/**
 * @copyright Copyright (c) 2016 Bjoern Schiessle <bjoern@schiessle.org>
 *
 * @license GNU AGPL version 3 or any later version
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

(function ($, OC) {

	var memoryUsageChart,
		memoryUsageLine,
		swapUsageLine,
		cpuLoadChart,
		cpuLoadLine,
		activeusersChart,
		sharesChart;

	$(document).ready(function () {

		var updateTimer = setInterval(updateInfo, 1000);

		resizeSystemCharts();
		updateActiveUsersStatistics();
		updateShareStatistics();

		setHumanReadableSizeToElement("databaseSize");
		setHumanReadableSizeToElement("phpMemLimit");
		setHumanReadableSizeToElement("phpUploadMaxSize");
		setHumanReadableSizeToElement("systemDiskFreeSpace");

		initMonitoringLinkToClipboard();
		$("#monitoring-endpoint-url").on('click', function() {
			$(this).select();
		});

		function updateInfo() {
			var url = OC.generateUrl('/apps/serverinfo/update');

			$.get(url).success(function (response) {
				updateCPUStatistics(response.system.cpuload);
				updateMemoryStatistics(response.system.mem_total, response.system.mem_free, response.system.swap_total, response.system.swap_free);
			});
		}
	});

	$(window).resize(function () {
		resizeSystemCharts();
	});

	function updateCPUStatistics (cpuload) {

		var cpu1 = cpuload[0],
			cpu2 = cpuload[1],
			cpu3 = cpuload[2];

		if (typeof cpuLoadChart === 'undefined') {
			cpuLoadChart = new SmoothieChart(
			{
				millisPerPixel: 250,
				minValue: 0,
				grid: { fillStyle: 'rgba(0,0,0,0.03)', strokeStyle: 'transparent' },
				labels: { fillStyle: 'rgba(0,0,0,0.4)', fontSize: 12 }
			});
			cpuLoadChart.streamTo(document.getElementById("cpuloadcanvas"), 1000/*delay*/);
			cpuLoadLine = new TimeSeries();
			cpuLoadChart.addTimeSeries(cpuLoadLine, { lineWidth: 1, strokeStyle: 'rgb(0, 0, 255)', fillStyle: 'rgba(0, 0, 255, 0.2)' });
		}

		$('#cpuFooterInfo').text(t('serverinfo', 'Load average')+": "+cpu1+" ("+t('serverinfo', 'Last minute')+")");
		cpuLoadLine.append(new Date().getTime(), cpu1);
	}

	function updateMemoryStatistics (memTotal, memFree, swapTotal, swapFree) {
		if (memTotal === 'N/A' || memFree === 'N/A') {
			$('#memFooterInfo').text(t('serverinfo', 'Memory info not available'));
			$('#memorycanvas').addClass('hidden');
			return;
		}

		var memTotalBytes = memTotal * 1024,
			memUsageBytes = (memTotal - memFree) * 1024,
			memTotalGB = memTotal / (1024 * 1024),
			memUsageGB = (memTotal - memFree) / (1024 * 1024);

		var swapTotalBytes = swapTotal * 1024,
			swapUsageBytes = (swapTotal - swapFree) * 1024,
			swapTotalGB = swapTotal / (1024 * 1024),
			swapUsageGB = (swapTotal - swapFree) / (1024 * 1024);

		if (memTotalGB > swapTotalGB) {
			var maxValueOfChart = memTotalGB;
		} else {
			var maxValueOfChart = swapTotalGB;
		}

		if (typeof memoryUsageChart === 'undefined') {
			memoryUsageChart = new SmoothieChart(
			{
				millisPerPixel: 250,
				maxValue: maxValueOfChart,
				minValue: 0,
				grid: { fillStyle: 'rgba(0,0,0,0.03)', strokeStyle: 'transparent' },
				labels: { fillStyle: 'rgba(0,0,0,0.4)', fontSize: 12 }
			});
			memoryUsageChart.streamTo(document.getElementById("memorycanvas"), 1000/*delay*/);
			memoryUsageLine = new TimeSeries();
			memoryUsageChart.addTimeSeries(memoryUsageLine, {lineWidth:1, strokeStyle:'rgb(0, 255, 0)', fillStyle:'rgba(0, 255, 0, 0.2)'});
			swapUsageLine = new TimeSeries();
			memoryUsageChart.addTimeSeries(swapUsageLine, {lineWidth:1, strokeStyle:'rgb(255, 0, 0)', fillStyle:'rgba(255, 0, 0, 0.2)'});
		}

		$('#memFooterInfo').text("RAM: "+t('serverinfo', 'Total')+": "+OC.Util.humanFileSize(memTotalBytes)+" - "+t('serverinfo', 'Current usage')+": "+OC.Util.humanFileSize(memUsageBytes));
		memoryUsageLine.append(new Date().getTime(), memUsageGB);
		$('#swapFooterInfo').text("SWAP: "+t('serverinfo', 'Total')+": "+OC.Util.humanFileSize(swapTotalBytes)+" - "+t('serverinfo', 'Current usage')+": "+OC.Util.humanFileSize(swapUsageBytes));
		swapUsageLine.append(new Date().getTime(), swapUsageGB);
	}

	function updateShareStatistics () {

		var shares = $('#sharecanvas').data('shares'),
			shares_data = [shares.num_shares_user, shares.num_shares_groups, shares.num_shares_link, shares.num_fed_shares_sent, shares.num_fed_shares_received],
			stepSize = 0;

		if (Math.max.apply(null, shares_data) < 10) {
			stepSize = 1;
		}

		if (typeof sharesChart === 'undefined') {
			var ctx = document.getElementById("sharecanvas");

			sharesChart = new Chart(ctx, {
				type: 'bar',
				data: {
					labels: [
						t('serverinfo', 'Users'),
						t('serverinfo', 'Groups'),
						t('serverinfo', 'Links'),
						t('serverinfo', 'Federated sent'),
						t('serverinfo', 'Federated received')
					],
					datasets: [{
						label: " ",
						data: shares_data,
						backgroundColor: [
							'rgba(0, 0, 255, 0.2)',
							'rgba(0, 255, 0, 0.2)',
							'rgba(255, 0, 0, 0.2)',
							'rgba(0, 255, 255, 0.2)',
							'rgba(255, 0, 255, 0.2)'
						],
						borderColor: [
							'rgba(0, 0, 255, 1)',
							'rgba(0, 255, 0, 1)',
							'rgba(255, 0, 0, 1)',
							'rgba(0, 255, 255, 1)',
							'rgba(255, 0, 255, 1)'
						],
						borderWidth: 1
					}]
				},
				options: {
					legend: { display:false },
					scales: {
						yAxes: [{
							ticks: {
								min: 0,
								stepSize: stepSize
							}
						}]
					}
				}
			});
		}

		sharesChart.update();
	}

	function updateActiveUsersStatistics () {

		var activeUsers = $('#activeuserscanvas').data('users'),
			activeUsers_data = [activeUsers.last24hours, activeUsers.last1hour, activeUsers.last5minutes],
			stepSize = 0;

		if (Math.max.apply(null, activeUsers_data) < 10) {
			stepSize = 1;
		}

		if (typeof activeusersChart === 'undefined') {
			var ctx = document.getElementById("activeuserscanvas");

			activeusersChart = new Chart(ctx, {
				type: 'line',
				data: {
					labels: [
						t('serverinfo', 'Last 24 hours'),
						t('serverinfo', 'Last 1 hour'),
						t('serverinfo', 'Last 5 mins')
					],
					datasets: [{
						label: " ",
						data: activeUsers_data,
						fill: false,
						borderColor: [ 'rgba(0, 0, 255, 1)' ],
						borderWidth: 1,
						borderDashOffset: 0.0,
						borderJoinStyle: 'miter',
						pointBorderColor: 'rgba(0, 0, 255, 1)',
						pointBackgroundColor: "#fff",
						pointBorderWidth: 1,
						pointHoverRadius: 5,
						pointHoverBackgroundColor: "rgba(0,0,255,0.6)",
						pointHoverBorderColor: "rgba(0, 0, 255, 1)",
						pointHoverBorderWidth: 1,
						pointRadius: 5,
						pointHitRadius: 10,
						lineTension: 0
					}]
				},
				options: {
					legend: { display:false },
					scales: {
						yAxes: [{
							ticks: {
								min: 0,
								stepSize: stepSize
							}
						}]
					}
				}
			});
		}
	}

	function setHumanReadableSizeToElement (elementId) {
		var maxUploadSize = parseInt($('#' + elementId).text());

		if ($.isNumeric(maxUploadSize)) {
			$('#' + elementId).text(OC.Util.humanFileSize(maxUploadSize));
		}
	}

	function resizeSystemCharts () {

		var cpu_canvas = document.getElementById("cpuloadcanvas"),
			mem_canvas = document.getElementById("memorycanvas");

		var newWidth = $('#cpuSection').width();
			newHeight = newWidth / 4

		if (newWidth <= 100) newWidth = 100;
		if (newHeight > 150) newHeight = 150;

		cpuloadcanvas.width = newWidth;
		cpuloadcanvas.height = newHeight;

		mem_canvas.width = newWidth;
		mem_canvas.height = newHeight;
	}

	function initMonitoringLinkToClipboard() {
		var monAPIBox = $("#ocsEndPoint");
		/* reused from settings/js/authtoken_view.js */
		monAPIBox.find('.clipboardButton').tooltip({placement: 'bottom', title: t('core', 'Copy'), trigger: 'hover'});

		// Clipboard!
		var clipboard = new Clipboard('.clipboardButton');
		clipboard.on('success', function(e) {
			var $input = $(e.trigger);
			$input.tooltip('hide')
				.attr('data-original-title', t('core', 'Copied!'))
				.tooltip('fixTitle')
				.tooltip({placement: 'bottom', trigger: 'manual'})
				.tooltip('show');
			_.delay(function() {
				$input.tooltip('hide')
					.attr('data-original-title', t('core', 'Copy'))
					.tooltip('fixTitle');
			}, 3000);
		});
		clipboard.on('error', function (e) {
			var $input = $(e.trigger);
			var actionMsg = '';
			if (/iPhone|iPad/i.test(navigator.userAgent)) {
				actionMsg = t('core', 'Not supported!');
			} else if (/Mac/i.test(navigator.userAgent)) {
				actionMsg = t('core', 'Press ⌘-C to copy.');
			} else {
				actionMsg = t('core', 'Press Ctrl-C to copy.');
			}

			$input.tooltip('hide')
				.attr('data-original-title', actionMsg)
				.tooltip('fixTitle')
				.tooltip({placement: 'bottom', trigger: 'manual'})
				.tooltip('show');
			_.delay(function () {
				$input.tooltip('hide')
					.attr('data-original-title', t('core', 'Copy'))
					.tooltip('fixTitle');
			}, 3000);
		});
	}

})(jQuery, OC);