package org.gcube.portlets.user.geoportaldataviewer.server.gis;

import org.gcube.application.geoportalcommon.shared.gis.BoundsMap;
import org.gcube.application.geoportalcommon.util.URLParserUtil;
import org.gcube.portlets.user.geoportaldataviewer.server.gis.MapServerRecognize.SERVERTYPE;
import org.gcube.portlets.user.geoportaldataviewer.shared.gis.LayerItem;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


/**
 * The Class URLMakers.
 *
 * @author Francesco Mangiacrapa at ISTI-CNR (francesco.mangiacrapa@isti.cnr.it)
 * 
 * Oct 29, 2020
 */
public class GisMakers {

	public static final String CQL_FILTER_PARAMETER = "CQL_FILTER";

	// MAP SERVER PIVOT
	public static final String WXS = "wxs";
	// GEOSERVER PIVOT
	public static final String WMS = "/wms";

	// OUTPUT FORMAT
	public static final String CSV = "csv";

	public static final String JSON = "json";
	
	private static String[][] a = { { "\\?", "%3F" }, { "&", "%26" }, };
	
	private static final Logger LOG = LoggerFactory.getLogger(GisMakers.class);
	
	/**
	 * The Enum COORDINATE_FORMAT.
	 *
	 * @author Francesco Mangiacrapa at ISTI-CNR (francesco.mangiacrapa@isti.cnr.it)
	 * 
	 * Oct 29, 2020
	 */
	public static enum COORDINATE_FORMAT {
		XY, YX
	};


	/**
	 * Builds the WFS feature query.
	 *
	 * @param layerItem the layer item
	 * @param mapSrsName the map srs name
	 * @param mapBBOX the map BBOX
	 * @param maxFeatures the max features
	 * @param outputFormat the output format
	 * @return the string
	 */
	public static String buildWFSFeatureQuery(LayerItem layerItem, String mapSrsName, BoundsMap mapBBOX, int maxFeatures, String outputFormat) {

		String link = layerItem.getMapServerHost();
		LOG.debug("Map server host URL: " + link);
		LOG.debug("CQL filter is: " + layerItem.getCqlFilter());
		LOG.debug("MAX FEATURES: " + maxFeatures);

		String outputformat = null;
		String boundingBox = "";

		// CASE MAP SERVER
		SERVERTYPE mapserverType = MapServerRecognize.recongnize(layerItem);
		LOG.debug("Recongnized SERVERTYPE: " + mapserverType);
		

		if (mapserverType != null) {
			if (mapserverType.equals(SERVERTYPE.MAPSERVER)) {
				LOG.debug("wms url contains wxs is a map server? no appending /wfs ");
				outputformat = MapServerRecognize.outputFormatRecognize(SERVERTYPE.MAPSERVER, outputFormat);
				boundingBox = BBOX_FORMAT(COORDINATE_FORMAT.YX, ",",mapBBOX.getLowerLeftX(),mapBBOX.getLowerLeftY(),mapBBOX.getUpperRightX(),mapBBOX.getUpperRightY()); // USE AXIS XY
				// TODO DEBUG
				LOG.debug("SERVERTYPE.MAPSERVER outputformat: " + outputformat);
				LOG.debug("SERVERTYPE.MAPSERVER srsName: " + mapSrsName);
				LOG.debug("SERVERTYPE.MAPSERVER boundingBox: " + boundingBox);
			} else {
				LOG.debug("is geoserver appending suffix /wfs if is not present");
				link += link.endsWith("wfs") ? "" : "/wfs";
				outputformat = MapServerRecognize.outputFormatRecognize(SERVERTYPE.GEOSEVER, outputFormat);
				mapSrsName = "urn:x-ogc:def:crs:"+mapSrsName;
				boundingBox = BBOX_FORMAT(COORDINATE_FORMAT.YX, ",",mapBBOX.getLowerLeftX(),mapBBOX.getLowerLeftY(),mapBBOX.getUpperRightX(),mapBBOX.getUpperRightY()); // USE AXIS XY
				// TODO DEBUG
				LOG.debug("SERVERTYPE.GEOSEVER outputformat: " + outputformat);
				LOG.debug("SERVERTYPE.GEOSEVER srsName: " + mapSrsName);
			}
		}
//
//		link += "?service=wfs&version=1.1.0" + "&REQUEST=GetFeature" + "&srsName=" + srsName + "&TYPENAME="
//				+ layerItem.getName() + (limit == 0 ? "" : "&MAXFEATURES=" + limit)
//				+ (outputformat == null ? "" : "&OUTPUTFORMAT=" + outputformat);
//		

		link += "?"+
				URLParserUtil.addParameterToQueryString(WFSGetFeature.SERVICE.getParameter(), WFSGetFeature.SERVICE.getValue(), false, true)+
				URLParserUtil.addParameterToQueryString(WFSGetFeature.VERSION.getParameter(), WFSGetFeature.VERSION.getValue(), false, true)+
				URLParserUtil.addParameterToQueryString(WFSGetFeature.REQUEST.getParameter(), WFSGetFeature.REQUEST.getValue(), false, true)+
				URLParserUtil.addParameterToQueryString(WFSGetFeature.SRSNAME.getParameter(), mapSrsName, false, true)+
				URLParserUtil.addParameterToQueryString(WFSGetFeature.TYPENAME.getParameter(), layerItem.getName(), false, true)+
				(maxFeatures == 0 ? "" : URLParserUtil.addParameterToQueryString(WFSGetFeature.MAXFEATURES.getParameter(), maxFeatures+"", false, true))+
				(outputformat == null ? "" : URLParserUtil.addParameterToQueryString(WFSGetFeature.OUTPUTFORMAT.getParameter(), outputformat, false, false));
				
		
		if (layerItem.getCqlFilter() != null && !layerItem.getCqlFilter().isEmpty()) {
			if (layerItem.getCqlFilter().contains("BBOX(the_geom")) {
				// THE BBOX IS ALREADY USED INTO CQL FILTERING, SO USING IT DIRECTLY
				link += "&" + CQL_FILTER_PARAMETER + "=" + layerItem.getCqlFilter();
			} else {
				// I NEED TO ENCODE THE BBOX INTO CQL FILTERING,
				String cqlFilterValue = "BBOX(the_geom," + boundingBox + ")" + " AND " + layerItem.getCqlFilter();

				link += "&" + CQL_FILTER_PARAMETER + "=" + cqlFilterValue;
			}

		} else {
			// NO CQL FILTERING APPLIED
			link += (boundingBox == null ? "" : "&BBOX=" + boundingBox);
		}

		LOG.info("WFS: " + link);
		return link;
	}

	/**
	 * Encode url.
	 *
	 * @param url the url
	 * @return the string
	 */
	public static String encodeUrl(String url) {
		String urlNew = url;
		for (String[] s : a) {
			urlNew = urlNew.replaceAll(s[0], s[1]);
		}
		return urlNew;
	}

	/**
	 * Decode url.
	 *
	 * @param url the url
	 * @return the string
	 */
	public static String decodeUrl(String url) {
		String urlNew = url;
		for (String[] s : a) {
			urlNew = urlNew.replaceAll(s[1], s[0]);
		}
		return urlNew;
	}

	/**
	 * Removes the last char.
	 *
	 * @param string the string
	 * @return the string
	 */
	public static String removeLastChar(String string) {

		if (string == null)
			return null;

		if (string.length() > 0)
			return string.substring(0, string.length() - 1);

		return string;
	}
	
	
	/**
	 * Format.
	 *
	 * @param format the format
	 * @param separator the separator
	 * @return the string
	 */
	public static String BBOX_FORMAT(COORDINATE_FORMAT format, String separator, double lowerLeftX, double lowerLeftY, double upperRightX, double upperRightY) {
		
		if(format==null)
			format = COORDINATE_FORMAT.XY;
		
		if(separator==null)
			separator = ",";
		
		switch (format) {
		case XY:
			return String.format("%s%s%s%s%s%s%s", 
					String.valueOf(lowerLeftX), 
					separator, 
					String.valueOf(lowerLeftY),
					separator, 
					String.valueOf(upperRightX), 
					separator, 
					String.valueOf(upperRightY)
					);
		case YX:
			return String.format("%s%s%s%s%s%s%s", 
					String.valueOf(lowerLeftY), 
					separator, 
					String.valueOf(lowerLeftX),
					separator, 
					String.valueOf(upperRightY), 
					separator, 
					String.valueOf(upperRightX)
					);
		}

		return null;
	}

}