package com.lego.system.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.convert.Convert;
import cn.hutool.core.io.IoUtil;
import cn.hutool.core.util.CharsetUtil;
import cn.hutool.core.util.ObjectUtil;
import cn.hutool.core.util.StrUtil;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.lego.common.constant.CacheNames;
import com.lego.common.core.domain.PageQuery;
import com.lego.common.core.domain.dto.BizFileVo;
import com.lego.common.core.page.TableDataInfo;
import com.lego.common.core.service.ConfigService;
import com.lego.common.core.service.OssService;
import com.lego.common.exception.ServiceException;
import com.lego.common.utils.BeanCopyUtils;
import com.lego.common.utils.EncryptUtils;
import com.lego.common.utils.StringUtils;
import com.lego.common.utils.file.FileUtils;
import com.lego.common.utils.spring.SpringUtils;
import com.lego.oss.core.OssClient;
import com.lego.oss.entity.UploadResult;
import com.lego.oss.enumd.AccessPolicyType;
import com.lego.oss.factory.OssFactory;
import com.lego.system.domain.SysOss;
import com.lego.system.domain.bo.SysOssBo;
import com.lego.system.domain.vo.SysOssVo;
import com.lego.system.mapper.SysOssMapper;
import com.lego.system.service.ISysOssService;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import java.util.*;
import java.util.stream.Collectors;

/**
 * 文件上传 服务层实现
 *
 * @author Lion Li
 */
@RequiredArgsConstructor
@Service
@Slf4j
public class SysOssServiceImpl implements ISysOssService, OssService {

    private final SysOssMapper baseMapper;
    private final ConfigService configService;

    @Override
    public TableDataInfo<SysOssVo> queryPageList(SysOssBo bo, PageQuery pageQuery) {
        LambdaQueryWrapper<SysOss> lqw = buildQueryWrapper(bo);
        Page<SysOssVo> result = baseMapper.selectVoPage(pageQuery.build(), lqw);
        List<SysOssVo> filterResult = result.getRecords().stream().map(this::matchingUrl).collect(Collectors.toList());
        result.setRecords(filterResult);
        return TableDataInfo.build(result);
    }

    private void repUrl(List<SysOssVo> list) {
        String baseUrl = configService.getConfigValue("sys.oss.baseUrl");
        for (SysOssVo vo : list) {
            String url = vo.getUrl();
            if (StrUtil.isNotBlank(url) && StrUtil.isNotBlank(baseUrl)) {
                vo.setUrl(url.replace("127.0.0.1:9000", baseUrl));
            }
        }
    }

    private void repUrl(SysOssVo vo) {
        String baseUrl = configService.getConfigValue("sys.oss.baseUrl");
        if(Objects.nonNull(vo)) {
            String url = vo.getUrl();
            if (StrUtil.isNotBlank(url) && StrUtil.isNotBlank(baseUrl)) {
                vo.setUrl(url.replace("127.0.0.1:9000", baseUrl));
            }
        }
    }

    @Override
    public List<SysOssVo> listByIds(Collection<Long> ossIds) {
        List<SysOssVo> list = new ArrayList<>();
        for (Long id : ossIds) {
            SysOssVo vo = SpringUtils.getAopProxy(this).getById(id);
            if (ObjectUtil.isNotNull(vo)) {
                try {
                    list.add(this.matchingUrl(vo));
                } catch (Exception ignored) {
                    // 如果oss异常无法连接则将数据直接返回
                    list.add(vo);
                }
            }
        }
        repUrl(list);
        return list;
    }

    @Override
    public String selectUrlByIds(String ossIds) {
        List<String> list = new ArrayList<>();
        for (Long id : StringUtils.splitTo(ossIds, Convert::toLong)) {
            SysOssVo vo = SpringUtils.getAopProxy(this).getById(id);
            if (ObjectUtil.isNotNull(vo)) {
                try {
                    list.add(this.matchingUrl(vo).getUrl());
                } catch (Exception ignored) {
                    // 如果oss异常无法连接则将数据直接返回
                    list.add(vo.getUrl());
                }
            }
        }
        String baseUrl = configService.getConfigValue("sys.oss.baseUrl");
        List<String> repList = new ArrayList<>();
        for (String url : list) {
            if (StrUtil.isNotBlank(url) && StrUtil.isNotBlank(baseUrl)) {
                repList.add(url.replace("127.0.0.1:9000", baseUrl));
            }
        }
        return String.join(StringUtils.SEPARATOR, repList);
    }

    @Override
    public List<BizFileVo> selectFileVoByIds(String ossIds) {
        List<BizFileVo> voList = new ArrayList<>();
        String baseUrl = configService.getConfigValue("sys.oss.baseUrl");
        int sort = 0;
        for (Long id : StringUtils.splitTo(ossIds, Convert::toLong)) {
            SysOssVo sysOssVo = SpringUtils.getAopProxy(this).getById(id);
            sort +=1;
            if (null == sysOssVo) {
                log.error("selectFileVoByIds失败，数据不存在，ossId【{}】", id);
                continue;
            }
            try {
                String url = this.matchingUrl(sysOssVo).getUrl();
                if (StrUtil.isNotBlank(baseUrl)) {
                    url = url.replace("127.0.0.1:9000", baseUrl);
                }
                BizFileVo vo = new BizFileVo();
                vo.setOssId(String.valueOf(id));
                vo.setType(sysOssVo.getFileSuffix());
                vo.setUrl(url);
                vo.setSort(sort);
                voList.add(vo);

            } catch (Exception ex) {
                // 如果oss异常无法连接则将数据直接返回
                log.warn("selectFileVoByIds发生异常，ex:", ex);
            }
        }

        return voList;
    }

    private LambdaQueryWrapper<SysOss> buildQueryWrapper(SysOssBo bo) {
        Map<String, Object> params = bo.getParams();
        LambdaQueryWrapper<SysOss> lqw = Wrappers.lambdaQuery();
        lqw.like(StringUtils.isNotBlank(bo.getFileName()), SysOss::getFileName, bo.getFileName());
        lqw.like(StringUtils.isNotBlank(bo.getOriginalName()), SysOss::getOriginalName, bo.getOriginalName());
        lqw.eq(StringUtils.isNotBlank(bo.getFileSuffix()), SysOss::getFileSuffix, bo.getFileSuffix());
        lqw.eq(StringUtils.isNotBlank(bo.getUrl()), SysOss::getUrl, bo.getUrl());
        lqw.between(params.get("beginCreateTime") != null && params.get("endCreateTime") != null,
                SysOss::getCreateTime, params.get("beginCreateTime"), params.get("endCreateTime"));
        lqw.eq(StringUtils.isNotBlank(bo.getCreateBy()), SysOss::getCreateBy, bo.getCreateBy());
        lqw.eq(StringUtils.isNotBlank(bo.getService()), SysOss::getService, bo.getService());
        return lqw;
    }

    @Cacheable(cacheNames = CacheNames.SYS_OSS, key = "#ossId")
    @Override
    public SysOssVo getById(Long ossId) {
        SysOssVo vo =  baseMapper.selectVoById(ossId);
        repUrl(vo);
        return vo;
    }

    @Override
    public void download(Long ossId, HttpServletResponse response) throws IOException {
        SysOssVo sysOss = SpringUtils.getAopProxy(this).getById(ossId);
        if (ObjectUtil.isNull(sysOss)) {
            throw new ServiceException("文件数据不存在!");
        }
        FileUtils.setAttachmentResponseHeader(response, sysOss.getOriginalName());
        response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE + "; charset=UTF-8");
        OssClient storage = OssFactory.instance(sysOss.getService());
        try (InputStream inputStream = storage.getObjectContent(sysOss.getUrl())) {
            int available = inputStream.available();
            IoUtil.copy(inputStream, response.getOutputStream(), available);
            response.setContentLength(available);
        } catch (Exception e) {
            throw new ServiceException(e.getMessage());
        }
    }

    @Override
    public SysOssVo upload(MultipartFile file) {
        String originalfileName = file.getOriginalFilename();
        String suffix = StringUtils.substring(originalfileName, originalfileName.lastIndexOf("."), originalfileName.length());
        OssClient storage = OssFactory.instance();
        UploadResult uploadResult;
        try {
//            if(".pdf".equals(suffix) || ".mp4".equals(suffix) || ".json".equals(suffix) || ".ldr".equals(suffix)) {
//                byte[] encryptBytes = EncryptUtils.encryptByAes(file.getBytes());
//                uploadResult = storage.uploadSuffix(encryptBytes, suffix, file.getContentType());
//            }
//            else{
//                uploadResult = storage.upload(file.getBytes(), originalfileName, file.getContentType());
//            }
            uploadResult = storage.upload(file.getBytes(), originalfileName, file.getContentType());
        } catch (IOException e) {
            throw new ServiceException(e.getMessage());
        }
        // 保存文件信息
        SysOssVo vo =  buildResultEntity(originalfileName, suffix, storage.getConfigKey(), uploadResult);
        repUrl(vo);
        return vo;
    }

    @Override
    public SysOssVo upload(File file) {
        String originalfileName = file.getName();
        String suffix = StringUtils.substring(originalfileName, originalfileName.lastIndexOf("."), originalfileName.length());
        OssClient storage = OssFactory.instance();
        UploadResult uploadResult = storage.uploadSuffix(file, suffix);
        // 保存文件信息
        SysOssVo vo = buildResultEntity(originalfileName, suffix, storage.getConfigKey(), uploadResult);
        repUrl(vo);
        return vo;
    }

    @Override
    public SysOssVo upload(String fileName, String suffix, String contentType, byte[] bytes) {
        OssClient storage = OssFactory.instance();
        UploadResult uploadResult;
        uploadResult = storage.uploadSuffix(bytes, suffix, contentType);
        // 保存文件信息
        SysOss oss = new SysOss();
        oss.setUrl(uploadResult.getUrl());
        oss.setFileSuffix(suffix);
        oss.setFileName(uploadResult.getFilename());
        oss.setOriginalName(fileName);
        oss.setService(storage.getConfigKey());
        baseMapper.insert(oss);
        SysOssVo sysOssVo = new SysOssVo();
        BeanCopyUtils.copy(oss, sysOssVo);
        SysOssVo vo = this.matchingUrl(sysOssVo);
        repUrl(vo);
        return vo;
    }

    public SysOssVo buildResultEntity(String originalfileName, String suffix, String configKey, UploadResult uploadResult) {
        SysOss oss = new SysOss();
        oss.setUrl(uploadResult.getUrl());
        oss.setFileSuffix(suffix);
        oss.setFileName(uploadResult.getFilename());
        oss.setOriginalName(originalfileName);
        oss.setService(configKey);
        baseMapper.insert(oss);
        SysOssVo sysOssVo = BeanUtil.toBean(oss, SysOssVo.class);
        SysOssVo vo = this.matchingUrl(sysOssVo);
        repUrl(vo);
        return vo;
    }

    @Override
    public Boolean deleteWithValidByIds(Collection<Long> ids, Boolean isValid) {
        if (isValid) {
            // 做一些业务上的校验,判断是否需要校验
        }
        List<SysOss> list = baseMapper.selectBatchIds(ids);
        for (SysOss sysOss : list) {
            OssClient storage = OssFactory.instance(sysOss.getService());
            storage.delete(sysOss.getUrl());
        }
        return baseMapper.deleteBatchIds(ids) > 0;
    }
    @Override
    @CacheEvict(cacheNames = CacheNames.SYS_OSS, key = "#ossId")
    public void delete(Long ossId){
    }


    /**
     * 匹配Url
     *
     * @param oss OSS对象
     * @return oss 匹配Url的OSS对象
     */
    private SysOssVo matchingUrl(SysOssVo oss) {
        OssClient storage = OssFactory.instance(oss.getService());
        // 仅修改桶类型为 private 的URL，临时URL时长为120s
        if (AccessPolicyType.PRIVATE == storage.getAccessPolicy()) {
            oss.setUrl(storage.getPrivateUrl(oss.getFileName(), 120));
        }
        return oss;
    }
}