package org.jeecg.common.system.base.controller;

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.baomidou.mybatisplus.extension.service.IService;
import org.apache.commons.beanutils.PropertyUtils;
import org.apache.shiro.SecurityUtils;
import org.jeecg.common.api.vo.Result;
import org.jeecg.common.system.base.entity.JeecgEntity;
import org.jeecg.common.system.base.service.JeecgService;
import org.jeecg.common.system.query.QueryGenerator;
import org.jeecg.common.system.vo.LoginUser;
import org.jeecg.common.util.oConvertUtils;
import org.jeecgframework.poi.excel.ExcelImportUtil;
import org.jeecgframework.poi.excel.def.NormalExcelConstants;
import org.jeecgframework.poi.excel.entity.ExportParams;
import org.jeecgframework.poi.excel.entity.ImportParams;
import org.jeecgframework.poi.excel.view.JeecgEntityExcelView;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import org.springframework.web.servlet.ModelAndView;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;

import lombok.extern.slf4j.Slf4j;

/**
 * @Description: Controller基类
 * @Author: dangzhenghui@163.com
 * @Date: 2019-4-21 8:13
 * @Version: 1.0
 */
@Slf4j
public class JeecgController<T, S extends IService<T>> {
    @Autowired
    S service;

    /**
     * 导出excel
     *
     * @param request
     */
    protected ModelAndView exportXls(HttpServletRequest request, T object, Class<T> clazz, String title) {
        // Step.1 组装查询条件
        QueryWrapper<T> queryWrapper = QueryGenerator.initQueryWrapper(object, request.getParameterMap());
        LoginUser sysUser = (LoginUser) SecurityUtils.getSubject().getPrincipal();

        // Step.2 获取导出数据
        List<T> pageList = service.list(queryWrapper);
        List<T> exportList = null;

        // 过滤选中数据
        String selections = request.getParameter("selections");
        if (oConvertUtils.isNotEmpty(selections)) {
            List<String> selectionList = Arrays.asList(selections.split(","));
            exportList = pageList.stream().filter(item -> selectionList.contains(getId(item))).collect(Collectors.toList());
        } else {
            exportList = pageList;
        }

        // Step.3 AutoPoi 导出Excel
        ModelAndView mv = new ModelAndView(new JeecgEntityExcelView());
        mv.addObject(NormalExcelConstants.FILE_NAME, title); //此处设置的filename无效 ,前端会重更新设置一下
        mv.addObject(NormalExcelConstants.CLASS, clazz);
        mv.addObject(NormalExcelConstants.PARAMS, new ExportParams(title + "报表", "导出人:" + sysUser.getRealname(), title));
        mv.addObject(NormalExcelConstants.DATA_LIST, exportList);
        return mv;
    }


    /**
     * 获取对象ID
     *
     * @return
     */
    private String getId(T item) {
        try {
            return PropertyUtils.getProperty(item, "id").toString();
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    /**
     * 通过excel导入数据
     *
     * @param request
     * @param response
     * @return
     */
    protected Result<?> importExcel(HttpServletRequest request, HttpServletResponse response, Class<T> clazz) {
        MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
        Map<String, MultipartFile> fileMap = multipartRequest.getFileMap();
        for (Map.Entry<String, MultipartFile> entity : fileMap.entrySet()) {
            MultipartFile file = entity.getValue();// 获取上传文件对象
            ImportParams params = new ImportParams();
            params.setTitleRows(2);
            params.setHeadRows(1);
            params.setNeedSave(true);
            try {
                List<T> list = ExcelImportUtil.importExcel(file.getInputStream(), clazz, params);
                //update-begin-author:taoyan date:20190528 for:批量插入数据
                long start = System.currentTimeMillis();
                service.saveBatch(list);
                //400条 saveBatch消耗时间1592毫秒  循环插入消耗时间1947毫秒
                //1200条  saveBatch消耗时间3687毫秒 循环插入消耗时间5212毫秒
                log.info("消耗时间" + (System.currentTimeMillis() - start) + "毫秒");
                //update-end-author:taoyan date:20190528 for:批量插入数据
                return Result.ok("文件导入成功！数据行数：" + list.size());
            } catch (Exception e) {
                log.error(e.getMessage(), e);
                return Result.error("文件导入失败:" + e.getMessage());
            } finally {
                try {
                    file.getInputStream().close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return Result.error("文件导入失败！");
    }
}
