"use strict";
/*
// "User defined" popup class to be able to specify a minimum size for the popup,
// so that Safari 7.0 displays it correctly (see ticket #89).
OpenLayers.Popup.WrInfo = OpenLayers.Class(OpenLayers.Popup.FramedCloud, {
	minSize: new OpenLayers.Size(180, 260),

	initialize: function(id, lonlat, contentSize, contentHTML, anchor, closeBox, closeCallback) {
		OpenLayers.Popup.FramedCloud.prototype.initialize.apply(this, arguments);
	},

	CLASS_NAME: "OpenLayers.Popup.WrInfo"
});
*/


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

	// tool functions
	function createElement(tagName, attributes) {
		var element = $(document.createElement(tagName));
		if (attributes === undefined) return element;
		for (var attribute in attributes) {
			element.attr(attribute, attributes[attribute]);
		}
		return element;
	}

	function appendElement(parentElement, tagName, attributes) {
		if (attributes === undefined) attributes = {};
		var element = createElement(tagName, attributes);
		parentElement.append(element);
		return element;
	}


	// extract geojson from map element and clear map element's content
	jq_map = $(jq_map);
	var ext_path = jq_map.attr('data-ext-path'); // e.g. '/mediawiki/extensions/wrmap'
	var img_path = ext_path + '/img';
	var json_string = jq_map.children().last().text();
	jq_map.empty(); // once parsed, remove geojson string from the map element.
	var json_js = JSON.parse(json_string);
	var format_geojson = new ol.format.GeoJSON();
	var features_all = format_geojson.readFeatures(json_js, {dataProjection: EPSG4326, featureProjection: EPSG3857});


	// background layer
	// ----------------

	// OSM map
	var layer_map = new ol.layer.Tile({
		source: new ol.source.OSM()
	});


	/*
	// Microsoft Bing Maps
	// var layer_map = new OpenLayers.Layer.Bing({
	// 	type: "Road",
	// 	key: "AgPH3SlIXAwajrJKf0FORQyhTqsP8KIlvtN6RKfvxe6fOB6q6-HFmg8EOFm7LSOA",
	// 	tileOptions: {crossOriginKeyword: null}});

	// // Alternative: Base map
	// // see: http://www.basemap.at
	
	// // Alternative: OpenTopoMap
	// // see: https://opentopomap.org/about

	// // Alternative: Dummy base layer
	// var layer_map = new OpenLayers.Layer.Vector("Base Layer", {
	//     isBaseLayer: true});
	*/


	// path layer
	// ----------

	function get_feature_title(feature) {
		var title = feature.get('type');
		if (title == 'sledrun') return feature.get('name');
		title = title.charAt(0).toUpperCase() + title.slice(1); // first letter uppercase
		if (feature.get('name')) title += ': ' + feature.get('name');
		return title;
	}

	// Returns 0 to 5 for features that represent sledruns as their condition
	var get_sledrun_condition = function(feature) {
		var condition = feature.get('condition');
		if (condition === undefined) return 0;
		return condition;
	}

	function style_point_function(feature, resolution) {
		if (feature.get('type') == 'sledrun') {
			var condition = get_sledrun_condition(feature);
			var src = img_path + '/marker_c_sledrun_' + condition + 'nn.png';
			return new ol.style.Style({
				image: new ol.style.Icon({
					src: src,
					imgSize: [17, 17],
					anchor: [0.5, 0.5]
				}),
			});
		} else {
			var src = img_path + '/marker_p_' + feature.get('type') + '.png';
			return new ol.style.Style({
				image: new ol.style.Icon({
					src: src,
					imgSize: [20, 34],
					anchor: [0.5, 1.0]
				}),
			});
		}
	}

	function style_point_function_selected(feature, resolution) {
		var style = style_point_function(feature, resolution);
		style.setText(new ol.style.Text({
			text: get_feature_title(feature),
			font: 'icon',
			offsetY: 14,
			stroke: new ol.style.Stroke({
				color: '#ddd',
				width: 2,
			}),
		}));
		return style;
	}

	function style_path_function(feature, resolution) {
		var line_color = {
			'rodelbahn': '#014e9a',
			'gehweg': '#e98401',
			'alternative': '#7f7fff',
			'lift': '#000000',
			'anfahrt': '#e1e100'
		};
		var color = feature.get('strokeColor') || line_color[feature.get('type')] || '#e7525b';
		var width = (feature.get('type') in ['lift', 'anfahrt']) ? 3 : 6;
		return new ol.style.Style({
			stroke: new ol.style.Stroke({
				color: color,
				width: width
			})
		});
	}

	function style_function(feature, resolution) {
		if (feature.getGeometry() instanceof ol.geom.Point) return style_point_function(feature, resolution);
		return style_path_function(feature, resolution);
	};

	function style_function_selected(feature, resolution) {
		if (feature.getGeometry() instanceof ol.geom.Point) return style_point_function_selected(feature, resolution);
		return style_path_function(feature, resolution);
	};


	// popup overlay
	// -------------
	var popup_container = document.getElementById('popup');
	var popup_content = document.getElementById('popup-content');
	var popup_closer = document.getElementById('popup-closer');
	var popup_overlay = new ol.Overlay({element: popup_container, autoPan: true, autoPanAnimation: {duration: 250}});
	popup_closer.onclick = function() {popup_overlay.setPosition(undefined); popup_closer.blur(); return false;};

	function create_popup_dom(feature) {
		var popup_div = createElement('div');

		// name
		if (feature.get('name') !== undefined && (feature.get('wiki') !== undefined || feature.get('thumb_url') !== undefined)) {
			var h2 = appendElement(popup_div, 'h2');
			if (feature.get('wiki') === undefined) h2.text(feature.get('name'));
			else appendElement(h2, 'a', {href: feature.get('wiki')}).text(feature.get('name'));
		}

		// sledrun information
		if (feature.get('type') == 'sledrun') {
			var p = appendElement(popup_div, 'p').text('Rodelbahnzustand').append(createElement('br'));
			if (feature.get('condition') !== undefined) {
				var condition_text = {1: 'Sehr gut', 2: 'Gut', 3: 'Mittelmäßig', 4: 'Schlecht', 5: 'Geht nicht'};
				var year_month_day = feature.get('date_report').split('-');
				p.append(createElement('a', {href: feature.get('wiki') + '#Eintr.C3.A4ge'}).text(condition_text[feature.get('condition')]), ' ');
				p.append(createElement('small').text(year_month_day[2] + '.' + year_month_day[1] + '.'), ' ');
				p.append(createElement('em').append(createElement('a', {href: feature.get('wiki') + '#Eintragen'}).text('Neu')));
			} else {
				p.append(createElement('em').append(createElement('a', {href: feature.get('wiki') + '#Eintragen'}).text('Bitte eintragen')));
			}
		}

		// wiki link
		if (feature.get('wiki') !== undefined) {
			var a = appendElement(appendElement(popup_div, 'p'), 'a', {href: feature.get('wiki')});
			var detail_text = 'Details';
			if (feature.get('type') == 'sledrun') detail_text += ' zur Rodelbahn';
			if (feature.get('type') == 'gasthaus') detail_text += ' zum Gasthaus';
			if (feature.get('thumb_url') === undefined) a.text(detail_text);
			else a.append(createElement('img', {src: feature.get('thumb_url'), alt: detail_text, title: detail_text}));
		}

		return popup_div;
	}


	/*
	// 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: get_sledrun_condition,
						getSymbol: function(feature) {
							var name = feature.attributes.type;
							return name;
						}
					},
					rules: [
						new OpenLayers.Rule({
							filter: filter_point_sledrun,
							symbolizer: {
								externalGraphic: img_path + '/marker_c_sledrun_${getCondition}nn.png',
								graphicWidth: 17,
								graphicHeight: 17,
								graphicXOffset: -8,
								graphicYOffset: -8,
								backgroundGraphic: img_path + '/marker_c_shadow.png',
								backgroundWidth: 23,
								backgroundHeight: 23,
								backgroundXOffset: -8,
								backgroundYOffset: -8,
							}
						}),
						new OpenLayers.Rule({
							elseFilter: true,
							symbolizer: {
								externalGraphic: img_path + '/marker_p_${getSymbol}.png',
								graphicWidth: 20,
								graphicHeight: 34,
								graphicXOffset: -10,
								graphicYOffset: -33,
							}
						})
					]
				}),
			highlight: new OpenLayers.Style({
					label: "${getTitle}",
					labelOutlineColor: "white",
					fontWeight: "bold"
				}, {
					context: {
						getCondition: get_sledrun_condition,
						getTitle: function(feature) {
							var title = '';
							if (feature.attributes.type != 'point') {
								title = feature.attributes.type;
								title = title.charAt(0).toUpperCase() + title.slice(1); // First letter uppercase
								if (feature.attributes.name !== undefined) title += ': ';
							}
							if (feature.attributes.name !== undefined) title += feature.attributes.name;
							return title;
						}
					},
					rules: [
						new OpenLayers.Rule({
							filter: filter_point_sledrun,
							symbolizer: {
								label: "${name}",
								labelYOffset: 14,
								externalGraphic: img_path + '/marker_c_sledrun_${getCondition}nh.png'
							}
						}),
						new OpenLayers.Rule({
							elseFilter: true,
							symbolizer: {
								labelYOffset: 40
							}
						})
					]
				}),
			select: new OpenLayers.Style({
					fillOpacity: 1.
				}, {
					context: {
						getCondition: get_sledrun_condition,
					},
					rules: [
						new OpenLayers.Rule({
							filter: filter_point_sledrun,
							symbolizer: {
								externalGraphic: img_path + '/marker_c_sledrun_${getCondition}nh.png',
								backgroundGraphic: false,
								graphicXOffset: -6,
								graphicYOffset: -6
							}
						}),
						new OpenLayers.Rule({
							elseFilter: true
						})
					]
				})
		}),
		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 layer_sledrun_source = new ol.source.Vector({features: features_all});
	var layer_sledrun = new ol.layer.Vector({
		source: layer_sledrun_source,
		style: style_function
	});

	var map = new ol.Map({
		target: jq_map[0],
		layers: [
			layer_map,
			layer_sledrun
		],
		overlays: [popup_overlay],
		view: new ol.View({
			center: ol.proj.fromLonLat([lon, lat]),
			zoom: zoom
		}),
		controls: ol.control.defaults({
			attributionOptions: {
				collapsible: false
			}
		}),
		interactions: ol.interaction.defaults({
			mouseWheelZoom: false
		})
	});


	var select_hover = new ol.interaction.Select({
		condition: ol.events.condition.pointerMove,
		style: style_function_selected,
	});
	map.addInteraction(select_hover);

	var select_click = new ol.interaction.Select({
		condition: ol.events.condition.click,
	});
	map.addInteraction(select_click);
	select_click.on('select', function(event) {
		if (event.selected.length > 0) {
			let feature = event.selected[0];
			let coordinates = feature.getGeometry().getCoordinates();
			let popup_dom = create_popup_dom(feature);
			$(popup_content).empty().append(popup_dom);
			popup_overlay.setPosition(coordinates);
		}
	});
}

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


$(document).ready(init_wrmaps);