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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
 * See the NOTICE file distributed with this work for additional information regarding copyright ownership.
 * The ASF licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is
 * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and limitations under the License.
 *
 * =========================================================================================================
 *
 * This software consists of voluntary contributions made by many individuals on behalf of the
 * Apache Software Foundation. For more information on the Apache Software Foundation, please see
 * .
 *
 * +-------------------------------------------------------------------------------------------------------+
 * | License: http://www.apache.org/licenses/LICENSE-2.0.txt 										       |
 * | Author: Yong.Teng  													       |
 * | Copyright @ 2013-2023 Buession.com Inc.														       |
 * +-------------------------------------------------------------------------------------------------------+
 */
package com.buession.beans;

import com.buession.core.utils.Assert;
import com.buession.core.utils.StringUtils;
import org.apache.commons.beanutils.BeanUtilsBean;
import org.apache.commons.beanutils.ConvertUtilsBean;
import org.apache.commons.beanutils.PropertyUtilsBean;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeanInstantiationException;
import org.springframework.cglib.beans.BeanCopier;
import org.springframework.cglib.core.Converter;
import org.springframework.util.ClassUtils;

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

/**
 * Bean 工具类
 *
 * @author Yong.Teng
 * @since 2.0.0
 */
public class BeanUtils {

	private final static Map BEAN_COPIERS = new ConcurrentHashMap<>(32);

	private final static Logger logger = LoggerFactory.getLogger(BeanUtils.class);

	@SuppressWarnings({"unchecked"})
	public static  T instantiateClass(String className) throws BeanInstantiationException {
		return (T) instantiateClass(ClassUtils.resolveClassName(className, null));
	}

	@SuppressWarnings({"unchecked"})
	public static  T instantiateClass(String className, Class assignableTo) throws BeanInstantiationException {
		return instantiateClass((Class) ClassUtils.resolveClassName(className, null), assignableTo);
	}

	public static  T instantiateClass(Class clazz) throws BeanInstantiationException {
		return org.springframework.beans.BeanUtils.instantiateClass(clazz);
	}

	public static  T instantiateClass(Class clazz, Class assignableTo) throws BeanInstantiationException {
		return org.springframework.beans.BeanUtils.instantiateClass(clazz, assignableTo);
	}

	public static  T instantiateClass(Constructor constructor, Object... args) throws BeanInstantiationException {
		return org.springframework.beans.BeanUtils.instantiateClass(constructor, args);
	}

	/**
	 * 属性映射，与方法 copy 最大的区别是：该方法会将原始对象中下划线属性转换成驼峰命名映射到目标对象中
	 *
	 * @param target
	 * 		目标对象
	 * @param source
	 * 		原始对象
	 */
	@Deprecated
	public static void populate(final Object target, final Object source) {
		populate(target, source, null);
	}

	/**
	 * 属性映射，与方法 copy 最大的区别是：该方法会将原始对象中下划线属性转换成驼峰命名映射到目标对象中
	 *
	 * @param target
	 * 		目标对象
	 * @param source
	 * 		原始对象
	 * @param converter
	 * 		转换器
	 */
	@SuppressWarnings({"unchecked"})
	@Deprecated
	public static void populate(final Object target, final Object source, final Converter converter) {
		Assert.isNull(target, "No destination bean specified.");

		if(source == null){
			return;
		}

		if(source instanceof Map){
			HumpBeanUtilsBean humpBeanUtilsBean = new HumpBeanUtilsBean();

			try{
				humpBeanUtilsBean.populate(target, (Map) source);
			}catch(Exception e){
				logger.error("Copy Map to {} error: {}.", target.getClass().getName(), e.getMessage());
			}
			return;
		}

		final String cacheKey = source.getClass().getName() + '_' + target.getClass().getName();
		final BeanCopier beanCopier = BEAN_COPIERS.computeIfAbsent(cacheKey,
				(key)->BeanCopier.create(source.getClass(), target.getClass(), converter != null));

		beanCopier.copy(source, target, converter);
	}

	/**
	 * 属性拷贝；如果源对象是 Map ，将以 key 作为目标对象的属性进行拷贝
	 *
	 * @param target
	 * 		目标对象
	 * @param source
	 * 		原始对象
	 */
	@Deprecated
	public static void copyProperties(final Object target, final Object source) {
		copyProperties(target, source, null);
	}

	/**
	 * 属性拷贝；如果源对象是 Map ，将以 key 作为目标对象的属性进行拷贝
	 *
	 * @param target
	 * 		目标对象
	 * @param source
	 * 		原始对象
	 * @param converter
	 * 		转换器
	 */
	@SuppressWarnings({"unchecked"})
	@Deprecated
	public static void copyProperties(final Object target, final Object source, final Converter converter) {
		Assert.isNull(target, "No destination bean specified.");

		if(source == null){
			return;
		}

		if(source instanceof Map){
			try{
				org.apache.commons.beanutils.BeanUtils.populate(target, (Map) source);
			}catch(Exception e){
				logger.error("Copy Map to {} error: {}.", target.getClass().getName(), e.getMessage());
			}
			return;
		}

		final String cacheKey = source.getClass().getName() + '_' + target.getClass().getName();
		final BeanCopier beanCopier = BEAN_COPIERS.computeIfAbsent(cacheKey,
				(key)->BeanCopier.create(source.getClass(), target.getClass(), converter != null));

		beanCopier.copy(source, target, converter);
	}

	/**
	 * 将 bean 对象转换成 {@link Map} 对象
	 *
	 * @param bean
	 * 		Bean 对象
	 *
	 * @return Map
	 */
	@Deprecated
	public static Map toMap(final Object bean) {
		final BeanConverter converter = new DefaultBeanConverter();
		final Map result = new HashMap<>(16);

		return converter.convert(bean, result);
	}

	private final static class HumpBeanUtilsBean extends BeanUtilsBean {

		private final static Logger logger = LoggerFactory.getLogger(HumpBeanUtilsBean.class);

		public HumpBeanUtilsBean() {
			super();
		}

		public HumpBeanUtilsBean(ConvertUtilsBean convertUtilsBean) {
			super(convertUtilsBean);
		}

		public HumpBeanUtilsBean(ConvertUtilsBean convertUtilsBean, PropertyUtilsBean propertyUtilsBean) {
			super(convertUtilsBean, propertyUtilsBean);
		}

		@Override
		public void populate(Object bean, Map properties)
				throws IllegalAccessException, InvocationTargetException {
			if(bean != null && properties != null){
				if(logger.isDebugEnabled()){
					logger.debug("BeanUtils.populate({}, {})", bean, properties);
				}

				for(Map.Entry e : properties.entrySet()){
					if(StringUtils.contains(e.getKey(), '_')){
						StringBuilder sb = new StringBuilder(e.getKey().length());

						for(int i = 0; i < e.getKey().length(); i++){
							char c = e.getKey().charAt(i);

							if(c == '_'){
								c = e.getKey().charAt(++i);
								sb.append((char) (c - 32));
							}else{
								sb.append(c);
							}
						}

						this.setProperty(bean, sb.toString(), e.getValue());
					}else{
						this.setProperty(bean, e.getKey(), e.getValue());
					}
				}
			}
		}

	}

}