// ==UserScript==
// @name         AutoLoginClarity
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Automatically pull data out of Riverbed for the previous day.
// @author       joe.tretter@kcc.com
// @match        https://clarity.kcc.com/niku/*
// ==/UserScript==
(function() {
    'use strict';

	// no cleartext password
	function encryptXor(text, key) {
		return Array.from(
			text,
			(c, i) => String.fromCharCode(c.charCodeAt() ^ key.charCodeAt(i % key.length))
		).join('');
	}

	// if the login dialog pops up -> log in.
	function loginThread(credentials) {
   		let myInterval;
		myInterval= window.setInterval(()=>{
            let userNameField = document.getElementById("ppm_login_username");
            let userPasswordField = document.getElementById("ppm_login_password");
            let userLoginButton = document.getElementById("ppm_login_button");

            if (userNameField !== null) {
                // If we don't have credentials saved we ask for credentials.
                // If the login dialog comes up again in less than 10 seconds we assume the password changed and don't retry automatically to prevent account locking.
                if ((credentials === null) || ((localStorage.getItem("LastLoginDate") !== null) && ((new Date().getTime() - localStorage.getItem("LastLoginDate")) / 1000 < 10 ))) {
                    clearInterval(myInterval);
                    window.document.title="[AutoLoginClarity] Login unsuccessful.";
                    console.log("Login unsuccessful.");
                    userLoginButton.value="AutoLoginClarity: Save Credentials + Login";

                    // Credentials are stored encrypted in the Browsen's localstorage (yes, it's NOT safe, but it's a hurdle)
                    userLoginButton.onclick=function(){
                        credentials={username:userNameField.value,passwordCrypt:encryptXor(userPasswordField.value, '5346245634634765377')};
                        localStorage.setItem("Credentials",JSON.stringify(credentials));
                        alert('Credentials Saved.');
                        window.location.reload();
                    };
                    userLoginButton.onkeydown=onclick;
                } else {
                    //window.document.title="[AutoLoginClarity] Logging In";
                    localStorage.setItem("LastLoginDate",new Date().getTime())
                    clearInterval(myInterval);
                    userNameField.value=credentials.username;
                    userPasswordField.value=encryptXor(credentials.passwordCrypt, '5346245634634765377');

                    userLoginButton.click();
                }
            }
        },1000);
    }

	// Password is encrypted with XOR to preent "accidental" revelation
	let credentials=localStorage.getItem("Credentials");
    if (credentials!==null) { credentials=JSON.parse(credentials); }
	loginThread(credentials);

})();