package org.gcube.application.cms.sdi.engine;

import lombok.NonNull;
import lombok.extern.slf4j.Slf4j;
import org.bson.Document;
import org.gcube.application.cms.plugins.requests.BaseRequest;
import org.gcube.application.cms.sdi.faults.SDIInteractionException;
import org.gcube.application.geoportal.common.model.configuration.Index;
import org.gcube.application.geoportal.common.model.legacy.SDILayerDescriptor;
import org.gcube.application.geoportal.common.model.useCaseDescriptor.UseCaseDescriptor;
import org.gcube.application.geoportal.common.model.rest.DatabaseConnection;

import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;


@Slf4j
public class PostgisIndexer {


    public static void init() throws ClassNotFoundException {

            Class.forName("org.postgresql.Driver");
            Class.forName("org.postgis.DriverWrapper");

    };

    @NonNull
    SDIManagerWrapper manager;
    @NonNull
    UseCaseDescriptor useCaseDescriptor;

    @NonNull
    DatabaseConnection connectionParameters;

    PostgisDBManagerI dbManager=null;

    public PostgisIndexer(SDIManagerWrapper manager, UseCaseDescriptor useCaseDescriptor,
                          DatabaseConnection postgisConnection) throws SQLException {
        log.info("POSTGIS Index for {} Connecting to {} ", useCaseDescriptor.getId(),postgisConnection);
        this.connectionParameters=postgisConnection;
        dbManager=new PostgisDBManager(DriverManager.
                getConnection(connectionParameters.getUrl(),
                        connectionParameters.getUser(),
                        connectionParameters.getPwd()));
        this.manager=manager;
        this.useCaseDescriptor = useCaseDescriptor;

    }

    PostgisTable table = null;

    private String storeName = null;
    private String workspace = null;
    private SDILayerDescriptor indexLayer = null;

    private List<SDILayerDescriptor> crossReferenceableLayers= new ArrayList<>();


    public void initIndex(String indexName, List<PostgisTable.Field> fields, String workspace,String storeName) throws SQLException, SDIInteractionException {
        log.info("Check/init index for {} ", useCaseDescriptor.getId());
        table = new PostgisTable(indexName,fields, PostgisTable.GeometryType.POINT);
        log.trace("Index Postgis Table is {} ",table);
        log.debug("Create if missing..");
        // Check if table exists
        dbManager.create(table);

        log.debug("Checking/ registering index layer in GS ");
        String wmsUrl=manager.configureCentroidLayer(indexName,workspace,storeName,table,connectionParameters);



        // TODO Additional layers
        // Create layer
        // Publish cross related layers
    }


    HashMap<String,String> wmsUrls=new HashMap<>();

    private String wmsByIndex(String indexName){

    }


    public Index getIndexConfiguration(){
        Index toReturn = new Index("GIS-CENTROIDS");
        // SDI Layers



        // cross reference info


        toReturn.put("",);
        return toReturn;
    }


    public void insert(Document toInsertRecord)throws SDIInteractionException {
        log.info("Inserting {} in index {}",toInsertRecord,table.getTablename());
        try {
            PreparedStatement ps = dbManager.prepareInsertStatement(table, false, true);
            table.fillObjectsPreparedStatement(toInsertRecord, ps);
            ps.execute();
        }catch (Throwable t ){
            log.error("Unable to insert {} into {} ",toInsertRecord,table.getTablename(),t);
            throw new SDIInteractionException("Unable to insert record in postgis index "+table.getTablename(),t);
        }
    }

    public void deleteByStringValue(PostgisTable.Field field, String id) throws SDIInteractionException {
        log.info("Deleting {}={} from index {}",field.getName(), id,table.getTablename());
        try {
            dbManager.deleteByFieldValue(table,field,id);
        }catch (Throwable t ){
            log.error("Unable to delete {}={} from index {}",field.getName(), id,table.getTablename(),t);
            throw new SDIInteractionException("Unable to delete record in postgis index "+table.getTablename(),t);
        }
    }



}