package com.senmesh.sfile.service.impl;

import com.senmesh.common.exception.util.Assert;
import com.senmesh.common.util.RandomUtils;
import com.senmesh.common.util.UserContextHolder;
import com.senmesh.sfile.constant.FileStatusEnum;
import com.senmesh.sfile.constant.RootTypeEnum;
import com.senmesh.sfile.dto.ExpandUserFileCreateDTO;
import com.senmesh.sfile.dto.ShareUserFileCreateDTO;
import com.senmesh.sfile.dto.UserFileDTO;
import com.senmesh.sfile.dto.UserFileQueryDTO;
import com.senmesh.sfile.service.ShareUserFileService;
import com.senmesh.sfile.service.UserFileService;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.Calendar;
import java.util.Date;

/**
 * 分享用户文件ServiceImpl
 */
@Service
public class ShareUserFileServiceImpl implements ShareUserFileService {

  @Autowired
  private UserFileService userFileService;

  @Override
  @Transactional
  public Long create(ShareUserFileCreateDTO createDTO) {
    Long userFileId = createDTO.getUserFileId();
    Long userId = UserContextHolder.getExistLoginUserId();
    Integer validDays = createDTO.getValidDays();

    // 根据有效天数计算过期时间
    Calendar calendar = Calendar.getInstance();
    calendar.setTime(new Date());
    calendar.add(Calendar.DAY_OF_MONTH, validDays);
    Date endTime = calendar.getTime();

    // 生成随机6位数字访问码
    String accessCode = RandomUtils.nextSixVerificationCode();

    // 调用UserFileService的重载create方法，根据普通文件创建分享文件
    ExpandUserFileCreateDTO expandCreateDTO = ExpandUserFileCreateDTO.builder()
        .userFileId(userFileId)
        .userId(userId)
        .rootType(RootTypeEnum.SHARE.getType())
        .fileStatus(FileStatusEnum.NORMAL.getStatus())
        .accessCode(accessCode)
        .endTime(endTime)
        .build();
    return userFileService.create(expandCreateDTO).getFolder().getId();
  }

  @Override
  public List<UserFileDTO> list(Long id, String accessCode) {
    UserFileDTO userFileDTO = userFileService.findOne(UserFileQueryDTO.builder()
        .id(id)
        .rootType(RootTypeEnum.SHARE.getType())
        .build());
    Assert.isTrue(userFileDTO.getAccessCode().equals(accessCode), "访问码不正确");

    return userFileService.list(UserFileQueryDTO.builder()
        .rootType(RootTypeEnum.SHARE.getType())
        .pathLike(userFileDTO.getPath())
        .build());
  }


}