/*****************************************************************************
#                                                                            #
#    KVMD - The main Pi-KVM daemon.                                          #
#                                                                            #
#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
#                                                                            #
#    This program is free software: you can redistribute it and/or modify    #
#    it under the terms of the GNU General Public License as published by    #
#    the Free Software Foundation, either version 3 of the License, or       #
#    (at your option) any later version.                                     #
#                                                                            #
#    This program is distributed in the hope that it will be useful,         #
#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
#    GNU General Public License for more details.                            #
#                                                                            #
#    You should have received a copy of the GNU General Public License       #
#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
#                                                                            #
*****************************************************************************/


var wm;

function main() {
	if (checkBrowser()) {
		wm = new WindowManager();

		tools.setOnClick($("login-button"), __login);
		$("user-input").onkeyup = $("passwd-input").onkeyup = function(event) {
			if (event.code === "Enter") {
				event.preventDefault();
				$("login-button").click();
			}
		};

		$("user-input").focus();
	}
}

function __login() {
	var user = $("user-input").value;
	if (user.length === 0) {
		$("user-input").focus();
	} else {
		var passwd = $("passwd-input").value;
		var body = `user=${encodeURIComponent(user)}&passwd=${encodeURIComponent(passwd)}`;
		var http = tools.makeRequest("POST", "/kvmd/auth/login", function() {
			if (http.readyState === 4) {
				if (http.status === 200) {
					document.location.href = "/";
				} else if (http.status === 403) {
					wm.error("Invalid username or password").then(__tryAgain);
				} else {
					wm.error("Login error:<br>", http.responseText).then(__tryAgain);
				}
			}
		}, body, "application/x-www-form-urlencoded");
		__setDisabled(true);
	}
}

function __setDisabled(disabled) {
	wm.switchDisabled($("user-input"), disabled);
	wm.switchDisabled($("passwd-input"), disabled);
	wm.switchDisabled($("login-button"), disabled);
}

function __tryAgain() {
	__setDisabled(false);
	$("passwd-input").focus();
	$("passwd-input").select();
}