package org.jeecg.modules.system.service.impl;

import java.util.Date;
import java.util.List;

import javax.annotation.Resource;

import org.jeecg.common.constant.CommonConstant;
import org.jeecg.common.exception.JeecgBootException;
import org.jeecg.common.util.oConvertUtils;
import org.jeecg.modules.system.entity.SysPermission;
import org.jeecg.modules.system.entity.SysPermissionDataRule;
import org.jeecg.modules.system.mapper.SysPermissionMapper;
import org.jeecg.modules.system.model.TreeModel;
import org.jeecg.modules.system.service.ISysPermissionDataRuleService;
import org.jeecg.modules.system.service.ISysPermissionService;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;

/**
 * <p>
 * 菜单权限表 服务实现类
 * </p>
 *
 * @author scott
 * @since 2018-12-21
 */
@Service
public class SysPermissionServiceImpl extends ServiceImpl<SysPermissionMapper, SysPermission> implements ISysPermissionService {

	@Resource
	private SysPermissionMapper sysPermissionMapper;
	
	@Resource
	private ISysPermissionDataRuleService permissionDataRuleService;
	
	@Override
	public List<TreeModel> queryListByParentId(String parentId) {
		return sysPermissionMapper.queryListByParentId(parentId);
	}

	/**
	  * 真实删除
	 */
	@Override
	@Transactional
	@CacheEvict(value = "permission",allEntries=true)
	public void deletePermission(String id) throws JeecgBootException {
		SysPermission sysPermission = this.getById(id);
		if(sysPermission==null) {
			throw new JeecgBootException("未找到菜单信息");
		}
		String pid = sysPermission.getParentId();
		int count = this.count(new QueryWrapper<SysPermission>().lambda().eq(SysPermission::getParentId, pid));
		if(count==1) {
			//若父节点无其他子节点，则该父节点是叶子节点
			this.sysPermissionMapper.setMenuLeaf(pid, 1);
		}
		sysPermissionMapper.deleteById(id);
		// 该节点可能是子节点但也可能是其它节点的父节点,所以需要级联删除
		this.removeChildrenBy(sysPermission.getId());
	}
	
	/**
	 * 根据父id删除其关联的子节点数据
	 * 
	 * @return
	 */
	public void removeChildrenBy(String parentId) {
		LambdaQueryWrapper<SysPermission> query = new LambdaQueryWrapper<>();
		// 封装查询条件parentId为主键,
		query.eq(SysPermission::getParentId, parentId);
		// 查出该主键下的所有子级
		List<SysPermission> permissionList = this.list(query);
		if (permissionList != null && permissionList.size() > 0) {
			String id = ""; // id
			int num = 0; // 查出的子级数量
			// 如果查出的集合不为空, 则先删除所有
			this.remove(query);
			// 再遍历刚才查出的集合, 根据每个对象,查找其是否仍有子级
			for (int i = 0, len = permissionList.size(); i < len; i++) {
				id = permissionList.get(i).getId();
				num = this.count(new LambdaQueryWrapper<SysPermission>().eq(SysPermission::getParentId, id));
				// 如果有, 则递归
				if (num > 0) {
					this.removeChildrenBy(id);
				}
			}
		}
	}
	
	/**
	  * 逻辑删除
	 */
	@Override
	@CacheEvict(value = "permission",allEntries=true)
	public void deletePermissionLogical(String id) throws JeecgBootException {
		SysPermission sysPermission = this.getById(id);
		if(sysPermission==null) {
			throw new JeecgBootException("未找到菜单信息");
		}
		String pid = sysPermission.getParentId();
		int count = this.count(new QueryWrapper<SysPermission>().lambda().eq(SysPermission::getParentId, pid));
		if(count==1) {
			//若父节点无其他子节点，则该父节点是叶子节点
			this.sysPermissionMapper.setMenuLeaf(pid, 1);
		}
		sysPermission.setDelFlag(1);
		this.updateById(sysPermission);
	}

	@Override
	@CacheEvict(value = "permission",allEntries=true,condition="#sysPermission.menuType=2")
	public void addPermission(SysPermission sysPermission) throws JeecgBootException {
		//----------------------------------------------------------------------
		//判断是否是一级菜单，是的话清空父菜单
		if(CommonConstant.MENU_TYPE_0.equals(sysPermission.getMenuType())) {
			sysPermission.setParentId(null);
		}
		//----------------------------------------------------------------------
		String pid = sysPermission.getParentId();
		if(oConvertUtils.isNotEmpty(pid)) {
			//设置父节点不为叶子节点
			this.sysPermissionMapper.setMenuLeaf(pid, 0);
		}
		sysPermission.setCreateTime(new Date());
		sysPermission.setDelFlag(0);
		sysPermission.setLeaf(true);
		this.save(sysPermission);
	}

	@Override
	@CacheEvict(value = "permission",allEntries=true,condition="#sysPermission.menuType=2")
	public void editPermission(SysPermission sysPermission) throws JeecgBootException {
		SysPermission p = this.getById(sysPermission.getId());
		//TODO 该节点判断是否还有子节点
		if(p==null) {
			throw new JeecgBootException("未找到菜单信息");
		}else {
			sysPermission.setUpdateTime(new Date());
			//----------------------------------------------------------------------
			//Step1.判断是否是一级菜单，是的话清空父菜单ID
			if(CommonConstant.MENU_TYPE_0.equals(sysPermission.getMenuType())) {
				sysPermission.setParentId("");
			}
			//Step2.判断菜单下级是否有菜单，无则设置为叶子节点
			int count = this.count(new QueryWrapper<SysPermission>().lambda().eq(SysPermission::getParentId, sysPermission.getId()));
			if(count==0) {
				sysPermission.setLeaf(true);
			}
			//----------------------------------------------------------------------
			this.updateById(sysPermission);
			
			//如果当前菜单的父菜单变了，则需要修改新父菜单和老父菜单的，叶子节点状态
			String pid = sysPermission.getParentId();
			if((oConvertUtils.isNotEmpty(pid) && !pid.equals(p.getParentId())) || oConvertUtils.isEmpty(pid)&&oConvertUtils.isNotEmpty(p.getParentId())) {
				//a.设置新的父菜单不为叶子节点
				this.sysPermissionMapper.setMenuLeaf(pid, 0);
				//b.判断老的菜单下是否还有其他子菜单，没有的话则设置为叶子节点
				int cc = this.count(new QueryWrapper<SysPermission>().lambda().eq(SysPermission::getParentId, p.getParentId()));
				if(cc==0) {
					this.sysPermissionMapper.setMenuLeaf(p.getParentId(), 1);
				}
				
			}
		}
		
	}

	@Override
	public List<SysPermission> queryByUser(String username) {
		return this.sysPermissionMapper.queryByUser(username);
	}

	/**
	 * 根据permissionId删除其关联的SysPermissionDataRule表中的数据
	 */
	@Override
	public void deletePermRuleByPermId(String id) {
		LambdaQueryWrapper<SysPermissionDataRule> query = new LambdaQueryWrapper<>();
		query.eq(SysPermissionDataRule::getPermissionId, id);
		int countValue = this.permissionDataRuleService.count(query);
		if(countValue > 0) {
			this.permissionDataRuleService.remove(query);	
		}
	}

	@Override
	@Cacheable(value = "permission")
	public List<String> queryPermissionUrlWithStar() {
		return this.baseMapper.queryPermissionUrlWithStar();
	}

}
