package com.dobbinsoft.fw.support.mapper;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.ApplicationContext;
import org.springframework.stereotype.Component;

import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.HashMap;
import java.util.Map;

/**
 * ClassName: MapperManager
 * Description: 用来管理 实体 -> Mapper 映射的工具
 *
 * @author: e-weichaozheng
 * @date: 2021-03-30
 */
@Slf4j
@Component
public class MapperManager implements InitializingBean {

    public static final Map<Class, IMapper> map = new HashMap<>();

    @Autowired
    private ApplicationContext applicationContext;

    @Value("${com.dobbinsoft.fw.auto-build-table:F}")
    private String enableAutoTable;

    @Override
    public void afterPropertiesSet() throws Exception {
        Map<String, IMapper> beansOfType = applicationContext.getBeansOfType(IMapper.class);
        beansOfType.forEach((k, v) -> {
            Class<? extends IMapper> clazz = v.getClass();
            Type[] genericInterfaces = clazz.getGenericInterfaces();
            for (Type type : genericInterfaces) {
                if (type instanceof Class) {
                    Class mapperClazz = (Class) type;
                    Type[] iMapperTypes = mapperClazz.getGenericInterfaces();
                    if (iMapperTypes.length > 0) {
                        for (Type t : iMapperTypes) {
                            if (t instanceof ParameterizedType) {
                                ParameterizedType pt = (ParameterizedType) t;
                                if (IMapper.class.isAssignableFrom((Class)pt.getRawType())) {
                                    // 若是IMapper的子类
                                    Class entityClass = (Class) pt.getActualTypeArguments()[0];
                                    map.put(entityClass, v);
                                }
                            }
                        }
                    }
                }
            }
        });
        // 自动建表
        if (this.enableAutoTable.equals("T")) {
            beansOfType.forEach((k, v) -> {
                Integer res = v.tableInit();
                log.info("[初始化表] " + v.getClass().getSimpleName() + " " + res);
            });
        }
    }
}