import jwt from "jsonwebtoken";

export const validateRegister = (req, res, next) => {
    // full name empty
    if (!req.body.fullName) {
        return res.status(400).send({
            message: 'Please enter a full name',
        });
    }
    // rather an email nor a phonenumber
    if (!req.body.email && !req.body.phonenumber) {
        return res.status(400).send({
            message: 'Please enter an email or a phonenumber',
        });
    }
    // validate email
    if (req.body.email && !(validateEMail(req.body.email))) {
        return res.status(400).send({
            message: 'Please choose a valid email',
        });
    }
    // validate phonenumber
    if (req.body.phonenumber && !(validatePhonenumber(req.body.phonenumber))) {
        return res.status(400).send({
            message: 'Please choose a valid phonenumber',
        });
    }
    // username min length 5
    if (!req.body.username || req.body.username.length < 5) {
        return res.status(400).send({
            message: 'Please enter an username with min. 5 chars',
        });
    }
    // password min 8 chars
    if (!req.body.password || req.body.password.length < 8) {
        return res.status(400).send({
            message: 'Please enter a password with min. 8 chars',
        });
    }
    // password (repeat) must match
    if (req.body.password != req.body.password_repeat) {
        return res.status(400).send({
            message: 'Both passwords must match',
        });
    }
    next();
};

export const isLoggedIn = (req, res, next) => {
    if (!req.headers.authorization) {
        return res.status(400).send({
            message: 'Your session is not valid!',
        });
    }
    try {
        const authHeader = req.headers.authorization;
        const token = authHeader.split(' ')[1];
        const decoded = jwt.verify(token, 'SECRETTUEITKEY');
        req.userData = decoded;
        next();
    } catch (err) {
        return res.status(400).send({
            message: 'Authority to access this resource missing',
        });
    }
}

// to validate the email
function validateEMail(email) {
    const emailRegex = /^[A-Za-z0-9_!#$%&'*+\/=?`{|}~^.-]+@[A-Za-z0-9.-]+$/;
    if (email === "") {
        return true;
    }
    return emailRegex.test(email);
};

// to validate the phonenumber
function validatePhonenumber(number) {
    const mobilephonenumberRegex = new RegExp(/^(((((00|\+){1,2})49([ \-/]?|[ \()/]?))|0)[1]([0-2]|[4-7])([0-9]{1})([ \-/]?|[ \()/]?)([0-9]{8}))$/, "gm");
    const landlineRegex = new RegExp(/^0(30|40|69|89|20[12389]|21[24]|228|234|335|340|3[3-9][15]|906|[2-9][1-9]1|3(?:3(?:[0237][127]|0[3-6]|2[89]|3[458]|[46][1246]|7[589]|8[1256]|9[145])|4(?:[2347][135]|[34]7|[69][146]|48|62|76|93)|5(?:[04679][14]|[238][135]|[2469]2|[4789]6|[278]8|63|73|37|29)|6(?:[024689][13]|[03789]5|06|2[2489]|3[1246]|44|47|7[1279]|82|86)|7(?:[236][135]|2[2467]|37|4[145]|62|64|7[1-4])|8(?:[234678]1|3[468]|4[347]|6[035-9]|7[467]|83|86)|9(?:[236][135]|[04689]4|[04789]1|[03468]7|02|09|28|4[369]|6[2689]|73|76|96|98))|3[3-9][0-9]{3}|13[078]|180[235]|18[01]|19[0-9]{3}|[789]00|[2-9][0-9]{3})([0-9]{1,})$/, "gm");
    if (number === "") {
        return true
    }
    if (mobilephonenumberRegex.test(number)) {
        return true
    } else if (landlineRegex.test(number)) {
        return true;
    }
    return false;
};