package at.gv.egovernment.moa.id.auth.builder;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import at.gv.egovernment.moa.id.auth.AuthenticationServer;
import at.gv.egovernment.moa.id.auth.data.AuthenticationSession;
import at.gv.egovernment.moa.id.auth.exception.AuthenticationException;
import at.gv.egovernment.moa.id.auth.exception.MOAIDException;
import at.gv.egovernment.moa.id.auth.exception.WrongParametersException;
import at.gv.egovernment.moa.id.config.auth.AuthConfigurationProvider;
import at.gv.egovernment.moa.id.config.stork.STORKConfig;
import at.gv.egovernment.moa.logging.Logger;
import at.gv.egovernment.moa.util.StringUtils;

public class StartAuthenticationBuilder {

	private static StartAuthenticationBuilder instance = null;
	
	public static StartAuthenticationBuilder getInstance() {
		if (instance == null) {
			instance = new StartAuthenticationBuilder();
		}
		return instance;
	}
	
	
	public String build(AuthenticationSession moasession, HttpServletRequest req,
			HttpServletResponse resp) throws WrongParametersException, MOAIDException {
		
		if (moasession == null) {
			throw new AuthenticationException("auth.18", new Object[] { });
		}
		  
	    STORKConfig storkConfig = AuthConfigurationProvider.getInstance().getStorkConfig();
	    
	    Logger.info("Starting authentication for a citizen of country: " + (StringUtils.isEmpty(moasession.getCcc()) ? "AT" : moasession.getCcc()));    
	    // STORK or normal authentication
	    //TODO: commented because npe was thrown
	    /*if (storkConfig.isSTORKAuthentication(moasession.getCcc())) {
	    	//STORK authentication
	    	Logger.trace("Found C-PEPS configuration for citizen of country: " + moasession.getCcc());
	    	Logger.debug("Starting STORK authentication");
	    	
	    	AuthenticationServer.startSTORKAuthentication(req, resp, moasession);
	    	return "";
	    	
	    } else {*/
	    	//normal MOA-ID authentication
	    	Logger.debug("Starting normal MOA-ID authentication");
		    			    	    	
	    	String getIdentityLinkForm = AuthenticationServer.getInstance().startAuthentication(moasession, req);	   

	    	return getIdentityLinkForm;
	    //}
	}
}