package com.isu.gaswellwatch.service.impl;

import cn.hutool.core.collection.CollectionUtil;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.isu.gaswellwatch.config.SnowflakeConfig;
import com.isu.gaswellwatch.constants.UserConstant;
import com.isu.gaswellwatch.dao.RoleDao;
import com.isu.gaswellwatch.dto.RoleDTO;
import com.isu.gaswellwatch.dto.RoleEditDTO;
import com.isu.gaswellwatch.dto.RoleMenuDTO;
import com.isu.gaswellwatch.entity.Role;
import com.isu.gaswellwatch.entity.RoleMenu;
import com.isu.gaswellwatch.entity.UserRole;
import com.isu.gaswellwatch.exception.BusinessException;
import com.isu.gaswellwatch.service.RoleMenuService;
import com.isu.gaswellwatch.service.RoleService;
import com.isu.gaswellwatch.service.UserRoleService;
import com.isu.gaswellwatch.utils.ConverterUtil;
import com.isu.gaswellwatch.vo.RoleVO;
import jakarta.annotation.Resource;
import org.apache.commons.lang3.StringUtils;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

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

@Service("roleService")
@Transactional(rollbackFor = Exception.class)
public class RoleServiceImpl extends ServiceImpl<RoleDao, Role> implements RoleService {

    @Resource
    private SnowflakeConfig snowflakeConfig;

    @Resource
    private RoleMenuService roleMenuService;

    @Resource
    private UserRoleService userRoleService;

    @Override
    public Page<Role> page(Integer currentPage, Integer pageSize, String name){
        return page(new Page<>(currentPage, pageSize), new LambdaQueryWrapper<Role>().like(StringUtils.isNotBlank(name), Role::getName, name).orderByDesc(Role::getCreateTime));
    }

    @Override
    public void add(RoleDTO roleDTO){
        //查重
        List<Role> list = list(new LambdaQueryWrapper<Role>().eq(Role::getName, roleDTO.getName()));
        if(CollectionUtil.isNotEmpty(list)) {
            throw new BusinessException("已有角色，请重新输入");
        }
        Long roleId = snowflakeConfig.snowflakeId();
        save(Role.builder().id(roleId).name(roleDTO.getName()).description(roleDTO.getDescription()).build());
        //关联
        addRelation(roleDTO.getRoleMenuDTOList(), roleId);
    }

    @Override
    public void edit(RoleEditDTO roleEditDTO){
        List<Role> list = list(new LambdaQueryWrapper<Role>().eq(Role::getName, roleEditDTO.getName()).ne(Role::getId, roleEditDTO.getId()));
        if(CollectionUtil.isNotEmpty(list)) {
            throw new BusinessException("角色名称已存在，请重新输入");
        }
        updateById(ConverterUtil.convert(roleEditDTO, Role.class));
        //关联
        roleMenuService.remove(new LambdaQueryWrapper<RoleMenu>().eq(RoleMenu::getRoleId,roleEditDTO.getId()));
        addRelation(roleEditDTO.getRoleMenuDTOList(), roleEditDTO.getId());
    }

    @Override
    public void delete(Long id){
        //如果角色绑定了用户  不能删除
        List<UserRole> list = userRoleService.list(new LambdaQueryWrapper<UserRole>().eq(UserRole::getRoleId, id));
        if(CollectionUtil.isNotEmpty(list)) {
            throw new BusinessException("该角色已和用户绑定，不能删除");
        }
        //如果是超管角色  不能删除
        if(Objects.equals(id, UserConstant.SUPER_ADMIN_ID)) {
            throw new BusinessException("该角色为超管角色，不能删除");
        }
        //删除
        removeById(id);
        roleMenuService.remove(new LambdaQueryWrapper<RoleMenu>().eq(RoleMenu::getRoleId,id));
    }


    private void addRelation(List<RoleMenuDTO> roleMenuDTOList, Long roleId) {
        if(!CollectionUtil.isEmpty(roleMenuDTOList)){
            List<RoleMenu> roleMenus = new ArrayList<>();
            roleMenuDTOList.forEach(roleMenuDTO -> {
                if(CollectionUtil.isEmpty(roleMenuDTO.getIdentifier())){
                    roleMenus.add(RoleMenu.builder().id(snowflakeConfig.snowflakeId()).roleId(roleId).menuId(roleMenuDTO.getMenuId()).build());
                }else {
                    roleMenuDTO.getIdentifier().forEach(identifier -> {
                        roleMenus.add(RoleMenu.builder().id(snowflakeConfig.snowflakeId()).roleId(roleId).menuId(roleMenuDTO.getMenuId()).identifier(identifier).build());
                    });
                }
            });
            roleMenuService.saveBatch(roleMenus);
        }
    }
}