/*
 * Copyright (c) 2019-2020. 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.scanner.json.format;

import java.util.HashMap;
import java.util.Map;

import org.hedgecode.chess.scanner.ChessHogScannerConstants;
import org.hedgecode.chess.scanner.entity.PGNEntity;
import org.hedgecode.chess.scanner.entity.PGNTag;

/**
 * AbstractPGNFormat
 *
 * @author Dmitry Samoshin aka gotty
 */
public abstract class AbstractPGNFormat extends AbstractBaseFormat implements PGNEntity {

    private static final String EMPTY = "";

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

    private final Map<PGNTag, String> pgnTags = new HashMap<>();
    private String pgnMoves;

    protected abstract void assignPGN();

    protected void addTag(PGNTag tag, String value) {
        pgnTags.put(tag, value);
    }

    protected void addMoves(String moves) {
        pgnMoves = moves;
    }

    private String moves() {
        return pgnMoves != null ? pgnMoves : EMPTY;
    }

    private String result() {
        String result = pgnTags.get(PGNTag.RESULT);
        return result != null ? result : PGNTag.RESULT.defaultValue();
    }

    @Override
    public String pgn() {
        assignPGN();
        StringBuilder sb = new StringBuilder();
        for (PGNTag tag : PGNTag.values()) {
            String tagValue = pgnTags.get(tag);
            if (tag.isRequired() || tagValue != null) {
                sb.append(
                        String.format(
                                PGNTag.TAG_FORMAT,
                                tag.getName(),
                                tagValue != null ? tagValue : tag.defaultValue()
                        )
                ).append(
                        ChessHogScannerConstants.CRLF
                );
            }
        }
        sb.append(
                ChessHogScannerConstants.CRLF
        ).append(
                String.format(MOVES_FORMAT, moves(), result())
        ).append(
                ChessHogScannerConstants.CRLF
        );
        return sb.toString();
    }

}