const jwt = require("jsonwebtoken");
const config = require("../config/auth.config.js");
const db = require("../models/index");
const User = db.user;

const { TokenExpiredError } = jwt;

const catchError = (err, res) => {
    if (err instanceof TokenExpiredError) {
        return res.status(401).send({ message: "Unauthorized! Access Token was expired!" });
    }

    return res.sendStatus(401).send({ message: "Unauthorized!" });
}

const verifyToken = (req, res, next) => {
    let token = req.headers["x-access-token"];

    if (!token) {
        return res.status(403).send({ message: "No token provided!" });
    }

    jwt.verify(token, config.secret, (err, decoded) => {
        if (err) {
            return catchError(err, res);
        }
        req.userId = decoded.id;
        next();
    });
};

const isAdmin = (req, res, next) => {
    User.findByPk(req.userId).then(user => {
        user.getRoles().then(roles => {
            for (let i = 0; i < roles.length; i++) {
                if (roles[i].name === "admin") {
                    next();
                    return;
                }
            }

            res.status(403).send({
                message: "Require Admin Role!"
            });
        });
    });
};

const isCoach = (req, res, next) => {
    User.findByPk(req.userId).then(user => {
        user.getRoles().then(roles => {
            for (let i = 0; i < roles.length; i++) {
                if (roles[i].name === "coach") {
                    next();
                    return;
                }
            }

            res.status(403).send({
                message: "Require Coach Role!"
            });
        });
    });
};

const isCoachOrAdmin = (req, res, next) => {
    User.findByPk(req.userId).then(user => {
        user.getRoles().then(roles => {
            for (let i = 0; i < roles.length; i++) {
                if (roles[i].name === "coach") {
                    next();
                    return;
                }

                if (roles[i].name === "admin") {
                    next();
                    return;
                }
            }

            res.status(403).send({
                message: "Require Coach or Admin Role!"
            });
        });
    });
};

const authJwt = {
    verifyToken: verifyToken,
    isAdmin: isAdmin,
    isModerator: isCoach,
    isModeratorOrAdmin: isCoachOrAdmin
};
module.exports = authJwt;