/**
 * A general helper function for creating html elements. <div> as default
 * element type
 * 
 * @author Esa 2008 used for infowindows and sidebar
 */
function createElem(opt_className, opt_html, opt_tagName) {
	var tag = opt_tagName || "div";
	var elem = document.createElement(tag);
	if (opt_html)
		elem.innerHTML = opt_html;
	if (opt_className)
		elem.className = opt_className;
	return elem;
}

/**
 * sidebar with categories
 * 
 * @author Esa 2008
 */
function SideBar(block_element, opt_options) {
	var opts = opt_options || {};
	this.division = createElem("sidebar-contents");
	block_element.appendChild(this.division);
	this.show = function() {
		this.division.style.display = "block"
	};
	this.hide = function() {
		this.division.style.display = "none"
	};
	this.cats = [];

	this.addEntry = function(point, opt_options) {
		var opts = opt_options || {};
		var iLabel = opts.iLabel || 2;
		var label = createElem("sidebar-entry", point.textArray[iLabel], "a");
		with (label) {
			href = "#";
			style.display = "block";
			onclick = function() {
				GEvent.trigger(point.marker, 'click');
				return false
			};// x-browser
			onfocus = function() {
				GEvent.trigger(point.marker, 'click');
				return false
			};
		}
		;
		this.division.appendChild(label);
		GEvent.addListener(point.marker, 'click', function() {
			label.focus();
			return false
		});
	}
	this.clear = function() {
		while (this.division.firstChild) {
			this.division.removeChild(this.division.firstChild);
		}
	}
}

/**
 * category to a sidebar
 * 
 * @author Esa 2008
 */
function BarCategory(sideBar, catName, opt_options) {
	var me = this;
	var opts = opt_options || {};
	me.division = createElem("sidebar-cat");
	var cssClasses = "sidebar-cat-header cat-header-" + catName;
	var cat = createElem(cssClasses);
	me.pin = createElem("sidebar-cat-image", null, "img");
	me.pin.src = opts.icon.image;
	cat.appendChild(me.pin);
	var check = createElem("sidebar-cat-check", null, "input");
	me.header = cat;
	check.type = "checkbox";
	check.checked = opts.checked || false;
	check.setAttribute("id", "chkbox-" + catName);
	cat.appendChild(check);
	var checkLabel = createElem("sidebar-cat-label", catName, "label");
	checkLabel.setAttribute("for", "chkbox-" + catName);
	cat.appendChild(checkLabel);
	me.show = function() {
		me.division.style.display = "block";
		me.pin.style.visibility = "visible";
	}
	me.hide = function() {
		me.division.style.display = "none";
		me.pin.style.visibility = "hidden";
	}
	me.hilight = function() {
		me.header.className = cssClasses + "  hilight-cat-header"
	};
	me.lolight = function() {
		me.header.className = cssClasses
	};
	sideBar.division.appendChild(cat);
	sideBar.division.appendChild(me.division);
	sideBar.cats[catName] = me;
	me.markers = [];
	me.showMarkers = function() {
		for ( var i = 0; i < me.markers.length; i++) {
			me.markers[i].show();
		}
	}
	me.hideMarkers = function() {
		for ( var i = 0; i < me.markers.length; i++) {
			me.markers[i].hide();
			me.markers[i].closeInfoWindow();
		}
	}
	function update() {
		if (check.checked) {
			me.show();
			me.showMarkers();
			me.hilight();
		} else {
			me.hide();
			me.hideMarkers();
			me.lolight();
		}
	}
	;
	check.onclick = update;
	me.update = update;
	me.check = check;

	me.addEntry = function(point, opt_options) {
		var opts = opt_options || {};
		me.markers.push(point.marker);
		var iLabel = opts.iLabel || 2;
		var label = createElem("sidebar-entry", point.textArray[iLabel], "a");
		label.href = "#";
		label.style.display = "block";
		label.onclick = function() {
			GEvent.trigger(point.marker, 'click');
			return false
		};// x-browser
		label.onfocus = function() {
			GEvent.trigger(point.marker, 'click');
			return false
		};
		me.division.appendChild(label);
		GEvent.addListener(point.marker, 'click', function() {
			label.focus();
			return false
		});
	}
	me.clear = function() {
		while (me.division.firstChild) {
			me.division.removeChild(me.division.firstChild);
		}
	}
}

/**
 * Marker icon
 */
function tinyImage(opt_color, opt_preload) {
	var color = opt_color || "red";
	var src_ = "http://labs.google.com/ridefinder/images/mm_20_" + color
			+ ".png";
	if (opt_preload) {
		var preImage = new Image();
		preImage.src = src_;
	}
	return src_;
}
function tinyIcon(opt_color) {
	var tiny = new GIcon();
	tiny.image = tinyImage(opt_color);
	tiny.shadow = "http://labs.google.com/ridefinder/images/mm_20_shadow.png";
	tiny.iconSize = new GSize(12, 20);
	tiny.shadowSize = new GSize(22, 20);
	tiny.iconAnchor = new GPoint(6, 20);
	tiny.infoWindowAnchor = new GPoint(5, 1);
	tiny.imageMap = [ 4, 0, 0, 4, 0, 7, 3, 11, 4, 19, 7, 19, 8, 11, 11, 7, 11,
			4, 7, 0 ];
	tiny.transparent = "tiny_transparent.png";
	return tiny;
}
// Preload loop
// Electronics freaks know the numbering scheme
var icons = [ "black", "brown", "red", "orange", "yellow", "green", "blue",
		"purple", "gray", "white" ];
for ( var color in icons) {
	tinyImage(icons[color], true);
}

/**
 * GMap2.showBounds() method. Fit bounds to viewport with paddings. @ author Esa
 * 2008 @ param bounds_ GLatLngBounds() @ param opt_options Optional options
 *      object {top, right, bottom, left, save}
 */
GMap2.prototype.showBounds = function(bounds_, opt_options) {
	var opts = opt_options || {};
	opts.top = opt_options.top * 1 || 0;
	opts.left = opt_options.left * 1 || 0;
	opts.bottom = opt_options.bottom * 1 || 0;
	opts.right = opt_options.right * 1 || 0;
	opts.save = opt_options.save || true;
	opts.disableSetCenter = opt_options.disableSetCenter || false;
	var ty = this.getCurrentMapType();
	var port = this.getSize();
	if (!opts.disableSetCenter) {
		var virtualPort = new GSize(port.width - opts.left - opts.right,
				port.height - opts.top - opts.bottom);
		this.setZoom(ty.getBoundsZoomLevel(bounds_, virtualPort));
		var xOffs = (opts.left - opts.right) / 2;
		var yOffs = (opts.top - opts.bottom) / 2;
		var bPxCenter = this.fromLatLngToDivPixel(bounds_.getCenter());
		var newCenter = this.fromDivPixelToLatLng(new GPoint(bPxCenter.x
				- xOffs, bPxCenter.y - yOffs));
		this.setCenter(newCenter);
		if (opts.save)
			this.savePosition();
	}
	var portBounds = new GLatLngBounds();
	portBounds.extend(this.fromContainerPixelToLatLng(new GPoint(opts.left,
			port.height - opts.bottom)));
	portBounds.extend(this.fromContainerPixelToLatLng(new GPoint(port.width
			- opts.right, opts.top)));
	return portBounds;
}

/**
 * Map
 */
_mPreferMetric = true; // to make size sure for IE too
var map = new GMap2(document.getElementById("map"), {
	size :new GSize(480, 400)
});
map.setCenter(new GLatLng(0, 0), 9);
map.addControl(new GLargeMapControl());
map.addControl(new GMapTypeControl());
map.addControl(new GScaleControl());
map.openInfoWindowHtml(map.getCenter(), "Nice to see you.");
map.closeInfoWindow(); // preloading infowindow

/**
 * parseCsv()
 * 
 * @return an array of GLatLng() objects
 * @param opt_options
 *            object {lat, lng} integers defining the csv cells of coordinates
 *            (default: {lat:1, lng:0})
 * @author Esa 2008
 */
String.prototype.parseCsv = function(opt_options) {
	var results = [];
	var opts = opt_options || {};
	var iLat, iLng;
	isNaN(opts.lat) ? iLat = 1 : iLat = opts.lat; // defaults
	isNaN(opts.lng) ? iLng = 0 : iLng = opts.lng; // fixed 2009
	var lines = this.split("\n");
	for ( var i = 0; i < lines.length; i++) {
		var blocks = lines[i].split('"');
		// finding commas inside quotes. Replace them with '::::'
		for ( var j = 0; j < blocks.length; j++) {
			if (j % 2) {
				blocks[j] = blocks[j].replace(/,/g, '::::');
			}
		} // @author Esa 2008, keep this note.
		lines[i] = blocks.join("");
		var lineArray = lines[i].split(",");
		var lat = parseFloat(lineArray[iLat]);
		var lng = parseFloat(lineArray[iLng]);
		var point = new GLatLng(lat, lng);
		// after splitting by commas, we put hidden ones back
		for ( var cell in lineArray) {
			lineArray[cell] = lineArray[cell].replace(/::::/g, ',');
		} // corrupted line step-over
		if (!isNaN(lat + lng)) {
			point.textArray = lineArray;
			results.push(point);
		}
	}
	return results;
}

/**
 * Create the markers, with infowindow. Create sidebar categories and entries.
 */

var bounds = new GLatLngBounds();

GMap2.prototype.populate = function(points, options) {
	var opts = options || {};
	var noCat = true;
	if (opts.cat || opts.iCat)
		noCat = false;
	var catName = opts.cat || "";
	var bar = opts.sidebar;
	var myCat;
	var newCats = [];
	for ( var i = 0; i < points.length; i++) {
		if (opts.iCat) { // category from file contents
			catName = points[i].textArray[opts.iCat];
		}
		var theIcon = opts.icon || CAT_ICONS[catName]
				|| CAT_ICONS["DEFAULT_ICON"];
		if (!bar.cats[catName] && !noCat) { // create a category if not found
			myCat = new BarCategory(bar, catName, {
				icon :theIcon
			});
			newCats.push(myCat);
		}
		var iLabel = opts.iLabel || 2;
		var label = points[i].textArray[iLabel];
		points[i].marker = new GMarker(points[i], {
			title :label,
			icon :theIcon
		});
		this.addOverlay(points[i].marker);
		bounds.extend(points[i]); // this must be considered
		createInfoWindow(points[i], opts);
		if (noCat) {
			bar.addEntry(points[i], opts);
		} else {
			myCat.addEntry(points[i], opts);
		}
	}
	myCat.check.checked = opts.checked || false;
	myCat.update();
	for ( var i = 0; i < newCats.length; i++) {
		newCats[i].check.checked = opts.checked || false;
		newCats[i].update();
	}
	var paddings = {
		top :30,
		right :10,
		bottom :10,
		left :50
	};
	this.showBounds(bounds, paddings);
}

/**
 * create infowindow
 */
function createInfoWindow(point, opt_options) {
	var opts = opt_options || {};
	var start = opts.iLabel || 2;
	var iwNode = createElem("info-window");
	var iwRows = [];
	for ( var i = start; i < point.textArray.length; i++) {
		var row = createElem("iw-cell-" + i, point.textArray[i]);
		iwRows.push(row);
		iwNode.appendChild(row);
	}
	// var directions = createElem("iw-directions", "Directions", "a");
	// directions.href = "http://maps.google.com/maps?saddr=&daddr="
	// + point.toUrlValue();
	// directions.target = "_blank";
	// iwNode.appendChild(directions); // directions added 2009
	iwRows[0].className += " iw-header";
	point.marker.bindInfoWindow(iwNode, {
		maxWidth :300
	});
}

/**
 * This function triggers the downloading and parsing of a selected text file
 * marker, sidebar and infowindow data is extracted from the file
 */

var myBar = new SideBar(document.getElementById("sidebar"));

function ajaxLoad(textFile, opt_options) {
	var opts = opt_options || {};
	opts.sidebar = myBar;
	var process = function(material) {
		var entries = material.parseCsv(opts); // fixed 2009
		map.populate(entries, opts);
	}
	GDownloadUrl(textFile, process);
}

var CAT_ICONS = [];
CAT_ICONS["DEFAULT_ICON"] = tinyIcon("green");
CAT_ICONS["Main attractions"] = tinyIcon("red");
CAT_ICONS["Hotels"] = tinyIcon("blue");

window.onload = function() {
	ajaxLoad("fileadmin/files/maps/main.txt", {
		cat :"Main attractions",
		checked :true,
		iLabel :2
	});
	ajaxLoad("fileadmin/files/maps/hotels.txt",{cat:"Hotels"});
	// ajaxLoad("mcdonalds.txt",{cat:"McDonald's"});
	// ajaxLoad("finlandtowns.txt",{cat:"Towns"});
}