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/*
 * Copyright (c) 2020-2030, Shuigedeng ([email protected] & https://blog.taotaocloud.top/).
 *
 * 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
 *
 *      https://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 com.taotao.boot.sensitive.wordother.utils;

import com.google.common.collect.Maps;
import com.taotao.boot.common.utils.lang.ObjectUtils;
import com.taotao.boot.common.utils.lang.StringUtils;
import com.taotao.boot.sensitive.wordother.api.IWordContext;
import com.taotao.boot.sensitive.wordother.constant.enums.ValidModeEnum;

import java.util.Map;

public final class NumUtils {

    private NumUtils() {}

    private static final String NUM_ONE = "⓪０零º₀⓿○"
            + "１２３４５６７８９"
            + "一二三四五六七八九"
            + "壹贰叁肆伍陆柒捌玖"
            + "¹²³⁴⁵⁶⁷⁸⁹"
            + "₁₂₃₄₅₆₇₈₉"
            + "①②③④⑤⑥⑦⑧⑨"
            + "⑴⑵⑶⑷⑸⑹⑺⑻⑼"
            + "⒈⒉⒊⒋⒌⒍⒎⒏⒐"
            + "❶❷❸❹❺❻❼❽❾"
            + "➀➁➂➃➄➅➆➇➈"
            + "➊➋➌➍➎➏➐➑➒"
            + "㈠㈡㈢㈣㈤㈥㈦㈧㈨"
            + "⓵⓶⓷⓸⓹⓺⓻⓼⓽"
            + "㊀㊁㊂㊃㊄㊅㊆㊇㊈"
            + "ⅰⅱⅲⅳⅴⅵⅶⅷⅸ"
            + "ⅠⅡⅢⅣⅤⅥⅦⅧⅨ";

    private static final String NUM_TWO = "0000000"
            + "123456789"
            + "123456789"
            + "123456789"
            + "123456789"
            + "123456789"
            + "123456789"
            + "123456789"
            + "123456789"
            + "123456789"
            + "123456789"
            + "123456789"
            + "123456789"
            + "123456789"
            + "123456789"
            + "123456789"
            + "123456789";

    /** 英文字母 map */
    private static final Map NUMBER_MAP = Maps.newHashMap();

    static {
        final int size = NUM_ONE.length();

        for (int i = 0; i < size; i++) {
            NUMBER_MAP.put(NUM_ONE.charAt(i), NUM_TWO.charAt(i));
        }
    }

    /**
     * 映射后的 char
     *
     * @param character 待转换的 char
     * @return 结果
     */
    public static Character getMappingChar(final Character character) {
        final Character mapChar = NUMBER_MAP.get(character);
        if (ObjectUtils.isNotNull(mapChar)) {
            return mapChar;
        }

        return character;
    }

    public static String getMappingString(final String string) {
        if (StringUtils.isEmpty(string)) {
            return string;
        }

        char[] chars = string.toCharArray();
        StringBuilder stringBuilder = new StringBuilder(chars.length);
        for (char c : chars) {
            char mapChar = getMappingChar(c);

            // TODO: stop word 的处理
            stringBuilder.append(mapChar);
        }

        return stringBuilder.toString();
    }

    /**
     * 检查敏感词数量
     *
     * （1）如果未命中敏感词，直接返回 0 （2）命中敏感词，则返回敏感词的长度。
     *
     * ps: 这里结果进行优化， 1. 是否包含敏感词。 2. 敏感词的长度 3. 正常走过字段的长度（便于后期替换优化，避免不必要的循环重复）
     *
     * @param txt 文本信息
     * @param beginIndex 开始下标
     * @param validModeEnum 验证模式
     * @param context 执行上下文
     * @return 敏感数字对应的长度
     */
    private int getSensitiveNumber(
            final String txt, final int beginIndex, final ValidModeEnum validModeEnum, final IWordContext context) {
        return 0;
    }
}