/************************************************************
 *
 * @packageName    : io.company.localhost.utils
 * @fileName       : ExceptionUtil.java
 * @author         : 조인제
 * @date           : 24.12.06
 * @description    :
 *
 * ===========================================================
 * DATE            AUTHOR       NOTE
 * -----------------------------------------------------------
 * 24.12.06        조인제       최초 생성
 *
 *************************************************************/
package io.company.localhost.utils;

import lombok.experimental.UtilityClass;

import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Objects;

// try-catch 시 error 메시지 처리용
// System.out.println(ExceptionUtil.messageTrace(t)); 등등
@UtilityClass
public class ExceptionUtil {

	private static final String delimiter = ": ";

	public static String stackTrace(Throwable t) {
		StringWriter out = new StringWriter();
		try (PrintWriter w = new PrintWriter(out)) {
			t.printStackTrace(w);
		}
		return out.toString();
	}

	public static String messageTrace(Throwable t) {
		if (Objects.isNull(t)) {
			return null;
		}

		StringBuilder sb = new StringBuilder();
		sb.append(t.getClass().getName()).append(delimiter).append(t.getMessage());

		messageTrace(t.getCause(), sb, 4);

		return sb.toString();
	}

	private static void messageTrace(Throwable t, StringBuilder sb, int remaining) {
		if (Objects.isNull(t)) {
			return;
		}
		sb.append('\n').append(t.getClass().getName()).append(delimiter).append(t.getMessage());

		if (remaining == 1) {
			return;
		}

		messageTrace(t.getCause(), sb, --remaining);
	}

}