/*
 * 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.a = "a";
	elements.aHostname = "a-hostname";
	elements.aIP = "a-ip";
	elements.caa = "caa";
	elements.caaSubdomain = "caa-subdomain";
	elements.caaTag = "caa-tag";
	elements.caaValue = "caa-value";
	elements.cname = "cname";
	elements.cnameHostname = "cname-hostname";
	elements.cnameAlias = "cname-alias";
	elements.domainLabel = "domain-label";
	elements.domainTag = "domain-tag";
	elements.domainTagLink = "domain-tag-link";
	elements.mx = "mx";
	elements.mxServer = "mx-server";
	elements.mxPriority = "mx-priority";
	elements.mxSubdomain = "mx-subdomain";
	elements.ns = "ns";
	elements.nsNameserver = "ns-nameserver";
	elements.nsSubdomain = "ns-subdomain";
	elements.saveButton = "save-button";
	elements.srv = "srv";
	elements.srvService = "srv-service";
	elements.srvProtocol = "srv-protocol";
	elements.srvTarget = "srv-target";
	elements.srvPriority = "srv-priority";
	elements.srvWeight = "srv-weight";
	elements.srvPort = "srv-port";
	elements.ttl = "ttl";
	elements.txt = "txt";
	elements.txtName = "txt-name";
	elements.txtValue = "txt-value";

	// Data recieved from API calls
	var data = {};
	data.domain = {};
	data.record = {};

	// Static references to UI elements
	var ui = {};
	ui.a = [];
	ui.aaaa = [];
	ui.aHostname = {};
	ui.aIP = {};
	ui.caa = [];
	ui.caaSubdomain = {};
	ui.caaTag = {};
	ui.caaValue = {};
	ui.cname = [];
	ui.cnameHostname = {};
	ui.cnameAlias = {};
	ui.domainLabel = {};
	ui.domainTag = {};
	ui.domainTagLink = {};
	ui.mx = [];
	ui.mxServer = {};
	ui.mxPriority = {};
	ui.mxSubdomain = {};
	ui.ns = [];
	ui.nsNameserver = {};
	ui.nsSubdomain = {};
	ui.saveButton = {};
	ui.srv = [];
	ui.srvService = {};
	ui.srvProtocol = {};
	ui.srvTarget = {};
	ui.srvPriority = {};
	ui.srvWeight = {};
	ui.srvPort = {};
	ui.ttl = {};
	ui.txt = [];
	ui.txtName = {};
	ui.txtValue = {};

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

		// 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";
		}
	};

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

		// Display controls for record type
		data.record.type = data.record.type.toLowerCase();
		for (var i = 0; i < ui[data.record.type].length; i++)
			ui[data.record.type][i].style.display = "table-row-group";

		// Fill in form data
		switch (data.record.type) {
		case "a":
		case "aaaa":
			ui.aHostname.value = data.record.name;
			ui.aIP.value = data.record.target;
			break;
		case "caa":
			ui.caaSubdomain.value = data.record.name;
			ui.caaTag.value = data.record.tag;
			ui.caaValue.value = data.record.target;
			break;
		case "cname":
			ui.cnameHostname.value = data.record.name;
			ui.cnameAlias.value = data.record.target;
			break;
		case "mx":
			ui.mxServer.value = data.record.target;
			ui.mxPriority.value = data.record.priority;
			ui.mxSubdomain.value = data.record.name;
			break;
		case "ns":
			ui.nsNameserver.value = data.record.target;
			ui.nsSubdomain.value = data.record.name;
			break;
		case "srv":
			if (data.record.service.charAt(0) == "_")
				ui.srvService.value = data.record.service;
			else
				ui.srvService.value = "_" + data.record.service;
			ui.srvProtocol.value = data.record.protocol;
			ui.srvTarget.value = data.record.target;
			ui.srvPriority.value = data.record.priority;
			ui.srvWeight.value = data.record.weight;
			ui.srvPort.value = data.record.port;
			break;
		case "txt":
			ui.txtName.value = data.record.name;
			ui.txtValue.value = data.record.target;
			break;
		}

		ui.ttl.value = data.record.ttl_sec;
		ui.saveButton.disabled = false;
	};

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

		var type;
		if (data.record.type)
			type = data.record.type;
		else
			type = data.params.type;

		var req = {
			"ttl_sec": parseInt(ui.ttl.value),
			"type": type.toUpperCase()
		};

		switch (type) {
		case "a":
		case "aaaa":
			req.name = ui.aHostname.value;
			req.target = ui.aIP.value;
			break;
		case "caa":
			req.name = ui.caaSubdomain.value;
			req.tag = ui.caaTag.value;
			req.target = ui.caaValue.value;
			break;
		case "cname":
			req.name = ui.cnameHostname.value;
			req.target = ui.cnameAlias.value;
			break;
		case "mx":
			req.target = ui.mxServer.value;
			req.priority = parseInt(ui.mxPriority.value);
			req.name = ui.mxSubdomain.value;
			break;
		case "ns":
			req.target = ui.nsNameserver.value;
			req.name = ui.nsSubdomain.value;
			break;
		case "srv":
			req.service = ui.srvService.value;
			req.protocol = ui.srvProtocol.value;
			req.target = ui.srvTarget.value;
			req.priority = parseInt(ui.srvPriority.value);
			req.weight = parseInt(ui.srvWeight.value);
			req.port = parseInt(ui.srvPort.value);
			break;
		case "txt":
			req.name = ui.txtName.value;
			req.target = ui.txtValue.value;
			break;
		}

		var callback = function(response)
		{
			location.href = "/dns/domain?did=" + data.params.did;
		};
		if (data.params.rid == "0")
			apiPost("/domains/" + data.params.did + "/records", req, callback);
		else
			apiPut("/domains/" + data.params.did + "/records/" + data.params.rid, req, callback);
	};

	// 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;
		}

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

		// If this is a new resource, we also need a resource type
		if (data.params.rid == "0" && !data.params.type) {
			alert("No resource type 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.getElementsByClassName(elements.a);
		ui.aaaa = ui.a;
		ui.aHostname = document.getElementById(elements.aHostname);
		ui.aIP = document.getElementById(elements.aIP);
		ui.caa = document.getElementsByClassName(elements.caa);
		ui.caaSubdomain = document.getElementById(elements.caaSubdomain);
		ui.caaTag = document.getElementById(elements.caaTag);
		ui.caaValue = document.getElementById(elements.caaValue);
		ui.cname = document.getElementsByClassName(elements.cname);
		ui.cnameHostname = document.getElementById(elements.cnameHostname);
		ui.cnameAlias = document.getElementById(elements.cnameAlias);
		ui.domainLabel = document.getElementById(elements.domainLabel);
		ui.domainTag = document.getElementById(elements.domainTag);
		ui.domainTagLink = document.getElementById(elements.domainTagLink);
		ui.mx = document.getElementsByClassName(elements.mx);
		ui.mxServer = document.getElementById(elements.mxServer);
		ui.mxPriority = document.getElementById(elements.mxPriority);
		ui.mxSubdomain = document.getElementById(elements.mxSubdomain);
		ui.ns = document.getElementsByClassName(elements.ns);
		ui.nsNameserver = document.getElementById(elements.nsNameserver);
		ui.nsSubdomain = document.getElementById(elements.nsSubdomain);
		ui.saveButton = document.getElementById(elements.saveButton);
		ui.srv = document.getElementsByClassName(elements.srv);
		ui.srvService = document.getElementById(elements.srvService);
		ui.srvProtocol = document.getElementById(elements.srvProtocol);
		ui.srvTarget = document.getElementById(elements.srvTarget);
		ui.srvPriority = document.getElementById(elements.srvPriority);
		ui.srvWeight = document.getElementById(elements.srvWeight);
		ui.srvPort = document.getElementById(elements.srvPort);
		ui.ttl = document.getElementById(elements.ttl);
		ui.txt = document.getElementsByClassName(elements.txt);
		ui.txtName = document.getElementById(elements.txtName);
		ui.txtValue = document.getElementById(elements.txtValue);

		// Display controls for given type
		if (data.params.rid == "0") {
			for (var i = 0; i < ui[data.params.type].length; i++)
				ui[data.params.type][i].style.display = "table-row-group";
			ui.saveButton.disabled = false;
		}

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

		// Get data from API
		apiGet("/domains/" + data.params.did, displayDetails, null);
		if (data.params.rid != "0")
			apiGet("/domains/" + data.params.did + "/records/" + data.params.rid, displayRecord, null);
	};

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