package org.springblade.mdm.flow.service;

import lombok.AllArgsConstructor;
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.api.IResultCode;
import org.springblade.core.tool.utils.Func;
import org.springblade.mdm.flow.entity.FlowProgramFile;
import org.springblade.mdm.flow.mapper.FlowProgramFileMapper;
import org.springblade.mdm.flow.vo.ProgramUploadVO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import java.util.List;

/**
 * 流程程序处理，包括上传，查询展示
 *
 * @author yangys
 */
@Slf4j
@Service
public class FlowProgramFileService extends BizServiceImpl<FlowProgramFileMapper, FlowProgramFile> {
	@Autowired
	private OssTemplate ossTemplate;
	@Autowired
	private RuntimeService runtimeService;
	@Autowired
	private FlowCommonService flowCommonService;

	/**
	 * 上传程序徐文件（编制节点调用）
	 * @param uploadVO 上传对象
	 */
	public void uploadFlowProgramFile(ProgramUploadVO uploadVO) {

		FlowProgramProperties progProps= flowCommonService.getProgramProperties(uploadVO.getProcessInstanceId());
		MultipartFile file = uploadVO.getFile();
		checkFilename(file.getOriginalFilename(),progProps);

		String programName = getProgramName(progProps);

		BladeFile bfile = ossTemplate.putFile(file);

		FlowProgramFile progFile = new FlowProgramFile();
		progFile.setName(file.getOriginalFilename());
		progFile.setOssName(bfile.getName());
		progFile.setProcessInstanceId(uploadVO.getProcessInstanceId());
		progFile.setIsCured(0);
		progFile.setProgramName(programName);

		save(progFile);

	}

	/**
	 * 获取程序名称
	 * @param progProps
	 * @return
	 */
	String getProgramName(FlowProgramProperties progProps){
		return progProps.getDrawingNo()+"-"+progProps.getProcessNo();
	}

	/**
	 * 检查文件名合法性
	 * @param filename 文件名
	 * @param programProperties 程序属性，发起时填写的
	 */
	void checkFilename(String filename,FlowProgramProperties programProperties){
		//程序名称：零件号加工序号，文件名应该以此开头
		String expectedProgramName = programProperties.getDrawingNo()+"-"+programProperties.getProcessNo();
		if(!StringUtils.startsWith(filename,expectedProgramName)){

			IResultCode rc = new IResultCode() {
				@Override
				public String getMessage() {
					return "程序文件名不合法，应为："+expectedProgramName+"-"+programProperties.getCraftEdition()+"-[段数]-[段号].[文件扩展名]";
				}

				@Override
				public int getCode() {
					return 1;
				}
			};
			throw new ServiceException(rc);
			//throw new ServiceException("程序文件名不合法，应为："+expectedProgramName+"-"+programProperties.getCraftEdition()+"-[段数]-[段号].[文件扩展名]");
		}

		//截取后面的段数和第几段
		String endPart = StringUtils.removeStart(filename,expectedProgramName+"-"+programProperties.getCraftEdition()+"-");

		//去掉扩展名
		if(endPart.contains(".")){
			endPart = endPart.substring(0,endPart.indexOf("."));
		}

		int sepCount = StringUtils.countMatches(endPart,"-");
		if(sepCount != 1){//- 号应该是1个
			IResultCode rc = new IResultCode() {
				@Override
				public String getMessage() {
					return "程序文件名不合法，应为："+expectedProgramName+"-"+programProperties.getCraftEdition()+"-[段数]-[段号].[文件扩展名]";
				}

				@Override
				public int getCode() {
					return 2;
				}
			};
			throw new ServiceException(rc);
			//throw new ServiceException("程序文件名不合法，应为："+expectedProgramName+"-"+programProperties.getCraftEdition()+"-[段数]-[段号].[文件扩展名]");
		}

		String[] arr = StringUtils.split(endPart,"-");
		if(!StringUtils.isNumeric(arr[0]) || Func.toInt(arr[0]) >99 || Func.toInt(arr[0]) < 1){
			IResultCode rc = new IResultCode() {
				@Override
				public String getMessage() {
					return "程序段数不合法，应为两位以内整数";
				}

				@Override
				public int getCode() {
					return 3;
				}
			};
			throw new ServiceException(rc);
		}
		int segCount = Func.toInt(arr[0]);

		if(!StringUtils.isNumeric(arr[1]) || Func.toInt(arr[1]) < 1 || Func.toInt(arr[1]) > segCount){
			IResultCode rc = new IResultCode() {
				@Override
				public String getMessage() {
					return "程序段号不合法，应为两位以内整数且小于等于段数。";
				}

				@Override
				public int getCode() {
					return 4;
				}
			};
			throw new ServiceException(rc);
		}
	}

	/**
	 * 获取文件内容
	 * @param id
	 * @return
	 */
	public String getFileContent(Long id) {
		String result  ="";

		FlowProgramFile programFile = this.getById(id);
		//if(prog.getIsTextFile()!=null && programFile.getIsTextFile()){
			String fileName = programFile.getOssName();
			try (InputStream inputStream = ossTemplate.statFileStream(fileName)) {
				result = IOUtils.toString(inputStream, StandardCharsets.UTF_8);
			} catch (IOException e) {
				throw new RuntimeException(e);
			}
		//}else{
		//	result = "非文本格式文件";
		//}
		return result;
	}

	/**
	 * 验证程序文件的完整性，仅在编制节点使用
	 * @param processInstanceId 流程实例id
	 */
	public void checkProgramFiles(String processInstanceId,boolean isPass) {
		List<FlowProgramFile> flowPrograms = this.lambdaQuery().eq(FlowProgramFile::getProcessInstanceId, processInstanceId).orderByAsc(FlowProgramFile::getCreateTime).list();
		if(isPass && flowPrograms.isEmpty()){
			throw new ServiceException("请上传程序文件");
		}
		int totalSeg = 0;
		if(!flowPrograms.isEmpty()){
			FlowProgramFile progFile = flowPrograms.get(0);
			totalSeg = getProgramSegCount(progFile.getName());
		}

		if(totalSeg != flowPrograms.size()){
			throw new ServiceException("应上传"+totalSeg+"段程序，实际上传"+flowPrograms.size()+"段");
		}


	}

	/**
	 * 根据文件名获取程序总段树
	 * @param filename 文件名
	 * @return
	 */
	int getProgramSegCount(String filename){
		int idx = filename.lastIndexOf(".");
		String tempstr = filename.substring(0,idx);//去掉扩展名
		//System.out.println(tempstr);
		idx = tempstr.lastIndexOf("-");
		tempstr = tempstr.substring(0,idx);
		//System.out.println(tempstr);
		idx = tempstr.lastIndexOf("-");
		tempstr = tempstr.substring(idx+1);
		//System.out.println(tempstr);
		return Func.toInt(tempstr);
	}
}