package org.gcube.common.authorization.utils.secret;

import java.util.HashMap;
import java.util.Map;
import java.util.regex.Pattern;

import org.gcube.common.authorization.client.Constants;
import org.gcube.common.authorization.library.AuthorizationEntry;
import org.gcube.common.authorization.library.exception.AuthorizationException;
import org.gcube.common.authorization.library.provider.AuthorizationProvider;
import org.gcube.common.authorization.library.provider.ClientInfo;
import org.gcube.common.authorization.library.provider.SecurityTokenProvider;
import org.gcube.common.authorization.library.utils.Caller;
import org.gcube.common.scope.api.ScopeProvider;
import org.gcube.common.scope.impl.ScopeBean;

/**
 * @author Luca Frosini (ISTI - CNR)
 */
public class GCubeSecret extends Secret {

	public static final String GCUBE_TOKEN_REGEX = "^([a-fA-F0-9]{8}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{12}-[a-fA-F0-9]{8,9}){1}$";
	
	@Override
	protected void check(String token) throws AuthorizationException {
		super.check(token);
		if(!Pattern.matches(GCubeSecret.GCUBE_TOKEN_REGEX, token)) {
			throw new AuthorizationException("The GUCBE token must comply with the regex " + GCUBE_TOKEN_REGEX);
		}
	}
	
	public GCubeSecret(String token) {
		super(20, token);
	}

	@Override
	public void set() throws Exception {
		SecurityTokenProvider.instance.set(token);
		
		AuthorizationEntry authorizationEntry = Constants.authorizationService().get(token);
		ClientInfo clientInfo = authorizationEntry.getClientInfo();
		String qualifier = authorizationEntry.getQualifier();
		Caller caller = new Caller(clientInfo, qualifier);
		AuthorizationProvider.instance.set(caller);
		
		ScopeBean scopeBean = new ScopeBean(getContext());
		ScopeProvider.instance.set(scopeBean.toString());
	}
	
	protected ClientInfo getClientInfo() throws Exception {
		return Constants.authorizationService().get(token).getClientInfo();
	}
	
	@Override
	public String getContext() throws Exception {
		return Constants.authorizationService().get(token).getContext();
	}
	
	@Override
	public String getUsername() throws Exception {
		return getClientInfo().getId();
	}
	
	
	@Override
	public Map<String, String> getHTTPAuthorizationHeaders() {
		Map<String, String> authorizationHeaders = new HashMap<>();
		authorizationHeaders.put(org.gcube.common.authorization.client.Constants.TOKEN_HEADER_ENTRY, token);
		return authorizationHeaders;
	}

}