package com.moon.server.helper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.moon.server.mapper.all.BasicMapper;
import com.moon.server.mapper.all.GeomBaseMapper;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.aop.support.AopUtils;

import java.lang.reflect.Type;

/**
 * 类帮助类
 * @author WWW
 */
public class ClassHelper {
    private final static Log log = LogFactory.getLog(ClassHelper.class);

    /**
     * 根据类名创建实例
     *
     * @param className 类名
     * @return 实体
     */
    public static Object createInstance(String className) {
        try {
            Class clazz = Class.forName(className);
            Object obj = clazz.newInstance();

            return obj;
        } catch (Exception ex) {
            log.error(ex.getMessage(), ex);
            return null;
        }
    }

    /**
     * 获取Bean
     *
     * @param className 类名
     * @return Bean
     */
    public static Object getBean(String className) {
        try {
            Object obj = SpringContextHelper.getBean(className);

            return obj;
        } catch (Exception ex) {
            log.error(ex.getMessage(), ex);
            return null;
        }
    }

    /**
     * 获取父Mapper
     *
     * @param name Mapper名
     * @return BaseMapper
     */
    public static BasicMapper getBasicMapper(String name) {
        if (StringHelper.isEmpty(name)) {
            return null;
        }

        Object obj = getBean(name.trim() + "Mapper");
        if (!(obj instanceof BasicMapper)) {
            return null;
        }

        return (BasicMapper) obj;
    }

    /**
     * 获取空间父Mapper
     *
     * @param name Mapper名
     * @return GeomBaseMapper
     */
    public static GeomBaseMapper getGeoBaseMapper(String name) {
        if (StringHelper.isEmpty(name)) {
            return null;
        }

        Object obj = getBean(name.trim() + "Mapper");
        if (!(obj instanceof GeomBaseMapper)) {
            return null;
        }

        return (GeomBaseMapper) obj;
    }

    /**
     * 获取类名
     *
     * @param baseMapper 父Mapper
     * @return 类名
     */
    public static String getClassName(BaseMapper baseMapper) {
        Type[] genericInterfaces = AopUtils.getTargetClass(baseMapper).getGenericInterfaces();

        return genericInterfaces[0].getTypeName();
    }

    /**
     * 根据Mapper类名获取实体类的Class
     *
     * @param className Mapper类名
     * @return 实体类的Class
     */
    public static Class getEntityClass(String className) {
        try {
            className = className.replace(".mapper", ".entity").replace("Mapper", "Entity");
            Class clazz = Class.forName(className);

            return clazz;
        } catch (Exception ex) {
            log.error(ex.getMessage(), ex);
            return null;
        }
    }


    /**
     * 根据BaseMapper创建实体类
     *
     * @param baseMapper 父Mapper
     * @return 实体类
     */
    public static Object createEntityByMapper(BaseMapper baseMapper) {
        String className = getClassName(baseMapper);
        className = className.replace(".mapper", ".entity").replace("Mapper", "Entity");

        return createInstance(className);
    }
}