package com.mes.menu.service.impl;

import cn.hutool.json.JSONUtil;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.mes.menu.entity.SysMenu;
import com.mes.menu.mapper.SysMenuMapper;
import com.mes.menu.service.SysMenuService;
import com.mes.userinfo.entity.SysUser;
import com.mes.userinfo.mapper.SysUserMapper;
import com.mes.userinfo.service.SysUserService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

/**
 * <p>
 * 菜单表 服务实现类
 * </p>
 *
 * @author zhoush
 * @since 2024-04-11
 */
@Service
@Slf4j
public class SysMenuServiceImpl extends ServiceImpl<SysMenuMapper, SysMenu> implements SysMenuService {

    @Autowired
    SysUserService sysUserService;

    @Override
    public List<SysMenu> getMenuTree() {
        //todo:需要先获取用户的角色，角色下的菜单权限，拿到菜单id获取所有菜单
        List<SysMenu> menuList = this.baseMapper.selectList(null);
        return create(menuList);
    }

    @Override
    public List<String> getAuthorityInfo(String userName) {
        SysUser sysUser = sysUserService.listByUserName(userName);

        // 获取权限信息
        String authorityInfo = sysUserService.getUserAuthorityInfo(sysUser.getId());// ROLE_admin,ROLE_normal,sys:user:list,....
        String[] authorityInfoArray = StringUtils.tokenizeToStringArray(authorityInfo, ",");
    }


    /**
     * 将数据库中查询出来的list集合传入此方法即可获得排成树形结构的list集合
     *
     * @param lists
     * @return
     */
    public List<SysMenu> create(List<SysMenu> lists) {
        List<SysMenu> deptTreeList = lists.stream()
                .filter(item -> item.getParentId() == 0)
                .map(item -> {
                    item.setChildren(getChildren(item, lists));
                    return item;
                }).collect(Collectors.toList());
        return deptTreeList;
    }

    /**
     * 此方法将被递归调用
     *
     * @param menu
     * @param menus
     * @return
     */
    private List<SysMenu> getChildren(SysMenu menu, List<SysMenu> menus) {
        List<SysMenu> res = menus.stream()
                .filter(item -> item.getParentId().equals(menu.getId()))
                .map(item -> {
                    item.setChildren(getChildren(item, menus));
                    return item;
                }).collect(Collectors.toList());
        log.info("菜单树:{}", JSONUtil.toJsonStr(res));
        return res;
    }


    @Autowired
    SysUserMapper sysUserMapper;

    @Override
    public List<SysMenuDto> getCurrentUserNav() {
        String username = (String) SecurityContextHolder.getContext().getAuthentication().getPrincipal();
        SysUser sysUser = sysUserService.getByUsername(username);

        List<Long> menuIds = sysUserMapper.getNavMenuIds(sysUser.getId());
        List<SysMenu> menus = this.listByIds(menuIds);

        // 转树状结构
        List<SysMenu> menuTree = buildTreeMenu(menus);

        // 实体转DTO
        return convert(menuTree);
    }

    @Override
    public List<SysMenu> tree() {
        // 获取所有菜单信息
        List<SysMenu> sysMenus = this.list(new QueryWrapper<SysMenu>().orderByAsc("orderNum"));

        // 转成树状结构
        return buildTreeMenu(sysMenus);
    }

    private List<SysMenuDto> convert(List<SysMenu> menuTree) {
        List<SysMenuDto> menuDtos = new ArrayList<>();

        menuTree.forEach(m -> {
            SysMenuDto dto = new SysMenuDto();

            dto.setId(m.getId());
            dto.setName(m.getPerms());
            dto.setTitle(m.getName());
            dto.setComponent(m.getComponent());
            dto.setPath(m.getPath());

            if (m.getChildren().size() > 0) {

                // 子节点调用当前方法进行再次转换
                dto.setChildren(convert(m.getChildren()));
            }

            menuDtos.add(dto);
        });

        return menuDtos;
    }

    private List<SysMenu> buildTreeMenu(List<SysMenu> menus) {

        List<SysMenu> finalMenus = new ArrayList<>();

        // 先各自寻找到各自的孩子
        for (SysMenu menu : menus) {

            for (SysMenu e : menus) {
                if (menu.getId() == e.getParentId()) {
                    menu.getChildren().add(e);
                }
            }

            // 提取出父节点
            if (menu.getParentId() == 0L) {
                finalMenus.add(menu);
            }
        }

        System.out.println(JSONUtil.toJsonStr(finalMenus));
        return finalMenus;
    }

}