import { Router } from "express";

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

import * as authenticationFunctions from "../helpers/functions.authentication.js";

import { useTestDatabases } from "../data/databasePaths.js";

import { getApiKey } from "../helpers/functions.api.js";

import Debug from "debug";

import type * as recordTypes from "../types/recordTypes";

const debug = Debug("lot-occupancy-system:login");

export const router = Router();

router
    .route("/")
    .get((request, response) => {
        const sessionCookieName = configFunctions.getProperty("session.cookieName");

        if (request.session.user && request.cookies[sessionCookieName]) {
            const redirectURL = authenticationFunctions.getSafeRedirectURL(
                (request.query.redirect || "") as string
            );

            response.redirect(redirectURL);
        } else {
            response.render("login", {
                userName: "",
                message: "",
                redirect: request.query.redirect,
                useTestDatabases
            });
        }
    })
    .post(async (request, response) => {
        const userName = (
            typeof request.body.userName === "string" ? request.body.userName : ""
        ) as string;

        const passwordPlain = (
            typeof request.body.password === "string" ? request.body.password : ""
        ) as string;

        const unsafeRedirectURL = request.body.redirect;

        const redirectURL = authenticationFunctions.getSafeRedirectURL(
            typeof unsafeRedirectURL === "string" ? unsafeRedirectURL : ""
        );

        let isAuthenticated = false;

        if (userName.charAt(0) === "*") {
            if (useTestDatabases && userName === passwordPlain) {
                isAuthenticated = configFunctions.getProperty("users.testing").includes(userName);

                if (isAuthenticated) {
                    debug("Authenticated testing user: " + userName);
                }
            }
        } else if (userName !== "" && passwordPlain !== "") {
            isAuthenticated = await authenticationFunctions.authenticate(userName, passwordPlain);
        }

        let userObject: recordTypes.User;

        if (isAuthenticated) {
            const userNameLowerCase = userName.toLowerCase();

            const canLogin = configFunctions
                .getProperty("users.canLogin")
                .some((currentUserName) => {
                    return userNameLowerCase === currentUserName.toLowerCase();
                });

            if (canLogin) {
                const canUpdate = configFunctions
                    .getProperty("users.canUpdate")
                    .some((currentUserName) => {
                        return userNameLowerCase === currentUserName.toLowerCase();
                    });

                const isAdmin = configFunctions
                    .getProperty("users.isAdmin")
                    .some((currentUserName) => {
                        return userNameLowerCase === currentUserName.toLowerCase();
                    });

                const apiKey = await getApiKey(userNameLowerCase);

                userObject = {
                    userName: userNameLowerCase,
                    userProperties: {
                        canUpdate,
                        isAdmin,
                        apiKey
                    }
                };
            }
        }

        if (isAuthenticated && userObject) {
            request.session.user = userObject;

            response.redirect(redirectURL);
        } else {
            response.render("login", {
                userName,
                message: "Login Failed",
                redirect: redirectURL,
                useTestDatabases
            });
        }
    });

export default router;