/*
 * 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, regionNames, apiGet, parseParams, setupHeader } from "/global.js";

(function()
{
	// Element names specific to this page
	elements.backupNo = "backup-no";
	elements.backupYes = "backup-yes";
	elements.barRemaining = "bar-remaining";
	elements.barUsed = "bar-used";
	elements.centerCell = "center-cell";
	elements.dashboardLink = "dashboard-link";
	elements.info = "info";
	elements.linodes = "linodes";
	elements.linodeTagPrefix = "linode-tag-";
	elements.lmcRow = "lmc-tr1";
	elements.lmcRowAlt = "lmc-tr2";
	elements.lmcTable = "lmc-table";
	elements.loading = "loading";
	elements.notification = "notification";
	elements.notifications = "notifications";
	elements.subLinks = "sub-links";
	elements.transferQuota = "transfer-quota";
	elements.transferRemaining = "transfer-remaining";
	elements.transferUsed = "transfer-used";

	// Data recieved from API calls
	var data = {};
	data.params = {};
	data.linodes = [];
	data.linodeTags = [];
	data.noTag = false;
	data.notifications = [];
	data.plans = [];

	// Static references to UI elements
	var ui = {};
	ui.linodes = {};
	ui.linodeTables = {};
	ui.loading = {};
	ui.notifications = {};

	var createLinodeRow = function(linode, alt)
	{
		var row = document.createElement("tr");
		if (alt)
			row.className = elements.lmcRowAlt;
		else
			row.className = elements.lmcRow;
		var name = document.createElement("td");
		var nameLink = document.createElement("a");
		nameLink.href = "/linodes/dashboard?lid=" + linode.id;
		nameLink.innerHTML = linode.label;
		name.appendChild(nameLink);
		var status = document.createElement("td");
		status.innerHTML = linode.status.charAt(0).toUpperCase() + linode.status.slice(1).replace(/_/g, " ");
		var plan = document.createElement("td");
		if (linode.type)
			plan.innerHTML = getPlanLabel(linode.type);
		else
			plan.innerHTML = "Unknown";
		if (plan.innerHTML == "")
			translatePlan(linode.type, plan);
		var ip = document.createElement("td");
		ip.innerHTML = linode.ipv4[0];
		var ipCount = 0;
		for (var i = 1; i < linode.ipv4.length; i++) {
			if (linode.ipv4[i].startsWith("192.168."))
				continue;
			if (linode.ipv4[i].startsWith("10."))
				continue;
			ipCount++;
		}
		if (ipCount) {
			var plus = document.createElement("span");
			plus.className = elements.info;
			plus.innerHTML = " (+" + ipCount + ")";
			ip.appendChild(plus);
		}
		var region = document.createElement("td");
		if (regionNames[linode.region])
			region.innerHTML = regionNames[linode.region];
		else
			region.innerHTML = linode.region;
		var backups = document.createElement("td");
		backups.className = elements.centerCell;
		if (linode.backups.enabled) {
			var backupStatus = document.createElement("span");
			backupStatus.className = elements.backupYes;
			backupStatus.innerHTML = "Yes";
			backups.appendChild(backupStatus);
		} else {
			var backupStatus = document.createElement("span");
			backupStatus.className = elements.backupNo;
			backupStatus.innerHTML = "No";
			var backupSeparator = document.createElement("span");
			backupSeparator.innerHTML = " - ";
			var backupLink = document.createElement("a");
			backupLink.href = "/linodes/backups_enable?lid=" + linode.id;
			backupLink.innerHTML = "Enable";
			backups.appendChild(backupStatus);
			backups.appendChild(backupSeparator);
			backups.appendChild(backupLink);
		}
		var options = document.createElement("td");
		options.className = elements.centerCell;
		var dashboardLink = document.createElement("a");
		dashboardLink.className = elements.dashboardLink;
		dashboardLink.href = "/linodes/dashboard?lid=" + linode.id;
		dashboardLink.innerHTML = "Dashboard";
		var optionsSeparator = document.createElement("span");
		optionsSeparator.innerHTML = " | ";
		var removeLink = document.createElement("a");
		removeLink.href = "/linodes/remove?lid=" + linode.id;
		removeLink.innerHTML = "Remove";
		options.appendChild(dashboardLink);
		options.appendChild(optionsSeparator);
		options.appendChild(removeLink);
		row.appendChild(name);
		row.appendChild(status);
		row.appendChild(plan);
		row.appendChild(ip);
		row.appendChild(region);
		row.appendChild(backups);
		row.appendChild(options);

		return row;
	};

	var createLinodeTable = function(tag)
	{
		var table = document.createElement("table");
		table.id = elements.linodeTagPrefix + tag;
		table.className = elements.lmcTable;
		var thead = document.createElement("thead");
		var headRow1 = document.createElement("tr");
		var title = document.createElement("td");
		if (tag.length == 0)
			title.innerHTML = "Linodes";
		else
			title.innerHTML = tag;
		headRow1.appendChild(title);
		var headRow2 = document.createElement("tr");
		var cells = ["Linode", "Status", "Plan", "IP", "Location", "Backups", "Options"];
		title.colSpan = cells.length;
		for (var i = 0; i < cells.length; i++) {
			var cell = document.createElement("td");
			if (cells[i] == "Backups" || cells[i] == "Options")
				cell.className = elements.centerCell;
			cell.innerHTML = cells[i];
			headRow2.appendChild(cell);
		}
		thead.appendChild(headRow1);
		thead.appendChild(headRow2);
		var tbody = document.createElement("tbody");
		table.appendChild(thead);
		table.appendChild(tbody);
		ui.linodeTables[tag] = tbody;

		var subLinks = document.createElement("p");
		subLinks.className = elements.subLinks;
		var volumes = document.createElement("a");
		volumes.href = "/volumes";
		volumes.innerHTML = "Manage Volumes";
		var separator = document.createElement("span");
		separator.innerHTML = " | ";
		var images = document.createElement("a");
		images.href = "/images";
		images.innerHTML = "Manage Images";
		var stackScripts = document.createElement("a");
		stackScripts.href = "/stackscripts";
		stackScripts.innerHTML = "Manage StackScripts";
		var addLinode = document.createElement("a");
		addLinode.href = "/linodes/add";
		if (tag.length > 0)
			addLinode.href += "?tag=" + tag;
		addLinode.innerHTML = "Add a Linode";
		subLinks.appendChild(volumes);
		subLinks.appendChild(separator);
		subLinks.appendChild(images);
		subLinks.appendChild(separator.cloneNode(true));
		subLinks.appendChild(stackScripts);
		subLinks.appendChild(separator.cloneNode(true));
		subLinks.appendChild(addLinode);

		ui.linodes.appendChild(table);
		ui.linodes.appendChild(subLinks);
	};

	var displayLinodes = function(response)
	{
		// Add linodes to array
		data.linodes = data.linodes.concat(response.data);

		// Add new tags to array
		for (var i = 0; i < response.data.length; i++) {
			if (response.data[i].tags.length == 0)
				data.noTag = true;

			for (var j = 0; j < response.data[i].tags.length; j++) {
				if (!data.linodeTags.includes(response.data[i].tags[j]))
					data.linodeTags.push(response.data[i].tags[j]);
			}
		}

		// Request the next page if there are more pages
		if (response.page != response.pages) {
			var progress = (response.page / response.pages) * 100;
			progress = progress.toFixed(0);
			ui.loading.innerHTML = "Loading " + progress + "%...";
			var filters = null;
			if (data.params.tag)
				filters = {
					"tags": data.params.tag
				};
			apiGet("/linode/instances?page=" + (response.page + 1), displayLinodes, filters);
			return;
		}

		// Redirect to add page if there are no linodes
		if (data.linodes.length == 0)
			location.href = "/linodes/add";

		// Sort
		data.linodeTags.sort();
		data.linodes.sort(function(a, b)
		{
			return a.label.toLowerCase().localeCompare(b.label.toLowerCase());
		});

		// Create tables
		ui.loading.remove();
		if (data.noTag)
			createLinodeTable("");
		for (var i = 0; i < data.linodeTags.length; i++)
			createLinodeTable(data.linodeTags[i]);

		// Insert linodes
		for (var i = 0; i < data.linodes.length; i++) {
			if (data.linodes[i].tags.length == 0)
				ui.linodeTables[""].appendChild(createLinodeRow(data.linodes[i], ui.linodeTables[""].children.length % 2));

			for (var j = 0; j < data.linodes[i].tags.length; j++)
				ui.linodeTables[data.linodes[i].tags[j]].appendChild(createLinodeRow(data.linodes[i], ui.linodeTables[data.linodes[i].tags[j]].children.length % 2));
		}
	};

	var displayNotifications = function(response)
	{
		// Add notifications to array
		data.notifications = data.notifications.concat(response.data);

		// Request the next page if there are more pages
		if (response.page != response.pages) {
			apiGet("/account/notifications?page=" + (response.page + 1), displayNotifications, null);
			return;
		}

		// Display notifications
		for (var i = 0; i < data.notifications.length; i++) {
			if (data.notifications[i].entity && data.notifications[i].entity.type == "linode")
				continue;

			var notification = document.createElement("div");
			notification.className = elements.notification;
			var header = document.createElement("h1");
			header.innerHTML = data.notifications[i].label;
			var body = document.createElement("p");
			body.innerHTML = data.notifications[i].message;
			notification.appendChild(header);
			notification.appendChild(body);
			ui.notifications.appendChild(notification);
		}
	};

	var displayTransfer = function(response)
	{
		var barRemaining = document.getElementById(elements.barRemaining);
		var barUsed = document.getElementById(elements.barUsed);
		var transferQuota = document.getElementById(elements.transferQuota);
		var transferRemaining = document.getElementById(elements.transferRemaining);
		var transferUsed = document.getElementById(elements.transferUsed);

		// Get border width of bar segments from CSS sheet
		var remainingBorderWidth = 0;
		var usedBorderWidth = 0;
		for (var i = 0; i < document.styleSheets[0].cssRules.length; i++) {
			if (document.styleSheets[0].cssRules[i].selectorText == "#" + elements.barRemaining)
				remainingBorderWidth = Number.parseInt(document.styleSheets[0].cssRules[i].style.borderWidth) * 2;
			else if (document.styleSheets[0].cssRules[i].selectorText == "#" + elements.barUsed)
				usedBorderWidth = Number.parseInt(document.styleSheets[0].cssRules[i].style.borderWidth) * 2;
		}

		var usage = (response.used / response.quota) * 100;
		usage = usage.toFixed(0);

		if (usage != 0) {
			barUsed.style = "display: inline-block; width: calc(" + usage + "% - " + usedBorderWidth + "px);";
			barUsed.innerHTML = usage + "% Used";
		}
		if (usage != 100) {
			barRemaining.style = "display: inline-block; width: calc(" + (100 - usage) + "% - " + remainingBorderWidth + "px);";
			barRemaining.innerHTML = (100 - usage) + "% Remaining";
		}

		transferUsed.innerHTML = response.used + "GB";
		transferRemaining.innerHTML = (response.quota - response.used) + "GB";
		transferQuota.innerHTML = response.quota + "GB";
	};

	var getPlanLabel = function(id)
	{
		for (var i = 0; i < data.plans.length; i++) {
			if (id == data.plans[i].id)
				return data.plans[i].label;
		}

		return "";
	};

	var getPlans = function(response)
	{
		// Add plans to array
		data.plans = data.plans.concat(response.data);

		// Request the next page if there are more pages
		if (response.page != response.pages) {
			apiGet("/linode/types?page=" + (response.page + 1), getPlans, null);
			return;
		}

		// Get linodes
		var filters = null;
		if (data.params.tag)
			filters = {
				"tags": data.params.tag
			};
		apiGet("/linode/instances", displayLinodes, filters);
	};

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

		ui.linodes = document.getElementById(elements.linodes);
		ui.loading = document.getElementById(elements.loading);
		ui.notifications = document.getElementById(elements.notifications);

		setupHeader();

		// Get linode and transfer info
		apiGet("/linode/types", getPlans, null);
		apiGet("/account/transfer", displayTransfer, null);
		apiGet("/account/notifications", displayNotifications, null);
	};

	var translatePlan = function(name, cell)
	{
		var callback = function(response)
		{
			cell.innerHTML = response.label;
		};

		apiGet("/linode/types/" + name, callback, null);
	};

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