package com.gunshi.project.ss.service;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.gunshi.db.dto.DateTimeRangeSo;
import com.gunshi.project.ss.common.util.LocalDateTimeConverter;
import com.gunshi.project.ss.entity.so.DocCenterPageSo;
import com.gunshi.project.ss.mapper.DocCenterMapper;
import com.gunshi.project.ss.model.DocCategory;
import com.gunshi.project.ss.model.DocCenter;
import com.ruoyi.common.core.domain.entity.SysDept;
import com.ruoyi.common.core.domain.entity.SysUser;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.system.mapper.SysDeptMapper;
import com.ruoyi.system.mapper.SysUserMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.*;
import java.util.stream.Collectors;

@Service
@Slf4j
@Transactional(rollbackFor = Exception.class)
public class DocCenterService  extends ServiceImpl<DocCenterMapper, DocCenter> {

    @Autowired
    private DocCategoryService docCategoryService;

    @Autowired
    private SysUserMapper sysUserMapper;

    @Autowired
    private SysDeptMapper sysDeptMapper;

    @Autowired
    private DocOperateLogService docOperateLogService;

    public Page<DocCenter> pageInfo(DocCenterPageSo pageSo){
        LambdaQueryWrapper<DocCenter> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DocCenter::getDocCategoryId,pageSo.getDocCategoryId());
        if(StringUtils.isNotEmpty(pageSo.getDocName())){
            queryWrapper.like(DocCenter::getDocName,pageSo.getDocName());
        }
        if(pageSo.getSecretLevel() != null){
            queryWrapper.eq(DocCenter::getSecretLevel,pageSo.getSecretLevel());
        }
        queryWrapper.orderByDesc(DocCenter::getCreateTime);
        Page<DocCenter> docCenterPage = this.baseMapper.selectPage(pageSo.getPageSo().toPage(), queryWrapper);
        for (DocCenter record : docCenterPage.getRecords()) {
            if(record.getUserId() != null){
                SysUser sysUser = sysUserMapper.selectUserById(record.getUserId());
                if(sysUser != null){
                    record.setUserName(sysUser.getNickName());
                }
            }
            List<DocCategory> categoryPathRecursive = docCategoryService.findCategoryPathRecursive(record.getDocCategoryId());
            List<String> categoryCodes = new ArrayList<>();
            for (DocCategory docCategory : categoryPathRecursive) {
                categoryCodes.add(docCategory.getCategoryCode());
            }
            categoryCodes.add(record.getDocNumber());
            record.setCategoryCodes(categoryCodes);
            //根据资料中心id查询数据
            DocCategory docCategory = docCategoryService.getBaseMapper().selectById(record.getDocCategoryId());
            if(docCategory != null){
                record.setCategoryName(docCategory.getCategoryName());
            }
            if(record.getReplaceId() != null){
                DocCenter replaceDocCenter = lambdaQuery().eq(DocCenter::getId, record.getReplaceId()).last("limit 1").one();
                if(replaceDocCenter != null){
                    record.setReplaceName(replaceDocCenter.getDocName());
                }
            }
        }
        return docCenterPage;
    }

    public boolean saveData(DocCenter docCenter) {
        if(StringUtils.isBlank(docCenter.getBusinessName())){
            throw new IllegalArgumentException("请传业务名称");
        }
        Long latestDocNumberLong;
        DocCenter theLastDocNumber = lambdaQuery().eq(DocCenter::getDocCategoryId, docCenter.getDocCategoryId()).orderByDesc(DocCenter::getDocNumber).last("limit 1").one();
        if(theLastDocNumber != null){
            String docNumber = theLastDocNumber.getDocNumber();
            latestDocNumberLong = Long.valueOf(docNumber);
            latestDocNumberLong++;
        }else{
            latestDocNumberLong = 1l;
        }

        // 将 count 转换为字符串，前面补0，保持至少4位数字
        String countStr = String.format("%04d", latestDocNumberLong);
        docCenter.setDocNumber(countStr);
        LocalDateTime now = LocalDateTime.now();
        docCenter.setCreateTime(now);
        if(docCenter.getReplaceId() !=  null){
            //如果替换档案ID不为null，废弃原档案
            DocCenter one = lambdaQuery().eq(DocCenter::getId, docCenter.getReplaceId()).one();
            if(one == null){
                throw new IllegalArgumentException("对不起，被替换的档案ID不存在");
            }
            //获取同一组有多少个版本
            List<DocCenter> list = lambdaQuery().eq(DocCenter::getGroupId, one.getGroupId())
                    .orderByDesc(DocCenter::getDocVersion)
                    .list();
            //设置分组id
            docCenter.setGroupId(one.getGroupId());
            docCenter.setDocVersion(new BigDecimal(list.size()).add(BigDecimal.ONE));
            //设置状态为已废除
            one.setIsAbolish(1);
            //设置废止时间（为替换档案的新增时间）
            one.setAbolishTime(now);
            updateById(one);
        }else{
            docCenter.setGroupId(IdWorker.getId());
            docCenter.setDocVersion(BigDecimal.ONE);
            docCenter.setIsAbolish(0);
            docCenter.setAbolishTime(null);
        }
        boolean save = this.save(docCenter);
        docOperateLogService.saveLog(docCenter,1);
        return save;
    }

    public DocCenter deleteById(Integer id) {
        DocCenter center = this.baseMapper.selectById(id);
        if(center == null) return null;
        //根据组id查询版本号比他大的数据,然后这些数据的版本全部降1
        List<DocCenter> versionGe = lambdaQuery().eq(DocCenter::getGroupId, center.getGroupId())
                .ge(DocCenter::getDocVersion,center.getDocVersion().add(BigDecimal.ONE))
                .orderByAsc(DocCenter::getDocVersion)
                .list();
        for (DocCenter docCenter : versionGe) {
            docCenter.setDocVersion( docCenter.getDocVersion().subtract(BigDecimal.ONE) );
        }
        //如果删除的版本为第一版
        if(center.getDocVersion().compareTo(BigDecimal.ONE) == 0 && versionGe.size() > 0){
            //那么第二版的替换版本设置为空
            DocCenter second = versionGe.get(0);
            second.setReplaceId(null);
        }
        //查询版本比它小的数据
        List<DocCenter> versionLe = lambdaQuery().eq(DocCenter::getGroupId, center.getGroupId())
                .le(DocCenter::getDocVersion, center.getDocVersion().subtract(BigDecimal.ONE))
                .orderByDesc(DocCenter::getDocVersion).list();
        //如果是中间版本
        if(versionLe.size() > 0 && versionGe.size() > 0){
            //第一个必它大的版本
            DocCenter versionBig1 = versionGe.get(0);
            //第一个比它小的版本
            DocCenter versionSmall1 = versionLe.get(0);
            versionBig1.setReplaceId(versionSmall1.getId());
        } else if(versionLe.size() > 0){
            //如果删除的是最新的版本的数据
            DocCenter versionSmall1 = versionLe.get(0);
            versionSmall1.setIsAbolish(0);
            versionSmall1.setAbolishTime(null);
        }
        removeById(id);
        if(versionGe.size() > 0){
            updateBatchById(versionGe);
        }
        if(versionLe.size() > 0){
            updateBatchById(versionLe);
        }
        docOperateLogService.saveLog(center,3);
        return center;
    }

    public boolean updateData(DocCenter docCenter) {
        DocCenter one = lambdaQuery().eq(DocCenter::getId, docCenter.getId()).one();
        if(one == null){
            return false;
        }
        //获取替换id
        LocalDateTime now = LocalDateTime.now();
        if(docCenter.getReplaceId() !=  null){
            //如果替换档案ID不为null，废弃原档案
            DocCenter replaceOne = lambdaQuery().eq(DocCenter::getId, docCenter.getReplaceId()).one();
            if(replaceOne == null){
                throw new IllegalArgumentException("对不起，被替换的档案ID不存在");
            }
            //获取同一组有多少个版本
            List<DocCenter> list = lambdaQuery().eq(DocCenter::getGroupId, replaceOne.getGroupId())
                    .orderByDesc(DocCenter::getDocVersion)
                    .list();
            //设置分组id
            docCenter.setGroupId(replaceOne.getGroupId());
            docCenter.setDocVersion(new BigDecimal(list.size()).add(BigDecimal.ONE));
            //设置状态为已废除
            replaceOne.setIsAbolish(1);
            //设置废止时间（为替换档案的新增时间）
            replaceOne.setAbolishTime(now);
            updateById(replaceOne);
        }
        boolean flag = updateById(docCenter);
        docOperateLogService.saveLog(docCenter,2);
        return flag;
    }

    public Map<String, Long> groupByType(DateTimeRangeSo dateTimeRangeSo) {
        Map<String, Long> res = new HashMap<>();
        List<DocCenter> list = lambdaQuery()
                .ge(DocCenter::getCreateTime, dateTimeRangeSo.getStart())
                .le(DocCenter::getCreateTime, dateTimeRangeSo.getEnd()).list();

        //获取去重的所有资料分类ID
        List<Long> categoryIds = list.stream().distinct().map(o -> {
            return o.getDocCategoryId();
        }).collect(Collectors.toList());

        List<DocCategory> level3Category = docCategoryService.lambdaQuery().in(DocCategory::getId, categoryIds).list();

        for (DocCategory docCategory : level3Category) {
            long count = list.stream().filter(o -> {
                return docCategory.getId().equals(o.getDocCategoryId());
            }).count();
            res.put(docCategory.getCategoryName(),count);
        }
        return res;
    }

    public Map<String, Long> groupByDept(DateTimeRangeSo dateTimeRangeSo) {
        List<DocCenter> list = lambdaQuery()
                .ge(DocCenter::getCreateTime, dateTimeRangeSo.getStart())
                .le(DocCenter::getCreateTime, dateTimeRangeSo.getEnd()).list();
        // 按用户ID分组，再转换到部门
        return list.stream()
                .filter(doc -> doc.getUserId() != null)
                .collect(Collectors.groupingBy(
                        DocCenter::getUserId,  // 先按用户分组
                        Collectors.counting()  // 统计每个用户的文档数
                ))
                .entrySet().stream()
                .collect(Collectors.toMap(
                        entry -> {
                            // 根据用户ID获取部门名称
                            Long userId = entry.getKey();
                            Long userDocCount = entry.getValue();

                            SysUser user = sysUserMapper.selectUserById(userId);
                            if (user == null || user.getDeptId() == null) {
                                return "未知部门";
                            }

                            SysDept dept = sysDeptMapper.selectDeptById(user.getDeptId());
                            return dept != null ? dept.getDeptName() : "未知部门";
                        },
                        Map.Entry::getValue,  // 文档数量
                        Long::sum  // 相同部门合并
                ));

    }

    public Map<String, Long> groupBySecret(DateTimeRangeSo dateTimeRangeSo) {
        Map<String, Long> res = new HashMap<>();
        List<DocCenter> list = lambdaQuery()
                .ge(DocCenter::getCreateTime, dateTimeRangeSo.getStart())
                .le(DocCenter::getCreateTime, dateTimeRangeSo.getEnd()).list();

        List<Integer> secretLevel = list.stream().distinct().map(o -> {
            return o.getSecretLevel();
        }).collect(Collectors.toList());
        for (Integer level : secretLevel) {
            long count = list.stream().filter(o -> o.getSecretLevel().equals(level)).count();
            if(level == 0){
                res.put("公开",count);
            }else if(level == 1){
                res.put("秘密",count);
            }else if(level == 2){
                res.put("机密",count);
            }
        }
        return res;
    }

    public Map<String, Long> groupByVersion(DateTimeRangeSo dateTimeRangeSo) {
        List<DocCenter> list = lambdaQuery()
                .ge(DocCenter::getCreateTime, dateTimeRangeSo.getStart())
                .le(DocCenter::getCreateTime, dateTimeRangeSo.getEnd())
                .list();

        return list.stream()
                .filter(doc -> doc.getDocVersion() != null)  // 过滤null值
                .collect(Collectors.groupingBy(
                        doc -> doc.getDocVersion().toString(),  // 转为String作为key
                        Collectors.counting()
                ));
    }

    public Map<String, Long> groupByTm(DateTimeRangeSo dateTimeRangeSo) {
        // 1. 查询数据
        List<DocCenter> list = lambdaQuery()
                .ge(DocCenter::getCreateTime, dateTimeRangeSo.getStart())
                .le(DocCenter::getCreateTime, dateTimeRangeSo.getEnd())
                .list();

        // 2. 按年月分组统计
        Map<String, Long> grouped = list.stream()
                .collect(Collectors.groupingBy(
                        doc -> {
                            LocalDateTime createTime = doc.getCreateTime();
                            // 格式化为年月：2025-11
                            return String.format("%d-%02d",
                                    createTime.getYear(),
                                    createTime.getMonthValue());
                        },
                        Collectors.counting()
                ));

        // 3. 补全缺失的月份
        return fillMissingMonths(grouped, dateTimeRangeSo.getStart(),dateTimeRangeSo.getEnd());
    }

    /**
     * 补全缺失月份的方法
     */
    private Map<String, Long> fillMissingMonths(Map<String, Long> grouped, Date startDate, Date endDate) {
        Map<String, Long> result = new LinkedHashMap<>();  // 保持插入顺序

        // 将Date转换为LocalDateTime
        LocalDateTime start = LocalDateTimeConverter.fromDate(startDate);
        LocalDateTime end = LocalDateTimeConverter.fromDate(endDate);

        // 调整到每月的第一天
        LocalDateTime current = start.withDayOfMonth(1).withHour(0).withMinute(0).withSecond(0).withNano(0);
        LocalDateTime lastMonth = end.withDayOfMonth(1).withHour(0).withMinute(0).withSecond(0).withNano(0);

        // 遍历每个月份
        while (!current.isAfter(lastMonth)) {
            String monthKey = String.format("%d-%02d",
                    current.getYear(),
                    current.getMonthValue());

            // 如果有数据则取数据，否则为0
            result.put(monthKey, grouped.getOrDefault(monthKey, 0L));

            // 下一个月
            current = current.plusMonths(1);
        }

        return result;
    }

    public List<DocCenter> latestDocCenter(Long docCategoryId) {
        List<DocCenter> docCenters = this.baseMapper.latestDocCenter(docCategoryId);
        for (DocCenter record : docCenters) {
            if(record.getUserId() != null){
                SysUser sysUser = sysUserMapper.selectUserById(record.getUserId());
                if(sysUser != null){
                    record.setUserName(sysUser.getNickName());
                }
            }
            List<DocCategory> categoryPathRecursive = docCategoryService.findCategoryPathRecursive(record.getDocCategoryId());
            List<String> categoryCodes = new ArrayList<>();
            for (DocCategory docCategory : categoryPathRecursive) {
                categoryCodes.add(docCategory.getCategoryCode());
            }
            categoryCodes.add(record.getDocNumber());
            record.setCategoryCodes(categoryCodes);
            //根据资料中心id查询数据
            DocCategory docCategory = docCategoryService.getBaseMapper().selectById(record.getDocCategoryId());
            if(docCategory != null){
                record.setCategoryName(docCategory.getCategoryName());
            }
        }
        return docCenters;
    }
}