package org.springblade.mdm.program.service;

import com.alibaba.fastjson.JSONObject;
import lombok.AllArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springblade.core.log.exception.ServiceException;
import org.springblade.core.mp.base.BizEntity;
import org.springblade.core.mp.base.BizServiceImpl;
import org.springblade.core.oss.OssTemplate;
import org.springblade.core.oss.model.BladeFile;
import org.springblade.core.redis.cache.BladeRedis;
import org.springblade.core.secure.utils.AuthUtil;
import org.springblade.core.tool.utils.DateUtil;
import org.springblade.core.tool.utils.FileUtil;
import org.springblade.core.tool.utils.Func;
import org.springblade.mdm.flow.entity.FlowProgramFile;
import org.springblade.mdm.flow.service.CureFlowService;
import org.springblade.mdm.flow.service.FlowProgramFileService;
import org.springblade.mdm.program.entity.NcNode;
import org.springblade.mdm.program.entity.NcProgramExchange;
import org.springblade.mdm.program.mapper.NcProgramExchangeMapper;
import org.springblade.mdm.program.vo.DncSendBackData;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.multipart.MultipartFile;

import java.io.*;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardOpenOption;
import java.time.Duration;
import java.util.*;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

/**
 * DNC回传文件处理服务
 *
 * @author yangys
 */
@Slf4j
@Service
@AllArgsConstructor
public class DNCSendBackService extends BizServiceImpl<NcProgramExchangeMapper, NcProgramExchange> {
	private final CureFlowService cureFlowService;
	private final FlowProgramFileService flowProgramFileService;
	private final NcNodeService ncNodeService;
	private final OssTemplate ossTemplate;
	private final BladeRedis bladeRedis;

	private String getFileKey(){
		return "dncexpfile-"+ AuthUtil.getUserId();
	}
	/**
	 * dnc回传文件上传
	 * @param file DNC回传文件
	 * @return 压缩包内程序包名的列表
	 */
	public List<DncSendBackData> dncSendBackUpload(MultipartFile file) {
		List<DncSendBackData> list;
		try {
			BladeFile bfile = ossTemplate.putFile(file);//上传，供后续入库使用
			//设置一个缓存，2小时过期
			bladeRedis.setEx(getFileKey(),bfile.getName(), Duration.ofHours(2));

			InputStream zipFileInputStream = file.getInputStream();//test

			//byte[] bytes = FileUtil.copyToByteArray(zipFileInputStream);
			list = parseDncZipFromByteArray(zipFileInputStream);

		} catch (IOException e) {
			log.error("上传dnc回传文件失败",e);
			throw new ServiceException("解析DNC回传数据失败");
		}
		return list;
	}


	/**
	 * 从压缩包 解析回传程序列表，这里解析目录即可，目录就是程序包名
	 * @param inputStream 压缩包输入流
	 * @return 回传程序列表
	 * @throws IOException 文件操作异常
	 */
	List<DncSendBackData> parseDncZipFromByteArray(InputStream inputStream) throws IOException {
		List<DncSendBackData> list = new ArrayList<>();
		Path tempZipFile = createTempFile(inputStream);

		try (ZipFile zipFile = new ZipFile(tempZipFile.toFile())) {

			ZipEntry entry;
			Enumeration<? extends ZipEntry> zipEntris = zipFile.entries();
			while (zipEntris.hasMoreElements()) {
				entry = zipEntris.nextElement();
				DncSendBackData progData = new DncSendBackData();
				String entryName = entry.getName();
				if (entry.isDirectory()){
					//目录，才是程序包，
					//查询数据库，对应上才能确认时有效的程序包
					String packageName = StringUtils.removeEnd(entryName,"/");
					List<NcNode> pkgList = ncNodeService.lambdaQuery().eq(NcNode::getNodeType,NcNode.TYPE_PROGRAM_PACKAGE).eq(NcNode::getName, packageName).eq(NcNode::getIsLastEdition,1).list();
					if(!pkgList.isEmpty()) {
						NcNode programPackageNode = pkgList.get(0);
						progData.setId(programPackageNode.getId());
						progData.setProgramName(packageName);

						progData.setFileBackTime(DateUtil.fromInstant(entry.getLastModifiedTime().toInstant()));
						progData.setProgramNo(programPackageNode.getProgramNo());
						list.add(progData);
					}
				}
			}

		}

		return list;
	}


	/**
	 * 入库回传文件,并启动固化流程
	 * @param ids id列表逗号分隔,程序包名 节点的id
	 */
	@Transactional
	public void dncFileAccept(String ids) throws IOException {
		List<Long> idList = Func.toLongList(ids);
		//
		NcProgramExchange exchange;
		String filekey = getFileKey();
		String pkgFileName = bladeRedis.get(filekey);
		log.info("filekey={},文件名={}",filekey,pkgFileName);

		Map<Long,List<NcNode>> programPackageSubMap = new HashMap<>();
		List<NcNode> newProgramPckageList = updateNodeDataByDNCBackData(pkgFileName,idList,programPackageSubMap);
		log.info("需要启动固化流程的程序包名数量:{}",newProgramPckageList.size());
		for(NcNode pkgNode :newProgramPckageList){
			exchange = new NcProgramExchange();
			exchange.setName(pkgNode.getName());
			exchange.setExchangeType(2);//回传
			exchange.setNcNodeId(pkgNode.getId());

			this.save(exchange);
		}
		bladeRedis.del(filekey);
		this.ossTemplate.removeFile(pkgFileName);
		log.info("删除oss文件:{}",pkgFileName);

		cureFlowService.startCure(newProgramPckageList,programPackageSubMap);
	}

	/**
	 * 更新节点，主要是创建 程序包名 的新版本。
	 * @param pkgFileName zip文件名
	 * @param programPackageIdList 程序包名 节点的id列表
	 * @param programPackageSubMap 新的 程序包节点id -> =文件列表 map，用于回传数据
	 * @throws IOException 访问文件异常
	 */
	List<NcNode> updateNodeDataByDNCBackData(String pkgFileName, List<Long> programPackageIdList,Map<Long,List<NcNode>> programPackageSubMap) throws IOException {
		InputStream inputStream = this.ossTemplate.statFileStream(pkgFileName);
		Path tempZipFile = createTempFile(inputStream);
		List<NcNode> newProgramPackageNodeList = new ArrayList<>();
		List<String> entryNameList = new ArrayList<>();

		ZipEntry entry;
		try (java.util.zip.ZipFile zipFile = new java.util.zip.ZipFile(tempZipFile.toFile())) {
			Enumeration<? extends ZipEntry> entris = zipFile.entries();
			while(entris.hasMoreElements()) {
				entry = entris.nextElement();
				entryNameList.add(entry.getName());
			}

			//根据内部文件，读取和分析程序包和程序文件数据
			List<String> dirList = entryNameList.stream().filter(s -> s.endsWith("/")).toList();
			for(String dir : dirList){
				String programPackageName = StringUtils.removeEnd(dir,"/");

				NcNode oriProgramPkg = this.ncNodeService.getLastEditionProgramPackage(programPackageName);
				if(oriProgramPkg == null){
					log.warn("未发现匹配的程序包名{}",programPackageName);
					continue;
				}

				if(!programPackageIdList.contains(oriProgramPkg.getId())){
					//不在勾选的范围内
					log.info("{}不在勾选范围内",programPackageName);
					continue;
				}
				NcNode newProgramPkg = new NcNode();
				BeanUtils.copyProperties(oriProgramPkg, newProgramPkg);
				clearBaseProperties(newProgramPkg);
				newProgramPkg.setIsLastEdition(1);
				ncNodeService.save(newProgramPkg);
				newProgramPackageNodeList.add(newProgramPkg);

				//旧数据更新为老版本
				oriProgramPkg.setIsLocked(1);//旧版自动锁定
				oriProgramPkg.setIsLastEdition(0);;
				ncNodeService.updateById(oriProgramPkg);

				//List<FlowProgramFile> newFlowFiles = new ArrayList<>();
				List<NcNode> newProgramNodes = new ArrayList<>();
				//查找包下的文件数据,
				entryNameList.stream().filter(s -> s.startsWith(dir)).forEach(entryName -> {
					log.info("{}下的文件：{}",dir,entryName);
					if(!entryName.endsWith("/")){
						//实际的文件
						String fileName = StringUtils.removeStart(entryName,dir);//去除文件名路径部分
						NcNode oldProgramNode = this.ncNodeService.getLastEditionProgramFile(fileName,oriProgramPkg.getId());
						if(oldProgramNode == null){
							log.info("{}找不到程序文件",entryName);
							return;
						}

						NcNode newProgramNode = new NcNode();
						BeanUtils.copyProperties(oldProgramNode, newProgramNode);
						clearBaseProperties(newProgramNode);
						newProgramNode.setIsLastEdition(1);
						newProgramNode.setParentId(newProgramPkg.getId());
						newProgramNode.setParentIds(newProgramPkg.getParentIds()+","+newProgramPkg.getId());
						//ncNodeService.save(newProgramNode);
						//将回传文件上传，并记录到数据库

						FlowProgramFile oldFlowFile = flowProgramFileService.getById(newProgramNode.getFlowProgramFileId());

						FlowProgramFile newFlowFile = new FlowProgramFile();//TODO
						BeanUtils.copyProperties(oldFlowFile, newFlowFile);
						newFlowFile.setProcessInstanceId(null);
						clearBaseProperties(newFlowFile);

						try {
							InputStream ins = zipFile.getInputStream(zipFile.getEntry(entryName));
							BladeFile newOssFile = ossTemplate.putFile("mdm",fileName,ins);
							newFlowFile.setOssName(newOssFile.getName());
						} catch (IOException e) {
							throw new RuntimeException(e);
						}
						newProgramNode.setFlowProgramFile(newFlowFile);
						newProgramNode.setVersionNumber(oldProgramNode.genNewVersionNumber());
						newProgramNodes.add(newProgramNode);
						oldProgramNode.setIsLastEdition(0);
						oldProgramNode.setIsLocked(1);
						ncNodeService.updateById(oldProgramNode);
					}
				});

				programPackageSubMap.put(newProgramPkg.getId(),newProgramNodes);
			}

		}


		return newProgramPackageNodeList;
	}

	/**
	 * 创建一个临时zip文件
	 * @param inputStream 文件的输入流
	 * @return path 文件
	 * @throws IOException
	 */
	Path createTempFile(InputStream inputStream) throws IOException {
		byte[] zipData = FileUtil.copyToByteArray(inputStream);
		Path tempFile = Files.createTempFile("tempzip"+System.currentTimeMillis(), ".zip");
		// 写入字节数据到临时文件
		Files.write(tempFile, zipData, StandardOpenOption.WRITE);

		return tempFile;
	}
	void setBaseProperties(BizEntity entity, JSONObject jsonObject){
		entity.setCreateTime(jsonObject.getDate("createTime"));
		entity.setUpdateTime(jsonObject.getDate("updateTime"));
		entity.setStatus(jsonObject.getInteger("status"));
		entity.setCreateUser(jsonObject.getLong("createUser"));
		entity.setUpdateUser(jsonObject.getLong("updateUser"));
	}

	void clearBaseProperties(BizEntity entity){
		entity.setId(null);
		entity.setCreateTime(null);
		entity.setUpdateTime(null);
		entity.setStatus(null);
		entity.setCreateUser(null);
		entity.setUpdateUser(null);
	}
}