/**
 * Copyright (c) 2018 人人开源 All rights reserved.
 *
 * https://www.renren.io
 *
 * 版权所有，侵权必究！
 */

package io.renren.common.service.impl;

import com.baomidou.mybatisplus.core.conditions.Wrapper;
import com.baomidou.mybatisplus.core.enums.SqlMethod;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.metadata.OrderItem;
import com.baomidou.mybatisplus.core.toolkit.Constants;
import com.baomidou.mybatisplus.core.toolkit.ReflectionKit;
import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.toolkit.SqlHelper;
import io.renren.common.constant.Constant;
import io.renren.common.page.PageData;
import io.renren.common.service.BaseService;
import io.renren.common.utils.ConvertUtils;
import org.apache.ibatis.binding.MapperMethod;
import org.apache.ibatis.logging.Log;
import org.apache.ibatis.logging.LogFactory;
import org.apache.ibatis.session.SqlSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.annotation.Transactional;

import java.io.Serializable;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.function.BiConsumer;

/**
 * 基础服务类，所有Service都要继承
 *
 * @author Mark sunlightcs@gmail.com
 */
public abstract class BaseServiceImpl<M extends BaseMapper<T>, T>  implements BaseService<T> {
    @Autowired
    protected M baseDao;
    protected Log log = LogFactory.getLog(getClass());

    /**
     * 获取分页对象
     * @param params      分页查询参数
     * @param defaultOrderField  默认排序字段
     * @param isAsc              排序方式
     */
    protected IPage<T> getPage(Map<String, Object> params, String defaultOrderField, boolean isAsc) {
        //分页参数
        long curPage = 1;
        long limit = 10;

        if(params.get(Constant.PAGE) != null){
            curPage = Long.parseLong((String)params.get(Constant.PAGE));
        }
        if(params.get(Constant.LIMIT) != null){
            limit = Long.parseLong((String)params.get(Constant.LIMIT));
        }

        //分页对象
        Page<T> page = new Page<>(curPage, limit);

        //分页参数
        params.put(Constant.PAGE, page);

        //排序字段
        String orderField = (String)params.get(Constant.ORDER_FIELD);
        String order = (String)params.get(Constant.ORDER);

        //前端字段排序
        if(StringUtils.isNotBlank(orderField) && StringUtils.isNotBlank(order)){
            if(Constant.ASC.equalsIgnoreCase(order)) {
                return page.addOrder(OrderItem.asc(orderField));
            }else {
                return page.addOrder(OrderItem.desc(orderField));
            }
        }

        //没有排序字段，则不排序
        if(StringUtils.isBlank(defaultOrderField)){
            return page;
        }

        //默认排序
        if(isAsc) {
            page.addOrder(OrderItem.asc(defaultOrderField));
        }else {
            page.addOrder(OrderItem.desc(defaultOrderField));
        }

        return page;
    }

    protected <T> PageData<T> getPageData(List<?> list, long total, Class<T> target){
        List<T> targetList = ConvertUtils.sourceToTarget(list, target);

        return new PageData<>(targetList, total);
    }

    protected <T> PageData<T> getPageData(IPage page, Class<T> target){
        return getPageData(page.getRecords(), page.getTotal(), target);
    }

    protected void paramsToLike(Map<String, Object> params, String... likes){
        for (String like : likes){
            String val = (String)params.get(like);
            if (StringUtils.isNotBlank(val)){
                params.put(like, "%" + val + "%");
            }else {
                params.put(like, null);
            }
        }
    }

    /**
     * <p>
     * 判断数据库操作是否成功
     * </p>
     * <p>
     * 注意！！ 该方法为 Integer 判断，不可传入 int 基本类型
     * </p>
     *
     * @param result 数据库操作返回影响条数
     * @return boolean
     */
    protected static boolean retBool(Integer result) {
        return SqlHelper.retBool(result);
    }

    protected Class<M> currentMapperClass() {
        return (Class<M>) ReflectionKit.getSuperClassGenericType(this.getClass(), BaseServiceImpl.class, 0);
    }

    @Override
    public Class<T> currentModelClass() {
        return (Class<T>)ReflectionKit.getSuperClassGenericType(this.getClass(), BaseServiceImpl.class, 1);
    }

    protected String getSqlStatement(SqlMethod sqlMethod) {
        return SqlHelper.getSqlStatement(this.currentMapperClass(), sqlMethod);
    }

    @Override
    public boolean insert(T entity) {
        return BaseServiceImpl.retBool(baseDao.insert(entity));
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public boolean insertBatch(Collection<T> entityList) {
        return insertBatch(entityList, 100);
    }

    /**
     * 批量插入
     */
    @Override
    @Transactional(rollbackFor = Exception.class)
    public boolean insertBatch(Collection<T> entityList, int batchSize) {
        String sqlStatement = getSqlStatement(SqlMethod.INSERT_ONE);
        return executeBatch(entityList, batchSize, (sqlSession, entity) -> sqlSession.insert(sqlStatement, entity));
    }

    /**
     * 执行批量操作
     */
    protected <E> boolean executeBatch(Collection<E> list, int batchSize, BiConsumer<SqlSession, E> consumer) {
        return SqlHelper.executeBatch(this.currentModelClass(), this.log, list, batchSize, consumer);
    }


    @Override
    public boolean updateById(T entity) {
        return BaseServiceImpl.retBool(baseDao.updateById(entity));
    }

    @Override
    public boolean update(T entity, Wrapper<T> updateWrapper) {
        return BaseServiceImpl.retBool(baseDao.update(entity, updateWrapper));
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public boolean updateBatchById(Collection<T> entityList) {
        return updateBatchById(entityList, 30);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public boolean updateBatchById(Collection<T> entityList, int batchSize) {
        String sqlStatement = getSqlStatement(SqlMethod.UPDATE_BY_ID);
        return executeBatch(entityList, batchSize, (sqlSession, entity) -> {
            MapperMethod.ParamMap<T> param = new MapperMethod.ParamMap<>();
            param.put(Constants.ENTITY, entity);
            sqlSession.update(sqlStatement, param);
        });
    }

    @Override
    public T selectById(Serializable id) {
        return baseDao.selectById(id);
    }

    @Override
    public boolean deleteById(Serializable id) {
        return SqlHelper.retBool(baseDao.deleteById(id));
    }

    @Override
    public boolean deleteBatchIds(Collection<? extends Serializable> idList) {
        return SqlHelper.retBool(baseDao.deleteBatchIds(idList));
    }
}