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 DeleteTableDataQuery implements QueryMetaData<Void> {

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

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

    @Override
    public Void execute() throws Exception {

        System.out.println("<-------------------------------------------------------------------------->");
        System.out.println("DELETE FROM " + tableName);
        System.out.println("<-------------------------------------------------------------------------->");

        try ( PreparedStatement statement = connection.prepareStatement(deleteString())) {
            new DefaultPreparedStatementProcessor().process(statement, new WhereQueryParameters(queryCriterion).parameters());
            statement.executeUpdate();

            return null;
        }
    }

    private String deleteString() {
        StringBuilder query = new StringBuilder("DELETE FROM ");
        query
                .append(tableName)
                .append(new WhereQueryString(queryCriterion).query());

        return query.toString();
    }
}