/*
 * 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.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * RegexMatcherResult
 *
 * @author Dmitry Samoshin aka gotty
 */
public class RegexMatcherResult implements RegexMatcher, RegexResult {

    private Pattern pattern;
    private Pattern startPattern, endPattern;
    private final boolean isSingle, isFirst, isMap;

    private boolean isMatch = false;
    private boolean isBreak = false;

    private int matchNumber = 0;

    private List<String> resultList = new ArrayList<>();
    private Map<String, String> resultMap = new HashMap<>();

    public RegexMatcherResult(String match, boolean isFirst) {
        this(match, isFirst, false);
    }

    public RegexMatcherResult(String match, boolean isFirst, boolean isMap) {
        this.pattern = Pattern.compile(match);
        this.isSingle = true;
        this.isFirst = isFirst;
        this.isMap = isMap;
    }

    public RegexMatcherResult(String startMatch, String endMatch, boolean isFirst) {
        this(startMatch, endMatch, isFirst, false);
    }

    public RegexMatcherResult(String startMatch, String endMatch, boolean isFirst, boolean isMap) {
        this.startPattern = Pattern.compile(startMatch);
        this.endPattern = Pattern.compile(endMatch);
        this.isSingle = false;
        this.isFirst = isFirst;
        this.isMap = isMap;
    }

    @Override
    public void match(String input) {
        Matcher matcher;
        if (isSingle) {
            matcher = pattern.matcher(input);
            if (matcher.find()) {
                addMatch(matcher);
                if (isFirst) {
                    isBreak = true;
                }
            }
        } else {
            matcher = isMatch ? endPattern.matcher(input) : startPattern.matcher(input);
            if (matcher.find()) {
                add(input);
                if (isMatch && isFirst) {
                    isBreak = true;
                }
                isMatch = !isMatch;
            } else {
                if (isMatch) {
                    add(input);
                }
            }
        }
    }

    private void add(String input) {
        if (isMap) {
            resultMap.put(
                    Integer.toString(matchNumber++),
                    input
            );
        } else {
            resultList.add(
                    input
            );
        }
    }

    private void addMatch(Matcher matcher) {
        if (isMap) {
            resultMap.put(
                    matcher.group(1),
                    matcher.group(2)
            );
        } else {
            resultList.add(
                    matcher.group(1)
            );
        }
    }

    @Override
    public boolean isBreak() {
        return isBreak;
    }

    @Override
    public RegexResult result() {
        return this;
    }

    @Override
    public boolean isEmpty() {
        return isMap ? resultMap.isEmpty() : resultList.isEmpty();
    }

    @Override
    public List<String> resultList() {
        return resultList;
    }

    @Override
    public Map<String, String> resultMap() {
        return resultMap;
    }

}