<?php

namespace base\common\service;

use app\admin\model\SystemAuthNode;
use app\admin\service\NodeService;
use app\common\constants\AdminConstant;
use think\facade\Cache;
use think\facade\Config;
use think\facade\Db;

/**
 * 权限验证服务
 * Class AuthService.
 */
class AuthServiceBase
{
    /**
     * 用户ID.
     * @var null
     */
    protected $adminId = null;

    /**
     * 默认配置.
     * @var array
     */
    protected $config = [
        'auth_on' => true,              // 权限开关
        'system_admin' => 'system_admin',    // 用户表
        'system_auth' => 'system_auth',     // 权限表
        'system_auth_node' => 'system_auth_node', // 权限-节点表
    ];

    /**
     * 管理员信息.
     * @var array|\think\Model|null
     */
    protected $adminInfo;

    /**
     * 所有节点信息.
     * @var array
     */
    protected $nodeList;

    /**
     * 管理员所有授权节点.
     * @var array
     */
    protected $adminNode;

    protected $nodeService;

    protected static $dynamicNodeList = [];

    /***
     * 构造方法
     * AuthService constructor.
     * @param null $adminId
     * @throws \think\db\exception\DataNotFoundException
     * @throws \think\db\exception\DbException
     * @throws \think\db\exception\ModelNotFoundException
     */
    public function __construct($adminId = null)
    {
        $this->nodeService = new NodeService();

        if(empty($adminId)){
            $adminId = get_session_admin('id');
        }
        $this->adminId = $adminId;
        $this->adminInfo = $this->getAdminInfo();
        $this->nodeList = $this->getNodeList();
        $this->adminNode = $this->getAdminNode();

        return $this;
    }

    public function isSuperAdmin()
    {
        return $this->adminId == AdminConstant::SUPER_ADMIN_ID;
    }

    /**
     * 检测检测权限.
     * @param null $node
     * @return bool
     * @throws \think\db\exception\DataNotFoundException
     * @throws \think\db\exception\DbException
     * @throws \think\db\exception\ModelNotFoundException
     */
    public function checkNode($node = null)
    {
        if(isset(static::$dynamicNodeList[$node])){
            return static::$dynamicNodeList[$node];
        }

        // 判断是否为超级管理员
        if ($this->isSuperAdmin()) {
            return true;
        }
        // 判断权限验证开关
        if ($this->config['auth_on'] == false) {
            return true;
        }
        // 判断是否需要获取当前节点
        if (empty($node)) {
            $node = $this->getCurrentNode();
        } else {
            $node = $this->parseNodeStr($node);
        }

        // 判断是否加入节点控制，优先获取缓存信息
        if (!isset($this->nodeList[$node])) {
            return Config::get('admin.default_auth_check');
        }
        $nodeInfo = $this->nodeList[$node];
        if (!$nodeInfo['auth']) {
            return true;
        }
        // 用户验证，优先获取缓存信息
        if (empty($this->adminInfo) || $this->adminInfo['status'] != 1 || empty($this->adminInfo['auth_ids'])) {
            return false;
        }
        // 判断该节点是否允许访问
        if (in_array($node, $this->adminNode)) {
            return true;
        }

        return false;
    }

    /**
     * 获取当前节点.
     * @return string
     */
    public function getCurrentNode()
    {
        $node = $this->parseNodeStr(request()->controller() . '/' . request()->action());

        return $node;
    }

    /**
     * 获取当前管理员所有节点.
     * @return array
     * @throws \think\db\exception\DataNotFoundException
     * @throws \think\db\exception\DbException
     * @throws \think\db\exception\ModelNotFoundException
     */
    public function getAdminNode()
    {
        $nodeList = [];
        $adminInfo = $this->getAdminInfo();

        if (!empty($adminInfo) && $adminInfo['status'] != 1) {
            return $nodeList;
        }

        if (!empty($adminInfo) && !empty($adminInfo['auth_ids'])) {
            $nodeList = SystemAuthNode::where('auth_id', 'in', $adminInfo['auth_ids'])->cache(60)->column('node');
        }

        return $nodeList;
    }

    /**
     * 获取所有节点信息.
     * @time 2021-01-07
     * @return array
     * @author zhongshaofa <shaofa.zhong@happy-seed.com>
     */
    public function getNodeList()
    {
        $cache_key = 'node_paris';

        $node_list = Cache::get($cache_key);
        if (!$node_list) {
            $node_list = $this->nodeService->getNodeParis();
            Cache::set($cache_key, $node_list, 60);
        }        

        return $node_list;
    }

    /**
     * 获取管理员信息.
     * @time 2021-01-07
     * @return array|\think\Model|null
     * @throws \think\db\exception\DataNotFoundException
     * @throws \think\db\exception\DbException
     * @throws \think\db\exception\ModelNotFoundException
     * @author zhongshaofa <shaofa.zhong@happy-seed.com>
     */
    public function getAdminInfo()
    {
        return  Db::name($this->config['system_admin'])
            ->where('id', $this->adminId)
            ->autoCache('info', $this->adminId)
            ->find();
    }

    /**
     * 驼峰转下划线规则.
     * @param string $node
     * @return string
     */
    public function parseNodeStr($node)
    {
        $array = explode('/', $node);
        foreach ($array as $key => $val) {
            if ($key == 0) {
                $val = explode('.', $val);
                foreach ($val as &$vo) {
                    $vo = \think\helper\Str::snake(lcfirst($vo));
                }
                $val = implode('.', $val);
                $array[$key] = $val;
            }
        }
        $node = implode('/', $array);

        return $node;
    }

    public function disableNode($node, $skipSuperAdmin = true) 
    {
        if($this->isSuperAdmin()){
            if($skipSuperAdmin){
                return;
            }
        }
        static::$dynamicNodeList[$node] = false;
    }

    public function enableNode($node)
    {
        static::$dynamicNodeList[$node] = true;
    }
}