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

(function()
{
	// Element names specific to this page
	elements.address = "address";
	elements.configLabel = "config-label";
	elements.label = "label";
	elements.mode = "mode";
	elements.nodebalancerLabel = "nodebalancer-label";
	elements.nodebalancerTag = "nodebalancer-tag";
	elements.nodebalancerTagLink = "nodebalancer-tag-link";
	elements.port = "port";
	elements.saveButton = "save-button";
	elements.weight = "weight";

	// Data recieved from API calls
	var data = {};
	data.config = {};
	data.linodeFilters = {
		"ipv4": {
			"+contains": "192.168"
		}
	};
	data.linodes = [];
	data.nodebalancer = {};
	data.node = {};

	// Static references to UI elements
	var ui = {};
	ui.address = {};
	ui.configLabel = {};
	ui.label = {};
	ui.mode = {};
	ui.nodebalancerLabel = {};
	ui.nodebalancerTag = {};
	ui.nodebalancerTagLink = {};
	ui.port = {};
	ui.saveButton = {};
	ui.weight = {};

	// Callback for config API call
	var displayConfig = function(response)
	{
		data.config = response;

		ui.configLabel.innerHTML = "Port " + data.config.port;
		if (!parseInt(data.params.nbnid))
			ui.port.value = data.config.port;
	};

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

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

		// Add linodes to address selector
		for (var i = 0; i < data.linodes.length; i++) {
			var ipIndex = -1;
			for (var j = 0; j < data.linodes[i].ipv4.length; j++) {
				if (data.linodes[i].ipv4[j].indexOf("192.168.") == 0) {
					ipIndex = j;
					break;
				}
			}
			if (ipIndex == -1)
				continue;

			var option = document.createElement("option");
			option.value = data.linodes[i].ipv4[j];
			option.innerHTML = data.linodes[i].ipv4[j] + " (" + data.linodes[i].label + ")";
			ui.address.appendChild(option);
		}

		if (parseInt(data.params.nbnid))
			apiGet("/nodebalancers/" + data.params.nbid + "/configs/" + data.params.nbcid + "/nodes/" + data.params.nbnid, displayNode, null);
		else
			ui.saveButton.disabled = false;
	};

	// Callback for nodebalancer API call
	var displayNodebalancer = function(response)
	{
		data.nodebalancer = response;

		// Set page title and header stuff
		if (document.title.indexOf("//") == -1)
			document.title += " // Edit " + data.nodebalancer.label;
		ui.nodebalancerLabel.innerHTML = data.nodebalancer.label;
		if (data.nodebalancer.tags.length == 1) {
			ui.nodebalancerTagLink.href = "/nodebalancers?tag=" + data.nodebalancer.tags[0];
			ui.nodebalancerTagLink.innerHTML = "(" + data.nodebalancer.tags[0] + ")";
			ui.nodebalancerTag.style.display = "inline";
		} else {
			ui.nodebalancerTag.style.display = "none";
		}

		// Get linodes
		data.linodeFilters.region = data.nodebalancer.region;
		apiGet("/linode/instances", displayLinodes, data.linodeFilters);
	};

	// Callback for node API call
	var displayNode = function(response)
	{
		data.node = response;

		ui.label.value = data.node.label;
		var lastColon = data.node.address.lastIndexOf(":");
		ui.address.value = data.node.address.slice(0, lastColon);
		ui.port.value = data.node.address.slice(lastColon + 1);
		ui.weight.value = data.node.weight;
		ui.mode.value = data.node.mode;

		ui.saveButton.disabled = false;
	};

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

		if (ui.address.value == "0")
			return;

		var req = {
			"label": ui.label.value,
			"address": ui.address.value + ":" + ui.port.value,
			"weight": parseInt(ui.weight.value),
			"mode": ui.mode.value
		};

		if (data.params.nbnid == 0) {
			apiPost("/nodebalancers/" + data.params.nbid + "/configs/" + data.params.nbcid + "/nodes", req, function(response)
			{
				location.href = "/nodebalancers/config?nbid=" + data.params.nbid + "&nbcid=" + data.params.nbcid;
			});
		} else {
			apiPut("/nodebalancers/" + data.params.nbid + "/configs/" + data.params.nbcid + "/nodes/" + data.params.nbnid, req, function(response)
			{
				location.href = "/nodebalancers/config?nbid=" + data.params.nbid + "&nbcid=" + data.params.nbcid;
			});
		}
	};

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

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

		// We also need a config ID
		if (!data.params.nbcid) {
			alert("No config ID supplied!");
			return;
		}

		// We also need a node ID
		if (!data.params.nbnid) {
			alert("No node 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("nbid=0", "nbid=" + data.params.nbid);
			anchors[i].href = anchors[i].href.replace("nbcid=0", "nbcid=" + data.params.nbcid);
		}

		// Get element references
		ui.address = document.getElementById(elements.address);
		ui.configLabel = document.getElementById(elements.configLabel);
		ui.label = document.getElementById(elements.label);
		ui.mode = document.getElementById(elements.mode);
		ui.nodebalancerLabel = document.getElementById(elements.nodebalancerLabel);
		ui.nodebalancerTag = document.getElementById(elements.nodebalancerTag);
		ui.nodebalancerTagLink = document.getElementById(elements.nodebalancerTagLink);
		ui.port = document.getElementById(elements.port);
		ui.saveButton = document.getElementById(elements.saveButton);
		ui.weight = document.getElementById(elements.weight);

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

		// Get data from API
		apiGet("/nodebalancers/" + data.params.nbid, displayNodebalancer, null);
		apiGet("/nodebalancers/" + data.params.nbid + "/configs/" + data.params.nbcid, displayConfig, null);
	};

	// Show/hide check rows
	var showHideChecks = function(event)
	{
		for (var i = 0; i < ui.checkShow.length; i++) {
			if (ui.checkShow[i].classList.contains(elements.checkShow + "-" + ui.checkType.value))
				ui.checkShow[i].style.display = "table-row";
			else
				ui.checkShow[i].style.display = "none";
		}
	};

	// Show/hide protocol stuff
	var showHideProtocol = function(event)
	{
		for (var i = 0; i < ui.protocolShow.length; i++) {
			if (ui.protocolShow[i].classList.contains(elements.protocolShow + "-" + ui.protocol.value)) {
				if (ui.protocolShow[i].classList.contains(elements.replaceCert)) {
					if (ui.protocolShow[i].classList.contains(elements.replaceCertOnly) == state.replaceCert)
						ui.protocolShow[i].style.display = "table-row";
					else
						ui.protocolShow[i].style.display = "none";
				} else {
					ui.protocolShow[i].style.display = "table-row";
				}
			} else {
				ui.protocolShow[i].style.display = "none";
			}
		}
	};

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