"use strict";

function init_wrmap(i, jq_map) {
	// define constants
	var EPSG4326 = new OpenLayers.Projection("EPSG:4326"); // lon/lat
	var EPSG3857 = new OpenLayers.Projection("EPSG:3857"); // google

	// extract geojson from map element and clear map element's content
	jq_map = $(jq_map);
	OpenLayers.ImgPath = jq_map.attr('data-img-path'); // e.g. "/mediawiki/extensions/wrmap/openlayers/img/"
	var json_string = jq_map.children().last().text();
	jq_map.empty(); // once parsed, remove geojson string from the map element.
	var format_json = new OpenLayers.Format.JSON();
	var json_js = format_json.read(json_string);
	var format_geojson = new OpenLayers.Format.GeoJSON();
	var features_all = format_geojson.read(json_js);

	// extract, tranform and split features to layers
	var features_path = new Array();
	var features_point = new Array();
	for (var i = 0; i != features_all.length; ++i) {
		var feature = features_all[i];
		feature.geometry.transform(EPSG4326, EPSG3857);
		if (feature.geometry instanceof OpenLayers.Geometry.Point) features_point.push(feature);
		else features_path.push(feature);
	}


	// background layer
	// ----------------
	var layer_map = new OpenLayers.Layer.Google("Google Physical", {
		type: google.maps.MapTypeId.TERRAIN
	});

	// // Alternative: OSM map
	// var layer_map = new OpenLayers.Layer.OSM();
	
	// // Alternative: Microsoft Bing Maps
	// var layer_map = new OpenLayers.Layer.Bing({
	//     type: "Road",
	//     key: "AgPH3SlIXAwajrJKf0FORQyhTqsP8KIlvtN6RKfvxe6fOB6q6-HFmg8EOFm7LSOA"});
	
	// // Alternative: Dummy base layer
	// var layer_map = new OpenLayers.Layer.Vector("Base Layer", {
	//     isBaseLayer: true});

	
	// path layer
	// ----------
	var layer_path = new OpenLayers.Layer.Vector("Path", {
		styleMap: new OpenLayers.StyleMap(new OpenLayers.Style({
				strokeColor: '${getStrokeColor}',
				strokeWidth: '${getStrokeWidth}'
			}, {
				context: {
					getStrokeColor: function(feature) {
						if (feature.attributes.strokeColor !== undefined) return feature.attributes.strokeColor;
						if (feature.attributes.type == 'rodelbahn') return '#014e9a';
						if (feature.attributes.type == 'gehweg') return '#e98401';
						if (feature.attributes.type == 'alternative') return '#7f7fff';
						if (feature.attributes.type == 'lift') return '#000000';
						if (feature.attributes.type == 'anfahrt') return '#e1e100';
						return '#ee9900';
					},
					getStrokeWidth: function(feature) {
						if (feature.attributes.strokeWidth !== undefined) return feature.attributes.strokeWidth;
						if (feature.attributes.type == 'lift' || feature.attributes.type == 'anfahrt') return 3;
						return 6;
					}
				}
			}))
	});

	
	// point layer
	// -----------
	var filter_point_sledrun = new OpenLayers.Filter.Comparison({
		type: OpenLayers.Filter.Comparison.EQUAL_TO,
		property: 'type',
		value: 'sledrun'
	});

	var layer_point = new OpenLayers.Layer.Vector("Point", {
		styleMap: new OpenLayers.StyleMap({
			'default': new OpenLayers.Style({
					graphicZIndex: 12,
					backgroundGraphicZIndex: 11,
				}, {
					context: {
						// the following context functions should only be available in the rule that uses them,
						// but the rule dependent contexts are ignored by OpenLayers (I think that's a bug)
						getCondition: function(feature) {
							if (feature.attributes.condition === undefined) return 0;
							return feature.attributes.condition;
						},
						getSymbol: function(feature) {
							var name = feature.attributes.type;
							return name;
						}
					},
					rules: [
						new OpenLayers.Rule({
							filter: filter_point_sledrun,
							symbolizer: {
								externalGraphic: '/vorlagen/bahnzustand${getCondition}_0.png',
								graphicWidth: 17,
								graphicHeight: 17,
								graphicXOffset: -8,
								graphicYOffset: -8,
								backgroundGraphic: "/vorlagen/gmap_rodelbahn_c_s.png",
								backgroundWidth: 23,
								backgroundHeight: 23,
								backgroundXOffset: -8,
								backgroundYOffset: -8,
							}
						}),
						new OpenLayers.Rule({
							elseFilter: true,
							symbolizer: {
								externalGraphic: '/vorlagen/gmap_${getSymbol}.png',
								graphicWidth: 20,
								graphicHeight: 34,
								graphicXOffset: -10,
								graphicYOffset: -33,
							}
						})
					]
				}),
			highlight: new OpenLayers.Style({
					label: "${getTitle}",
					labelOutlineColor: "white",
					fontWeight: "bold"
				}, {
					context: {
						getTitle: function(feature) {
							var title = '';
							if (feature.attributes.type != 'point') {
								title = feature.attributes.type;
								title = title.charAt(0).toUpperCase() + title.slice(1); // First letter uppercase
								if (feature.attributes.name !== undefined) title += ': ';
							}
							if (feature.attributes.name !== undefined) title += feature.attributes.name;
							return title;
						}
					},
					rules: [
						new OpenLayers.Rule({
							filter: filter_point_sledrun,
							symbolizer: {
								label: "${name}",
								labelYOffset: 14
							}
						}),
						new OpenLayers.Rule({
							elseFilter: true,
							symbolizer: {
								labelYOffset: 40
							}
						})
					]
				}) 
		}),
		rendererOptions: {yOrdering: true}
	});


	// map itself
	// ----------
	var lon = json_js.properties.lon;
	var lat = json_js.properties.lat;
	var zoom = json_js.properties.zoom;
	var width = json_js.properties.width;
	var height = json_js.properties.height;
	if (zoom === undefined) zoom = 10; // default zoom
	if (width === undefined) width = '100%'; // default width
	if (height === undefined) height = 450;  // default: 450 pixel
	jq_map.width(width);
	jq_map.height(height);
	var map = new OpenLayers.Map(jq_map.context, {
		projection: EPSG3857,
		displayProjection: EPSG4326,
		units: "m",
		theme: null,
		layers: [layer_map, layer_path, layer_point],
		center: new OpenLayers.LonLat(lon, lat).transform(EPSG4326, EPSG3857),
		zoom: zoom
	});
	

	// add features
	// if this would be done before the layer is added to the map, the features are not added
	layer_path.addFeatures(features_path); 
	layer_point.addFeatures(features_point); 

	// disable mouse wheel zoom
	var navigation_control = map.getControlsByClass('OpenLayers.Control.Navigation')[0];
	navigation_control.disableZoomWheel();

	// layer switcher
	// map.addControl(new OpenLayers.Control.LayerSwitcher());

	// print sledrun name when mouse moves over it
	map.addControl(new OpenLayers.Control.SelectFeature(layer_point, {
		hover: true,
		highlightOnly: true,
		autoActivate: true,
		renderIntent: "highlight"
	}));

	// show popup when user clicks on a sledrun icon
	map.addControl(new OpenLayers.Control.SelectFeature(layer_point, {
		autoActivate: true,
		toggle: true,
		onSelect: function(feature) {
			var popup_text = '';
			if (feature.attributes.type == 'sledrun') {
				popup_text += "<h2>" + feature.attributes.name + '</h2>\n' +
				'<ul>\n' +
				'<li><a href="' + feature.attributes.wiki + '">Details zur Rodelbahn</a></li>\n' + 
				'<li>Rodelbahnzustand<br/>';
				if (feature.attributes.condition !== undefined) {
					var condition_text = {1: 'Sehr gut', 2: 'Gut', 3: 'Mittelm&auml;&szlig;ig', 4: 'Schlecht', 5: 'Geht nicht'};
					var year_month_day = feature.attributes.date_report.split('-');
					popup_text += '<a href="' + feature.attributes.wiki + '#Eintr.C3.A4ge">' + condition_text[feature.attributes.condition] + '</a> ' + 
					'<small>' + year_month_day[2] + '.' + year_month_day[1] + '.</small> ' +
					'<em><a href="' + feature.attributes.wiki + '#Eintragen">Neu</a></em>';
				} else {
					popup_text += '<em><a href="' + feature.attributes.wiki + '#Eintragen">Bitte eintragen</a></em>';
				}
				popup_text += '</li>\n</ul>\n';
			} else if (feature.attributes.wiki !== undefined) {
				if (feature.attributes.name != undefined) popup_text += '<h2>' + feature.attributes.name + '</h2>\n';
				popup_text += '<p><a href="' + feature.attributes.wiki + '">Details</a></p>\n';
			} else return;

			// Open popup
			var selectFeatureControl = this;
			var popup = new OpenLayers.Popup.FramedCloud('sledruninfopopup_' + feature.attributes.wiki, 
			feature.geometry.getBounds().getCenterLonLat(),
			null,
			popup_text,
			null, true, function(event) {
				// onPopupClose
				selectFeatureControl.unselectAll();
			});
			feature.popup = popup;
			map.addPopup(popup);
		},
		onUnselect: function(feature) {
			if (feature.popup === null) return;

			// Close popup
			map.removePopup(feature.popup);
			feature.popup.destroy();
			feature.popup = null;
		}
	}));
}


function init_wrmaps() {
	var jq_maps = $('.wrmap'); // all wrmap <div> elements
	jq_maps.each(init_wrmap);
}


$(document).ready(init_wrmaps);