/*
 * 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 java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;

/**
 * External UCI Engine.
 *
 * @author Dmitry Samoshin aka gotty
 */
public class ExternalEngine implements Engine {

    private static final String COMMAND_FORMAT = "%s %s";

    private Transmitter<String> transmitter;
    private PrintWriter engineWriter;

    ExternalEngine(InputStream input, OutputStream output) {
        transmitter = new ExternalEngineTransmitter(input);
        engineWriter = new PrintWriter(output, true);
    }

    public Transmitter<String> transmitter() {
        return transmitter;
    }

    private void write(String command) {
        engineWriter.println(command);
    }

    private String format(String name, String params) {
        return String.format(
                COMMAND_FORMAT, name, params
        );
    }

    @Override
    public void init() {
        write(
                UCIConstants.UCI
        );
    }

    @Override
    public void debug(DebugMode mode) {
        write(
                format(
                        UCIConstants.DEBUG, mode.value()
                )
        );
    }

    @Override
    public void isReady() {
        write(
                UCIConstants.IS_READY
        );
    }

    @Override
    public void go() {
        write(
                UCIConstants.GO // todo: + params
        );
    }

    @Override
    public void stop() {
        write(
                UCIConstants.STOP
        );
    }

    @Override
    public void ponderhit() {
        write(
                UCIConstants.PONDER_HIT
        );
    }

    @Override
    public void quit() {
        write(
                UCIConstants.QUIT
        );
    }

}