package com.kidgrow.filecenter.service.impl;

import cn.hutool.core.util.IdUtil;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.kidgrow.common.constant.CommonConstant;
import com.kidgrow.common.model.PageResult;
import com.kidgrow.common.utils.DateUtil;
import com.kidgrow.common.utils.MultipartFileUtils;
import com.kidgrow.common.utils.RandomValueUtils;
import com.kidgrow.common.utils.StringUtils;
import com.kidgrow.filecenter.mapper.FileMapper;
import com.kidgrow.filecenter.model.FileInfo;
import com.kidgrow.filecenter.service.IFileService;
import com.kidgrow.filecenter.util.FileUtil;
import lombok.extern.slf4j.Slf4j;
import net.coobird.thumbnailator.Thumbnails;
import org.apache.commons.collections4.MapUtils;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.Date;
import java.util.List;
import java.util.Map;

/**
 * 石家庄喜高科技有限责任公司 版权所有 © Copyright 2020<br>
 *
 * @Description: <br>
 * @Project: <br>
 * @CreateDate: Created in 2020/2/18 11:24 <br>
 * @Author: <a href="4345453@kidgrow.com">liuke</a>
 */
@Slf4j
public abstract class AbstractIFileService extends ServiceImpl<FileMapper, FileInfo> implements IFileService {
    private static final String FILE_SPLIT = ".";

    @Override
    public FileInfo upload(MultipartFile file) throws Exception {
        FileInfo fileInfo = FileUtil.getFileInfo(file);
        FileInfo oldFileInfo = baseMapper.selectById(fileInfo.getId());
        if (oldFileInfo != null) {
            return oldFileInfo;
        }
        if (!fileInfo.getName().contains(FILE_SPLIT)) {
            throw new IllegalArgumentException("缺少后缀名");
        }
        uploadFile(file, fileInfo);
        // 设置文件来源
        fileInfo.setSource(fileType());
        // 将文件信息保存到数据库
        baseMapper.insert(fileInfo);

        return fileInfo;
    }

    @Override
    public FileInfo upload(MultipartFile file,String imgType) throws Exception {
        FileInfo fileInfo = FileUtil.getFileInfo(file);
        FileInfo oldFileInfo = baseMapper.selectById(fileInfo.getId());
        if (oldFileInfo != null) {
            return oldFileInfo;
        }
        if (!fileInfo.getName().contains(FILE_SPLIT)) {
            throw new IllegalArgumentException("缺少后缀名");
        }
        fileInfo.setImgType(imgType); // X光片或者Logo
        uploadFile(file, fileInfo);
        // 设置文件来源
        fileInfo.setSource(fileType());
        // 将文件信息保存到数据库
        baseMapper.insert(fileInfo);

        return fileInfo;
    }

    /**
     * 文件来源
     *
     * @return
     */
    protected abstract String fileType();

    /**
     * 上传文件
     *
     * @param file
     * @param fileInfo
     */
    protected abstract void uploadFile(MultipartFile file, FileInfo fileInfo) throws Exception;
    protected abstract void fileUpLoadOss(FileInfo fileInfo,String newFilePath, InputStream fileStream);
    protected abstract String FilePath(String imgType,String folderByDate);

    /**
     * 删除文件
     * @param id 文件id
     */
    @Override
    public void delete(String id) {
        FileInfo fileInfo = baseMapper.selectById(id);
        if (fileInfo != null) {
            baseMapper.deleteById(fileInfo.getId());
            this.deleteFile(fileInfo);
        }
    }

    /**
     * 删除文件资源
     *
     * @param fileInfo
     * @return
     */
    protected abstract boolean deleteFile(FileInfo fileInfo);

    @Override
    public PageResult<FileInfo> findList(Map<String, Object> params) {
        Page<FileInfo> page = new Page<>(MapUtils.getInteger(params, "page"), MapUtils.getInteger(params, "limit"));
        List<FileInfo> list = baseMapper.findList(page, params);
        return PageResult.<FileInfo>builder().data(list).code(0).count(page.getTotal()).build();
    }
    /**
     * 上传图片-并缩略，其实是给文件服务器存储了两个文件 一个原文件  一个缩略图文件
     * @param file form内的文件数据
     * @param imgType 业务类型 例如logo
     * @return 返回的实体中  path字段保存的是缩略图地址
     * @throws Exception
     */
    @Override
    public FileInfo uploadForThumbnails(MultipartFile file, String imgType) throws Exception {
        FileInfo fileInfo=this.upload(file,imgType);
        if (StringUtils.isNotBlank(fileInfo.getUrl())) {
            //生成缩略图上传
            File nowFile= MultipartFileUtils.multipartFileToFile(file);
            //暂存目录  发布后真实存在的磁盘目录
            String result = CommonConstant.TEMP_IMAGE_PATH;
            //文件扩展名
            String suffix=file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf("."));
            String newFileName= RandomValueUtils.uuid()+suffix;
            //生成缩略图
            Thumbnails.of(nowFile).size(CommonConstant.TH_IMG_WIDTH, CommonConstant.TH_IMG_HEIGHT).toFile(result+newFileName);
            File thuFile= new File(result+newFileName);
            if (thuFile.exists()) {
                //将生成的文件转换为流
                InputStream inputStream=new FileInputStream(new File(result+newFileName));
                String folderByDate = DateUtil.formatDate(new Date());
                String filefloder=this.FilePath(imgType,folderByDate);
                FileInfo newfileInfo=new FileInfo();
                newfileInfo.setName(newFileName);
                newfileInfo.setId(IdUtil.fastSimpleUUID());
                newfileInfo.setSize(thuFile.length());
                newfileInfo.setIsImg(true);
                newfileInfo.setContentType(file.getContentType());
                newfileInfo.setSource(fileInfo.getSource());
                newfileInfo.setImgType(imgType);
                newfileInfo.setCreateTime(new Date());
                //文件上传到oss
                this.fileUpLoadOss(newfileInfo,filefloder+newFileName,inputStream);
                // 将文件信息保存到数据库
                baseMapper.insert(newfileInfo);
                fileInfo.setPath(newfileInfo.getUrl());
                //删除暂存文件
                MultipartFileUtils.delteTempFile(thuFile);
                inputStream.close();
            }
            return fileInfo;
        }
        else
        {
            return fileInfo;
        }
    }
}