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package cn.featherfly.common.gentool.exception.util;

import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import cn.featherfly.common.lang.ArrayUtils;

/**
 * 
 * ExceptionCodeCheck
 * 
 * 
 * @author zhongj
 */
public final class ExceptionCodeCheck {
    
    private static final ExceptionCodeCheck CHECK = new ExceptionCodeCheck();
    
    protected final Logger logger = LoggerFactory.getLogger(this.getClass());

    private ExceptionCodeCheck() {
    }

    Map> codes = new HashMap<>(0);

    private void checkCodeDuplicate(Class exceptionCodeType) {
        // Class codeEnumType = ClassUtils.forName(
        // exceptionCodeType.getName() + "$" +
        // GenExceptionCode.class.getSimpleName() + "s");
        Class codeEnumType = exceptionCodeType.getClasses()[0];
        for (Object e : codeEnumType.getEnumConstants()) {
            String code = e.toString();
            logger.debug("check code {} declared in type {}", code, exceptionCodeType.getName());
            Class t = codes.put(e.toString(), exceptionCodeType);
            if (t != null && t != exceptionCodeType) {
                throw new RuntimeException("duplicate code " + code
                        + " declared in type " + exceptionCodeType.getName() + " "
                        + t.getName());
            }
        }
    }
    
    /**
     * checkCode
     * @param exceptionCodeType exceptionCodeType
     */
    public static void checkCode(Class exceptionCodeType) {
        CHECK.checkCodeDuplicate(exceptionCodeType);
    }
    
    /**
     * checkCode
     * @param exceptionCodeTypes exceptionCodeTypes
     */
    public static void checkCode(Collection> exceptionCodeTypes) {
        exceptionCodeTypes.forEach(e -> {
            checkCode(e);
        });
    }
    
    /**
     * checkCode
     * @param exceptionCodeTypes exceptionCodeTypes
     */
    public static void checkCode(Class[] exceptionCodeTypes) {
        checkCode(ArrayUtils.toList(exceptionCodeTypes));
    }
}