package itn.let.mjo.spammsg.web;

import java.util.List;

import itn.let.hangulparser.HangulParser;

public class ComGetSpamStringParser {
	

	/** 
	 * @methodName	: getSpamTextParse 
	 * @author		: 이호영
	 * @date		: 2024.11.13 
	 * @description	: 리펙토링
	 * 					원본 : ComGetSpamStringParser_advc_backup_20241113.java
	 * @param strString
	 * @return
	 * @throws Exception 
	 */
	public static String getSpamTextParse(String strString) throws Exception {
		String smsTxt = strString;
		String repSmsTxt = smsTxt.replaceAll("[^ㄱ-ㅎㅏ-ㅣ가-힣a-zA-Z0-9①ⓒ⒪㈄β]", ""); // 한글, 영문, 숫자 이외의 문자는 제거
		String[] split = repSmsTxt.split(" ");
		StringBuilder reMakeStringText = new StringBuilder();

		try {
			for (String txt : split) {
				txt = processCharacters(txt);
				reMakeStringText.append(" ").append(txt);
			}

			// 분리된 자/모음을 합쳐 최종 문자열 생성
			List<String> jasoList = HangulParser.disassemble(reMakeStringText.toString());
			String assembleStr = HangulParser.assemble(jasoList);

			return assembleStr;

		} catch (Exception e) {
			System.out.println("++++++++++ getSpamTextParse Error !!! " + e);
			return "getSpamTextParse 오류가 발생하였습니다.";
		}
	}

	// 한 단어 내 각 문자에 대한 처리 로직
	private static String processCharacters(String txt) throws Exception {
		StringBuilder processedText = new StringBuilder(txt);

		for (int i = 0; i < txt.length(); i++) {
			char currentChar = txt.charAt(i);
			if (isKorean(currentChar)) continue;

			String tmpStr = Character.toString(currentChar);

			// 자음, 영문, 숫자, 특수문자 각각에 대한 처리
			if (isKoreanConsonant(tmpStr)) {
				txt = handleConsonant(txt, tmpStr, i);
			} else if (isEnglish(tmpStr)) {
				txt = handleEnglish(txt, tmpStr, i);
			} else if (isNumber(tmpStr)) {
				txt = handleNumber(txt, tmpStr, i);
			} else {
				txt = handleSpecialCharacter(txt, tmpStr);
			}
		}

		return processedText.toString();
	}

	// 자음 처리 로직
	private static String handleConsonant(String txt, String tmpStr, int index) throws Exception {
		if (index == txt.length() - 1) return txt;

		String nextCharAt = Character.toString(txt.charAt(index + 1));
		if (isEnglish(nextCharAt)) {
			String repCharAt = getEngToHanglue(nextCharAt);
			txt = txt.replace(tmpStr + nextCharAt, tmpStr + repCharAt);
		}
		return txt;
	}

	// 영문 처리 로직
	private static String handleEnglish(String txt, String engStr, int index) {
		if (index < txt.length() - 1 && index > 0) {
			char nextChar = txt.charAt(index + 1);
			char previousChar = txt.charAt(index - 1);
			if (isKorean(previousChar) && isKorean(nextChar)) {
				txt = txt.replace(engStr, engStr.equalsIgnoreCase("b") ? "비" : "");
			}
		} else if (index > 0 && isKorean(txt.charAt(index - 1))) {
			txt = txt.replace(engStr, "");
		}
		return txt;
	}

	// 숫자 처리 로직
	private static String handleNumber(String txt, String tmpStr, int index) throws Exception {
		if (index == 0) return txt;
		String previousStr = Character.toString(txt.charAt(index - 1));

		if (isKoreanConsonant(previousStr)) {
			String numToStr = getNumberToString(tmpStr);
			txt = txt.replace(previousStr + tmpStr, previousStr + numToStr);
		}
		return txt;
	}

	// 특수문자 처리 로직
	private static String handleSpecialCharacter(String txt, String tmpStr) throws Exception {
		String repSpcStr = getRepSpacialString(tmpStr);
		if (!repSpcStr.isEmpty()) {
			txt = txt.replace(tmpStr, repSpcStr);
		}
		return txt;
	}

	// 문자 유형 판별 메서드
	private static boolean isKorean(char ch) {
		return ch >= 0xAC00;
	}

	private static boolean isKoreanConsonant(String str) {
		return str.matches(".*[ㄱ-ㅎ]+.*");
	}

	private static boolean isEnglish(String str) {
		return str.matches(".*[a-zA-Z]+.*");
	}

	private static boolean isNumber(String str) {
		return str.matches(".*[0-9]+.*");
	}
	
	/*
	 * 
	 * 한글과 유사한 영문자를 변환 처리함
	 * 
	 * */
	public static String getEngToHanglue(String strWord) throws Exception {
		
		String returnStr = "";
		
		try {
			
			if(strWord.toLowerCase().equals("r")) {
				
				returnStr = "ㅏ";
				
			}else if(strWord.toLowerCase().equals("h")) {
				
				returnStr = "ㅐ";
				
			}else if(strWord.toLowerCase().equals("i") || strWord.toLowerCase().equals("I") || strWord.toLowerCase().equals("l")) {
				
				returnStr = "ㅣ";
				
			}
			
		} catch (Exception e) {
			System.out.println("++++++++++++++ getEngToHanglue Error !!! "+e);
		}
		
		return returnStr;
	}
	
	
	/*
	 * 
	 * 한글과 유사한 숫자를 변환처리함
	 * 
	 * */
	public static String getNumberToString(String strWord) throws Exception {
		
		String returnStr = "";
		
		try {
			
			if(strWord.equals("1")) {
				
				returnStr = "ㅣ";
				
			}
			
		} catch (Exception e) {
			System.out.println("++++++++++++++ getNumberToString Error !!! "+e);
		}
		
		return returnStr;
	}
	
	/*
	 * 
	 * 한글과 유사한 특수문자들 변환처리함
	 * 
	 * */
	public static String getRepSpacialString(String strWord) throws Exception{
		
		String returnStr = "";
		
		try {
			
			if(strWord.equals("ⓒ")) {
				returnStr = "c";
			}else if(strWord.equals("β")) {
				returnStr = "비";
			}else if(strWord.equals("⒪")) {
				returnStr = "ㅇ";
			}else if(strWord.equals("㈄")) {
				returnStr = "ㅁ";
			}else if(strWord.equals("①")) {
				returnStr = "ㅣ";
			}
			
		} catch (Exception e) {
			System.out.println("++++++++++++++ getRepSpacialString Error !!! "+e);
		}
		
		return returnStr;
		
	}
	
}