/*
 * 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.a = "a";
	elements.caa = "caa";
	elements.cname = "cname";
	elements.domainLabel = "domain-label";
	elements.domainTag = "domain-tag";
	elements.domainTagLink = "domain-tag-link";
	elements.email = "email";
	elements.expire = "expire";
	elements.lmcRow = "lmc-tr1";
	elements.lmcRowAlt = "lmc-tr2";
	elements.mx = "mx";
	elements.ns = "ns";
	elements.refresh = "refresh";
	elements.retry = "retry";
	elements.srv = "srv";
	elements.subdomain = "subdomain";
	elements.ttl = "ttl";
	elements.txt = "txt";

	// Data recieved from API calls
	var data = {};
	data.domain = {};
	data.records = [];

	// Static references to UI elements
	var ui = {};
	ui.a = {};
	ui.caa = {};
	ui.cname = {};
	ui.domainLabel = {};
	ui.domainTag = {};
	ui.domainTagLink = {};
	ui.email = {};
	ui.expire = {};
	ui.mx = {};
	ui.ns = {};
	ui.refresh = {};
	ui.retry = {};
	ui.srv = {};
	ui.subdomains = [];
	ui.ttl = {};
	ui.txt = {};

	// Creates an A record table row
	var createARow = function(record, alt)
	{
		var row = document.createElement("tr");
		if (alt)
			row.className = elements.lmcRowAlt;
		else
			row.className = elements.lmcRow;

		var hostname = document.createElement("td");
		hostname.innerHTML = record.name;
		row.appendChild(hostname);

		var ip = document.createElement("td");
		ip.innerHTML = record.target;
		row.appendChild(ip);

		var ttl = document.createElement("td");
		if (record.ttl_sec == 0)
			ttl.innerHTML = "Default";
		else
			ttl.innerHTML = record.ttl_sec;
		row.appendChild(ttl);

		row.appendChild(createOptions(record));

		return row;
	};

	// Creates a CAA record table row
	var createCAARow = function(record, alt)
	{
		var row = document.createElement("tr");
		if (alt)
			row.className = elements.lmcRowAlt;
		else
			row.className = elements.lmcRow;

		var name = document.createElement("td");
		name.innerHTML = record.name;
		row.appendChild(name);

		var tag = document.createElement("td");
		tag.innerHTML = record.tag;
		row.appendChild(tag);

		var value = document.createElement("td");
		value.innerHTML = record.target;
		row.appendChild(value);

		var ttl = document.createElement("td");
		if (record.ttl_sec == 0)
			ttl.innerHTML = "Default";
		else
			ttl.innerHTML = record.ttl_sec;
		row.appendChild(ttl);

		row.appendChild(createOptions(record));

		return row;
	};

	// Creates a CNAME record table row
	var createCNAMERow = function(record, alt)
	{
		var row = document.createElement("tr");
		if (alt)
			row.className = elements.lmcRowAlt;
		else
			row.className = elements.lmcRow;

		var hostname = document.createElement("td");
		hostname.innerHTML = record.name;
		row.appendChild(hostname);

		var alias = document.createElement("td");
		alias.innerHTML = record.target;
		row.appendChild(alias);

		var ttl = document.createElement("td");
		if (record.ttl_sec == 0)
			ttl.innerHTML = "Default";
		else
			ttl.innerHTML = record.ttl_sec;
		row.appendChild(ttl);

		row.appendChild(createOptions(record));

		return row;
	};

	// Creates an MX record table row
	var createMXRow = function(record, alt)
	{
		var row = document.createElement("tr");
		if (alt)
			row.className = elements.lmcRowAlt;
		else
			row.className = elements.lmcRow;

		var server = document.createElement("td");
		server.innerHTML = record.target;
		row.appendChild(server);

		var preference = document.createElement("td");
		preference.innerHTML = record.priority;
		row.appendChild(preference);

		var subdomain = document.createElement("td");
		subdomain.innerHTML = record.name;
		row.appendChild(subdomain);

		var ttl = document.createElement("td");
		if (record.ttl_sec == 0)
			ttl.innerHTML = "Default";
		else
			ttl.innerHTML = record.ttl_sec;
		row.appendChild(ttl);

		row.appendChild(createOptions(record));

		return row;
	};

	// Creates an NS record table row
	var createNSRow = function(record, alt)
	{
		var row = document.createElement("tr");
		if (alt)
			row.className = elements.lmcRowAlt;
		else
			row.className = elements.lmcRow;

		var nameserver = document.createElement("td");
		nameserver.innerHTML = record.target;
		row.appendChild(nameserver);

		var subdomain = document.createElement("td");
		subdomain.className = elements.subdomain;
		if (record.name)
			subdomain.innerHTML = record.name;
		else if (data.domain.domain)
			subdomain.innerHTML = data.domain.domain;
		row.appendChild(subdomain);

		var ttl = document.createElement("td");
		if (record.ttl_sec == 0)
			ttl.innerHTML = "Default";
		else
			ttl.innerHTML = record.ttl_sec;
		row.appendChild(ttl);

		row.appendChild(createOptions(record));

		return row;
	};

	// Creates the options section for a record
	var createOptions = function(record)
	{
		var options = document.createElement("td");
		var editLink = document.createElement("a");
		editLink.href = "/dns/resource?did=" + data.params.did + "&rid=" + record.id;
		editLink.innerHTML = "Edit";
		var separator = document.createElement("span");
		separator.innerHTML = " | ";
		var removeLink = document.createElement("a");
		removeLink.href = "/dns/resource_delete?did=" + data.params.did + "&rid=" + record.id;
		removeLink.innerHTML = "Remove";
		options.appendChild(editLink);
		options.appendChild(separator);
		options.appendChild(removeLink);

		return options;
	};

	// Creates an SRV record table row
	var createSRVRow = function(record, alt)
	{
		var row = document.createElement("tr");
		if (alt)
			row.className = elements.lmcRowAlt;
		else
			row.className = elements.lmcRow;

		var service = document.createElement("td");
		service.innerHTML = record.name;
		row.appendChild(service);

		var domain = document.createElement("td");
		domain.className = elements.subdomain;
		if (data.domain.domain)
			domain.innerHTML = data.domain.domain;
		row.appendChild(domain);

		var priority = document.createElement("td");
		priority.innerHTML = record.priority;
		row.appendChild(priority);

		var weight = document.createElement("td");
		weight.innerHTML = record.weight;
		row.appendChild(weight);

		var port = document.createElement("td");
		port.innerHTML = record.port;
		row.appendChild(port);

		var target = document.createElement("td");
		target.innerHTML = record.target;
		row.appendChild(target);

		var ttl = document.createElement("td");
		if (record.ttl_sec == 0)
			ttl.innerHTML = "Default";
		else
			ttl.innerHTML = record.ttl_sec;
		row.appendChild(ttl);

		row.appendChild(createOptions(record));

		return row;
	};

	// Creates a TXT record table row
	var createTXTRow = function(record, alt)
	{
		var row = document.createElement("tr");
		if (alt)
			row.className = elements.lmcRowAlt;
		else
			row.className = elements.lmcRow;

		var name = document.createElement("td");
		name.innerHTML = record.name;
		row.appendChild(name);

		var value = document.createElement("td");
		value.innerHTML = record.target;
		row.appendChild(value);

		var ttl = document.createElement("td");
		if (record.ttl_sec == 0)
			ttl.innerHTML = "Default";
		else
			ttl.innerHTML = record.ttl_sec;
		row.appendChild(ttl);

		row.appendChild(createOptions(record));

		return row;
	};

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

		// Redirect if this is a slave zone
		if (data.domain.type == "slave") {
			location.href = "/dns/domain_slave?did=" + data.domain.id;
			return;
		}

		// Set page title and header stuff
		document.title += " // " + data.domain.domain;
		ui.domainLabel.innerHTML = data.domain.domain;
		if (data.domain.tags.length == 1) {
			ui.domainTagLink.href = "/dns?tag=" + data.domain.tags[0];
			ui.domainTagLink.innerHTML = "(" + data.domain.tags[0] + ")";
			ui.domainTag.style.display = "inline";
		}

		// Set SOA info
		ui.email.innerHTML = data.domain.soa_email;
		if (data.domain.ttl_sec == 0)
			ui.ttl.innerHTML = "Default";
		else
			ui.ttl.innerHTML = data.domain.ttl_sec;
		if (data.domain.refresh_sec == 0)
			ui.refresh.innerHTML = "Default";
		else
			ui.refresh.innerHTML = data.domain.refresh_sec;
		if (data.domain.retry_sec == 0)
			ui.retry.innerHTML = "Default";
		else
			ui.retry.innerHTML = data.domain.retry_sec;
		if (data.domain.expire_sec == 0)
			ui.expire.innerHTML = "Default";
		else
			ui.expire.innerHTML = data.domain.expire_sec;

		// Set NS subdomain labels
		ui.subdomains = document.getElementsByClassName(elements.subdomain);
		for (var i = 0; i < ui.subdomains.length; i++)
			ui.subdomains[i].innerHTML = data.domain.domain;
	};

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

		// Request the next page if there are more pages
		if (response.page != response.pages) {
			apiGet("/domains/" + data.params.did + "/records?page=" + (response.page + 1), displayRecords, null);
			return;
		}

		// Sort records by type
		data.records.sort(function(a, b)
		{
			return a.type.localeCompare(b.type);
		});

		// Add records into record tables
		for (var i = 0; i < data.records.length; i++) {
			switch (data.records[i].type) {
			case "A":
			case "AAAA":
				ui.a.appendChild(createARow(data.records[i], ui.a.children.length % 2));
				break;
			case "CAA":
				ui.caa.appendChild(createCAARow(data.records[i], ui.caa.children.length % 2));
				break;
			case "CNAME":
				ui.cname.appendChild(createCNAMERow(data.records[i], ui.cname.children.length % 2));
				break;
			case "MX":
				ui.mx.appendChild(createMXRow(data.records[i], ui.mx.children.length % 2));
				break;
			case "NS":
				ui.ns.appendChild(createNSRow(data.records[i], ui.ns.children.length % 2));
				break;
			case "SRV":
				ui.srv.appendChild(createSRVRow(data.records[i], ui.srv.children.length % 2));
				break;
			case "TXT":
				ui.txt.appendChild(createTXTRow(data.records[i], ui.txt.children.length % 2));
				break;
			default:
				console.log(data.records[i]);
				break;
			}
		}
	};

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

		// We need a domain ID, so die if we don't have it
		if (!data.params.did) {
			alert("No domain 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("did=0", "did=" + data.params.did);

		// Get element references
		ui.a = document.getElementById(elements.a);
		ui.caa = document.getElementById(elements.caa);
		ui.cname = document.getElementById(elements.cname);
		ui.domainLabel = document.getElementById(elements.domainLabel);
		ui.domainTag = document.getElementById(elements.domainTag);
		ui.domainTagLink = document.getElementById(elements.domainTagLink);
		ui.email = document.getElementById(elements.email);
		ui.expire = document.getElementById(elements.expire);
		ui.mx = document.getElementById(elements.mx);
		ui.ns = document.getElementById(elements.ns);
		ui.refresh = document.getElementById(elements.refresh);
		ui.retry = document.getElementById(elements.retry);
		ui.srv = document.getElementById(elements.srv);
		ui.ttl = document.getElementById(elements.ttl);
		ui.txt = document.getElementById(elements.txt);

		// Get data from API
		apiGet("/domains/" + data.params.did, displayDetails, null);
		apiGet("/domains/" + data.params.did + "/records", displayRecords, null);
	};

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