package org.jeecg.modules.flowable.apithird.business.service.impl;

import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.apache.commons.collections4.CollectionUtils;
import org.flowable.engine.HistoryService;
import org.flowable.engine.TaskService;
import org.flowable.engine.history.HistoricActivityInstance;
import org.flowable.task.api.Task;
import org.jeecg.common.system.vo.LoginUser;
import org.jeecg.modules.flowable.apithird.business.dto.FlowMyBusinessDto;
import org.jeecg.modules.flowable.apithird.business.entity.FlowMyBusiness;
import org.jeecg.modules.flowable.apithird.business.mapper.FlowMyBusinessMapper;
import org.jeecg.modules.flowable.apithird.business.service.IFlowMyBusinessService;
import org.jeecg.modules.flowable.apithird.entity.SysUser;
import org.jeecg.modules.flowable.domain.dto.FlowTaskDto;
import org.jeecg.modules.flowable.util.TimeUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.Resource;
import java.util.Collections;
import java.util.Date;
import java.util.List;

/**
 * @Description: 流程业务扩展表
 * @Author: jeecg-boot
 * @Date:   2021-11-25
 * @Version: V1.0
 */
@Service
public class FlowMyBusinessServiceImpl extends ServiceImpl<FlowMyBusinessMapper, FlowMyBusiness> implements IFlowMyBusinessService {
    @Resource
    private FlowMyBusinessMapper flowMyBusinessMapper;

    @Autowired
    private HistoryService historyService;
    @Autowired
    private TaskService taskService;

    public HistoricActivityInstance getPreviousNode(String taskId) {
        // 获取当前任务的执行实例 ID
        String processInstanceId = historyService.createHistoricTaskInstanceQuery()
                .taskId(taskId)
                .singleResult()
                .getProcessInstanceId();

        // 查询历史活动实例
        List<HistoricActivityInstance> historicActivityInstances = historyService.createHistoricActivityInstanceQuery()
                .processInstanceId(processInstanceId)
                .activityType("userTask")
                .finished()
                .orderByHistoricActivityInstanceEndTime()
                .desc()
                .list();

        // 取第一个结果，即上一级节点
        if (!historicActivityInstances.isEmpty()) {
            return historicActivityInstances.get(0);
        }

        return null;
    }

    @Transactional   // 降低隔离级别
    public FlowMyBusiness getByDataId(String dataId) {
        //如果保存数据前未调用必调的FlowCommonService.initActBusiness方法，就会有问题
        FlowMyBusiness business = flowMyBusinessMapper.selectByDataId(dataId);
        return business;
    }


    public FlowMyBusiness getByProcessInstanceId(String processInstanceId) {
        LambdaQueryWrapper<FlowMyBusiness> flowMyBusinessLambdaQueryWrapper = new LambdaQueryWrapper<>();
        flowMyBusinessLambdaQueryWrapper.eq(FlowMyBusiness::getProcessInstanceId,processInstanceId)
        ;
        //如果保存数据前未调用必调的FlowCommonService.initActBusiness方法，就会有问题
        FlowMyBusiness business = this.getOne(flowMyBusinessLambdaQueryWrapper);
        return business;
    }

    /**
     * 流程-我的已办
     * @param flowMyBusinessDto
     * @return
     */
    public List<FlowTaskDto> ListMyBusiness(FlowMyBusinessDto flowMyBusinessDto){
        return flowMyBusinessMapper.ListMyBusiness(flowMyBusinessDto);
    }

    /**
     * 流程总台账
     * @param flowMyBusinessDto
     * @return
     */
    public IPage<FlowMyBusinessDto> getPageList(Page page, FlowMyBusinessDto flowMyBusinessDto){
        IPage<FlowMyBusinessDto> flowMyBusinessDtoIPage =flowMyBusinessMapper.PageList(page,flowMyBusinessDto);
        flowMyBusinessDtoIPage.getRecords().forEach(item -> {
            if (!("").equals(item.getTaskId())&&item.getTaskId()!=null){
                HistoricActivityInstance historicActivityInstance = getPreviousNode(item.getTaskId());
                if (historicActivityInstance != null){
                    item.setPreNode(historicActivityInstance.getActivityName());
                }
            }
            if (item.getTodoUsers() == null){
                item.setTodoUsers("");
            }else {
                //去除[]
                item.setTodoUsers(item.getTodoUsers().replaceAll("\\[", "").replaceAll("\\]", ""));
                item.setTodoUsers(item.getTodoUsers().replaceAll("\"", ""));
            }

            if (item.getDoneUsers() == null){
                item.setDoneUsers("");
            }else {
                //去除[]
                item.setDoneUsers(item.getDoneUsers().replaceAll("\\[", "").replaceAll("\\]", ""));
                item.setDoneUsers(item.getDoneUsers().replaceAll("\"", ""));
            }
            //计算处理时长
            Date kssj=item.getStartTime();
            Date jssj;
            if (item.getEndTime() != null){
                jssj=item.getEndTime();
            }else {
                jssj=new Date();
            }
            item.setDuration(TimeUtil.howLong(kssj, jssj,2));
        });
        return flowMyBusinessDtoIPage;
    }

    @Override
    public FlowMyBusiness getFlowMyBusiness(String instanceId) {
        List<FlowMyBusiness> businessList = super.list(
                new QueryWrapper<FlowMyBusiness>().eq("process_instance_id", instanceId));
        return businessList.isEmpty() ? null : businessList.get(0);
    }

    @Override
    public FlowMyBusiness getFlowMyBusiness(String instanceId, String taskId) {
        List<FlowMyBusiness> businessList = super.list(
                new QueryWrapper<FlowMyBusiness>().eq("process_instance_id", instanceId).eq("task_id", taskId));
        return businessList.isEmpty() ? null : businessList.get(0);
    }

    @Override
    public FlowMyBusiness selectByDataId(String dataId) {
        List<FlowMyBusiness> businessList = super.list(
                new QueryWrapper<FlowMyBusiness>().eq("data_id", dataId));
        return businessList.isEmpty() ? null : businessList.get(0);
    }

    @Override
    public List<FlowMyBusiness> selectListByDataId(String dataId) {
        //如果保存数据前未调用必调的FlowCommonService.initActBusiness方法，就会有问题
        LambdaQueryWrapper<FlowMyBusiness> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(FlowMyBusiness::getDataId, dataId);
        List<FlowMyBusiness> list = flowMyBusinessMapper.selectList(queryWrapper);
        if(CollectionUtils.isEmpty(list)){
            return Collections.emptyList();
        }
        return list;
    }

    @Override
    public boolean isUserAuthorized(FlowMyBusiness flowMyBusiness, LoginUser user) {
        List<String> todoUsers = JSON.parseArray(flowMyBusiness.getTodoUsers(), String.class);
        return todoUsers != null && todoUsers.contains(user.getUsername());
    }

    @Override
    public boolean claimTask(String taskId, LoginUser user) {
        Task task = taskService.createTaskQuery().taskId(taskId).singleResult();
        if (task == null) {
            return false;
        }
        if (task.getAssignee() != null && !task.getAssignee().equals(user.getUsername())) {
            return false;
        }
        taskService.claim(taskId, user.getUsername());
        return true;
    }


}