/*
 * #%L
 * HAPI FHIR - Server Framework
 * %%
 * Copyright (C) 2014 - 2023 Smile CDR, Inc.
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */
package ca.uhn.fhir.rest.server.method;

import ca.uhn.fhir.rest.annotation.RawParam;
import ca.uhn.fhir.rest.api.server.RequestDetails;
import ca.uhn.fhir.rest.param.QualifierDetails;
import ca.uhn.fhir.rest.server.exceptions.InternalErrorException;
import ca.uhn.fhir.rest.server.exceptions.InvalidRequestException;
import org.apache.commons.lang3.Validate;

import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class RawParamsParameter implements IParameter {

	private final List<IParameter> myAllMethodParameters;

	public RawParamsParameter(List<IParameter> theParameters) {
		myAllMethodParameters = theParameters;
	}

	@Override
	public Object translateQueryParametersIntoServerArgument(
			RequestDetails theRequest, BaseMethodBinding theMethodBinding)
			throws InternalErrorException, InvalidRequestException {
		HashMap<String, List<String>> retVal = null;

		for (String nextName : theRequest.getParameters().keySet()) {
			if (nextName.startsWith("_")) {
				continue;
			}

			QualifierDetails qualifiers = QualifierDetails.extractQualifiersFromParameterName(nextName);

			boolean alreadyCaptured = false;
			for (IParameter nextParameter : myAllMethodParameters) {
				if (nextParameter instanceof SearchParameter) {
					SearchParameter nextSearchParam = (SearchParameter) nextParameter;
					if (nextSearchParam.getName().equals(qualifiers.getParamName())) {
						if (qualifiers.passes(
								nextSearchParam.getQualifierWhitelist(), nextSearchParam.getQualifierBlacklist())) {
							alreadyCaptured = true;
							break;
						}
					}
				}
			}

			if (!alreadyCaptured) {
				if (retVal == null) {
					retVal = new HashMap<>();
				}
				retVal.put(nextName, Arrays.asList(theRequest.getParameters().get(nextName)));
			}
		}

		return retVal;
	}

	@Override
	public void initializeTypes(
			Method theMethod,
			Class<? extends Collection<?>> theOuterCollectionType,
			Class<? extends Collection<?>> theInnerCollectionType,
			Class<?> theParameterType) {
		Validate.isTrue(
				theParameterType.equals(Map.class),
				"Parameter with @" + RawParam.class + " must be of type Map<String, List<String>>");
	}
}
