/*
 * 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.regex;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;

import org.hedgecode.chess.scanner.ChessHogScannerConstants;

/**
 * RegexBuilder
 *
 * @author Dmitry Samoshin aka gotty
 */
public class RegexBuilder {

    public static String build(Type type, String target, RegexParams params) {
        return type.format(
                target,
                params
        );
    }

    public enum Type {

        TOURNAMENT {
            @Override
            public String format(String target, RegexParams params) {
                if (params.getPageId() != null) {
                    target = target.replace(
                            RegexParams.PAGE_ID,
                            params.getPageId()
                    );
                }
                return target.replace(
                        RegexParams.TOURNAMENT_ID,
                        params.getTournamentId()
                );
            }
        },

        GAME {
            @Override
            public String format(String target, RegexParams params) {
                return target.replace(
                        RegexParams.GAME_ID,
                        params.getGameId()
                );
            }
        },

        QUERY {
            @Override
            public String format(String target, RegexParams params) {
                return target.replace(
                        RegexParams.QUERY,
                        params.isUrlEncode()
                                ? urlEncode(params.getQuery())
                                : params.getQuery()
                );
            }
        };

        public abstract String format(String target, RegexParams params);

        private static String urlEncode(String query) throws RuntimeException {
            String encodeQuery;
            try {
                encodeQuery = URLEncoder.encode(
                        query, ChessHogScannerConstants.CHARSET.name()
                );
            } catch (UnsupportedEncodingException cause) {
                throw new RuntimeException(
                        String.format("Unsupported encoding: %s", ChessHogScannerConstants.CHARSET.name()),
                        cause
                );
            }
            return encodeQuery;
        }

    }

}