package com.ots.common.utils.text;
import com.ots.common.utils.StringUtils;

public class StrFormatter {
    public static final String EMPTY_JSON = "{}";
    public static final char C_BACKSLASH = '\\';
    public static final char C_DELIM_START = '{';
    public static final char C_DELIM_END = '}';
    
    public static String format(final String strPattern, final Object... argArray) {
        if (StringUtils.isEmpty(strPattern) || StringUtils.isEmpty(argArray)) {
            return strPattern;
        }
        final int strPatternLength = strPattern.length();
        
        StringBuilder sbuf = new StringBuilder(strPatternLength + 50);
        int handledPosition = 0;
        int delimIndex;
        for (int argIndex = 0; argIndex < argArray.length; argIndex++) {
            delimIndex = strPattern.indexOf(EMPTY_JSON, handledPosition);
            if (delimIndex == -1) {
                if (handledPosition == 0) {
                    return strPattern;
                } else { 
                    sbuf.append(strPattern, handledPosition, strPatternLength);
                    return sbuf.toString();
                }
            } else {
                if (delimIndex > 0 && strPattern.charAt(delimIndex - 1) == C_BACKSLASH) {
                    if (delimIndex > 1 && strPattern.charAt(delimIndex - 2) == C_BACKSLASH) {
                        
                        sbuf.append(strPattern, handledPosition, delimIndex - 1);
                        sbuf.append(Convert.utf8Str(argArray[argIndex]));
                        handledPosition = delimIndex + 2;
                    } else {
                        
                        argIndex--;
                        sbuf.append(strPattern, handledPosition, delimIndex - 1);
                        sbuf.append(C_DELIM_START);
                        handledPosition = delimIndex + 1;
                    }
                } else {
                    
                    sbuf.append(strPattern, handledPosition, delimIndex);
                    sbuf.append(Convert.utf8Str(argArray[argIndex]));
                    handledPosition = delimIndex + 2;
                }
            }
        }
        
        
        sbuf.append(strPattern, handledPosition, strPattern.length());
        return sbuf.toString();
    }
}