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

(function()
{
	// Element names specific to this page
	elements.linodeLabel = "linode-label";
	elements.linodeTag = "linode-tag";
	elements.linodeTagLink = "linode-tag-link";
	elements.lmcRow = "lmc-tr3";
	elements.rdnsBody = "rdns-body";
	elements.rdnsTarget = "rdns-target";
	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 = {};

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

	// Temporary state
	var state = {};
	state.numReqs = 0;
	state.numReturns = 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";
		}
	};

	// Callback for linode net info API call
	var displayNetInfo = function(response)
	{
		var ips = response.ipv4["public"];
		ips.push(response.ipv6.slaac);

		// Add IPs to table
		for (var i = 0; i < ips.length; i++) {
			var row = document.createElement("tr");
			row.className = elements.lmcRow;
			var addrCell = document.createElement("td");
			addrCell.innerHTML = ips[i].address;
			var targetCell = document.createElement("td");
			var target = document.createElement("input");
			target.id = ips[i].address;
			target.className = elements.rdnsTarget;
			target.type = "text";
			target.placeholder = "host.yourdomain.com";
			target.size = "36";
			target.value = ips[i].rdns;
			targetCell.appendChild(target);
			row.appendChild(addrCell);
			row.appendChild(targetCell);
			ui.rdnsBody.insertBefore(row, ui.saveRow);
		}

		ui.saveButton.disabled = false;
	};

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

		var targets = document.getElementsByClassName(elements.rdnsTarget);
		state.numReqs = targets.length;
		state.numReturns = 0;

		// Submit request for each IP
		for (var i = 0; i < targets.length; i++) {
			var req = {};
			if (!targets[i].value.length)
				req.rdns = null;
			else
				req.rdns = targets[i].value;

			apiPut("/linode/instances/" + data.params.lid + "/ips/" + targets[i].id, req, function(response) {
				state.numReturns++;
				if (state.numReturns >= state.numReqs)
					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.linodeLabel = document.getElementById(elements.linodeLabel);
		ui.linodeTag = document.getElementById(elements.linodeTag);
		ui.linodeTagLink = document.getElementById(elements.linodeTagLink);
		ui.rdnsBody = document.getElementById(elements.rdnsBody);
		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);
		apiGet("/linode/instances/" + data.params.lid + "/ips", displayNetInfo, null);
	};

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