/**
 * @file Main entry point for the application backend.
 */

import express from "express";
import path from "path";

import cors from "cors";
import passport from "passport";
import BearerStrategy from "passport-http-bearer";



import spaRouter from "./routers/spaRouter.js";
import api_v1_Router from "./routers/api_v1_Router.js";
import expressListRoutes from "express-list-routes";

import AuthService from "./modules/Auth/AuthService";

/**
 * The port the server will listen on.
 * @type {number}
 */
const port = process.env.PORT || 3000;

/**
 * The path to the distribution directory.
 * @type {string}
 */
const distPath = path.join(path.resolve(), "dist");



/**
 * The Express application instance.
 * @type {express.Application}
 */
const app = express();

app.use(express.json());

/**
 * Serves static files from the distribution directory in production, or the current working directory in development.
 */
if (process.env.NODE_ENV === "production") {
    app.use("/", express.static(distPath));
} else {
    app.use(express.static(path.join(process.cwd())));
}


/**
 * Authentication middlewares
 */
app.use(cors());
passport.use(new BearerStrategy(AuthService.auth))



/**
 * Mounts the API v1 router at the `/api/v1` endpoint.
 */
app.use("/api/v1", api_v1_Router);


/**
 * Handles requests to the `/api` endpoint that don't match any existing routes.
 * Responds with a 404 error.
 */
app.use("/api", (req, res) => {
    res.status(404).json({error: 404});
});

/**
 * Mounts the SPA router.
 */
app.use(spaRouter);


/**
 * Starts the server and listens for incoming requests on the specified port.
 */
app.listen(port, () => {
    console.log("Server listening on port", port);
});
expressListRoutes(app);