package com.opslab.helper;

import java.util.Set;

/**
 * 一些中文相关的帮助类
 */
public class ZhCnHepler {
    /**
     * 数字金额大写转换 先写个完整的然后将如零拾替换成零
     *
     * @param n 数字
     * @return 中文大写数字
     */
    public static String digitUppercase(double n) {
        String[] fraction = {"角", "分"};
        String[] digit = {"零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"};
        String[][] unit = {{"元", "万", "亿"}, {"", "拾", "佰", "仟"}};

        String head = n < 0 ? "负" : "";
        n = Math.abs(n);

        String s = "";
        for (int i = 0; i < fraction.length; i++) {
            s += (digit[(int) (Math.floor(n * 10 * Math.pow(10, i)) % 10)] + fraction[i]).replaceAll("(零.)+", "");
        }
        if (s.length() < 1) {
            s = "整";
        }
        int integerPart = (int) Math.floor(n);

        for (int i = 0; i < unit[0].length && integerPart > 0; i++) {
            String p = "";
            for (int j = 0; j < unit[1].length && n > 0; j++) {
                p = digit[integerPart % 10] + unit[1][j] + p;
                integerPart = integerPart / 10;
            }
            s = p.replaceAll("(零.)*零$", "").replaceAll("^$", "零") + unit[0][i] + s;
        }
        return head + s.replaceAll("(零.)*零元", "元").replaceFirst("(零.)+", "").replaceAll("(零.)+", "零").replaceAll("^整$",
                "零元整");
    }

    /**
     * 半角转全角
     *
     * @param input String.
     * @return 全角字符串.
     */
    public static String toSBC(String input) {
        return toSBC(input, null);
    }

    /**
     * 半角转全角
     *
     * @param input         String
     * @param notConvertSet 不替换的字符集合
     * @return 全角字符串.
     */
    public static String toSBC(String input, Set<Character> notConvertSet) {
        char c[] = input.toCharArray();
        for (int i = 0; i < c.length; i++) {
            if (null != notConvertSet && notConvertSet.contains(c[i])) {
                // 跳过不替换的字符
                continue;
            }

            if (c[i] == ' ') {
                c[i] = '\u3000';
            } else if (c[i] < '\177') {
                c[i] = (char) (c[i] + 65248);

            }
        }
        return new String(c);
    }

    /**
     * 全角转半角
     *
     * @param input String.
     * @return 半角字符串
     */
    public static String toDBC(String input) {
        return toDBC(input, null);
    }

    /**
     * 替换全角为半角
     *
     * @param text          文本
     * @param notConvertSet 不替换的字符集合
     * @return 替换后的字符
     */
    public static String toDBC(String text, Set<Character> notConvertSet) {
        char c[] = text.toCharArray();
        for (int i = 0; i < c.length; i++) {
            if (null != notConvertSet && notConvertSet.contains(c[i])) {
                // 跳过不替换的字符
                continue;
            }

            if (c[i] == '\u3000') {
                c[i] = ' ';
            } else if (c[i] > '\uFF00' && c[i] < '\uFF5F') {
                c[i] = (char) (c[i] - 65248);
            }
        }
        String returnString = new String(c);

        return returnString;
    }
}
