/*
 * Copyright (c) 2018-2019. 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.qrcode;

import org.hedgecode.chess.Parsers;
import org.hedgecode.chess.game.Game;
import org.hedgecode.chess.position.ParseException;
import org.hedgecode.chess.position.Parser;
import org.hedgecode.chess.position.Position;

/**
 * Result storage for chess-specific QR Codes data.
 *
 * @author Dmitry Samoshin aka gotty
 */
public class ChessQRResult {

    private ChessQRCodeMode mode;
    private String contents;
    private Position position;
    private Game game;

    public ChessQRResult(ChessQRCodeMode mode, String contents) {
        this.mode = mode;
        this.contents = contents;
    }

/*
    ChessQRResult(Position position) {
        this.position = position;
    }

    ChessQRResult(Game game) {
        this.game = game;
    }
*/

    public ChessQRCodeMode getMode() {
        return mode;
    }

    public String getContents() {
        return contents;
    }

    public Position getPosition() throws ChessQRCodeException {
        if (position == null) {
            if (mode != null && mode.isPosition()) {
                try {
                    position = getPositionParser().parse(contents);
                } catch (ParseException e) {
                    throw new ChessQRCodeException(
                            ChessQRCodeException.Type.PARSE, null, e.getMessage()
                    );
                }
            }
        }
        return position;
    }

    public Game getGame() {
        // todo
        return game;
    }

    private Parser getPositionParser() throws ChessQRCodeException {
        switch (mode) {
            case FEN:
                return Parsers.FEN.parser();
            case TCD:
                return Parsers.TCD.parser();
            default:
                throw new ChessQRCodeException(
                        ChessQRCodeException.Type.PARSE, "parse.unknown.position.format"
                );
        }
    }

    public static ChessQRCodeMode getMode(String contents) {
        return ChessQRCodeMode.byCode(
                contents.substring(0, ChessQRCodeMode.CODE_LENGTH)
        );
    }

    public static String getContents(String contents) {
        return contents.substring(ChessQRCodeMode.CODE_LENGTH);
    }

}