/*-
 * #%L
 * Alfresco Remote API
 * %%
 * Copyright (C) 2005 - 2016 Alfresco Software Limited
 * %%
 * This file is part of the Alfresco software. 
 * If the software was purchased under a paid Alfresco license, the terms of 
 * the paid license agreement will prevail.  Otherwise, the software is 
 * provided under the following open source license terms:
 * 
 * Alfresco is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * Alfresco is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
 * #L%
 */
package org.alfresco.rest.api.search;

import org.alfresco.rest.api.Nodes;
import org.alfresco.rest.api.model.Node;
import org.alfresco.rest.api.search.impl.ResultMapper;
import org.alfresco.rest.api.search.impl.SearchMapper;
import org.alfresco.rest.api.search.model.SearchQuery;
import org.alfresco.rest.framework.jacksonextensions.BeanPropertiesFilter;
import org.alfresco.rest.framework.resource.parameters.CollectionWithPagingInfo;
import org.alfresco.rest.framework.resource.parameters.Paging;
import org.alfresco.rest.framework.resource.parameters.Params;
import org.alfresco.rest.framework.tools.ApiAssistant;
import org.alfresco.rest.framework.tools.RecognizedParamsExtractor;
import org.alfresco.rest.framework.tools.RequestReader;
import org.alfresco.rest.framework.tools.ResponseWriter;
import org.alfresco.rest.framework.webscripts.ResourceWebScriptHelper;
import org.alfresco.rest.framework.webscripts.WithResponse;
import org.alfresco.service.ServiceRegistry;
import org.alfresco.service.cmr.search.ResultSet;
import org.alfresco.service.cmr.search.SearchParameters;
import org.alfresco.service.cmr.search.SearchService;
import org.alfresco.util.ParameterCheck;
import org.alfresco.util.PropertyCheck;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.extensions.webscripts.AbstractWebScript;
import org.springframework.extensions.webscripts.WebScriptRequest;
import org.springframework.extensions.webscripts.WebScriptResponse;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

/**
 * An implementation of the {{baseUrl}}/{{networkId}}/public/search/versions/1/search endpoint
 *
 * @author Gethin James
 */
public class SearchApiWebscript extends AbstractWebScript implements RecognizedParamsExtractor, RequestReader, ResponseWriter,
                                                                InitializingBean
{
    private ServiceRegistry serviceRegistry;
    private SearchService searchService;
    private SearchMapper searchMapper;
    private ResultMapper resultMapper;
    protected ApiAssistant assistant;
    protected ResourceWebScriptHelper helper;

    @Override
    public void afterPropertiesSet()
    {
        PropertyCheck.mandatory(this, "serviceRegistry", serviceRegistry);
        this.searchService = serviceRegistry.getSearchService();
        ParameterCheck.mandatory("assistant", this.assistant);
        ParameterCheck.mandatory("searchMapper", this.searchMapper);
        ParameterCheck.mandatory("resultMapper", this.resultMapper);
    }

    @Override
    public void execute(WebScriptRequest webScriptRequest, WebScriptResponse webScriptResponse) throws IOException
    {

        try {
            //Turn JSON into a Java object respresentation
            SearchQuery searchQuery = extractJsonContent(webScriptRequest, assistant.getJsonHelper(), SearchQuery.class);

            //Parse the parameters
            Params params = getParams(webScriptRequest, searchQuery.getFields(), searchQuery.getInclude(), searchQuery.getPaging());

            //Turn the SearchQuery json into the Java SearchParameters object
            SearchParameters searchParams = searchMapper.toSearchParameters(params, searchQuery);

            //Call searchService
            ResultSet results = searchService.query(searchParams);

            //Turn solr results into JSON
            CollectionWithPagingInfo<Node> resultJson = resultMapper.toCollectionWithPagingInfo(params, searchQuery, results);
            //Post-process the request and pass in params, eg. params.getFilter()
            Object toRender = helper.processAdditionsToTheResponse(null, null, null, params, resultJson);

            //Write response
            setResponse(webScriptResponse, DEFAULT_SUCCESS);
            renderJsonResponse(webScriptResponse, toRender, assistant.getJsonHelper());

        } catch (Exception exception) {
            renderException(exception,webScriptResponse,assistant);
        }
    }

    /**
     * Gets the Params object, parameters come from the SearchQuery json not the request
     * @param webScriptRequest
     * @param searchQuery
     * @return Params
     */
    protected Params getParams(WebScriptRequest webScriptRequest, List<String> fields, List<String> include, Paging paging)
    {
        if (paging == null)
        {
            paging = Paging.DEFAULT;
        }
        BeanPropertiesFilter filter = null;
        if (fields != null && !fields.isEmpty())
        {
            List<String> selectList = new ArrayList<>(fields.size());
            selectList.addAll(fields);

            if (include != null &&  !include.isEmpty())
            {
                selectList.addAll(include);
            }

          filter = getFilter("", selectList);
        }

        Params.RecognizedParams recognizedParams = new Params.RecognizedParams(null, paging, filter, null, include, null, null, null, false);
        return Params.valueOf(null, recognizedParams, null, webScriptRequest);
    }

    public void setSearchMapper(SearchMapper searchMapper)
    {
        this.searchMapper = searchMapper;
    }

    public void setResultMapper(ResultMapper resultMapper)
    {
        this.resultMapper = resultMapper;
    }

    public void setAssistant(ApiAssistant assistant) {
        this.assistant = assistant;
    }

    public void setServiceRegistry(ServiceRegistry serviceRegistry) {
        this.serviceRegistry = serviceRegistry;
    }

    public void setHelper(ResourceWebScriptHelper helper)
    {
        this.helper = helper;
    }
}