/*
 *  Copyright 2019-2020 Zheng Jie
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package admin.modules.system.service.impl;

import admin.base.PageInfo;
import admin.base.QueryHelpMybatisPlus;
import admin.base.impl.CommonServiceImpl;
import admin.exception.BadRequestException;
import admin.exception.EntityExistException;
import admin.modules.security.service.UserCacheClean;
import admin.modules.system.domain.*;
import admin.modules.system.service.RoleService;
import admin.modules.system.service.SysRolesDeptsService;
import admin.modules.system.service.SysRolesMenusService;
import admin.modules.system.service.dto.RoleDto;
import admin.modules.system.service.dto.RoleQueryCriteria;
import admin.modules.system.service.dto.RoleSmallDto;
import admin.modules.system.service.dto.UserDto;
import admin.modules.system.service.mapper.*;
import admin.utils.*;
import cn.hutool.core.collection.CollectionUtil;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.toolkit.CollectionUtils;
import lombok.RequiredArgsConstructor;
import org.springframework.cache.annotation.CacheConfig;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.data.domain.Pageable;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.*;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * @date 2018-12-03
 */
@Service
@RequiredArgsConstructor
@CacheConfig(cacheNames = "role")
public class RoleServiceImpl extends CommonServiceImpl<RoleMapper, Role> implements RoleService {

    private final RoleMapper roleMapper;
    private final MenuMapper menuMapper;
    private final DeptMapper deptMapper;
    private final RedisUtils redisUtils;
    private final UserMapper userMapper;
    private final SysRolesDeptsService sysRolesDeptsService;
    private final SysRolesDeptsMapper sysRolesDeptsMapper;
    private final SysRolesMenusService sysRolesMenusService;
    private final SysRolesMenusMapper sysRolesMenusMapper;
    private final UserCacheClean userCacheClean;

    @Override
    public List<RoleDto> queryAll() {
        Object object = redisUtils.get(CacheKey.ROLE_ALL);
        List<RoleDto> roleDtos = null;
        if(object==null){
            QueryWrapper<Role> queryWrapper = new QueryWrapper<>();
            queryWrapper.orderByAsc("level");
            List<Role> roles = roleMapper.selectList(queryWrapper);
            roles.forEach(role -> {
                role.setMenus(menuMapper.findMenuByRoleId(role.getId()));
                role.setDepts(deptMapper.findByRoleId(role.getId()));
            });
            roleDtos = ConvertUtil.convertList(roles, RoleDto.class);
            redisUtils.set(CacheKey.ROLE_ALL,roleDtos,2, TimeUnit.HOURS);
        }else{
            roleDtos = (List<RoleDto>) object;
        }
        return roleDtos;
    }

    @Override
    public List<RoleDto> queryAll(RoleQueryCriteria criteria) {
        List<Role> roles = roleMapper.selectList(QueryHelpMybatisPlus.getPredicate(criteria));
        roles.forEach(role -> {
            role.setMenus(menuMapper.findMenuByRoleId(role.getId()));
            role.setDepts(deptMapper.findByRoleId(role.getId()));
        });
        return ConvertUtil.convertList(roles, RoleDto.class);
    }

    @Override
    public PageInfo<RoleDto> queryAll(RoleQueryCriteria criteria, Pageable pageable) {
        IPage<Role> page = PageUtil.toMybatisPage(pageable, false);
        IPage<Role> pageList = roleMapper.selectPage(page, QueryHelpMybatisPlus.getPredicate(criteria));
        pageList.getRecords().forEach(role -> {
            role.setMenus(menuMapper.findMenuByRoleId(role.getId()));
            role.setDepts(deptMapper.findByRoleId(role.getId()));
        });
        return ConvertUtil.convertPage(pageList, RoleDto.class);

    }

    @Override
    @Cacheable(key = "'id:' + #p0")
    @Transactional(rollbackFor = Exception.class)
    public RoleDto findById(long id) {
        Role role = roleMapper.selectById(id);
        ValidationUtil.isNull(role.getId(), "Role", "id", id);
        role.setMenus(menuMapper.findMenuByRoleId(role.getId()));
        role.setDepts(deptMapper.findByRoleId(role.getId()));
        RoleDto convert = ConvertUtil.convert(role, RoleDto.class);
        return convert;
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void create(Role resources) {
        if (roleMapper.findByName(resources.getName()) != null) {
            throw new EntityExistException(Role.class, "username", resources.getName());
        }
        roleMapper.insert(resources);
        if (resources.getDepts() != null) {
            resources.getDepts().forEach(dept -> {
                SysRolesDepts rd = new SysRolesDepts();
                rd.setRoleId(resources.getId());
                rd.setDeptId(dept.getId());
                sysRolesDeptsMapper.insert(rd);
            });
        }
        delAllRoleCaches();
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void update(Role resources) {
        Role role = roleMapper.selectById(resources.getId());
        ValidationUtil.isNull(role.getId(), "Role", "id", resources.getId());

        Role role1 = roleMapper.findByName(resources.getName());

        if (role1 != null && !role1.getId().equals(role.getId())) {
            throw new EntityExistException(Role.class, "username", resources.getName());
        }
        role.setName(resources.getName());
        role.setDescription(resources.getDescription());
        role.setDataScope(resources.getDataScope());
        role.setDepts(resources.getDepts());
        role.setLevel(resources.getLevel());
        roleMapper.updateById(role);
        sysRolesDeptsService.removeByRoleId(resources.getId());
        if (resources.getDepts() != null) {
            resources.getDepts().forEach(dept -> {
                SysRolesDepts rd = new SysRolesDepts();
                rd.setRoleId(resources.getId());
                rd.setDeptId(dept.getId());
                sysRolesDeptsMapper.insert(rd);
            });
        }
        // 更新相关缓存
        delCaches(role.getId(), null);
        delAllRoleCaches();
    }

    @Override
    public void updateMenu(Role resources, RoleDto roleDTO) {
        Role role = ConvertUtil.convert(roleDTO, Role.class);
        List<User> users = userMapper.findByRoleId(role.getId());
        // 更新菜单
        role.setMenus(resources.getMenus());

        SysRolesMenus rm = new SysRolesMenus();
        List<Long> oldMenuIds = sysRolesMenusService.queryMenuIdByRoleId(resources.getId());
        List<Long> menuIds = resources.getMenus().stream().map(Menu::getId).collect(Collectors.toList());
        List<Long> deleteList = oldMenuIds.stream().filter(item -> !menuIds.contains(item))
                .collect(Collectors.toList());
        List<Long> addList = menuIds.stream().filter(item -> !oldMenuIds.contains(item)).collect(Collectors.toList());
        if (CollectionUtils.isNotEmpty(deleteList)) {
            sysRolesMenusService.lambdaUpdate()
                    .eq(SysRolesMenus::getRoleId, resources.getId())
                    .in(SysRolesMenus::getMenuId, deleteList).remove();
        }
        addList.forEach(item -> {
            rm.setMenuId(item);
            rm.setRoleId(resources.getId());
            sysRolesMenusMapper.insert(rm);
        });

        delCaches(resources.getId(), users);
        delAllRoleCaches();
        roleMapper.updateById(role);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void untiedMenu(Long menuId) {
        // 更新菜单
        roleMapper.untiedMenu(menuId);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void delete(Set<Long> ids) {
        for (Long id : ids) {
            // 更新相关缓存
            delCaches(id, null);
        }
        delAllRoleCaches();
        roleMapper.deleteAllByIdIn(ids);
    }

    @Override
    public List<RoleSmallDto> findByUsersId(Long id) {
        return ConvertUtil.convertList(new ArrayList<>(roleMapper.findByUserId(id)), RoleSmallDto.class);
    }

    @Override
    public Integer findByRoles(Set<Role> roles) {
        Set<RoleDto> roleDtos = new HashSet<>();
        for (Role role : roles) {
            roleDtos.add(findById(role.getId()));
        }
        return Collections.min(roleDtos.stream().map(RoleDto::getLevel).collect(Collectors.toList()));
    }

    @Override
    @Cacheable(key = "'auth:' + #p0.id")
    public List<GrantedAuthority> mapToGrantedAuthorities(UserDto user) {
        Set<String> permissions = new HashSet<>();
        // 如果是管理员直接返回
        if (user.getIsAdmin()) {
            permissions.add("admin");
            return permissions.stream().map(SimpleGrantedAuthority::new)
                    .collect(Collectors.toList());
        }
        Set<Role> roles = roleMapper.findByUserId(user.getId());
        permissions = roles.stream().flatMap(role -> role.getMenus().stream())
                .filter(menu -> StringUtils.isNotBlank(menu.getPermission()))
                .map(Menu::getPermission).collect(Collectors.toSet());
        return permissions.stream().map(SimpleGrantedAuthority::new)
                .collect(Collectors.toList());
    }

    @Override
    public void download(List<RoleDto> roles, HttpServletResponse response) throws IOException {
        List<Map<String, Object>> list = new ArrayList<>();
        for (RoleDto role : roles) {
            Map<String, Object> map = new LinkedHashMap<>();
            map.put("角色名称", role.getName());
            map.put("角色级别", role.getLevel());
            map.put("描述", role.getDescription());
            map.put("创建日期", role.getCreateTime());
            list.add(map);
        }
        FileUtil.downloadExcel(list, response);
    }

    @Override
    public void verification(Set<Long> ids) {
        if (userMapper.countByRoles(ids) > 0) {
            throw new BadRequestException("所选角色存在用户关联，请解除关联再试！");
        }
    }

    @Override
    public List<Role> findInMenuId(List<Long> menuIds) {
        return roleMapper.findInMenuId(menuIds);
    }

    /**
     * 清理缓存
     * @param id /
     */
    public void delCaches(Long id, List<User> users) {
        users = CollectionUtil.isEmpty(users) ? userMapper.findByRoleId(id) : users;
        if (CollectionUtil.isNotEmpty(users)) {
            users.forEach(item -> userCacheClean.cleanUserCache(item.getUsername()));
            Set<Long> userIds = users.stream().map(User::getId).collect(Collectors.toSet());
            redisUtils.delByKeys(CacheKey.DATE_USER, userIds);
            redisUtils.delByKeys(CacheKey.MENU_USER, userIds);
            redisUtils.delByKeys(CacheKey.ROLE_AUTH, userIds);
            redisUtils.del(CacheKey.ROLE_ID + id);
        }

    }

    /**
     * 清理所有角色信息缓存
     */
    public void delAllRoleCaches(){
        redisUtils.del(CacheKey.ROLE_ALL);
    }
}