/*
 * 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.detachButton = "detach-button";
	elements.label = "label";
	elements.linodeLabel = "linode-label";
	elements.volumeLabel = "volume-label";

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

	// Static references to UI elements
	var ui = {};
	ui.detachButton = {};
	ui.label = {};
	ui.linodeLabel = {};
	ui.volumeLabel = {};

	// Callback for attached linode API call
	var displayLinode = function(response)
	{
		ui.linodeLabel.innerHTML = response.label;
		ui.detachButton.disabled = false;
	};

	// Callback for volume API call
	var displayVolume = function(response)
	{
		data.volume = response;

		// Redirect to settings if unattached
		if (!data.volume.linode_id)
			location.href = "/volumes/settings?vid=" + data.params.vid;

		// Set page title and header stuff
		document.title += " // " + data.volume.label;
		ui.volumeLabel.innerHTML = data.volume.label;
		ui.label.innerHTML = data.volume.label;
		ui.linodeLabel.href = "/linodes/dashboard?lid=" + data.volume.linode_id;

		// Get linode info
		apiGet("/linode/instances/" + data.volume.linode_id, displayLinode, null);
	};

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

		apiPost("/volumes/" + data.params.vid + "/detach", {}, function(response)
		{
			location.href = "/linodes/dashboard?lid=" + data.volume.linode_id;
		});
	};

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

		// We need a volume ID, so die if we don't have it
		if (!data.params.vid) {
			alert("No volume ID supplied!");
			return;
		}

		setupHeader();

		// Update links on page to include proper volume ID
		var anchors = document.getElementsByTagName("a");
		for (var i = 0; i < anchors.length; i++)
			anchors[i].href = anchors[i].href.replace("vid=0", "vid=" + data.params.vid);

		// Get element references
		ui.detachButton = document.getElementById(elements.detachButton);
		ui.label = document.getElementById(elements.label);
		ui.linodeLabel = document.getElementById(elements.linodeLabel);
		ui.volumeLabel = document.getElementById(elements.volumeLabel);

		// Attach event handlers
		ui.detachButton.addEventListener("click", handleDetach);

		// Get data from API
		apiGet("/volumes/" + data.params.vid, displayVolume, null);
	};

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