use strict";

    const https = require("https");
    const http = require("http");

    function ZammadConfigNode(config) {
        RED.nodes.createNode(this, config);
        const node = this;

        node.baseUrl = (config.baseUrl || "https://support.hanssonit.se/api/v1").replace(/\/+$/, "");
        node.useToken = config.useToken !== false;
        node.token = config.token || "";
        node.username = config.username || "";
        node.password = config.password || "";

        node.sendRequest = function (method, path, body, msgHeaders, callback) {
            const url = new URL(node.baseUrl + path);
            const parsedBody = body !== undefined ? (typeof body === "string" ? body : JSON.stringify(body)) : undefined;

            const headers = Object.assign({ "Accept": "application/json", "Content-Type": "application/json" }, msgHeaders || {});
            if (parsedBody !== undefined) headers["Content-Length"] = Buffer.byteLength(parsedBody);

            if (node.useToken && node.token) {
                headers["Authorization"] = "Token token=" + node.token;
            } else if (node.username && node.password) {
                headers["Authorization"] = "Basic " + Buffer.from(node.username + ":" + node.password).toString("base64");
            }

            const options = {
                method, hostname: url.hostname,
                port: url.port || (url.protocol === "https:" ? 443 : 80),
                path: url.pathname + url.search, headers, rejectUnauthorized: false
            };

            const req = (url.protocol === "https:" ? https : http).request(options, function (res) {
                let data = "";
                res.on("data", chunk => data += chunk);
                res.on("end", () => {
                    let parsed = null;
                    if (data) { try { parsed = JSON.parse(data); } catch (e) { parsed = data; } }
                    if (res.statusCode >= 200 && res.statusCode < 300) {
                        callback(null, { statusCode: res.statusCode, body: parsed, headers: res.headers });
                    } else {
                        const err = new Error("Zammad API returned status " + res.statusCode + ": " + data);
                        err.statusCode = res.statusCode;
                        err.body = parsed;
                        callback(err);
                    }
                });
            });
            req.on("error", callback);
            if (parsedBody !== undefined) req.write(parsedBody);
            req.end();
        };
    }

    RED.nodes.registerType("zammad-config", ZammadConfigNode);
};