/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j 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.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.neo4j.cypher.internal.parser.javacc;

import java.util.ArrayList;
import java.util.List;
import org.neo4j.cypher.internal.ast.factory.ASTExceptionFactory;
import org.neo4j.cypher.internal.ast.factory.ASTFactory;

public class AliasName<DATABASE_NAME, PARAMETER> {
    ASTExceptionFactory exceptionFactory;
    Token start;
    List<String> names = new ArrayList<>();
    PARAMETER parameter;

    public AliasName(ASTExceptionFactory exceptionFactory, Token token) {
        this.exceptionFactory = exceptionFactory;
        this.start = token;
        this.names.add(token.image);
    }

    public AliasName(ASTExceptionFactory exceptionFactory, PARAMETER parameter) {
        this.exceptionFactory = exceptionFactory;
        this.parameter = parameter;
    }

    public void add(Token token) {
        names.add(token.image);
    }

    public DATABASE_NAME getRemoteAliasName(ASTFactory astFactory) throws Exception {
        if (parameter != null) {
            return (DATABASE_NAME) astFactory.databaseName(parameter);
        } else {
            if (names.size() > 2) {
                throw exceptionFactory.syntaxException(
                        new ParseException(ASTExceptionFactory.invalidDotsInRemoteAliasName(String.join(".", names))),
                        start.beginOffset,
                        start.beginLine,
                        start.beginColumn);
            } else {
                return (DATABASE_NAME) astFactory.databaseName(
                        astFactory.inputPosition(start.beginOffset, start.beginLine, start.beginColumn), names);
            }
        }
    }

    public DATABASE_NAME getLocalAliasName(ASTFactory astFactory) {
        if (parameter != null) {
            return (DATABASE_NAME) astFactory.databaseName(parameter);
        } else {
            return (DATABASE_NAME) astFactory.databaseName(
                    astFactory.inputPosition(start.beginOffset, start.beginLine, start.beginColumn), names);
        }
    }
}
