/*
 * JEF - Copyright 2009-2010 Jiyi (mr.jiyi@gmail.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package jef.database.jsqlparser.util.deparser;

import java.util.Iterator;

import jef.database.jsqlparser.statement.create.CreateTable;
import jef.database.jsqlparser.statement.delete.Delete;
import jef.database.jsqlparser.statement.drop.Drop;
import jef.database.jsqlparser.statement.insert.Insert;
import jef.database.jsqlparser.statement.replace.Replace;
import jef.database.jsqlparser.statement.select.Select;
import jef.database.jsqlparser.statement.select.WithItem;
import jef.database.jsqlparser.statement.truncate.Truncate;
import jef.database.jsqlparser.statement.update.Update;
import jef.database.jsqlparser.visitor.StatementVisitor;

public class StatementDeParser implements StatementVisitor {

    protected StringBuilder buffer;

    public StatementDeParser(StringBuilder buffer) {
        this.buffer = buffer;
    }

    public void visit(CreateTable createTable) {
        CreateTableDeParser createTableDeParser = new CreateTableDeParser(buffer);
        createTableDeParser.deParse(createTable);
    }

    public void visit(Delete delete) {
        SelectDeParser selectDeParser = new SelectDeParser();
        selectDeParser.setBuffer(buffer);
        ExpressionDeParser expressionDeParser = new ExpressionDeParser(selectDeParser, buffer);
        selectDeParser.setExpressionVisitor(expressionDeParser);
        DeleteDeParser deleteDeParser = new DeleteDeParser(expressionDeParser, buffer);
        deleteDeParser.deParse(delete);
    }

    public void visit(Drop drop) {
    }

    public void visit(Insert insert) {
        SelectDeParser selectDeParser = new SelectDeParser();
        selectDeParser.setBuffer(buffer);
        ExpressionDeParser expressionDeParser = new ExpressionDeParser(selectDeParser, buffer);
        selectDeParser.setExpressionVisitor(expressionDeParser);
        InsertDeParser insertDeParser = new InsertDeParser(expressionDeParser, selectDeParser, buffer);
        insertDeParser.deParse(insert);
    }

    public void visit(Replace replace) {
        SelectDeParser selectDeParser = new SelectDeParser();
        selectDeParser.setBuffer(buffer);
        ExpressionDeParser expressionDeParser = new ExpressionDeParser(selectDeParser, buffer);
        selectDeParser.setExpressionVisitor(expressionDeParser);
        ReplaceDeParser replaceDeParser = new ReplaceDeParser(expressionDeParser, selectDeParser, buffer);
        replaceDeParser.deParse(replace);
    }

    public void visit(Select select) {
        SelectDeParser selectDeParser = new SelectDeParser();
        selectDeParser.setBuffer(buffer);
        ExpressionDeParser expressionDeParser = new ExpressionDeParser(selectDeParser, buffer);
        selectDeParser.setExpressionVisitor(expressionDeParser);
        if (select.getWithItemsList() != null && !select.getWithItemsList().isEmpty()) {
            buffer.append("WITH ");
            for (Iterator<WithItem> iter = select.getWithItemsList().iterator(); iter.hasNext(); ) {
                WithItem withItem = iter.next();
                buffer.append(withItem);
                if (iter.hasNext()) buffer.append(",");
                buffer.append(" ");
            }
        }
        select.getSelectBody().accept(selectDeParser);
    }

    public void visit(Truncate truncate) {
    }

    public void visit(Update update) {
        SelectDeParser selectDeParser = new SelectDeParser();
        selectDeParser.setBuffer(buffer);
        ExpressionDeParser expressionDeParser = new ExpressionDeParser(selectDeParser, buffer);
        UpdateDeParser updateDeParser = new UpdateDeParser(expressionDeParser, buffer);
        selectDeParser.setExpressionVisitor(expressionDeParser);
        updateDeParser.deParse(update);
    }

    public StringBuilder getBuffer() {
        return buffer;
    }

    public void setBuffer(StringBuilder buffer) {
        this.buffer = buffer;
    }
}