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

import com.megatim.fdxcommons.tools.database.contrat.DefaultPreparedStatementProcessor;
import com.megatim.fdxcommons.tools.database.contrat.QueryMetaData;
import com.megatim.fdxcommons.tools.database.queries.metadata.QueryCriterion;
import com.megatim.fdxcommons.tools.database.queries.metadata.WhereQueryParameters;

import java.sql.Connection;
import java.sql.PreparedStatement;

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

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

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

    @Override
    public Void execute() throws Exception {

        System.out.println("<----------------------------------------------------------------------------------------------------------->");
        System.out.println(permanentDeleteQuery());
        System.out.println("<----------------------------------------------------------------------------------------------------------->");

        try (PreparedStatement statement = connection.prepareStatement(permanentDeleteQuery())) {

            connection.setAutoCommit(false);

            new DefaultPreparedStatementProcessor().process(statement, new WhereQueryParameters(queryCriterion).parameters());
            statement.execute();

            connection.commit();

            return null;
        }
    }

    private String permanentDeleteQuery() throws Exception {
        return "DELETE FROM " + tableName + "  " + new WhereQueryString(queryCriterion).query();
    }

}