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

(function()
{
	// Element names specific to this page
	elements.cpu = "cpu";
	elements.cpuCurrent = "cpu-current";
	elements.cpuNew = "cpu-new";
	elements.diskName = "disk-name";
	elements.eta = "eta";
	elements.gpu = "gpu";
	elements.gpuCurrent = "gpu-current";
	elements.gpuNew = "gpu-new";
	elements.linodeLabel = "linode-label";
	elements.linodeTag = "linode-tag";
	elements.linodeTagLink = "linode-tag-link";
	elements.mbit = "mbit";
	elements.mbitCurrent = "mbit-current";
	elements.mbitNew = "mbit-new";
	elements.ram = "ram";
	elements.ramCurrent = "ram-current";
	elements.ramNew = "ram-new";
	elements.resize = "resize";
	elements.resizeBox = "resize-box";
	elements.storage = "storage";
	elements.storageCurrent = "storage-current";
	elements.storageNew = "storage-new";
	elements.upgradeButton = "upgrade-button";
	elements.xfer = "xfer";
	elements.xferCurrent = "xfer-current";
	elements.xferNew = "xfer-new";

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

	// Static references to UI elements
	var ui = {};
	ui.cpu = {};
	ui.cpuCurrent = {};
	ui.cpuNew = {};
	ui.diskName = {};
	ui.eta = {};
	ui.gpu = {};
	ui.gpuCurrent = {};
	ui.gpuNew = {};
	ui.linodeLabel = {};
	ui.linodeTag = {};
	ui.linodeTagLink = {};
	ui.mbit = {};
	ui.mbitCurrent = {};
	ui.mbitNew = {};
	ui.ram = {};
	ui.ramCurrent = {};
	ui.ramNew = {};
	ui.resize = {};
	ui.resizeBox = {};
	ui.storage = {};
	ui.storageCurrent = {};
	ui.storageNew = {};
	ui.upgradeButton = {};
	ui.xfer = {};
	ui.xferCurrent = {};
	ui.xferNew = {};

	// 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 plan info
		apiGet("/linode/types/" + data.linode.type, displayPlan, null);
	};

	// Callback for linode 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;
		}

		// Compute total size and types of disks
		var size = 0;
		var numExt = 0;
		var numSwap = 0;
		for (var i = 0; i < data.disks.length; i++) {
			size += data.disks[i].size;
			if (data.disks[i].filesystem.match(/ext3|ext4/)) {
				numExt++;
				ui.diskName.innerHTML = data.disks[i].label;
			}
			else if (data.disks[i].filesystem == "swap")
				numSwap++;
		}

		// Compute estimated resize time
		ui.eta.innerHTML = migrateETA(size, true);

		// Show auto-resize option if there is only a single ext disk
		if ((data.disks.length == 1 && numExt == 1) || (data.disks.length == 2 && numExt == 1 && numSwap == 1)) {
			ui.resizeBox.disabled = false;
			ui.resizeBox.checked = true;
			ui.resize.style.display = "initial";
		}
	};

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

		// Redirect to dashboard if there is no upgrade
		if (!data.plan.successor) {
			location.href = "/linodes/dashboard?lid=" + data.params.lid;
			return;
		}

		// Get successor
		apiGet("/linode/types/" + data.plan.successor, displaySuccessor, null);
	};

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

		// Set UI stuff
		if (data.plan.memory != data.successor.memory) {
			ui.ramCurrent.innerHTML = data.plan.memory / 1024;
			ui.ramNew.innerHTML = data.successor.memory / 1024;
			ui.ram.style.display = "list-item";
		}
		if (data.plan.disk != data.successor.disk) {
			ui.storageCurrent.innerHTML = data.plan.disk / 1024;
			ui.storageNew.innerHTML = data.successor.disk / 1024;
			ui.storage.style.display = "list-item";
		}
		if (data.plan.vcpus != data.successor.vcpus) {
			ui.cpuCurrent.innerHTML = data.plan.vcpus;
			ui.cpuNew.innerHTML = data.successor.vcpus;
			ui.cpu.style.display = "list-item";
		}
		if (data.plan.gpus != data.successor.gpus) {
			ui.gpuCurrent.innerHTML = data.plan.gpus;
			ui.gpuNew.innerHTML = data.successor.gpus;
			ui.gpu.style.display = "list-item";
		}
		if (data.plan.network_out != data.successor.network_out) {
			ui.mbitCurrent.innerHTML = data.plan.network_out;
			ui.mbitNew.innerHTML = data.successor.network_out;
			ui.mbit.style.display = "list-item";
		}
		if (data.plan.transfer != data.successor.transfer) {
			ui.xferCurrent.innerHTML = data.plan.transfer;
			ui.xferNew.innerHTML = data.successor.transfer;
			ui.xfer.style.display = "list-item";
		}

		ui.upgradeButton.disabled = false;
	};

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

		var req = {
			"allow_auto_disk_resize": (!ui.resizeBox.disabled && ui.resizeBox.checked)
		};

		apiPost("/linode/instances/" + data.params.lid + "/mutate", 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);

		// Get element references
		ui.cpu = document.getElementById(elements.cpu);
		ui.cpuCurrent = document.getElementById(elements.cpuCurrent);
		ui.cpuNew = document.getElementById(elements.cpuNew);
		ui.diskName = document.getElementById(elements.diskName);
		ui.eta = document.getElementById(elements.eta);
		ui.gpu = document.getElementById(elements.gpu);
		ui.gpuCurrent = document.getElementById(elements.gpuCurrent);
		ui.gpuNew = document.getElementById(elements.gpuNew);
		ui.linodeLabel = document.getElementById(elements.linodeLabel);
		ui.linodeTag = document.getElementById(elements.linodeTag);
		ui.linodeTagLink = document.getElementById(elements.linodeTagLink);
		ui.mbit = document.getElementById(elements.mbit);
		ui.mbitCurrent = document.getElementById(elements.mbitCurrent);
		ui.mbitNew = document.getElementById(elements.mbitNew);
		ui.ram = document.getElementById(elements.ram);
		ui.ramCurrent = document.getElementById(elements.ramCurrent);
		ui.ramNew = document.getElementById(elements.ramNew);
		ui.resize = document.getElementById(elements.resize);
		ui.resizeBox = document.getElementById(elements.resizeBox);
		ui.storage = document.getElementById(elements.storage);
		ui.storageCurrent = document.getElementById(elements.storageCurrent);
		ui.storageNew = document.getElementById(elements.storageNew);
		ui.upgradeButton = document.getElementById(elements.upgradeButton);
		ui.xfer = document.getElementById(elements.xfer);
		ui.xferCurrent = document.getElementById(elements.xferCurrent);
		ui.xferNew = document.getElementById(elements.xferNew);

		// Attach event handlers
		ui.upgradeButton.addEventListener("click", handleUpgrade);

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

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