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/*
 * This file is part of Log4Jdbc.
 *
 * Log4Jdbc is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Log4Jdbc 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Log4Jdbc.  If not, see .
 *
 */
package fr.ms.log4jdbc.query;

import java.util.HashMap;
import java.util.Map;

import fr.ms.lang.delegate.DefaultStringMakerFactory;
import fr.ms.lang.delegate.StringMaker;
import fr.ms.lang.delegate.StringMakerFactory;
import fr.ms.log4jdbc.rdbms.DataRdbms;
import fr.ms.log4jdbc.rdbms.RdbmsSpecifics;

/**
 *
 * @see Marco4J
 *
 *
 * @author Marco Semiao
 *
 */
public class QuerySQL {

    private final static StringMakerFactory stringFactory = DefaultStringMakerFactory.getInstance();

    private final RdbmsSpecifics rdbms;

    private final String jdbcQuery;

    private final Map params = new HashMap();

    private boolean sqlUpdate;

    private String sql;

    private String typeQuery;

    QuerySQL(final RdbmsSpecifics rdbms, final String jdbcQuery) {
	this.rdbms = rdbms;
	this.jdbcQuery = jdbcQuery;
    }

    public Object putParams(final Object key, final Object value) {
	sqlUpdate = false;
	return params.put(key, value);
    }

    public String getJDBCQuery() {
	return jdbcQuery;
    }

    public Map getJDBCParameters() {
	return params;
    }

    public String getTypeQuery() {
	if (typeQuery == null) {
	    typeQuery = rdbms.getTypeQuery(getSQLQuery());
	}
	return typeQuery;
    }

    public String getSQLQuery() {
	if (!sqlUpdate) {
	    sql = addQueryParameters(jdbcQuery);
	    sqlUpdate = true;
	}

	return sql;
    }

    protected String addQueryParameters(String sql) {
	sql = sql.trim();

	if (params == null || params.isEmpty()) {
	    return sql;
	}

	final StringMaker query = stringFactory.newString();
	int index = 1;
	int lastPos = 0;
	int position = sql.indexOf('?', lastPos);

	while (position != -1) {
	    query.append(sql.substring(lastPos, position));
	    final Integer indexCast = new Integer(index);
	    final Object param = params.get(indexCast);
	    final DataRdbms data = rdbms.getData(param);
	    final String paramFormat = data.getParameter();
	    query.append(paramFormat);

	    lastPos = position + 1;
	    position = sql.indexOf('?', lastPos);
	    index++;
	}

	if (lastPos < sql.length()) {
	    query.append(sql.substring(lastPos, sql.length()));
	}

	return query.toString();
    }

    public String toString() {
	return "QuerySQL [sql=" + getSQLQuery() + "]";
    }
}