package com.megatim.fdxcommons.tools.database.queries;

import com.megatim.fdxcommons.model.dataproduction.CommonDataProduction;
import com.megatim.fdxcommons.tools.database.queries.metadata.QueryCriterion;
import com.megatim.fdxcommons.tools.database.contrat.DefaultPreparedStatementProcessor;
import com.megatim.fdxcommons.tools.database.contrat.QueryMetaData;
import com.megatim.fdxcommons.tools.database.queries.metadata.QueryParam;
import com.megatim.fdxcommons.tools.database.queries.metadata.WhereQueryParameters;
import com.megatim.fdxcommons.tools.database.tables.appcolumns.DataProductionUpdateIdColumnDefinition;
import com.megatim.fdxcommons.tools.database.tables.appcolumns.DateMiseAJourColumnDefinition;
import com.megatim.fdxcommons.tools.database.tables.appcolumns.DeletedColumnDefinition;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.util.ArrayList;
import java.util.List;

/**
 *
 * @author Gabuntu
 */
public class DeleteQuery implements QueryMetaData<Void> {

    private final Connection connection;
    private final QueryCriterion queryCriterion;
    private final String tableName;
    private final CommonDataProduction dataProduction;

    public DeleteQuery(String tableName, Connection connection, QueryCriterion queryCriterion, CommonDataProduction dataProduction) {
        this.connection = connection;
        this.queryCriterion = queryCriterion;
        this.tableName = tableName;
        this.dataProduction = dataProduction;
    }

    @Override
    public Void execute() throws Exception {
        System.out.println("<----------------------------------------------------------------------------------------------------------->");
        System.out.println(deleteQuery());
        System.out.println("<----------------------------------------------------------------------------------------------------------->");

        try ( PreparedStatement statement = connection.prepareStatement(deleteQuery())) {
            connection.setAutoCommit(false);

            new DefaultPreparedStatementProcessor().process(statement, deletedParameters());
            statement.execute();
            connection.commit();

            return null;
        }
    }

    private List<QueryParam> deletedParameters() throws Exception {

        List<QueryParam> params = new ArrayList<>();

        //On ajoute les paramètres spécifiques à l'application
        params.add(new QueryParam(new DeletedColumnDefinition().name(), 1));
        params.add(new QueryParam(new DataProductionUpdateIdColumnDefinition().name(), dataProduction.getId()));
        params.add(new QueryParam(new DateMiseAJourColumnDefinition().name(), dataProduction.getDateProduction()));

        //On ajoute ensuite les paramètre de la clause WHERE
        params.addAll(new WhereQueryParameters(queryCriterion).parameters());

        return params;
    }

    private String deleteQuery() throws Exception {
        return "UPDATE " + tableName + " " + setQueryPart() + " " + new WhereQueryString(queryCriterion).query();
    }

    private String setQueryPart() throws Exception {

        List<String> columnsToUpdate = new ArrayList<>();

        //Pendant l'update on set également certaines colonnes de l'application
        columnsToUpdate.add(new DeletedColumnDefinition().name());
        columnsToUpdate.add(new DataProductionUpdateIdColumnDefinition().name());
        columnsToUpdate.add(new DateMiseAJourColumnDefinition().name());

        StringBuilder query = new StringBuilder("SET ");
        int index = 0;

        for (String column : columnsToUpdate) {
            if ((index + 1) < columnsToUpdate.size()) {
                query.append(column).append(" = ? ,");
            } else {
                query.append(column).append(" = ?");
            }
            index++;
        }
        return query.toString();
    }

}