package org.springblade.mdm.commons.service;

import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.StringUtils;
import org.flowable.engine.RuntimeService;
import org.springblade.core.log.exception.ServiceException;
import org.springblade.core.mp.base.BizServiceImpl;
import org.springblade.core.oss.OssTemplate;
import org.springblade.core.oss.model.BladeFile;
import org.springblade.core.tool.utils.UrlUtil;
import org.springblade.mdm.flow.entity.FlowProgramFile;
import org.springblade.mdm.flow.mapper.FlowProgramFileMapper;
import org.springblade.mdm.flow.service.FlowCommonService;
import org.springblade.mdm.flow.service.FlowProgramProperties;
import org.springblade.mdm.flow.vo.ProgramUploadVO;
import org.springblade.mdm.program.service.NcNodeService;
import org.springblade.mdm.utils.FileContentUtil;
import org.springblade.mdm.utils.ProgramFileNameCheckUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;

/**
 * OSS文件通用服务，包括下载，返回文件内容等
 *
 * @author yangys
 */
@Slf4j
@Service
public class OssFileCommonService{
	@Autowired
	private OssTemplate ossTemplate;


	/**
	 * 获取文件内容
	 * @param ossFileName 文件id
	 * @return 文件内容文本
	 */
	public String getOssFileContent(String ossFileName) {
		String result;
		try (InputStream inputStream = ossTemplate.statFileStream(ossFileName)) {
			ByteArrayInputStream bos = new ByteArrayInputStream(inputStream.readAllBytes());
			boolean isText = StringUtils.endsWithIgnoreCase(ossFileName,".txt") || StringUtils.endsWithIgnoreCase(ossFileName,".nc")|| StringUtils.endsWithIgnoreCase(ossFileName,".xml");
			if(!isText){
				isText= FileContentUtil.isTextFile(bos);
			}
			if(isText){
				bos.reset();
				result = FileContentUtil.getContentFromStream(bos);
			}else{
				result = "<非文本文件>";
			}
		} catch (IOException e) {
			throw new RuntimeException(e);
		}

		return result;
	}

	/**
	 * 从oss下载文件
	 * @param ossFileName oss的文件名
	 * @param downloadFileName 指定下载的文件名
	 * @param response http相应
	 * @throws IOException 操作文件IO 异常
	 */
	public void download(String ossFileName, String downloadFileName,HttpServletResponse response) throws IOException {
		response.setHeader("Content-Disposition", "attachment; filename="+ UrlUtil.encode(downloadFileName));
		response.setContentType("application/octet-stream");
		try(InputStream ins = ossTemplate.statFileStream(ossFileName);){
			IOUtils.copy(ins,response.getOutputStream());
		}
	}


}