/********************************************************************************
 * Copyright (c) 2015-2021 Contributors to the Eclipse Foundation
 *
 * See the NOTICE file(s) distributed with this work for additional
 * information regarding copyright ownership.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 ********************************************************************************/

package org.eclipse.mdm.businessobjects.boundary;

import static org.eclipse.mdm.businessobjects.boundary.ResourceConstants.ENTITYATTRIBUTE_NAME;
import static org.eclipse.mdm.businessobjects.boundary.ResourceConstants.REQUESTPARAM_ID;
import static org.eclipse.mdm.businessobjects.boundary.ResourceConstants.REQUESTPARAM_ID2;
import static org.eclipse.mdm.businessobjects.boundary.ResourceConstants.REQUESTPARAM_SOURCENAME;
import static org.eclipse.mdm.businessobjects.service.EntityService.L;
import static org.eclipse.mdm.businessobjects.service.EntityService.SL;
import static org.eclipse.mdm.businessobjects.service.EntityService.V;

import javax.ejb.EJB;
import javax.ws.rs.Consumes;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;

import org.eclipse.mdm.api.base.model.Environment;
import org.eclipse.mdm.api.dflt.model.ValueList;
import org.eclipse.mdm.api.dflt.model.ValueListValue;
import org.eclipse.mdm.businessobjects.entity.SearchAttribute;
import org.eclipse.mdm.businessobjects.service.EntityService;
import org.eclipse.mdm.businessobjects.utils.RequestBody;
import org.eclipse.mdm.businessobjects.utils.ServiceUtils;

import io.swagger.v3.oas.annotations.tags.Tag;
import io.vavr.collection.List;

/**
 * {@link ValueListValue} resource handling REST requests
 * 
 * @author Alexander Nehmer, science+computing AG Tuebingen (Atos SE)
 *
 */
@Tag(name = "ValueList")
@Path("/environments/{" + REQUESTPARAM_SOURCENAME + "}/valuelists/{" + REQUESTPARAM_ID + "}/values")
public class ValueListValueResource {

	@EJB
	private EntityService entityService;

	/**
	 * Returns the found {@link ValueListValue}.
	 * 
	 * @param sourceName name of the source (MDM {@link Environment} name)
	 * @param id         id of the {@link ValueListValue}
	 * @return the found {@link ValueListValue} as {@link Response}
	 */
	@GET
	@Produces(MediaType.APPLICATION_JSON)
	@Path("/{" + REQUESTPARAM_ID2 + "}")
	public Response find(@PathParam(REQUESTPARAM_SOURCENAME) String sourceName,
			@PathParam(REQUESTPARAM_ID) String valueListId, @PathParam(REQUESTPARAM_ID2) String id) {
		return entityService.find(V(sourceName), ValueListValue.class, V(id), SL(valueListId))
				.map(e -> ServiceUtils.buildEntityResponse(e, Status.OK)).get();
	}

	/**
	 * Returns the (filtered) {@link ValueListValue}s.
	 * 
	 * @param sourceName name of the source (MDM {@link Environment} name)
	 * @param filter     filter string to filter the {@link ValueListValue} result
	 * @return the (filtered) {@link ValueListValue}s as {@link Response}
	 */
	@GET
	@Produces(MediaType.APPLICATION_JSON)
	public Response findAll(@PathParam(REQUESTPARAM_SOURCENAME) String sourceName,
			@PathParam(REQUESTPARAM_ID) String valueListId, @QueryParam("filter") String filter) {

		return entityService.find(V(sourceName), ValueList.class, V(valueListId))
				.map(valueList -> List.ofAll(valueList.getValueListValues()))
				.map(e -> ServiceUtils.buildEntityResponse(e, Status.OK)).get();
	}

	/**
	 * Returns the created {@link ValueListValue}.
	 * 
	 * @param sourceName  name of the source (MDM {@link Environment} name)
	 * @param valueListId id of the {@link ValueList} to create to value for
	 * @param body        The {@link ValueListValue} to create.
	 * @return the created {@link ValueListValue} as {@link Response}.
	 */
	@POST
	@Produces(MediaType.APPLICATION_JSON)
	@Consumes(MediaType.APPLICATION_JSON)
	public Response create(@PathParam(REQUESTPARAM_SOURCENAME) String sourceName,
			@PathParam(REQUESTPARAM_ID) String valueListId, String body) {
		RequestBody requestBody = RequestBody.create(body);

		return entityService
				.create(V(sourceName), ValueListValue.class,
						L(requestBody.getStringValueSupplier(ENTITYATTRIBUTE_NAME),
								entityService.find(V(sourceName), ValueList.class, V(valueListId))))
				.map(e -> ServiceUtils.buildEntityResponse(e, Status.CREATED)).get();
	}

	/**
	 * Updates the {@link ValueListValue} with all parameters set in the given JSON
	 * body of the request.
	 * 
	 * @param sourceName name of the source (MDM {@link Environment} name)
	 * @param id         the identifier of the {@link ValueListValue} to delete.
	 * @param body       the body of the request containing the attributes to update
	 * @return the updated {@link ValueListValue}
	 */
	@PUT
	@Produces(MediaType.APPLICATION_JSON)
	@Consumes(MediaType.APPLICATION_JSON)
	@Path("/{" + REQUESTPARAM_ID2 + "}")
	public Response update(@PathParam(REQUESTPARAM_SOURCENAME) String sourceName,
			@PathParam(REQUESTPARAM_ID) String valueListId, @PathParam(REQUESTPARAM_ID2) String id, String body) {
		RequestBody requestBody = RequestBody.create(body);

		return entityService
				.update(V(sourceName), entityService.find(V(sourceName), ValueListValue.class, V(id), SL(valueListId)),
						requestBody.getValueMapSupplier())
				.map(e -> ServiceUtils.buildEntityResponse(e, Status.OK)).get();
	}

	/**
	 * Deletes and returns the deleted {@link ValueListValue}.
	 * 
	 * @param sourceName name of the source (MDM {@link Environment} name)
	 * @param id         The identifier of the {@link ValueListValue} to delete.
	 * @return the deleted {@link ValueListValue }s as {@link Response}
	 */
	@DELETE
	@Produces(MediaType.APPLICATION_JSON)
	@Path("/{" + REQUESTPARAM_ID2 + "}")
	public Response delete(@PathParam(REQUESTPARAM_SOURCENAME) String sourceName,
			@PathParam(REQUESTPARAM_ID) String valueListId, @PathParam(REQUESTPARAM_ID2) String id) {
		return entityService
				.delete(V(sourceName), entityService.find(V(sourceName), ValueListValue.class, V(id), SL(valueListId)))
				.map(e -> ServiceUtils.buildEntityResponse(e, Status.OK)).get();
	}

	/**
	 * Returns the search attributes for the {@link ValueListValue} type.
	 * 
	 * @param sourceName name of the source (MDM {@link Environment} name)
	 * @return the {@link SearchAttribute}s as {@link Response}
	 */
	@GET
	@Produces(MediaType.APPLICATION_JSON)
	@Path("/searchattributes")
	public Response getSearchAttributes(@PathParam(REQUESTPARAM_SOURCENAME) String sourceName) {
		return ServiceUtils.buildSearchAttributesResponse(V(sourceName), ValueListValue.class, entityService);
	}

	/**
	 * Returns a map of localization for the entity type and the attributes.
	 * 
	 * @param sourceName name of the source (MDM {@link Environment} name)
	 * @return the I18N as {@link Response}
	 */
	@GET
	@Produces(MediaType.APPLICATION_JSON)
	@Path("/localizations")
	@Deprecated
	public Response localize(@PathParam(REQUESTPARAM_SOURCENAME) String sourceName) {
		return ServiceUtils.buildLocalizationResponse(V(sourceName), ValueListValue.class, entityService);
	}
}