/*
 * #%L
 * HAPI FHIR JPA Server
 * %%
 * 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.jpa.provider;

import ca.uhn.fhir.jpa.api.dao.IFhirSystemDao;
import ca.uhn.fhir.jpa.model.util.JpaConstants;
import ca.uhn.fhir.model.api.annotation.Description;
import ca.uhn.fhir.rest.annotation.Operation;
import ca.uhn.fhir.rest.annotation.OperationParam;
import ca.uhn.fhir.rest.annotation.Transaction;
import ca.uhn.fhir.rest.annotation.TransactionParam;
import ca.uhn.fhir.rest.api.server.RequestDetails;
import ca.uhn.fhir.rest.server.provider.ProviderConstants;
import ca.uhn.fhir.rest.server.servlet.ServletRequestDetails;
import ca.uhn.fhir.util.ParametersUtil;
import org.hl7.fhir.instance.model.api.IBaseBundle;
import org.hl7.fhir.instance.model.api.IBaseParameters;
import org.hl7.fhir.instance.model.api.IBaseResource;
import org.hl7.fhir.instance.model.api.IPrimitiveType;

import java.util.Collections;
import java.util.Map;
import java.util.TreeMap;

import static org.apache.commons.lang3.ObjectUtils.defaultIfNull;
import static org.apache.commons.lang3.StringUtils.isNotBlank;

public final class JpaSystemProvider<T, MT> extends BaseJpaSystemProvider<T, MT> {

	@Description(
			"Marks all currently existing resources of a given type, or all resources of all types, for reindexing.")
	@Operation(
			name = MARK_ALL_RESOURCES_FOR_REINDEXING,
			idempotent = false,
			returnParameters = {@OperationParam(name = "status")})
	/**
	 * @deprecated
	 * @see ReindexProvider#Reindex(List, IPrimitiveType, RequestDetails)
	 */
	@Deprecated
	public IBaseResource markAllResourcesForReindexing(
			@OperationParam(name = "type", min = 0, max = 1, typeName = "code") IPrimitiveType<String> theType) {

		if (theType != null && isNotBlank(theType.getValueAsString())) {
			getResourceReindexingSvc().markAllResourcesForReindexing(theType.getValueAsString());
		} else {
			getResourceReindexingSvc().markAllResourcesForReindexing();
		}

		IBaseParameters retVal = ParametersUtil.newInstance(getContext());

		IPrimitiveType<?> string = ParametersUtil.createString(getContext(), "Marked resources");
		ParametersUtil.addParameterToParameters(getContext(), retVal, "status", string);

		return retVal;
	}

	@Description("Forces a single pass of the resource reindexing processor")
	@Operation(
			name = PERFORM_REINDEXING_PASS,
			idempotent = false,
			returnParameters = {@OperationParam(name = "status")})
	/**
	 * @deprecated
	 * @see ReindexProvider#Reindex(List, IPrimitiveType, RequestDetails)
	 */
	@Deprecated
	public IBaseResource performReindexingPass() {
		Integer count = getResourceReindexingSvc().runReindexingPass();

		IBaseParameters retVal = ParametersUtil.newInstance(getContext());

		IPrimitiveType<?> string;
		if (count == null) {
			string = ParametersUtil.createString(getContext(), "Index pass already proceeding");
		} else {
			string = ParametersUtil.createString(getContext(), "Indexed " + count + " resources");
		}
		ParametersUtil.addParameterToParameters(getContext(), retVal, "status", string);

		return retVal;
	}

	@Operation(name = JpaConstants.OPERATION_GET_RESOURCE_COUNTS, idempotent = true)
	@Description(
			shortDefinition =
					"Provides the number of resources currently stored on the server, broken down by resource type")
	public IBaseParameters getResourceCounts() {
		IBaseParameters retVal = ParametersUtil.newInstance(getContext());

		Map<String, Long> counts = getDao().getResourceCountsFromCache();
		counts = defaultIfNull(counts, Collections.emptyMap());
		counts = new TreeMap<>(counts);
		for (Map.Entry<String, Long> nextEntry : counts.entrySet()) {
			ParametersUtil.addParameterToParametersInteger(
					getContext(),
					retVal,
					nextEntry.getKey(),
					nextEntry.getValue().intValue());
		}

		return retVal;
	}

	@Operation(
			name = ProviderConstants.OPERATION_META,
			idempotent = true,
			returnParameters = {@OperationParam(name = "return", typeName = "Meta")})
	public IBaseParameters meta(RequestDetails theRequestDetails) {
		IBaseParameters retVal = ParametersUtil.newInstance(getContext());
		ParametersUtil.addParameterToParameters(
				getContext(), retVal, "return", getDao().metaGetOperation(theRequestDetails));
		return retVal;
	}

	@SuppressWarnings("unchecked")
	@Transaction
	public IBaseBundle transaction(RequestDetails theRequestDetails, @TransactionParam IBaseBundle theResources) {
		startRequest(((ServletRequestDetails) theRequestDetails).getServletRequest());
		try {
			IFhirSystemDao<T, MT> dao = getDao();
			return (IBaseBundle) dao.transaction(theRequestDetails, (T) theResources);
		} finally {
			endRequest(((ServletRequestDetails) theRequestDetails).getServletRequest());
		}
	}
}
