/*
 * This file is part of Linode Manager Classic.
 *
 * Linode Manager Classic 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.
 *
 * Linode Manager Classic 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 Linode Manager Classic.  If not, see <https://www.gnu.org/licenses/>.
 */

import { settings, elements, apiDelete, apiGet, apiPost, parseParams, setupHeader, timeString } from "/global.js";

(function()
{
	// Element names specific to this page
	elements.pwReset = "pw-reset";
	elements.tfa = "tfa";
	elements.tfaDisable = "tfa-disable";
	elements.tfaEnable = "tfa-enable";
	elements.tfaStatus = "tfa-status";
	elements.trusted = "trusted";
	elements.untrust = "untrust";

	// Data received from API calls
	var data = {};

	// Static references to UI elements
	var ui = {};
	ui.pwReset = {};
	ui.tfa = [];
	ui.tfaDisable = {};
	ui.tfaEnable = {};
	ui.tfaStatus = {};
	ui.trusted = {};

	// Creates a row for the trusted devices list
	var createTrustedRow = function(device)
	{
		var row = document.createElement("div");
		row.id = elements.trusted + "-" + device.id;
		var br = document.createElement("br");
		row.appendChild(br);

		var userAgent = document.createElement("span");
		userAgent.innerHTML = device.user_agent;
		row.appendChild(userAgent);
		row.appendChild(br.cloneNode(true));

		var lastAuth = document.createElement("span");
		var now = new Date();
		var authDt = new Date(device.last_authenticated + "Z");
		lastAuth.innerHTML = "Last authenticated " + timeString(now - authDt, true) + " from " + device.last_remote_addr;
		row.appendChild(lastAuth);
		row.appendChild(br.cloneNode(true));

		var expiry = document.createElement("span");
		var expireDt = new Date(device.expiry + "Z");
		expiry.innerHTML = "Expires in " + timeString(expireDt - now, false) + " - ";
		row.appendChild(expiry);

		var untrust = document.createElement("a");
		untrust.id = elements.untrust + "-" + device.id;
		untrust.href = "#";
		untrust.innerHTML = "untrust";
		untrust.addEventListener("click", handleUntrust);
		row.appendChild(untrust);

		return row;
	};

	// Callback for profile API call
	var displayProfile = function(response)
	{
		ui.pwReset.href += response.username;
		if (response.two_factor_auth) {
			apiGet("/profile/devices", displayTrusted, null);
			ui.tfaStatus.innerHTML = "Enabled";
			ui.tfaEnable.innerHTML = "Reset Two-Factor Authentication";
			for (var i = 0; i < ui.tfa.length; i++) {
				if (ui.tfa[i].tagName == "TR")
					ui.tfa[i].style.display = "table-row";
				else
					ui.tfa[i].style.display = "initial";
			}
		} else {
			ui.tfaStatus.innerHTML = "Disabled";
		}

		ui.tfaEnable.disabled = false;
	};

	// Callback for trusted devices API call
	var displayTrusted = function(response)
	{
		for (var i = 0; i < response.data.length; i++)
			ui.trusted.appendChild(createTrustedRow(response.data[i]));
	};

	// Click handler for disable 2FA link
	var handleDisableTFA = function(event)
	{
		if (!confirm("Are you sure you want to disable two-factor authentication?"))
			return;

		apiPost("/profile/tfa-disable", {}, function(response)
		{
			location.reload();
		});
	};

	// Click handler for enable/reset 2FA button
	var handleEnableTFA = function(event)
	{
		if (event.currentTarget.disabled)
			return;

		location.href = "/profile/twofactor";
	};

	// Click handler for untrust links
	var handleUntrust = function(event)
	{
		var deviceID = parseInt(event.currentTarget.id.split("-")[1]);
		apiDelete("/profile/devices/" + deviceID, function(response)
		{
			var row = document.getElementById(elements.trusted + "-" + deviceID);
			row.remove();
		});
	};

	// Initial setup
	var setup = function()
	{
		// Parse URL parameters
		data.params = parseParams();

		setupHeader();

		// Get element references
		ui.pwReset = document.getElementById(elements.pwReset);
		ui.tfa = document.getElementsByClassName(elements.tfa);
		ui.tfaDisable = document.getElementById(elements.tfaDisable);
		ui.tfaEnable = document.getElementById(elements.tfaEnable);
		ui.tfaStatus = document.getElementById(elements.tfaStatus);
		ui.trusted = document.getElementById(elements.trusted);

		// Register event handlers
		ui.tfaDisable.addEventListener("click", handleDisableTFA);
		ui.tfaEnable.addEventListener("click", handleEnableTFA);

		// Get data from API
		apiGet("/profile", displayProfile, null);
	};

	// Attach onload handler
	window.addEventListener("load", setup);
})();