/* eslint-disable no-process-exit, unicorn/no-process-exit */

import { app } from "../app.js";

import http from "node:http";

import * as configFunctions from "../helpers/functions.config.js";

import exitHook from "exit-hook";

import ntfyPublish from "@cityssm/ntfy-publish";
import type * as ntfyTypes from "@cityssm/ntfy-publish/types";

import Debug from "debug";
const debug = Debug("lot-occupancy-system:www");

interface ServerError extends Error {
    syscall: string;
    code: string;
}

const onError = (error: ServerError) => {
    if (error.syscall !== "listen") {
        throw error;
    }

    // handle specific listen errors with friendly messages
    switch (error.code) {
        // eslint-disable-next-line no-fallthrough
        case "EACCES": {
            debug("Requires elevated privileges");
            process.exit(1);
            // break;
        }

        // eslint-disable-next-line no-fallthrough
        case "EADDRINUSE": {
            debug("Port is already in use.");
            process.exit(1);
            // break;
        }

        // eslint-disable-next-line no-fallthrough
        default: {
            throw error;
        }
    }
};

const onListening = (server: http.Server) => {
    const addr = server.address();

    if (addr) {
        const bind = typeof addr === "string" ? "pipe " + addr : "port " + addr.port.toString();
        debug("Listening on " + bind);
    }
};

/*
 * Initialize HTTP
 */

const ntfyStartupConfig = configFunctions.getProperty("application.ntfyStartup");

const httpPort = configFunctions.getProperty("application.httpPort");

const httpServer = http.createServer(app);

httpServer.listen(httpPort);

httpServer.on("error", onError);
httpServer.on("listening", () => {
    onListening(httpServer);
});

debug("HTTP listening on " + httpPort.toString());

exitHook(() => {
    debug("Closing HTTP");
    httpServer.close();
});

if (ntfyStartupConfig) {
    const topic = ntfyStartupConfig.topic;
    const server = ntfyStartupConfig.server;

    const ntfyStartupMessage: ntfyTypes.NtfyMessageOptions = {
        topic,
        title: configFunctions.getProperty("application.applicationName"),
        message: "Application Started",
        tags: ["arrow_up"]
    };

    const ntfyShutdownMessage: ntfyTypes.NtfyMessageOptions = {
        topic,
        title: configFunctions.getProperty("application.applicationName"),
        message: "Application Shut Down",
        tags: ["arrow_down"]
    };

    if (server) {
        ntfyStartupMessage.server = server;
        ntfyShutdownMessage.server = server;
    }

    await ntfyPublish(ntfyStartupMessage);

    exitHook(() => {
        debug("Sending ntfy notification");
        ntfyPublish(ntfyShutdownMessage);
    });
}