package com.xiaopeng.account.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.xiaopeng.account.mapper.SysGroupMenuMapper;
import com.xiaopeng.account.service.ISysGroupMenuService;
import com.xiaopeng.api.model.account.SysGroupMenu;
import org.springframework.stereotype.Service;

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

/**
 * <p>
 * 角色和菜单关联表 服务实现类
 * </p>
 *
 * @author mitao
 * @since 2026-02-03
 */
@Service
public class SysGroupMenuServiceImpl extends ServiceImpl<SysGroupMenuMapper, SysGroupMenu> implements ISysGroupMenuService {

    /**
     * 根据权限组ID查询菜单ID列表
     *
     * @param groupId 权限组ID
     * @return 菜单ID列表
     */
    @Override
    public List<Long> selectMenuIdsByGroupId(Long groupId) {
        if (groupId == null) {
            return new ArrayList<>();
        }

        // 使用 MyBatis-Plus 的 LambdaQueryWrapper 查询
        LambdaQueryWrapper<SysGroupMenu> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(SysGroupMenu::getGroupId, groupId);

        List<SysGroupMenu> groupMenus = this.list(queryWrapper);

        return groupMenus.stream()
                .map(SysGroupMenu::getMenuId)
                .filter(Objects::nonNull)
                .collect(Collectors.toList());
    }

    /**
     * 批量保存权限组菜单关联
     *
     * @param groupId 权限组ID
     * @param menuIds 菜单ID列表
     */
    @Override
    public void saveGroupMenus(Long groupId, List<Long> menuIds) {
        if (groupId == null || menuIds == null || menuIds.isEmpty()) {
            return;
        }

        List<SysGroupMenu> list = this.list(new LambdaQueryWrapper<SysGroupMenu>().eq(SysGroupMenu::getGroupId, groupId));
        List<Long> deleteMenuIds = new ArrayList<>();
        List<Long> addMenuIds = new ArrayList<>();
        //查找需要删除的数据
        for (SysGroupMenu sysGroupMenu : list) {
            if(!menuIds.contains(sysGroupMenu.getMenuId())){
                deleteMenuIds.add(sysGroupMenu.getMenuId());
            }
        }
        //查找需要添加的数据
        List<Long> collect = list.stream().map(SysGroupMenu::getMenuId).collect(Collectors.toList());
        for (Long menuId : menuIds) {
            if(!collect.contains(menuId)){
                addMenuIds.add(menuId);
            }
        }

        // 构建批量插入的数据
        List<SysGroupMenu> groupMenus = addMenuIds.stream()
                .filter(Objects::nonNull)
                .map(menuId -> {
                    SysGroupMenu groupMenu = new SysGroupMenu();
                    groupMenu.setGroupId(groupId);
                    groupMenu.setMenuId(menuId);
                    return groupMenu;
                })
                .collect(Collectors.toList());

        // 批量保存
        if (!groupMenus.isEmpty()) {
            this.saveBatch(groupMenus);
        }
        if(!deleteMenuIds.isEmpty()){
            this.remove(new LambdaQueryWrapper<SysGroupMenu>().eq(SysGroupMenu::getGroupId, groupId).in(SysGroupMenu::getMenuId, deleteMenuIds));
        }
    }

    /**
     * 删除权限组的所有菜单关联
     *
     * @param groupId 权限组ID
     */
    @Override
    public void deleteByGroupId(Long groupId) {
        if (groupId == null) {
            return;
        }

        // 使用 MyBatis-Plus 的 LambdaQueryWrapper 删除
        LambdaQueryWrapper<SysGroupMenu> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(SysGroupMenu::getGroupId, groupId);

        this.remove(queryWrapper);
    }
}