package cn.cslg.pas.service.impl;

import cn.cslg.pas.common.model.dto.*;
import cn.cslg.pas.common.model.vo.PathStructureNameVO;
import cn.cslg.pas.common.model.vo.StructurePictureVO;
import cn.cslg.pas.common.model.vo.StructureVO;
import cn.cslg.pas.common.utils.FileUtils;
import cn.cslg.pas.domain.Structure;
import cn.cslg.pas.domain.asso.AssoStructurePicture;
import cn.cslg.pas.exception.XiaoShiException;
import cn.cslg.pas.mapper.AssoStructurePictureMapper;
import cn.cslg.pas.mapper.StructureMapper;
import cn.cslg.pas.service.IStructureService;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

/**
 * 架构的Service层接口实现类
 *
 * @Author chenyu
 * @Date 2023/3/10
 */
@RequiredArgsConstructor
@Slf4j
@Service
public class StructureServiceImpl implements IStructureService {
    private final StructureMapper structureMapper;
    private final AssoStructurePictureMapper assoStructurePictureMapper;
    private final FileUtils fileUtils;

    /**
     * 新增架构
     *
     * @param structureAddNewDTO 新增架构DTO对象
     * @param files              架构图片
     */
    @Override
    public void addNew(StructureAddNewDTO structureAddNewDTO, List<MultipartFile> files) {
        log.info("开始处理【新增架构】的业务，参数为：{}, {}", structureAddNewDTO, files);

        //取出DTO中父级id，若父级id为null则表示该架构为第1级架构，手动给其父级id设为0
        if (structureAddNewDTO.getParentId() == null) {
            structureAddNewDTO.setParentId(0);
        }

        Integer parentId = structureAddNewDTO.getParentId();
        String structureName = structureAddNewDTO.getStructureName();
        //检查名称是否被占用(检查当前架构父级下是否有同名架构)
        log.info("检查名称是否被占用(检查当前父级下是否有同名架构)");
        int count = structureMapper.countByparentIdAndStructureName(parentId, structureName, null);
        if (count > 0) {
            String message = "新增架构失败，当前父级下已存在【" + structureName + "】，请尝试更换名称";
            log.info("{}", message);
            throw new XiaoShiException(message);
        }

        //DTO对象赋值给实体类
        Structure structure = new Structure();
        BeanUtils.copyProperties(structureAddNewDTO, structure);
        //数据入架构表(此时数据暂不含路径path)
        log.info("数据入架构表");
        int rows = structureMapper.insert(structure);
        if (rows != 1) {
            String message = "新增架构失败，服务器忙请稍后再次尝试!";
            log.info("{}", message);
            throw new XiaoShiException(message);
        }

        //数据入架构表后，取出id
        Integer structureId = structure.getId();
        String parentPath = structureAddNewDTO.getParentPath();
        String path;
        if (parentPath != null) {
            path = parentPath + "," + structureId;
        } else {
            path = "0," + structureId;
        }
        structure.setPath(path);
        log.info("更新架构表");
        rows = structureMapper.update(structure);
        if (rows != 1) {
            String message = "新增架构失败，服务器忙请稍后再次尝试!";
            log.info("{}", message);
            throw new XiaoShiException(message);
        }

        //如果前端有传来架构图片，则图片上传服务器并获取图片信息，将图片信息入架构图片关联表
        if (files != null && files.size() > 0) {
            ArrayList<AssoStructurePicture> assoStructurePictures = new ArrayList<>();
            for (MultipartFile file : files) {
                UploadFileDTO fileDTO = fileUtils.uploadFile(file);
                AssoStructurePicture assoStructurePicture = new AssoStructurePicture()
                        .setStructureId(structureId)
                        .setName(fileDTO.getName())
                        .setSuffix(fileDTO.getExtName())
                        .setUrl(fileDTO.getPath());
                assoStructurePictures.add(assoStructurePicture);
            }
            rows = assoStructurePictureMapper.insertBatch(assoStructurePictures);
            if (rows != assoStructurePictures.size()) {
                String message = "新增架构失败，数据入架构图片关联表失败，服务器忙请稍后再次尝试!";
                log.info("{}", message);
                throw new XiaoShiException(message);
            }
        }

        log.info("新增架构完成");

    }

    /**
     * 修改架构
     *
     * @param structureUpdateDTO 修改架构DTO对象
     * @param files              架构图片
     */
    @Override
    public void update(StructureUpdateDTO structureUpdateDTO, List<MultipartFile> files) {
        log.info("开始处理【修改架构】的业务，参数为：{}, {}", structureUpdateDTO, files);

        //检查尝试修改的数据是否存在
        Integer structureId = structureUpdateDTO.getId();
        log.info("检查尝试修改的数据是否存在");
        Structure queryResult = structureMapper.getStandardById(structureId);
        if (queryResult == null) {
            String message = "修改架构失败，尝试访问的数据已不存在";
            log.info("{}", message);
            throw new XiaoShiException(message);
        }

        Integer newParentId = structureUpdateDTO.getParentId();
        String newStructureName = structureUpdateDTO.getStructureName();
        //检查名称是否被占用(检查当前尝试修改的架构父级下是否有同名架构)
        log.info("检查名称是否被占用(检查当前尝试修改的架构父级下是否有同名架构)");
        int count = structureMapper.countByparentIdAndStructureName(newParentId, newStructureName, structureId);
        if (count > 0) {
            String message = "修改架构失败，当前尝试修改的架构父级下已存在【" + newStructureName + "】，请尝试更换名称";
            log.info("{}", message);
            throw new XiaoShiException(message);
        }

        //DTO对象赋值给实体类
        Structure structure = new Structure();
        BeanUtils.copyProperties(structureUpdateDTO, structure);
        String parentPath = structureUpdateDTO.getParentPath();
        if (parentPath == null) {
            parentPath = "0";
        }
        String oldPath = queryResult.getPath();
        String newPath = parentPath + "," + structureId;
        if (!newPath.equals(oldPath)) {
            structure.setPath(newPath);
        }

        //架构表修改数据
        log.info("架构表修改数据");
        int rows = structureMapper.update(structure);
        if (rows != 1) {
            String message = "修改架构失败，服务器忙请稍后再次尝试!";
            log.info("{}", message);
            throw new XiaoShiException(message);
        }

        //如果当前修改的架构更换了父级，则要将当前架构下所有子级架构的路径也都更新
        Integer oldParentId = queryResult.getParentId();
        if (!oldParentId.equals(newParentId)) {
            //根据当前架构原来的路径查询所有子级架构
            List<StructureVO> structures = structureMapper.selectByFindInSetPath(oldPath);
            for (StructureVO n : structures) {
                String path = n.getPath();
                //从当前架构(即它们的父级架构)的原来的路径的长度的位置处截取后面路径
                String behindString = path.substring(oldPath.length());
                path = newPath + behindString;
                n.setPath(path);
                Structure structure2 = new Structure();
                BeanUtils.copyProperties(n, structure2);
                log.info("修改当前已更换父级的架构的子级架构路径path");
                rows = structureMapper.update(structure2);
                if (rows != 1) {
                    String message = "修改架构失败，修改当前已更换父级的架构的子级架构路径path失败，服务器忙请稍后再次尝试!";
                    log.info("{}", message);
                    throw new XiaoShiException(message);
                }
            }
        }

        //架构图片关联表删除数据(若有原有图片被删除)
        //根据架构id查询出所有原有图片
        log.info("根据架构id查询出所有原有图片");
        List<StructurePictureVO> structurePictures = assoStructurePictureMapper.selectByStructureId(structureId);
        ArrayList<Integer> oldPictureIds = new ArrayList<>();
        for (StructurePictureVO structurePicture : structurePictures) {
            Integer oldPictureId = structurePicture.getId();
            oldPictureIds.add(oldPictureId);
        }
        //从DTO中获取传过来的原有图片
        List<StructurePictureUpdateDTO> pictures = structureUpdateDTO.getPictures();
        ArrayList<Integer> newOldPictureIds = new ArrayList<>();
        for (StructurePictureUpdateDTO picture : pictures) {
            Integer newOldPictureId = picture.getId();
            newOldPictureIds.add(newOldPictureId);
        }
        //图片id集合去重，保留下来的即被删除的图片id
        oldPictureIds.removeAll(newOldPictureIds);

        if (oldPictureIds.size() > 0) {
            log.info("架构图片关联表删除数据");
            rows = assoStructurePictureMapper.deleteByIds(oldPictureIds);
            if (rows != oldPictureIds.size()) {
                String message = "修改架构失败，架构图片关联表删除数据失败，服务器忙请稍后再次尝试!";
                log.info("{}", message);
                throw new XiaoShiException(message);
            }
        }

        //数据入架构图片关联表(若有新增新图片)
        if (files != null && files.size() != 0) {
            ArrayList<AssoStructurePicture> assoStructurePictures = new ArrayList<>();
            for (MultipartFile file : files) {
                UploadFileDTO fileDTO = fileUtils.uploadFile(file);
                AssoStructurePicture assoStructurePicture = new AssoStructurePicture()
                        .setStructureId(structureId)
                        .setName(fileDTO.getName())
                        .setSuffix(fileDTO.getExtName())
                        .setUrl(fileDTO.getPath());
                assoStructurePictures.add(assoStructurePicture);
            }
            log.info("数据入架构图片关联表");
            rows = assoStructurePictureMapper.insertBatch(assoStructurePictures);
            if (rows != files.size()) {
                String message = "修改架构失败，数据入架构图片关联表失败，服务器忙请稍后再次尝试!";
                log.info("{}", message);
                throw new XiaoShiException(message);
            }
        }

        log.info("修改架构完成");

    }

    /**
     * 分页查询架构树
     *
     * @param structureQueryPageDTO 分页信息
     * @return 返回查询到的数据
     */
    @Override
    public StructureVO query(StructureQueryPageDTO structureQueryPageDTO) {
        log.info("开始处理【查询架构树】的业务，参数为：{}", structureQueryPageDTO);

        //从DTO中取出产品id、架构id、架构名称
        Integer productId = structureQueryPageDTO.getProductId();
        Integer structureId = structureQueryPageDTO.getStructureId();

        StructureVO structureVO = new StructureVO();
        diGui(structureVO, structureId, productId);
        return structureVO;
    }

    /**
     * 查询架构路径和路径架构名称
     *
     * @return 返回查询到的数据
     */
    @Override
    public List<PathStructureNameVO> queryPathStructureName(Integer productId) {
        log.info("开始处理【查询所有架构路径和路径架构名称】的业务");

        List<StructureVO> structures = structureMapper.selectAllByProductId(productId);
        HashMap<String, String> map = new HashMap<>();
        for (StructureVO structure : structures) {
            Integer structureId = structure.getId();
            String structureStrId = structureId + "";
            String structureName = structure.getStructureName();
            map.put(structureStrId, structureName);
        }
        for (StructureVO structure : structures) {
            String path = structure.getPath();
            path = path.substring(path.indexOf(",") + 1);
            String[] split = path.split(",");
            for (String id : split) {
                map.get(id)
            }

        }

        return null;
    }

    /**
     * 删除架构
     *
     * @param id 架构id
     */
    @Override
    public void delete(Integer id) {
        log.info("开始处理【删除架构】的业务，参数为：{}", id);

        //检查尝试删除的数据是否存在
        Structure queryResult = structureMapper.getStandardById(id);
        if (queryResult == null) {
            String message = "删除架构失败，尝试访问的数据已不存在";
            log.info("{}", message);
            throw new XiaoShiException(message);
        }

        //根据架构id查询其所有子级架构
        ArrayList<Integer> structureIds = new ArrayList<>();
        structureIds.add(id);
        String path = queryResult.getPath();
        log.info("根据架构id查询其所有子级架构");
        List<StructureVO> structures = structureMapper.selectByFindInSetPath(path);
        for (StructureVO structure : structures) {
            Integer childStructureId = structure.getId();
            structureIds.add(childStructureId);
        }

        //架构和专利关联表删除数据
        log.info("架构和专利关联表删除数据");
        assoStructurePictureMapper.deleteByIds(structureIds);
//        if (rows != structureIds.size()) {
//            String message = "删除架构失败，架构和专利关联表删除数据失败，服务器忙请稍后再次尝试";
//            log.info("{}", message);
//            throw new XiaoShiException(message);
//        }

        //架构和图片关联表删除数据
        log.info("架构和图片关联表删除数据");
        assoStructurePictureMapper.deleteByStructureIds(structureIds);
//        if (rows != structureIds.size()) {
//            String message = "删除架构失败，架构和图片关联表删除数据失败，服务器忙请稍后再次尝试";
//            log.info("{}", message);
//            throw new XiaoShiException(message);
//        }

        //架构表删除数据
        log.info("架构表删除数据");
        int rows = structureMapper.deleteByIds(structureIds);
        if (rows != structureIds.size()) {
            String message = "删除架构失败，架构表删除数据失败，服务器忙请稍后再次尝试";
            log.info("{}", message);
            throw new XiaoShiException(message);
        }

        log.info("删除架构完成");

    }

    //递归组装架构树集合
    private void diGui(StructureVO structureVO, Integer structureId, Integer productId) {
        List<StructureVO> structureVOs = structureMapper.selectByParentIdAndProductId(structureId, productId);
        if (structureVOs != null) {
            structureVO.setChildren(structureVOs);
            for (StructureVO n : structureVOs) {
                structureId = n.getId();
                diGui(n, structureId, productId);
            }
        }
    }

}