/******************************************************************************
 Copyright 2011 Olaf Hannemann
 
 This file 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 file 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 file.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************

 ******************************************************************************
 This file implements the nautical route service to the OpenSeaMap map.
 Version 0.1.1  15.10.2011
 ******************************************************************************/

var defaultStyle = {strokeColor: "blue", strokeOpacity: "0.8", strokeWidth: 3, fillColor: "blue", pointRadius: 3, cursor: "pointer"};
var style = OpenLayers.Util.applyDefaults(defaultStyle, OpenLayers.Feature.Vector.style["default"]);
var routeStyle = new OpenLayers.StyleMap({
	'default': style,
	'select': {strokeColor: "red", fillColor: "red"}
});

var editPanel;
var routeDraw;
var routeEdit;

var routeTrack;
var routeObject;

var style_edit = {
	strokeColor: "#CD3333",
	strokeWidth: 3,
	pointRadius: 4
};
			
function NauticalRoute_initControls() {
	editPanel = new OpenLayers.Control.Panel();
	routeDraw = new OpenLayers.Control.DrawFeature(layer_nautical_route, OpenLayers.Handler.Path, {title: 'Draw line'});
	routeEdit = new OpenLayers.Control.ModifyFeature(layer_nautical_route, {title: 'Edit feature'}),
	editPanel.addControls([routeDraw, routeEdit]);
	editPanel.defaultControl = routeDraw;
	map.addControl(editPanel);
	routeEdit.standalone = true;
}

function NauticalRoute_startEditMode() {
	NauticalRoute_initControls();
}

function NauticalRoute_stopEditMode() {
	routeDraw.deactivate();
	routeEdit.deactivate();
	layer_nautical_route.removeAllFeatures();
}

function NauticalRoute_addMode() {
	routeDraw.activate();
	routeEdit.deactivate();
}

function NauticalRoute_editMode() {
	routeDraw.deactivate();
	routeEdit.activate();
	//layer_nautical_route.style = style_green;
}

function NauticalRoute_DownloadTrack() {
	var format = document.getElementById("routeFormat").value;
	var mimetype, filename;

	switch (format) {
		case 'CSV':
			mimetype = 'text/csv';
			filename = 'route.csv';
			content = NauticalRoute_getRouteCsv(routeTrack);
			break;
		case 'KML':
			mimetype = 'application/vnd.google-earth.kml+xml';
			filename = 'route.kml';
			content = NauticalRoute_getRouteKml(routeTrack);
			break;
		case 'GPX':
			mimetype = 'application/gpx+xml';
			filename = 'route.gpx';
			content = NauticalRoute_getRouteGpx(routeObject);
			break;
		case 'GML':
			mimetype = 'application/gml+xml';
			filename = 'route.gml';
			content = NauticalRoute_getRouteGml(routeObject);
			break;
	}
	form = document.createElement('form');
	form.id = this.id + '_export_form';
	form.method = 'post';
	form.action = './api/export.php';
	document.getElementById('actionDialog').appendChild(form);
	div = document.createElement('div');
	div.className = this.displayClass + "Control";
	form.appendChild(div);
	input = document.createElement('input');
	input.id = this.id + '_export_input_mimetype';
	input.name = 'mimetype';
	input.type = 'hidden';
	div.appendChild(input);
	input = document.createElement('input');
	input.id = this.id + '_export_input_filename';
	input.name = 'filename';
	input.type = 'hidden';
	div.appendChild(input);
	input = document.createElement('input');
	input.id = this.id + '_export_input_content';
	input.name = 'content';
	input.type = 'hidden';
	div.appendChild(input);
	$(this.id + '_export_input_mimetype').value = mimetype;
	$(this.id + '_export_input_filename').value = filename;
	$(this.id + '_export_input_content').value = content;
	$(this.id + '_export_form').submit();
}

function NauticalRoute_routeAdded(event) {
	routeObject = event.object.features[0];

	routeTrack = routeObject.geometry.getVertices();
	routeDraw.deactivate();
	routeEdit.activate();
	NauticalRoute_getPoints(routeTrack);
	// Select element for editing
	routeEdit.selectControl.select(routeObject);
	document.getElementById('buttonRouteDownloadTrack').disabled=false;
}

function NauticalRoute_routeModified(event) {
	var routeObject = event.object.features[0];

	routeTrack = routeObject.geometry.getVertices();
	NauticalRoute_getPoints(routeTrack);
}

function NauticalRoute_getPoints(points) {
	var htmlText = "<br/><table>";
	var latA, latB, lonA, lonB, distance, bearing;
	var totalDistance = 0;
	htmlText += "<tr bgcolor=\"#CCCCCC\"><td width=\"20\" align=\"center\"></td><td width=\"60\" align=\"center\">" + tableTextNauticalRouteCourse + "</td><td width=\"70\" align=\"center\">" + tableTextNauticalRouteDistance + "</td><td width=\"200\" align=\"center\">" + tableTextNauticalRouteCoordinate + "</td></tr>"
	document.getElementById("routeStart").innerHTML = lat2DegreeMinute(y2lat(points[0].y)) + " - " + lon2DegreeMinute(x2lon(points[0].x));
	for(i = 0; i < points.length - 1; i++) {
		latA = y2lat(points[i].y);
		lonA = x2lon(points[i].x);
		latB = y2lat(points[i + 1].y);
		lonB = x2lon(points[i + 1].x);
		distance = getDistance(latA, latB, lonA, lonB).toFixed(2);
		bearing = getBearing(latA, latB, lonA, lonB).toFixed(2);
		totalDistance += parseFloat(distance);
		htmlText += "<tr><td width=\"20\" align=\"right\">" + parseInt(i+1) + ". </td>";
		htmlText += "<td width=\"60\" align=\"right\">" + bearing + "°</td>";
		htmlText += "<td width=\"70\" align=\"right\">" + distance + "nm</td>";
		htmlText += "<td width=\"200\" align=\"right\">" + lat2DegreeMinute(latB) + " - " + lon2DegreeMinute(lonB) + "</td></tr>";
	}
	htmlText += "</table>"
	document.getElementById("routeEnd").innerHTML = lat2DegreeMinute(latB) + " - " + lon2DegreeMinute(lonB);
	document.getElementById("routeDistance").innerHTML = totalDistance.toFixed(2) + "nm";
	document.getElementById("routePoints").innerHTML = htmlText;
}

function NauticalRoute_getRouteCsv(points) {
	var buffText = ";" + tableTextNauticalRouteCourse + ";" + tableTextNauticalRouteDistance + ";" + tableTextNauticalRouteCoordinate + "\n";
	var latA, latB, lonA, lonB, distance, bearing;
	var totalDistance = 0;

	for(i = 0; i < points.length - 1; i++) {
		latA = y2lat(points[i].y);
		lonA = x2lon(points[i].x);
		latB = y2lat(points[i + 1].y);
		lonB = x2lon(points[i + 1].x);
		distance = getDistance(latA, latB, lonA, lonB).toFixed(2);
		bearing = getBearing(latA, latB, lonA, lonB).toFixed(2);
		totalDistance += parseFloat(distance);
		buffText += parseInt(i+1)+ ";" + bearing + "°;" + distance + "nm;\"" + lat2DegreeMinute(latB) + " - " + lon2DegreeMinute(lonB) + "\"\n";
	}

	return convert2Text(buffText);
}

function NauticalRoute_getRouteKml(points) {
	var latA, lonA;
	var buffText = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<kml xmlns=\"http://earth.google.com/kml/2.0\">\n";
	buffText += "<Folder>\n<name>OpenSeaMap Route</name>\n<description>test</description>";
	buffText += "<Placemark>\n<name>OpenSeaMap</name>\n<description>No description available</description>";
	buffText += "<LineString>\n<coordinates>\n";
	for(i = 0; i < points.length; i++) {
		latA = y2lat(points[i].y);
		lonA = x2lon(points[i].x);
		buffText += lonA + "," + latA + " ";
	}
	buffText += "\n</coordinates>\n</LineString>\n</Placemark>\n</Folder>\n</kml>";
	
	return buffText;
}

function NauticalRoute_getRouteGpx(feature) {
	var parser = new OpenLayers.Format.GPX({
		internalProjection: map.projection,
		externalProjection: proj4326
	});
	
	return parser.write(feature);
}

function NauticalRoute_getRouteGml(feature) {
	var parser = new OpenLayers.Format.GML.v2({
		internalProjection: map.projection,
		externalProjection: proj4326
	});
	
	return parser.write(feature);
}