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

(function()
{
	// Element names specific to this page
	elements.failoverTable = "failover-table";
	elements.info = "info";
	elements.linodeLabel = "linode-label";
	elements.linodeTag = "linode-tag";
	elements.linodeTagLink = "linode-tag-link";
	elements.lmcRow = "lmc-tr3";
	elements.loading = "loading";
	elements.saveButton = "save-button";
	elements.saveRow = "save-row";
	elements.subnav = "subnav-link";
	elements.subnavActive = "subnav-link-active";

	// Data recieved from API calls
	var data = {};
	data.linode = {};
	data.linodes = [];

	// Static references to UI elements
	var ui = {};
	ui.failoverTable = {};
	ui.linodeLabel = {};
	ui.linodeTag = {};
	ui.linodeTagLink = {};
	ui.loading = {};
	ui.saveButton = {};
	ui.saveRow = {};

	// Temporary state
	var state = {};
	state.lidIndex = -1;
	state.netInfoCount = 0;

	// Callback for linode details API call
	var displayDetails = function(response)
	{
		data.linode = response;

		// Set page title and header stuff
		document.title += " // " + data.linode.label;
		ui.linodeLabel.innerHTML = data.linode.label;
		if (data.linode.tags.length == 1) {
			ui.linodeTagLink.href = "/linodes?tag=" + data.linode.tags[0];
			ui.linodeTagLink.innerHTML = "(" + data.linode.tags[0] + ")";
			ui.linodeTag.style.display = "inline";
		}

		// Get other Linodes in the same DC
		var filter = {
			"region": data.linode.region
		};
		apiGet("/linode/instances", displayLinodes, filter);
	};

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

		// Request the next page if there are more pages
		if (response.page != response.pages) {
			var filter = {
				"region": data.linode.region
			};
			apiGet("/linode/instances?page=" + (response.page + 1), displayLinodes, filter);
			return;
		}

		// Get net info for each linode
		for (var i = 0; i < data.linodes.length; i++)
			apiGet("/linode/instances/" + data.linodes[i].id + "/ips", displayNetInfo, null);
	};

	// Callback for net info API call
	var displayNetInfo = function(response)
	{
		// Find the associated linode
		var lid = parseInt(response['_endpoint'].split("/")[3]);
		var index = -1;
		for (var i = 0; i < data.linodes.length; i++) {
			if (data.linodes[i].id == lid) {
				index = i;
				break;
			}
		}

		if (i == -1)
			return;
		else if (lid == data.linode.id)
			state.lidIndex = i;

		data.linodes[index].netInfo = response;
		state.netInfoCount++;
		if (state.netInfoCount < data.linodes.length)
			return;

		// Populate the table
		ui.loading.remove();
		for (var i = 0; i < data.linodes.length; i++) {
			if (data.linodes[i].id == data.linode.id)
				continue;

			var ips = data.linodes[i].netInfo.ipv4["public"].concat(data.linodes[i].netInfo.ipv4["private"]);
			for (var j = 0; j < ips.length; j++) {
				var row = document.createElement("tr");
				row.className = elements.lmcRow;
				var nameCell = document.createElement("td");
				nameCell.innerHTML = data.linodes[i].label;
				var ipCell = document.createElement("td");
				var box = document.createElement("input");
				box.id = ips[j].address;
				box.type = "checkbox";
				for (var k = 0; k < data.linodes[state.lidIndex].netInfo.ipv4.shared.length; k++) {
					if (data.linodes[state.lidIndex].netInfo.ipv4.shared[k].address == ips[j].address)
						box.checked = true;
				}
				ipCell.appendChild(box);
				var label = document.createElement("label");
				label.htmlFor = box.id;
				label.innerHTML = " " + ips[j].address;
				ipCell.appendChild(label);
				if (ips[j].rdns) {
					var rdns = document.createElement("span");
					rdns.className = elements.info;
					rdns.innerHTML = " (" + ips[j].rdns + ")";
					ipCell.appendChild(rdns);
				}
				row.appendChild(nameCell);
				row.appendChild(ipCell);
				ui.failoverTable.insertBefore(row, ui.saveRow);
			}
		}

		ui.saveButton.disabled = false;
	};

	// Handler for save button
	var handleSave = function(event)
	{
		if (event.currentTarget.disabled)
			return;

		var ips = [];
		var boxes = document.getElementsByTagName("input");
		for (var i = 0; i < boxes.length; i++) {
			if (boxes[i].checked)
				ips.push(boxes[i].id);
		}

		var req = {
			"ips": ips,
			"linode_id": data.linode.id
		};
		apiPost("/networking/ipv4/share", req, function(response) {
			location.href = "/linodes/remote_access?lid=" + data.params.lid;
		});
	};

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

		// We need a Linode ID, so die if we don't have it
		if (!data.params.lid) {
			alert("No Linode ID supplied!");
			return;
		}

		setupHeader();

		// Update links on page to include proper Linode ID
		var anchors = document.getElementsByTagName("a");
		for (var i = 0; i < anchors.length; i++)
			anchors[i].href = anchors[i].href.replace("lid=0", "lid=" + data.params.lid);

		// Highlight the remote access subnav link
		var subnavLinks = document.getElementsByClassName(elements.subnav);
		for (var i = 0; i < subnavLinks.length; i++) {
			if (subnavLinks[i].pathname == "/linodes/remote_access")
				subnavLinks[i].className += " " + elements.subnavActive;
		}

		// Get element references
		ui.failoverTable = document.getElementById(elements.failoverTable);
		ui.linodeLabel = document.getElementById(elements.linodeLabel);
		ui.linodeTag = document.getElementById(elements.linodeTag);
		ui.linodeTagLink = document.getElementById(elements.linodeTagLink);
		ui.loading = document.getElementById(elements.loading);
		ui.saveButton = document.getElementById(elements.saveButton);
		ui.saveRow = document.getElementById(elements.saveRow);

		// Attach event handlers
		ui.saveButton.addEventListener("click", handleSave);

		// Get data from API
		apiGet("/linode/instances/" + data.params.lid, displayDetails, null);
	};

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