/*
 * 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.portal;

import java.util.Base64;

import org.hedgecode.chess.scanner.ChessHogScannerException;
import org.hedgecode.chess.scanner.entity.PGNGame;
import org.hedgecode.chess.scanner.entity.PGNTournament;
import org.hedgecode.chess.scanner.format.ArenaFormat;
import org.hedgecode.chess.scanner.format.Format;
import org.hedgecode.chess.scanner.format.GameFormat;
import org.hedgecode.chess.scanner.format.TournamentFormat;

/**
 * ChessBombScanner
 *
 * @author Dmitry Samoshin aka gotty
 */
public class ChessBombScanner extends AbstractSettingsScanner {

    private static final String SETTINGS_FILENAME = "chessbomb.settings";

    @Override
    protected String getResourceName() {
        return SETTINGS_FILENAME;
    }

    @Override
    public PGNTournament getTournament(String tournamentId) throws ChessHogScannerException {
        String decodeTournament = decodeUrlByRegex(
                assignUrl(tournamentId, null),
                getSettings().getTournamentGamesUrlRegex()
        );

        TournamentFormat tournamentFormat = Format.formatTournament(decodeTournament);

        PGNTournament tournament = new PGNTournament(
                tournamentFormat.id(), tournamentFormat.name()
        );

        for (String gameId : tournamentFormat.gameUrls()) {
            tournament.addGame(
                    getGame(gameId, tournamentId)
            );
        }

        return tournament;
    }

    @Override
    public PGNTournament findTournament(String tournamentName) throws ChessHogScannerException {
        String decodeArena = decodeUrlByRegex(
                assignUrl(tournamentName, false),
                getSettings().getTournamentQueryUrlRegex()
        );

        ArenaFormat arenaFormat = Format.formatArena(decodeArena);

        String tournamentId = arenaFormat.findTournament(tournamentName);

        return tournamentId != null
                ? getTournament(tournamentId)
                : null;
    }

    @Override
    public PGNGame getGame(String gameId) throws ChessHogScannerException {
        throw new ChessHogScannerException(
                "ChessBomb does not support searching game without a tournament name!"
        );
    }

    @Override
    public PGNGame getGame(String gameId, String tournamentId) throws ChessHogScannerException {
        String decodeGame = decodeUrlByRegex(
                assignUrl(gameId, tournamentId, true),
                getSettings().getGameUrlRegex()
        );

        GameFormat gameFormat = Format.formatGame(decodeGame);

        return new PGNGame(
                gameFormat.id(),
                gameFormat.pgn()
        );
    }

    private String decodeUrlByRegex(String url, String regex) throws ChessHogScannerException {
        String encodeString = match(
                url,
                regex
        );
        return new String(
                Base64.getDecoder().decode(encodeString)
        );
    }

}