package org.gcube.spatial.data.sdi.rest;

import java.net.MalformedURLException;
import java.net.URL;
import java.util.List;

import javax.inject.Inject;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;

import org.gcube.spatial.data.sdi.engine.SDIManager;
import org.gcube.spatial.data.sdi.model.ServiceConstants;
import org.gcube.spatial.data.sdi.model.credentials.Credentials;
import org.gcube.spatial.data.sdi.model.service.GeoServerConfiguration;

import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.jaxrs.annotation.JacksonFeatures;

import io.swagger.annotations.Api;
import lombok.extern.slf4j.Slf4j;

@Path(ServiceConstants.GeoServer.INTERFACE)
@Api(value=ServiceConstants.GeoServer.INTERFACE)
@Slf4j
public class GeoServer {

	private final static String HOST_PATH_PARAM="host";
	
	
	@Inject
	private SDIManager sdi;
	
	@GET
	@Path("configuration/{"+HOST_PATH_PARAM+"}")
	@Produces(MediaType.APPLICATION_JSON)
	@JacksonFeatures(serializationEnable =  { SerializationFeature.INDENT_OUTPUT })
	public GeoServerConfiguration getInstanceConfiguration(@PathParam(HOST_PATH_PARAM) String host){
		try{
		log.trace("Serving credentials for host {} ",host);
		host=getHost(host);		
		List<GeoServerConfiguration> geoservers=sdi.getContextConfiguration().getGeoserverClusterConfiguration().getAvailableInstances();
		log.trace("Got {} geoservers in current scope ",geoservers.size());
		for(GeoServerConfiguration config : geoservers){
			String configHost=getHost(config.getBaseEndpoint());
			if(configHost.equals(host))
				return config;
		}
		throw new WebApplicationException("Host "+host+" not found in context");
		}catch(WebApplicationException e){
			throw e;
		}catch(Exception e){
			throw new WebApplicationException("Unable to serve request", e);
		}
	}
	
	
	@GET
	@Path("credentials/{"+HOST_PATH_PARAM+"}")
	@Produces(MediaType.APPLICATION_JSON)
	@JacksonFeatures(serializationEnable =  { SerializationFeature.INDENT_OUTPUT })
	public Credentials getInstanceCredentials(@PathParam(HOST_PATH_PARAM) String host){
		try{
		log.trace("Serving credentials for host {} ",host);
		host=getHost(host);		
		List<GeoServerConfiguration> geoservers=sdi.getContextConfiguration().getGeoserverClusterConfiguration().getAvailableInstances();
		log.trace("Got {} geoservers in current scope ",geoservers.size());
		for(GeoServerConfiguration config : geoservers){
			String configHost=getHost(config.getBaseEndpoint());
			if(configHost.equals(host))
				return config.getAccessibleCredentials().get(0);
		}
		throw new WebApplicationException("Host "+host+" not found in context");
		}catch(WebApplicationException e){
			throw e;
		}catch(Exception e){
			throw new WebApplicationException("Unable to serve request", e);
		}
	}
	
	
	private static final String getHost(String endpoint) throws MalformedURLException{
		log.debug("Get host from endpoint {} ",endpoint);
		if(endpoint.startsWith("http")){
			log.debug("Endpoint seems url..");
			return new URL(endpoint).getHost();
		}
		return endpoint;
	}
}