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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.seata.sqlparser.antlr.mysql;

import org.apache.seata.sqlparser.ParametersHolder;
import org.apache.seata.sqlparser.SQLSelectRecognizer;
import org.apache.seata.sqlparser.SQLType;
import org.apache.seata.sqlparser.antlr.mysql.listener.SelectSpecificationSqlListener;
import org.apache.seata.sqlparser.antlr.mysql.parser.MySqlLexer;
import org.apache.seata.sqlparser.antlr.mysql.parser.MySqlParser;
import org.apache.seata.sqlparser.antlr.mysql.stream.ANTLRNoCaseStringStream;
import org.antlr.v4.runtime.CommonTokenStream;
import org.antlr.v4.runtime.tree.ParseTreeWalker;

import java.util.ArrayList;
import java.util.List;

/**
 * AntlrMySQLSelectRecognizer
 *
 */
public class AntlrMySQLSelectRecognizer implements SQLSelectRecognizer {

    private MySqlContext sqlContext;

    public AntlrMySQLSelectRecognizer(String sql) {
        MySqlLexer mySqlLexer = new MySqlLexer(new ANTLRNoCaseStringStream(sql));
        CommonTokenStream commonTokenStream = new CommonTokenStream(mySqlLexer);
        MySqlParser parser = new MySqlParser(commonTokenStream);
        MySqlParser.RootContext root = parser.root();
        ParseTreeWalker walker = new ParseTreeWalker();
        sqlContext = new MySqlContext();
        sqlContext.setOriginalSQL(sql);
        walker.walk(new SelectSpecificationSqlListener(sqlContext), root);
    }

    @Override
    public String getWhereCondition(ParametersHolder parametersHolder, ArrayList> paramAppenderList) {
        return sqlContext.getWhereCondition();
    }

    @Override
    public String getWhereCondition() {
        return sqlContext.getWhereCondition();
    }

    @Override
    public String getLimitCondition() {
        return null;
    }

    @Override
    public String getLimitCondition(ParametersHolder parametersHolder, ArrayList> paramAppenderList) {
        return null;
    }

    @Override
    public String getOrderByCondition() {
        return null;
    }

    @Override
    public String getOrderByCondition(ParametersHolder parametersHolder, ArrayList> paramAppenderList) {
        return null;
    }

    @Override
    public SQLType getSQLType() {
        return SQLType.SELECT;
    }

    @Override
    public String getTableAlias() {
        return sqlContext.tableAlias;
    }

    @Override
    public String getTableName() {
        return sqlContext.tableName;
    }

    @Override
    public String getOriginalSQL() {
        return sqlContext.getOriginalSQL();
    }
}