/*
 * 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.centerCell = "center-cell";
	elements.domains = "domains";
	elements.domainTagPrefix = "domain-tag-";
	elements.lmcRow = "lmc-tr1";
	elements.lmcRowAlt = "lmc-tr2";
	elements.lmcTable = "lmc-table";
	elements.loading = "loading";
	elements.sublinks = "sub-links";

	// Data recieved from API calls
	var data = {};
	data.domains = [];
	data.domainTags = [];
	data.noTag = false;

	// Static references to UI elements
	var ui = {};
	ui.domains = {};
	ui.domainTables = {};
	ui.loading = {};

	var createDomainRow = function(domain, alt)
	{
		var row = document.createElement("tr");
		if (alt)
			row.className = elements.lmcRowAlt;
		else
			row.className = elements.lmcRow;

		var name = document.createElement("td");
		var nameLink = document.createElement("a");
		nameLink.href = "/dns/domain?did=" + domain.id;
		nameLink.innerHTML = domain.domain;
		name.appendChild(nameLink);
		row.appendChild(name);

		var type = document.createElement("td");
		type.innerHTML = domain.type;
		row.appendChild(type);

		var email = document.createElement("td");
		email.innerHTML = domain.soa_email;
		row.appendChild(email);

		var status = document.createElement("td");
		status.innerHTML = domain.status.charAt(0).toUpperCase() + domain.status.slice(1).replace(/_/g, " ");
		row.appendChild(status);

		var options = document.createElement("td");
		options.className = elements.centerCell;
		var editLink = document.createElement("a");
		editLink.href = "/dns/domain?did=" + domain.id;
		editLink.innerHTML = "Edit";
		var separator = document.createElement("span");
		separator.innerHTML = " | ";
		var removeLink = document.createElement("a");
		removeLink.href = "/dns/domain_delete?did=" + domain.id;
		removeLink.innerHTML = "Remove";
		options.appendChild(editLink);
		options.appendChild(separator);
		options.appendChild(removeLink);
		row.appendChild(options);

		return row;
	};

	var createDomainTable = function(tag)
	{
		var table = document.createElement("table");
		table.id = elements.domainTagPrefix + tag;
		table.className = elements.lmcTable;

		var thead = document.createElement("thead");
		var headRow1 = document.createElement("tr");
		var title = document.createElement("td");
		if (!tag.length)
			title.innerHTML = "Domains";
		else
			title.innerHTML = tag;
		headRow1.appendChild(title);
		var headRow2 = document.createElement("tr");
		var cells = ["Domain Zone", "Type", "SOA Email", "Status", "Options"];
		title.colspan = cells.length;
		for (var i = 0; i < cells.length; i++) {
			var cell = document.createElement("td");
			if (cells[i] == "Options")
				cell.className = elements.centerCell;
			cell.innerHTML = cells[i];
			headRow2.appendChild(cell);
		}
		thead.appendChild(headRow1);
		thead.appendChild(headRow2);

		var tbody = document.createElement("tbody");
		table.appendChild(thead);
		table.appendChild(tbody);
		ui.domainTables[tag] = tbody;

		var sublinks = document.createElement("p");
		sublinks.className = elements.sublinks;
		var importZone = document.createElement("a");
		importZone.href = "/dns/domain_import";
		importZone.innerHTML = "Import a zone";
		var separator = document.createElement("span");
		separator.innerHTML = " | ";
		var clone = document.createElement("a");
		clone.href = "/dns/domain_clone";
		clone.innerHTML = "Clone an existing zone";
		var add = document.createElement("a");
		add.href = "/dns/domain_add";
		add.innerHTML = "Add a domain zone";
		sublinks.appendChild(importZone);
		sublinks.appendChild(separator);
		sublinks.appendChild(clone);
		sublinks.appendChild(separator.cloneNode(true));
		sublinks.appendChild(add);

		ui.domains.appendChild(table);
		ui.domains.appendChild(sublinks);
	};

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

		// Add new tags to array
		for (var i = 0; i < response.data.length; i++) {
			if (!response.data[i].tags.length)
				data.noTag = true;

			for (var j = 0; j < response.data[i].tags.length; j++) {
				if (!data.domainTags.includes(response.data[i].tags[j]))
					data.domainTags.push(response.data[i].tags[j]);
			}
		}

		// Request the next page if there are more pages
		if (response.page != response.pages) {
			var progress = (response.page / response.pages) * 100;
			progress = progress.toFixed(0);
			ui.loading.innerHTML = "Loading " + progress + "%...";
			var filters = null;
			if (data.params.tag)
				filters = { "tags": data.params.tag };
			apiGet("/domains?page=" + (response.page + 1), displayDomains, filters);
			return;
		}

		// Remove tag filter if there are no domains with given tag
		if (!data.domains.length && data.params.tag)
			location.href = "/dns";

		// Redirect to add page if there are no domains
		if (!data.domains.length && !data.params.tag)
			location.href = "/dns/domain_add";

		// Sort
		data.domainTags.sort();
		data.domains.sort(function(a, b)
		{
			return a.domain.toLowerCase().localeCompare(b.domain.toLowerCase());
		});

		// Create tables
		ui.loading.remove();
		if (data.noTag)
			createDomainTable("");
		for (var i = 0; i < data.domainTags.length; i++)
			createDomainTable(data.domainTags[i]);

		// Insert domains
		for (var i = 0; i < data.domains.length; i++) {
			if (!data.domains[i].tags.length)
				ui.domainTables[""].appendChild(createDomainRow(data.domains[i], ui.domainTables[""].children.length % 2));

			for (var j = 0; j < data.domains[i].tags.length; j++)
				ui.domainTables[data.domains[i].tags[j]].appendChild(createDomainRow(data.domains[i], ui.domainTables[data.domains[i].tags[j]].children.length % 2));
		}
	};

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

		setupHeader();

		// Get element references
		ui.domains = document.getElementById(elements.domains);
		ui.loading = document.getElementById(elements.loading);

		// Get linode and transfer info
		var filters = null;
		if (data.params.tag)
			filters = { "tags": data.params.tag };
		apiGet("/domains", displayDomains, filters);
	};

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