/*
 * Copyright (c) 2018. Developed by Hedgecode.
 *
 * 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 org.hedgecode.chess.uci;

import org.hedgecode.chess.uci.annotation.CommandDirection;

/**
 * Synchronized UCI Command Executor.
 *
 * @author Dmitry Samoshin aka gotty
 */
public class SyncCommandExecutor implements CommandExecutor {

    private Engine engine;
    private Acceptor acceptor;
    private CommandDescriptor commandDescriptor;

    private SyncCommandExecutor(Engine engine, Acceptor acceptor) throws Exception {
        this.engine = engine;
        this.acceptor = acceptor;
        initDescriptor();
    }

    private void initDescriptor() throws Exception {
        commandDescriptor = new CommandDescriptor();
    }

    @Override
    public synchronized void exec(String commandName, CommandDirection direction, String params) {
        UCICommand uciCommand = commandDescriptor.getCommand(
                commandName, direction
        );
        if (uciCommand != null) {
            uciCommand.exec(
                    engine, acceptor, params
            );
        } else {
            System.out.println(
                    String.format("%s %s",
                            commandName,
                            params != null ? params : ""
                    ).trim()
            ); // todo
        }
    }

    static final class Factory {

        static CommandExecutor create(Engine engine, Acceptor acceptor) throws Exception {
            return new SyncCommandExecutor(engine, acceptor);
        }

    }

}