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

(function()
{
	// Element names specific to this page
	elements.currentDistros = "current";
	elements.customImages = "custom";
	elements.deletedDisks = "deleted";
	elements.deployButton = "deploy-button";
	elements.deprecatedDistros = "deprecated";
	elements.image = "image";
	elements.linodeLabel = "linode-label";
	elements.linodeTag = "linode-tag";
	elements.linodeTagLink = "linode-tag-link";
	elements.maxSize = "max";
	elements.minSize = "min";
	elements.rootPass = "root-pass";
	elements.size = "size";
	elements.subnav = "subnav-link";
	elements.subnavActive = "subnav-link-active";

	// Data recieved from API calls
	var data = {};
	data.disks = [];
	data.images = [];
	data.linode = {};

	// Static references to UI elements
	var ui = {};
	ui.currentDistros = {};
	ui.customImages = {};
	ui.deletedDisks = {};
	ui.deployButton = {};
	ui.deprecatedDistros = {};
	ui.image = {};
	ui.linodeLabel = {};
	ui.linodeTag = {};
	ui.linodeTagLink = {};
	ui.rootPass = {};
	ui.maxSize = {};
	ui.minSize = {};
	ui.size = {};

	// 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";
		}

		// Get linode's disks
		apiGet("/linode/instances/" + data.params.lid + "/disks", displayDisks, null);
	};

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

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

		// Display max size
		var free = data.linode.specs.disk;
		for (var i = 0; i < data.disks.length; i++)
			free -= data.disks[i].size;

		ui.maxSize.innerHTML = free;
		ui.size.max = free;
		ui.size.value = free;
	};

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

		// Request the next page if there are more pages
		if (response.page != response.pages) {
			apiGet("/images?page=" + (response.page + 1), displayImages, null);
			return;
		}

		// Add images to selector
		for (var i = 0; i < data.images.length; i++) {
			// Don't display kubernetes distro variants
			if (data.images[i].id.indexOf("-kube-") != -1)
				continue;
			var image = document.createElement("option");
			image.value = data.images[i].id;
			image.innerHTML = data.images[i].label;
			if (data.images[i].deprecated)
				ui.deprecatedDistros.appendChild(image);
			else if (data.images[i].type == "automatic")
				ui.deletedDisks.appendChild(image);
			else if (!data.images[i].vendor)
				ui.customImages.appendChild(image);
			else
				ui.currentDistros.appendChild(image);

			if (data.images[i].id == settings.preferredDistro) {
				ui.image.value = data.images[i].id;
				ui.minSize.innerHTML = data.images[i].size;
				ui.size.min = data.images[i].size;
			}
		}

		if (ui.customImages.childNodes.length == 0)
			ui.customImages.style.display = "none";
		if (ui.deletedDisks.childNodes.length == 0)
			ui.deletedDisks.style.display = "none";
		ui.deployButton.disabled = false;
	};

	// Handler for deploy button
	var handleDeploy = function(event)
	{
		if (event.currentTarget.disabled)
			return;

		var image = null;
		for (var i = 0; i < data.images.length; i++) {
			if (data.images[i].id == ui.image.value) {
				image = data.images[i];
				break;
			}
		}

		if (!image)
			return;

		var req = {
			"label": image.label,
			"size": parseInt(ui.size.value),
			"image": ui.image.value,
			"root_pass": ui.rootPass.value
		};
		if (image.id.startsWith("linode/"))
			req.label += " Disk";

		apiPost("/linode/instances/" + data.params.lid + "/disks", req, function(response)
		{
			location.href = "/linodes/dashboard?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 dashboard subnav link
		var subnavLinks = document.getElementsByClassName(elements.subnav);
		for (var i = 0; i < subnavLinks.length; i++) {
			if (subnavLinks[i].pathname == "/linodes/dashboard")
				subnavLinks[i].className += " " + elements.subnavActive;
		}

		// Get element references
		ui.currentDistros = document.getElementById(elements.currentDistros);
		ui.customImages = document.getElementById(elements.customImages);
		ui.deletedDisks = document.getElementById(elements.deletedDisks);
		ui.deployButton = document.getElementById(elements.deployButton);
		ui.deprecatedDistros = document.getElementById(elements.deprecatedDistros);
		ui.image = document.getElementById(elements.image);
		ui.linodeLabel = document.getElementById(elements.linodeLabel);
		ui.linodeTag = document.getElementById(elements.linodeTag);
		ui.linodeTagLink = document.getElementById(elements.linodeTagLink);
		ui.maxSize = document.getElementById(elements.maxSize);
		ui.minSize = document.getElementById(elements.minSize);
		ui.rootPass = document.getElementById(elements.rootPass);
		ui.size = document.getElementById(elements.size);

		// Register event handlers
		ui.deployButton.addEventListener("click", handleDeploy);
		ui.image.addEventListener("input", updateMinSize);

		// Get data from API
		apiGet("/linode/instances/" + data.params.lid, displayDetails, null);
		apiGet("/images", displayImages, null);
	};

	// Update the mininum image size display
	var updateMinSize = function()
	{
		var image = null;
		for (var i = 0; i < data.images.length; i++) {
			if (data.images[i].id == ui.image.value) {
				image = data.images[i];
				break;
			}
		}

		if (!image)
			return;

		ui.minSize.innerHTML = image.size;
		ui.size.min = image.size;
	};

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