/**********************************************************************
 * events.js                                                          *
 * script for event specific functions and setup                      *
 **********************************************************************/

/*	License
	Copyright 2014 Kasper D. Fischer <kasper.fischer@rub.de>

	This program 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.

	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 General Public License
	for more details.

	You should have received a copy of the GNU General Public License along
	with this program. If not, see http://www.gnu.org/licenses/.

	$Id$
*/

/* do reverse geolocation lookup */
function getGeolocation(id, lat, lng) {
	if ( !geolocationTable[id] ) {
		// $.getJSON( "//nominatim.openstreetmap.org/reverse", { lat: lat, lon: lng, zoom: 10, format: "json" } )
		$.getJSON( "//open.mapquestapi.com/nominatim/v1/reverse.php", { lat: lat, lon: lng, zoom: 10, format: "json" } )
			.done(function( json ) {
				var city = json.address["city"];
				var country = json.address["country"];
				var countryCode = json.address["country_code"].toUpperCase();
				geolocationTable[id] = city;
				( country != "Deutschland" ) ? geolocationTable[id] = geolocationTable[id] + " ("+countryCode+")" : null;
				if ( city ) {
					$("#eventstable a.toggle[eventid="+id+"]").text(geolocationTable[id]);
					var sort = [[0,1],[1,1],[2,1]];
					$("#eventstable").trigger("update", [true]);
					$("#eventstable").trigger("updateCache");
					$("#eventstable").trigger("sorton", [sort]);
				} else {
					console.log("Nominatim did not provide a city tag for "+lat+" / "+lng);
				};
			})
			.fail(function( jqxhr, textStatus, error ) {
				var err = textStatus + ", " + error;
				console.log( "Request Failed: " + err );
		});
	};
};

/* Load events using ajax */
function ajaxLoadEvents(stime, etime) {
	var mapBounds = map.getBounds();
	var N = mapBounds.getNorth();
	var E = mapBounds.getEast();
	var S = mapBounds.getSouth();
	var W = mapBounds.getWest();
	var d = 0.1;
	if ( !stime ) {
		var stime = new Date();
		stime.setDate(stime.getDate()-180);
	};
	if ( !etime ) {
		var etime = new Date();
		etime.setDate(etime.getDate()+1);
	};
	var url = "https://ariadne.geophysik.ruhr-uni-bochum.de/fdsnws/event/1/query"
	var request_data = {
		starttime: sprintf("%d-%02d-%02d", stime.getFullYear(), stime.getMonth()+1, stime.getDate()),
		endtime: sprintf("%d-%02d-%02d", etime.getFullYear(), etime.getMonth()+1, etime.getDate()),
		minlat: S-d,
		maxlat: N+d,
		minlon: W-d,
		maxlon: E+d,
		minmag: minMag-0.1,
	};
	$.ajax({
		type: "GET",
		url: url,
		data: request_data,
		dataType: "xml",
		success: function (xml) {
			$(xml).find('event').each(function () {
				var id = $(this).attr('publicID').split('/')[2];
				var mag = $(this).find('magnitude > mag > value').text();
				var otime = $(this).find('origin > time > value').text();
				var lng = $(this).find('origin > longitude > value').text();
				var lat = $(this).find('origin > latitude > value').text();
				var mag = $(this).find('magnitude > mag > value').text();
				var evaluationMode = $(this).find('evaluationMode').text();
				var evaluationStatus = $(this).find('evaluationStatus').text();
				var type = $(this).find('type').last().text();
				var location = getLocation(Number(lat), Number(lng))[0];
				( location ) ? null : location = $(this).find('description > text').text();
				// create table row: Date, Time, Mag, Location
				if ( !eventTable[id] && ( type == 'earthquake' || type == 'induced or triggered event' || type == 'outside of network interest') && evaluationMode != 'automatic' && evaluationStatus != 'preliminary' && Number(mag)+0.05 >= minMag ) {
					var row = '<tr class="tablesorter-hasChildRow">'
							+ '<td class="utctime-date">'+otime.split('.')[0]+'Z</td>'
							+ '<td class="utctime-time">'+otime.split('.')[0]+'Z</td>'
							+ sprintf('<td class="ar">%.1f</td>', Number(mag))
							+ '<td><a href="#" class="toggle" eventid="'+id+'">'+location+'</a><a class="map-link" href="#" eventid="'+id+'">Karte</a></td>'
							+ '</tr>';
					row += '<tr class="tablesorter-childRow">'
						+ '<td colspan="4" eventid="'+id+'">not implemented</td></tr>';
					var added = $('#eventstable tbody').append(row);
					added.find('.tablesorter-childRow td').hide();
					$('#eventstable').find('td.utctime-date').each(function() {
						$.localtime.formatObject($(this), "dd.MM.yyyy");
						$(this).removeClass('utctime-date');
						$(this).addClass('localtime-date');
					});
					$('#eventstable').find('td.utctime-time').each(function() {
						$.localtime.formatObject($(this), "HH:mm");
						$(this).removeClass('utctime-time');
						$(this).addClass('localtime-time');
					});
					// create marker
					var marker = addEventMarker(id, Number(lat), Number(lng), Number(mag));
					var text = sprintf('<h3 eventid="%s">%s</h3>', id, location)
							+ sprintf('<p>Ereignis: %s</br>', id)
							+ sprintf('Ort: %.4f °N, %.4f °O </br>', Number(lat), Number(lng))
							+ sprintf('Zeit: <span class="utctime">%sZ</span></p>', otime.split('.')[0], otime.split('.')[0]);
					marker.bindPopup(text);
					// try to get better location with reverse geolocation lookup (nominatim), check cache first
					( geolocationTable[id] ) ? $("#eventstable a.toggle[eventid="+id+"]").text(geolocationTable[id]) : getGeolocation(id, lat, lng);
				};
			});
		},
		complete: function () {
			initStationTable();
			var sort = [[0,1],[1,1],[2,1]];
			$("#eventstable").trigger("update", [true]);
			$("#eventstable").trigger("updateCache");
			$("#eventstable").trigger("sorton", [sort]);
			initMapLink();
		},
		error: function( jqxhr, textStatus, error ) {
			var err = textStatus + ", " + error;
			console.log( "Request Failed: " + err );
		}
	});
};

/* add row to table
	obsolete         */
function addEventRow(id, props) {
	$('#eventstable').tablesorter({
		sortList: "[[0,0], [1,1]], [2,1]",
		resort: true,
		showProcessing: true,
		pager_size: 35
	});
	var html = '<tr class="tablesorter-hasChildRow">'
		+ '<td class="utctime-date">'+props.date+'T'+props.time.split('.')[0]+'Z</td>'
		+ '<td class="utctime-time">'+props.date+'T'+props.time.split('.')[0]+'Z</td>'
		+ '<td class="ar">'+props.mag+'</td>'
		+ '<td><a href="#" class="toggle">'+props.location+'</a><a class="map-link" href="#" eventid="'+id+'">Karte</a></td>'
		+ '</tr>'
		+ '<tr class="tablesorter-childRow">'
		+ '<td colspan="4" eventid="'+id+'">'
		+ "<pre>ID                     "+id+"\n\n"
		+ "Origin\n"
		+ "Date                   "+props.date+"\n"
		+ "Time                   "+props.time+"\n"
		+ "Latitude                "+props.lat+" deg  +/-    "+props.lat_err+" km\n"
		+ "Longitude                "+props.lon+" deg  +/-    "+props.lon_err+" km\n"
		+ "Depth                       "+props.depth+" km   +/-    "+props.depth_err+" km\n"
		+ "Residual RMS             "+props.rms+" s\n"
		+ "Azimuthal gap             "+props.gap+" deg\n\n"
		+ props.no_phases + " Phase arrivals:\n"
		+ "sta  net   dist azi  phase   time         res     wt  sta\n";
	for ( i = 0 ; i < props.no_phases ; i++ ) {
		html +=  props.phases[i];
		( i < props.no_phases -1 ) ? html += "\n" : null ;
	};
	html += "</pre></td></tr>\n"; 
	var added = $('#eventstable tbody').append(html);
	added.find('.tablesorter-childRow td').hide();
	$('#eventstable').find('td.utctime-date').each(function() {
		$.localtime.formatObject($(this), "dd. MM. yyyy");
		$(this).removeClass('utctime-date');
		$(this).addClass('localtime-date');
	});
	$('#eventstable').find('td.utctime-time').each(function() {
		$.localtime.formatObject($(this), "HH:mm");
		$(this).removeClass('utctime-time');
		$(this).addClass('localtime-time');
	});
	// force resorting
	$("#eventstable").trigger("update", [true]);
};

/* toggles visibility of filtered markers
 * only events in the event list are shown */
function toggleFilteredMarkers() {
	// show all shown events in map
	$("#eventstable > tbody > tr:not(.filtered) > td > a.map-link").each( function() {
		if ( $(this).attr("eventid") ) {
			eventTable[$(this).attr("eventid")].setStyle({opacity: 1, strokeOpacity: 1, fillOpacity: eventMarkerOpacity});
		};
	});

	// hide filtered events in map
	$("#eventstable > tbody > tr.filtered > td > a.map-link").each( function() {
		if ( $(this).attr("eventid") ) {
			eventTable[$(this).attr("eventid")].setStyle({opacity: 0, strokeOpacity: 0, fillOpacity: 0});
		};
	});
	highlightFirstEvent();
};

/* Highlight the first event of the event list on the map if no
 * other event is selected                                      */
function highlightFirstEvent() {
	var highlightStyle = {
		color: 'red',
		fillColor: '#f03',
	};
	var normalStyle = {
		fillColor: "#FFF500",
		color: "#FFF500"
	};
	$("#eventstable a.map-link").each( function() {
		if ( $(this).attr("eventid") ) {
			eventTable[$(this).attr("eventid")].setStyle(normalStyle);
			$(this).removeClass('first');
			$(this).text('Karte');
		};
	});
	$("#eventstable > tbody > tr:not(.filtered)").first().find("a.map-link").each(function() {
		if ( $(this).attr("eventid") ) {
			eventTable[$(this).attr("eventid")].setStyle(highlightStyle);
			$(this).addClass('first');
			$(this).text('Karte (rot)');
		};
	});
};

function highlightEvent( id ) {
	var highlightStyle = {
		color: 'red',
		fillColor: '#f03',
	};
	var normalStyle = {
		fillColor: "#FFF500",
		color: "#FFF500"
	};
	$("#eventstable > tbody > tr:not(.filtered)").find("a.map-link").each( function() {
		if ( $(this).attr("eventid") ) {
			if ( $(this).attr("eventid") == id ) {
				eventTable[$(this).attr("eventid")].setStyle(highlightStyle);
				$(this).addClass('first');
				$(this).text('Karte (rot)');
			} else {
				eventTable[$(this).attr("eventid")].setStyle(normalStyle);
				$(this).removeClass('first');
				$(this).text('Karte');
			}
		};
	});
};

/**********************************************************************
 * document ready                                                     *
 **********************************************************************/
$(document).ready(function() {
	// tablesorter for event list
	$("#eventstable").tablesorter(
		{
			theme : 'blue',
			dateFormat : "ddmmyyyy",
			headers: {
				0: { sorter: "shortDate" }
			},
			cssChildRow: "tablesorter-childRow", // this is the default setting
			widgets: ["uitheme", "zebra", "filter", "pager"], // initialize zebra and filter widgets, "scroller"
			widgetOptions: {
				// possible variables: {page}, {totalPages}, {filteredPages}, {startRow}, {endRow}, {filteredRows} and {totalRows}
				pager_output: '# {startRow} - {endRow} ({totalRows}) | Seite {page} ({totalPages})',
				pager_removeRows: false,
				pager_size: 35,
				filter_childRows  : true,
				filter_cssFilter  : 'tablesorter-filter',
				filter_startsWith : false,
				filter_ignoreCase : true,
				scroller_height: $('div.map').height() - 250,
				scroller_barWidth: 10,
				scroller_jumpToHeader: false,
				sortList: "[[0,1], [1,1], [2,1]]",
				resort: true,
				showProcessing: true,
			}
		});

	// hide child rows
	$('#eventstable > tbody > tr.tablesorter-childRow td').hide();

	// update map after filtering
	$('#eventstable').bind('filterEnd', function(){
		toggleFilteredMarkers();
	});
	
	// highlight first event
	$('#eventstable').bind('sortEnd', function(){
		highlightFirstEvent();
	});
	
	// show / hide event info
	$('#eventstable').delegate('.toggle', 'click' , function(){
		// toggle visibility of selected row
		$(this).closest('tr').nextUntil('tr.tablesorter-hasChildRow').find('td').toggle('slow');

		// mark currently selected row and remove class selected from all other rows
		// hide other rows
		$(this).closest('tr').nextUntil('tr.tablesorter-hasChildRow').find('td').addClass('selected-now');
		$(this).closest('tbody').find('td.selected').each(function(){
			if ( ! $(this).hasClass('selected-now') ) {
				$(this).hide('slow');
				$(this).removeClass('selected');
			};
		});
		$(this).closest('tr').nextUntil('tr.tablesorter-hasChildRow').find('td').each(function(){
			$(this).removeClass('selected-now');
			var selected = $(this).hasClass('selected');
			if ( selected ) {
				$(this).removeClass('selected');
			} else {
				$(this).addClass('selected');
			};
		});

		return false;
	});

});