/*
 *  ============LICENSE_START=======================================================
 *  Copyright (C) 2021 Pantheon.tech
 *  Modifications (C) 2021 Nordix Foundation
 *  Modification Copyright (C) 2021 highstreet technologies GmbH
 *  ================================================================================
 *  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.
 *
 *  SPDX-License-Identifier: Apache-2.0
 *  ============LICENSE_END=========================================================
 */

package org.onap.cps.ncmp.rest.controller;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import java.util.Collection;
import javax.validation.Valid;
import org.onap.cps.ncmp.api.NetworkCmProxyDataService;
import org.onap.cps.ncmp.rest.api.NetworkCmProxyApi;
import org.onap.cps.spi.FetchDescendantsOption;
import org.onap.cps.spi.model.DataNode;
import org.onap.cps.utils.DataMapUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;


@RestController
@RequestMapping("${rest.api.ncmp-base-path}")
public class NetworkCmProxyController implements NetworkCmProxyApi {

    private static final Gson GSON = new GsonBuilder().create();
    private static final String XPATH_ROOT = "/";

    @Autowired
    private NetworkCmProxyDataService networkCmProxyDataService;

    @Override
    public ResponseEntity<String> createNode(final String jsonData, final String cmHandle,
        final String parentNodeXpath) {
        networkCmProxyDataService.createDataNode(cmHandle, parentNodeXpath, jsonData);
        return new ResponseEntity<>(HttpStatus.CREATED);
    }

    @Override
    public ResponseEntity<Object> getNodeByCmHandleAndXpath(final String cmHandle, @Valid final String xpath,
        @Valid final Boolean includeDescendants) {
        if (XPATH_ROOT.equals(xpath)) {
            return new ResponseEntity<>(HttpStatus.NOT_IMPLEMENTED);
        }
        final FetchDescendantsOption fetchDescendantsOption = Boolean.TRUE.equals(includeDescendants)
            ? FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS : FetchDescendantsOption.OMIT_DESCENDANTS;
        final DataNode dataNode = networkCmProxyDataService.getDataNode(cmHandle, xpath, fetchDescendantsOption);
        return new ResponseEntity<>(DataMapUtils.toDataMap(dataNode), HttpStatus.OK);
    }

    @Override
    public ResponseEntity<Object> queryNodesByCmHandleAndCpsPath(final String cmHandle, @Valid final String cpsPath,
        @Valid final Boolean includeDescendants) {
        final FetchDescendantsOption fetchDescendantsOption = Boolean.TRUE.equals(includeDescendants)
            ? FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS : FetchDescendantsOption.OMIT_DESCENDANTS;
        final Collection<DataNode> dataNodes =
            networkCmProxyDataService.queryDataNodes(cmHandle, cpsPath, fetchDescendantsOption);
        return new ResponseEntity<>(GSON.toJson(dataNodes), HttpStatus.OK);
    }

    @Override
    public ResponseEntity<Object> replaceNode(@Valid final String jsonData, final String cmHandle,
        @Valid final String parentNodeXpath) {
        networkCmProxyDataService.replaceNodeTree(cmHandle, parentNodeXpath, jsonData);
        return new ResponseEntity<>(HttpStatus.OK);
    }

    @Override
    public ResponseEntity<Object> updateNodeLeaves(@Valid final String jsonData, final String cmHandle,
        @Valid final String parentNodeXpath) {
        networkCmProxyDataService.updateNodeLeaves(cmHandle, parentNodeXpath, jsonData);
        return new ResponseEntity<>(HttpStatus.OK);
    }
}