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/**
 * The MIT License (MIT)
 *
 * Copyright (c) 2011-2016 Incapture Technologies LLC
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package rapture.dsl.iqry;

import rapture.common.exception.RaptureException;
import rapture.common.exception.RaptureExceptionFactory;
import rapture.common.exception.RaptureExceptionFormatter;
import rapture.generated.IndexQueryLexer;
import rapture.generated.IndexQueryParser;
import rapture.generated.IndexQueryParser.qry_return;

import org.antlr.runtime.ANTLRStringStream;
import org.antlr.runtime.CommonTokenStream;
import org.antlr.runtime.RecognitionException;
import org.apache.http.HttpStatus;
import org.apache.log4j.Logger;

public class IndexQueryFactory {
    private static final Logger log = Logger.getLogger(IndexQueryFactory.class);

    public static IndexQuery parseQuery(String query) {
        IndexQueryLexer lexer = new IndexQueryLexer();
        lexer.setCharStream(new ANTLRStringStream(query));
        CommonTokenStream tokens = new CommonTokenStream(lexer);
        IndexQueryParser parser = new IndexQueryParser(tokens);
        try {
            qry_return ret = parser.qry();
            IndexQueryValidator validator = new IndexQueryValidator();
            IndexQuery indexQuery = ret.qry;
            validator.validate(indexQuery);
            return indexQuery;
        } catch (RecognitionException e) {
            RaptureException raptException = RaptureExceptionFactory.create(HttpStatus.SC_INTERNAL_SERVER_ERROR, "Bad query");
            log.error(RaptureExceptionFormatter.getExceptionMessage(raptException, e));
            throw raptException;
        } catch (InvalidQueryException e) {
            throw RaptureExceptionFactory
                    .create(HttpStatus.SC_BAD_REQUEST, String.format("Invalid query. Query is [%s]. Error is %s", query, e.getMessage()), e);
        }
    }
}