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

(function()
{
	// Element names specific to this page
	elements.ipFailover = "ip-failover";
	elements.ipRemove = "ip-remove";
	elements.ipSwap = "ip-swap";
	elements.ipv4Addrs = "ipv4-addrs";
	elements.ipv4Gateways = "ipv4-gateways";
	elements.linkLocal = "link-local";
	elements.linodeLabel = "linode-label";
	elements.linodeTag = "linode-tag";
	elements.linodeTagLink = "linode-tag-link";
	elements.lishLink = "lish-link";
	elements.privateIPGuide = "private-ips-guide";
	elements.privateIPs = "private-ips";
	elements.resolvers = "resolvers";
	elements.slaacAddr = "slaac-addr";
	elements.slaacGateway = "slaac-gateway";
	elements.slaacPrefix = "slaac-prefix";
	elements.slaacRdns = "slaac-rdns";
	elements.sshLink = "ssh-link";

	// Data recieved from API calls
	var data = {};
	data.linode = {};
	data.netInfo = {};

	// Static references to UI elements
	var ui = {};
	ui.ipFailover = {};
	ui.ipRemove = {};
	ui.ipSwap = {};
	ui.ipv4Addrs = {};
	ui.ipv4Gateways = {};
	ui.linkLocal = {};
	ui.linodeLabel = {};
	ui.linodeTag = {};
	ui.linodeTagLink = {};
	ui.lishLink = {};
	ui.privateIPGuide = {};
	ui.privateIPs = {};
	ui.resolvers = {};
	ui.slaacAddr = {};
	ui.slaacGateway = {};
	ui.slaacPrefix = {};
	ui.slaacRdns = {};
	ui.sshLink = {};

	// 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";
		}

		// Replace user in SSH link if we're running CoreOS Container Linux
		if (data.linode.image == "linode/containerlinux") {
			ui.sshLink.href = ui.sshLink.href.replace("root", "core");
			ui.sshLink.innerHTML = ui.sshLink.innerHTML.replace("root", "core");
		}

		// Get list of other instances in the same region
		var filters = {
			"region": data.linode.region
		};
		apiGet("/linode/instances", displayIPLinks, filters);

		// Get region info to display resolvers
		apiGet("/regions/" + data.linode.region, displayResolvers, null);

		// Update the LISH link
		ui.lishLink.href = ui.lishLink.href.replace("lish-", "lish-" + data.linode.region);
		ui.lishLink.innerHTML = ui.lishLink.innerHTML.replace("lish-", "lish-" + data.linode.region);
		ui.lishLink.innerHTML += " " + data.linode.label;
	};

	// Callback for regional instances API call
	var displayIPLinks = function(response)
	{
		// Only enable IP failover and swap links if there are 2 or more instances in this location
		if (response.data.length < 2)
			return;

		var ipFailover = document.createElement("a");
		ipFailover.href = "/linodes/ip_failover?lid=" + data.params.lid;
		ipFailover.innerHTML = "IP Failover";
		ui.ipFailover.replaceWith(ipFailover);

		var ipSwap = document.createElement("a");
		ipSwap.href = "/linodes/ip_swap?lid=" + data.params.lid;
		ipSwap.innerHTML = "IP Swap";
		ui.ipSwap.replaceWith(ipSwap);
	};

	// Callback for user info API call
	var displayLishUser = function(response)
	{
		// Insert username into LISH link
		ui.lishLink.href = ui.lishLink.href.replace("@", response.username + "@");
		ui.lishLink.innerHTML = ui.lishLink.innerHTML.replace("@", response.username + "@");
	};

	// Callback for network info API call
	var displayNetInfo = function(response)
	{
		data.netInfo = response;

		// Set SSH link
		// CoreOS Container Linux uses core instead of root
		var user = "root";
		if (data.linode && data.linode.image == "linode/containerlinux")
			user = "core";
		if (data.netInfo.ipv4["public"].length > 0) {
			ui.sshLink.href = "ssh://" + user + "@" + data.netInfo.ipv4["public"][0].address;
			ui.sshLink.innerHTML = "ssh " + user + "@" + data.netInfo.ipv4["public"][0].address;
		}

		// Show public IPv4 info
		for (var i = 0; i < data.netInfo.ipv4["public"].length; i++) {
			var ipinfo = document.createElement("span");
			ipinfo.innerHTML = data.netInfo.ipv4["public"][i].address + " / " + data.netInfo.ipv4["public"][i].prefix + " ( " + data.netInfo.ipv4["public"][i].rdns + " )";
			var gateway = document.createElement("span");
			gateway.innerHTML = data.netInfo.ipv4["public"][i].gateway;
			var br = document.createElement("br");
			ui.ipv4Addrs.appendChild(ipinfo);
			ui.ipv4Addrs.appendChild(br);
			ui.ipv4Gateways.appendChild(gateway);
			ui.ipv4Gateways.appendChild(br.cloneNode(false));
		}

		// Show public IPv6 info
		ui.slaacAddr.innerHTML = data.netInfo.ipv6.slaac.address;
		ui.slaacGateway.innerHTML = data.netInfo.ipv6.slaac.gateway;
		ui.slaacPrefix.innerHTML = data.netInfo.ipv6.slaac.prefix;
		ui.slaacRdns.innerHTML = data.netInfo.ipv6.slaac.rdns;

		// Enable IP remove link if multiple IPv4s
		if (data.netInfo.ipv4["public"].length > 1) {
			var ipRemove = document.createElement("a");
			ipRemove.href = "/linodes/ip_remove?lid=" + data.params.lid;
			ipRemove.innerHTML = "IP Remove";
			ui.ipRemove.replaceWith(ipRemove);
		}

		// Display private IP info
		if (data.netInfo.ipv4["private"].length > 0) {
			ui.privateIPs.innerHTML = "";
			ui.privateIPGuide.style.visibility = "visible";
		}
		for (var i = 0; i < data.netInfo.ipv4["private"].length; i++) {
			var ip = document.createElement("span");
			ip.innerHTML = data.netInfo.ipv4["private"][i].address + " / " + data.netInfo.ipv4["private"][i].prefix;
			var br = document.createElement("br");
			ui.privateIPs.appendChild(ip);
			ui.privateIPs.appendChild(br);
		}

		// Display link-local IPv6 address
		ui.linkLocal.innerHTML = data.netInfo.ipv6.link_local.address + " / " + data.netInfo.ipv6.link_local.prefix;
	};

	// Callback for region info API call
	var displayResolvers = function(response)
	{
		var resolvers = response.resolvers.ipv4.split(",").concat(response.resolvers.ipv6.split(","));
		for (var i = 0; i < resolvers.length; i++) {
			var resolver = document.createElement("span");
			resolver.innerHTML = resolvers[i];
			var br = document.createElement("br");
			ui.resolvers.appendChild(resolver);
			ui.resolvers.appendChild(br);
		}
	};

	// 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=00", data.params.lid);
			anchors[i].href = anchors[i].href.replace("lid=0", "lid=" + data.params.lid);
		}

		// Get element references
		ui.ipFailover = document.getElementById(elements.ipFailover);
		ui.ipRemove = document.getElementById(elements.ipRemove);
		ui.ipSwap = document.getElementById(elements.ipSwap);
		ui.ipv4Addrs = document.getElementById(elements.ipv4Addrs);
		ui.ipv4Gateways = document.getElementById(elements.ipv4Gateways);
		ui.linkLocal = document.getElementById(elements.linkLocal);
		ui.linodeLabel = document.getElementById(elements.linodeLabel);
		ui.linodeTag = document.getElementById(elements.linodeTag);
		ui.linodeTagLink = document.getElementById(elements.linodeTagLink);
		ui.lishLink = document.getElementById(elements.lishLink);
		ui.privateIPGuide = document.getElementById(elements.privateIPGuide);
		ui.privateIPs = document.getElementById(elements.privateIPs);
		ui.resolvers = document.getElementById(elements.resolvers);
		ui.slaacAddr = document.getElementById(elements.slaacAddr);
		ui.slaacGateway = document.getElementById(elements.slaacGateway);
		ui.slaacPrefix = document.getElementById(elements.slaacPrefix);
		ui.slaacRdns = document.getElementById(elements.slaacRdns);
		ui.sshLink = document.getElementById(elements.sshLink);

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

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