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/*
 * #%L
 * HAPI FHIR - Core Library
 * %%
 * Copyright (C) 2014 - 2024 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.context;

import ca.uhn.fhir.model.api.IDatatype;
import ca.uhn.fhir.model.api.IResource;
import ca.uhn.fhir.model.api.annotation.Child;
import ca.uhn.fhir.model.api.annotation.Description;
import ca.uhn.fhir.model.primitive.XhtmlDt;
import org.hl7.fhir.instance.model.api.IBase;
import org.hl7.fhir.instance.model.api.IBaseDatatype;
import org.hl7.fhir.instance.model.api.IBaseReference;

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
import java.util.Map;

public class RuntimeChildAny extends RuntimeChildChoiceDefinition {

	public RuntimeChildAny(
			Field theField, String theElementName, Child theChildAnnotation, Description theDescriptionAnnotation) {
		super(theField, theElementName, theChildAnnotation, theDescriptionAnnotation);
	}

	@Override
	void sealAndInitialize(
			FhirContext theContext,
			Map, BaseRuntimeElementDefinition> theClassToElementDefinitions) {
		List> choiceTypes = new ArrayList<>();
		List> specializationChoiceTypes = new ArrayList<>();

		for (Class next : theClassToElementDefinitions.keySet()) {
			if (next.equals(XhtmlDt.class)) {
				continue;
			}

			boolean isSpecialization = false;
			BaseRuntimeElementDefinition nextDef = theClassToElementDefinitions.get(next);
			if (nextDef instanceof IRuntimeDatatypeDefinition) {
				if (((IRuntimeDatatypeDefinition) nextDef).isSpecialization()) {
					/*
					 * Things like BoundCodeDt shoudn't be considered as valid options for an "any" choice, since
					 * we'll already have CodeDt as an option
					 */
					isSpecialization = true;
				}
			}

			if (IResource.class.isAssignableFrom(next)
					|| IDatatype.class.isAssignableFrom(next)
					|| IBaseDatatype.class.isAssignableFrom(next)
					|| IBaseReference.class.isAssignableFrom(next)) {
				if (isSpecialization) {
					specializationChoiceTypes.add(next);
				} else {
					choiceTypes.add(next);
				}
			}
		}

		choiceTypes.sort(new ResourceTypeNameComparator());
		specializationChoiceTypes.sort(new ResourceTypeNameComparator());

		setChoiceTypes(choiceTypes, specializationChoiceTypes);

		super.sealAndInitialize(theContext, theClassToElementDefinitions);
	}

	private static class ResourceTypeNameComparator implements Comparator> {
		@Override
		public int compare(Class theO1, Class theO2) {
			boolean o1res = IResource.class.isAssignableFrom(theO1);
			boolean o2res = IResource.class.isAssignableFrom(theO2);
			if (o1res && o2res) {
				return theO1.getSimpleName().compareTo(theO2.getSimpleName());
			} else if (o1res) {
				return -1;
			} else if (!o2res) {
				return 0;
			} else {
				return 1;
			}
		}
	}
}