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

(function()
{
	// Element names specific to this page
	elements.cloneButton = "clone-button";
	elements.configCloneTable = "config-clone-table";
	elements.configDiskRow = "config-disk-row";
	elements.configsNone = "configs-none";
	elements.configTable = "config-table-body";
	elements.dcOther = "dc-other";
	elements.destBackups = "dest-backups";
	elements.destBackupsPrice = "dest-backups-price";
	elements.destLabel = "dest-label";
	elements.destLinode = "dest-linode";
	elements.destLocation = "dest-location";
	elements.destPlan = "dest-plan";
	elements.destPlanPrice = "dest-plan-price";
	elements.diskCloneTable = "disk-clone-table";
	elements.disksNone = "disks-none";
	elements.diskTable = "disk-table-body";
	elements.etaLocal = "eta-local";
	elements.etaRemote = "eta-remote";
	elements.etaRow = "eta-row";
	elements.linodeLabel = "linode-label";
	elements.linodeTag = "linode-tag";
	elements.linodeTagLink = "linode-tag-link";
	elements.lmcRow = "lmc-tr1";
	elements.lmcRowAlt = "lmc-tr2";
	elements.lmcRowThree = "lmc-tr3";
	elements.loadingConfigs = "loading-configs";
	elements.loadingDisks = "loading-disks";
	elements.newLinode = "new-linode";
	elements.sourceLocation = "source-location";

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

	// Static references to UI elements
	var ui = {};
	ui.cloneButton = {};
	ui.configCloneTable = {};
	ui.configsNone = {};
	ui.configTable = {};
	ui.dcOther = {};
	ui.destBackups = {};
	ui.destBackupsPrice = {};
	ui.destLabel = {};
	ui.destLinode = {};
	ui.destLocation = {};
	ui.destPlan = {};
	ui.destPlanPrice = {};
	ui.diskCloneTable = {};
	ui.disksNone = {};
	ui.diskTable = {};
	ui.etaLocal = {};
	ui.etaRemote = {};
	ui.etaRow = {};
	ui.linodeLabel = {};
	ui.linodeTag = {};
	ui.linodeTagLink = {};
	ui.loadingConfigs = {};
	ui.loadingDisks = {};
	ui.newLinode = [];
	ui.sourceLocation = {};

	// Temporary state
	var state = {};
	state.configs = [];
	state.disks = [];

	// Generate a config profile table row for clone section
	var createCloneConfigRow = function(config)
	{
		var row = document.createElement("tr");
		row.className = elements.lmcRowThree + " " + elements.configDiskRow;
		var label = document.createElement("td");
		label.colSpan = ui.configsNone.children[0].colSpan;
		label.innerHTML = config.label;
		row.appendChild(label);
		return row;
	};

	// Create a disk table row for clone section
	var createCloneDiskRow = function(disk)
	{
		var row = document.createElement("tr");
		row.className = elements.lmcRowThree + " " + elements.configDiskRow;

		// Label
		var label = document.createElement("td");
		label.innerHTML = disk.label;
		row.appendChild(label);

		// Size
		var size = document.createElement("td");
		size.innerHTML = disk.size + " MB";
		row.appendChild(size);

		// Local copy ETA
		var local = document.createElement("td");
		local.innerHTML = migrateETA(disk.size, true);
		row.appendChild(local);

		// Remote copy ETA
		var remote = document.createElement("td");
		remote.innerHTML = migrateETA(disk.size, false);
		row.appendChild(remote);

		return row;
	};

	// Generate a config profile table row
	var createConfigRow = function(config, alt)
	{
		var row = document.createElement("tr");
		if (alt)
			row.className = elements.lmcRowAlt;
		else
			row.className = elements.lmcRow;

		// Select checkbox
		var selectCell = document.createElement("td");
		var select = document.createElement("input");
		select.id = "config-" + config.id;
		select.type = "checkbox";
		select.addEventListener("input", handleSelect);
		selectCell.appendChild(select);
		row.appendChild(selectCell);

		// Config profile name
		var nameCell = document.createElement("td");
		nameCell.innerHTML = config.label;
		row.appendChild(nameCell);

		// Kernel
		var kernel = document.createElement("td");
		translateKernel(config.kernel, kernel);
		row.appendChild(kernel);

		// Number of disks
		var disks = document.createElement("td");
		var numDisks = 0;
		for (var disk in config.devices) {
			if (config.devices[disk] && config.devices[disk].disk_id)
				numDisks++;
		}
		disks.innerHTML = numDisks;
		row.appendChild(disks);

		return row;
	};

	// Generate a disk table row
	var createDiskRow = function(disk, alt)
	{
		var row = document.createElement("tr");
		if (alt)
			row.className = elements.lmcRowAlt;
		else
			row.className = elements.lmcRow;

		// Select checkbox
		var selectCell = document.createElement("td");
		var select = document.createElement("input");
		select.id = "disk-" + disk.id;
		select.type = "checkbox";
		select.addEventListener("input", handleSelect);
		selectCell.appendChild(select);
		row.appendChild(selectCell);

		// Disk name
		var nameCell = document.createElement("td");
		nameCell.innerHTML = disk.label;
		row.appendChild(nameCell);

		// Disk type
		var typeCell = document.createElement("td");
		typeCell.innerHTML = disk.filesystem;
		row.appendChild(typeCell);

		// Disk size
		var sizeCell = document.createElement("td");
		sizeCell.innerHTML = disk.size + " MB";
		row.appendChild(sizeCell);

		return row;
	};

	// Callback for config profiles API call
	var displayConfigs = function(response)
	{
		// Add configs to array
		data.configs = data.configs.concat(response.data);

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

		// Remove loading row
		ui.loadingConfigs.remove();

		// Insert config profile rows into table
		for (var i = 0; i < data.configs.length; i++)
			ui.configTable.appendChild(createConfigRow(data.configs[i], i % 2));
	};

	// 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";
		}

		// Display the source location
		var region = null;
		for (var i = 0; i < data.regions.length; i++) {
			if (data.regions[i].id == data.linode.region) {
				region = data.regions[i];
				break;
			}
		}

		if (region && region.label && region.label.length)
			ui.sourceLocation.innerHTML = region.label;
		else if (regionNames[data.linode.region])
			ui.sourceLocation.innerHTML = regionNames[data.linode.region];
		else
			ui.sourceLocation.innerHTML = data.linode.region;
	};

	// 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;
		}

		// Remove loading row
		ui.loadingDisks.remove();

		// Insert disk rows into table
		for (var i = 0; i < data.disks.length; i++)
			ui.diskTable.appendChild(createDiskRow(data.disks[i], i % 2));
	};

	// Callback for linodes API call
	var displayLinodes = function(response)
	{
		// Add linodes to selector
		for (var i = 0; i < response.data.length; i++) {
			if (response.data[i].id == data.params.lid)
				continue;
			var linode = document.createElement("option");
			linode.value = response.data[i].id;
			linode.innerHTML = response.data[i].label;
			var optgroup = document.getElementById(response.data[i].region);
			optgroup.appendChild(linode);
			optgroup.style.display = "initial";
		}

		// Request the next page if there are more pages
		if (response.page != response.pages)
			apiGet("/linode/instances?page=" + (response.page + 1), displayLinodes, null);
	};

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

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

		for (var i = 0; i < data.regions.length; i++) {
			// Add regions to selector
			var dc = document.createElement("option");
			dc.value = data.regions[i].id;
			if (data.regions[i].label && data.regions[i].label.length)
				dc.innerHTML = data.regions[i].label;
			else if (regionNames[data.regions[i].id])
				dc.innerHTML = regionNames[data.regions[i].id];
			else
				dc.innerHTML = data.regions[i].id;
			var group = null;
			if (countryContinents[data.regions[i].country])
				group = document.getElementById(countryContinents[data.regions[i].country]);
			if (!group)
				group = ui.dcOther;
			group.style.display = "initial";
			group.appendChild(dc);

			// Add optgroups to linode selector
			var optgroup = document.createElement("optgroup");
			optgroup.id = data.regions[i].id;
			if (data.regions[i].label && data.regions[i].label.length)
				optgroup.label = data.regions[i].label;
			else if (regionNames[data.regions[i].id])
				optgroup.label = regionNames[data.regions[i].id];
			else
				optgroup.label = data.regions[i].label;
			ui.destLinode.appendChild(optgroup);
		}

		apiGet("/linode/instances/" + data.params.lid, displayDetails, null);
		apiGet("/linode/instances", displayLinodes, null);
	};

	// Callback for linode types API call
	var displayTypes = function(response)
	{
		// Add types to array
		data.types = data.types.concat(response.data);

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

		// Insert types into selector
		for (var i = 0; i < data.types.length; i++) {
			var type = document.createElement("option");
			type.value = data.types[i].id;
			type.innerHTML = data.types[i].label;
			ui.destPlan.appendChild(type);
		}

		updatePrices(null);
	};

	// Clone button handler
	var handleClone = function(event)
	{
		if (event.currentTarget.disabled)
			return;

		var req = {
			"configs": state.configs,
			"disks": state.disks
		};

		var destLinode = parseInt(ui.destLinode.value);
		if (destLinode == 0) {
			req.region = ui.destLocation.value;
			req.type = ui.destPlan.value;
			if (ui.destLabel.value.length)
				req.label = ui.destLabel.value;
			req.backups_enabled = ui.destBackups.checked;
		} else {
			req.linode_id = destLinode;
		}

		apiPost("/linode/instances/" + data.params.lid + "/clone", req, function(response)
		{
			location.href = "/linodes/dashboard?lid=" + data.params.lid;
		});
	};

	// Handler for checkbox selections
	var handleSelect = function(event)
	{
		// Determine whether we're working with configs or disks
		var arr = state.configs;
		if (event.currentTarget.id.split("-")[0] == "disk")
			arr = state.disks;

		// Get the ID of the thing
		var id = parseInt(event.currentTarget.id.split("-")[1]);
		var index = arr.indexOf(id);

		// If the box is checked, add the ID, otherwise remove it
		if (event.currentTarget.checked && index == -1)
			arr.push(id);
		else if (index != -1)
			arr.splice(index, 1);

		updateClone();
	};

	// 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.cloneButton = document.getElementById(elements.cloneButton);
		ui.configCloneTable = document.getElementById(elements.configCloneTable);
		ui.configsNone = document.getElementById(elements.configsNone);
		ui.configTable = document.getElementById(elements.configTable);
		ui.dcOther = document.getElementById(elements.dcOther);
		ui.destBackups = document.getElementById(elements.destBackups);
		ui.destBackupsPrice = document.getElementById(elements.destBackupsPrice);
		ui.destLabel = document.getElementById(elements.destLabel);
		ui.destLinode = document.getElementById(elements.destLinode);
		ui.destLocation = document.getElementById(elements.destLocation);
		ui.destPlan = document.getElementById(elements.destPlan);
		ui.destPlanPrice = document.getElementById(elements.destPlanPrice);
		ui.diskCloneTable = document.getElementById(elements.diskCloneTable);
		ui.disksNone = document.getElementById(elements.disksNone);
		ui.diskTable = document.getElementById(elements.diskTable);
		ui.etaLocal = document.getElementById(elements.etaLocal);
		ui.etaRemote = document.getElementById(elements.etaRemote);
		ui.etaRow = document.getElementById(elements.etaRow);
		ui.linodeLabel = document.getElementById(elements.linodeLabel);
		ui.linodeTag = document.getElementById(elements.linodeTag);
		ui.linodeTagLink = document.getElementById(elements.linodeTagLink);
		ui.loadingConfigs = document.getElementById(elements.loadingConfigs);
		ui.loadingDisks = document.getElementById(elements.loadingDisks);
		ui.newLinode = document.getElementsByClassName(elements.newLinode);
		ui.sourceLocation = document.getElementById(elements.sourceLocation);

		// Register event handlers
		ui.cloneButton.addEventListener("click", handleClone);
		ui.destLinode.addEventListener("input", updateDestination);
		ui.destPlan.addEventListener("input", updatePrices);

		// Get data from API
		apiGet("/linode/instances/" + data.params.lid + "/configs", displayConfigs, null);
		apiGet("/linode/instances/" + data.params.lid + "/disks", displayDisks, null);
		apiGet("/linode/types", displayTypes, null);
		apiGet("/regions", displayRegions, null);
	};

	// Update clone config and disk info
	var updateClone = function()
	{
		// Remove all config and disk rows
		var configDiskRows = document.getElementsByClassName(elements.configDiskRow);
		for (var i = configDiskRows.length - 1; i >= 0; i--)
			configDiskRows[i].remove();

		var allDisks = [];

		// Loop through configs and create rows
		for (var i = 0; i < state.configs.length; i++) {
			// Find config
			var config = null;
			for (var j = 0; j < data.configs.length; j++) {
				if (state.configs[i] == data.configs[j].id) {
					config = data.configs[j];
					break;
				}
			}
			if (!config)
				continue;

			// Add config to table
			ui.configCloneTable.appendChild(createCloneConfigRow(config));

			// Loop through config's disks and add them to array
			for (var disk in config.devices) {
				if (config.devices[disk] && config.devices[disk].disk_id && allDisks.indexOf(config.devices[disk].disk_id) == -1)
					allDisks.push(config.devices[disk].disk_id);
			}
		}

		// Add independent disks to array
		for (var i = 0; i < state.disks.length; i++) {
			if (allDisks.indexOf(state.disks[i]) == -1)
				allDisks.push(state.disks[i]);
		}

		// Loop through disks and create rows
		var totalSize = 0;
		for (var i = 0; i < allDisks.length; i++) {
			// Find disk
			var disk = null;
			for (var j = 0; j < data.disks.length; j++) {
				if (allDisks[i] == data.disks[j].id) {
					disk = data.disks[j];
					break;
				}
			}
			if (!disk)
				continue;

			totalSize += disk.size;

			// Add disk to table
			ui.diskCloneTable.insertBefore(createCloneDiskRow(disk), ui.etaRow);
		}

		// Show/hide the "none" rows
		if (state.configs.length > 0)
			ui.configsNone.style.display = "none";
		else
			ui.configsNone.style.display = "table-row";
		if (allDisks.length > 0)
			ui.disksNone.style.display = "none";
		else
			ui.disksNone.style.display = "table-row";

		// Compute total ETAs
		ui.etaLocal.innerHTML = migrateETA(totalSize, true);
		ui.etaRemote.innerHTML = migrateETA(totalSize, false);
	};

	// Update destination form
	var updateDestination = function(event)
	{
		var display = "none";
		if (ui.destLinode.value == "0")
			display = "table-row";

		for (var i = 0; i < ui.newLinode.length; i++)
			ui.newLinode[i].style.display = display;
	};

	// Update price labels
	var updatePrices = function(event)
	{
		// Find the selected type
		var type = null;
		for (var i = 0; i < data.types.length; i++) {
			if (data.types[i].id == ui.destPlan.value) {
				type = data.types[i];
				break;
			}
		}

		if (!type)
			return;

		ui.destPlanPrice.innerHTML = type.price.monthly;
		ui.destBackupsPrice.innerHTML = type.addons.backups.price.monthly;
	};

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