'use strict';

// use environment variable DEBUG with value 'xssec:*' for trace/error messages
var debug = require('debug');
var debugTrace = debug('xssec:securitycontext');
var debugError = debug('xssec:securitycontext');
const {JwtTokenValidatorIAS} = require('../validator')

debugError.log = console.error.bind(console);
debugTrace.log = console.log.bind(console);

module.exports.SecurityContext = function(config, configArr) {
    this.getConfigType = function () {
        return "IAS";
    }

    var token = null;
    var tokenInfo = null;

    var userInfo = {
        logonName: '',
        givenName: '',
        familyName: '',
        email: ''
    };

    this.getUserInfo = function() {
        return userInfo;
    }

    this.getAppToken = function () {
        return token;
    };

    this.getTokenInfo = function () {
        return tokenInfo;
    }

    this.getLogonName = function () {
        return userInfo.logonName;
    };

    this.getGivenName = function () {
        return userInfo.givenName;
    };

    this.getFamilyName = function () {
        return userInfo.familyName;
    };

    this.getEmail = function () {
        return userInfo.email;
    };
    
    this.verifyToken = function (encodedToken, attributes, cb) {
        const validator = new JwtTokenValidatorIAS(configArr, config, attributes);

        validator.validateToken(encodedToken, function (err, tokenInfo) {
            if (err) {
                try {
                    cb(err, null, tokenInfo);
                } catch(e) {
                    debugError("xssec: Unhandled Exception in Callback");
                    debugError(e);
                }

                return;
            }

            tokenInfo = tokenInfo;
            token = encodedToken;

            const decodedToken = tokenInfo.getPayload();
            let givenName, familyName;
            if (decodedToken.ext_attr) {
                givenName = decodedToken.ext_attr.given_name || null;
                familyName = decodedToken.ext_attr.family_name || null;
            }

            userInfo.givenName = givenName || decodedToken.given_name || '';
            userInfo.familyName = familyName || decodedToken.family_name || '';
            userInfo.email = decodedToken.email || '';            
            userInfo.logonName = decodedToken.user_name || decodedToken.email || decodedToken.user_uuid || '';         

            try {
                cb(null, this, tokenInfo);
            } catch(e) {
                debugError("xssec: Unhandled Exception in Callback");
                debugError(e);
            }
        }.bind(this));
    };
};