package org.springblade.mdm.machinefile.service;

import jakarta.servlet.ServletOutputStream;
import lombok.AllArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springblade.core.mp.base.BizServiceImpl;
import org.springblade.core.oss.OssTemplate;
import org.springblade.core.tool.utils.DateUtil;
import org.springblade.mdm.machinefile.entity.MachineAcceptedFile;
import org.springblade.mdm.program.entity.NcProgramExchange;
import org.springblade.mdm.program.mapper.NcProgramExchangeMapper;
import org.springblade.mdm.utils.ProgramFileNameParser;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.io.IOException;
import java.io.InputStream;
import java.util.*;
import java.util.stream.Collectors;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

/**
 * 下发/回传程序统计
 *
 * @author yangys
 */
@Slf4j
@Service
@AllArgsConstructor
public class NcProgramExportInnerService extends BizServiceImpl<NcProgramExchangeMapper, NcProgramExchange> {
	private final MachineAcceptedFileService machineAcceptedService;
	private final OssTemplate ossTemplate;


	/**
	 * 导出到涉密网
	 * @param acceptedFileIds
	 * @param os
	 * @throws IOException
	 */
	@Transactional
	public void exportToInner(List<Long> acceptedFileIds, ServletOutputStream os) throws IOException {

		try (ZipOutputStream zipOut = new ZipOutputStream(os);) {//os

			List<MachineAcceptedFile>  acceptedFiles = machineAcceptedService.lambdaQuery().in(MachineAcceptedFile::getId,acceptedFileIds).list();
			Map<String,List<MachineAcceptedFile>> map =  acceptedFiles.stream()
				.collect(Collectors.groupingBy(s -> ProgramFileNameParser.parseProgramName(s.getName()).logicProgramName()));

			List<MachineAcceptedFile> exportedFiles = new ArrayList<>();
			for (Map.Entry<String, List<MachineAcceptedFile>> entry : map.entrySet()) {
				String programName = entry.getKey();
				List<MachineAcceptedFile> acceptedFileList = entry.getValue();
				for (MachineAcceptedFile acceptedFile : acceptedFileList) {
					try(InputStream ins = ossTemplate.statFileStream(acceptedFile.getOssName()) ) {
						addInputStreamToZip(zipOut,ins , programName + "/" + acceptedFile.getName());
					}
					acceptedFile.setExportTime(DateUtil.now());
				}

			}

			machineAcceptedService.updateBatchById(acceptedFiles);
		}

		os.close();
	}


	public void addInputStreamToZip(ZipOutputStream zipOut, InputStream inputStream, String entryName)
		throws IOException {
		// 创建新的 ZIP 条目
		ZipEntry zipEntry = new ZipEntry(entryName);
		zipOut.putNextEntry(zipEntry);

		// 将输入流写入 ZIP 输出流
		byte[] buffer = new byte[1024];
		int length;
		while ((length = inputStream.read(buffer)) >= 0) {
			zipOut.write(buffer, 0, length);
		}

		// 关闭当前条目
		zipOut.closeEntry();
	}
}