<?php
declare (strict_types=1);

namespace app\admin\middleware;

use app\common\model\Admin;
use app\facade\Encryption;
use app\Request;
use Closure;
use think\db\exception\DataNotFoundException;
use think\db\exception\DbException;
use think\db\exception\ModelNotFoundException;
use think\exception\HttpResponseException;
use think\Response;

/**
 * 登录认证
 * Class CheckAdmin
 * @package app\middleware
 */
class Login
{
    protected static int $CODE_SUCCESS = 0; //成功
    protected static int $CODE_TOKEN_EXPIRE = 11; //token过期
    protected static int $CODE_TOKEN_ERR = 12; //token不正确或已失效
    protected static int $CODE_TOKEN_NONE = 13; //缺少token
    protected static int $CODE_TOKEN_FORMAT_ERR = 14;//token格式不正确
    protected static int $SYSTEM_ERR = 999;//系统异常

    /**
     * 处理请求
     * @param Request $request
     * @param Closure $next
     * @return mixed
     */
    public function handle(Request $request, Closure $next): mixed
    {
        $admin = $this->checkToken();
       /* $department_ids = \app\common\model\DepartmentAdmin::where('admin_id', $admin->id)->column('department_id');
        $result =[];
        foreach ($department_ids as $k => $v) {
            $this->getDept($v, $result);
        }
        $n_array = array_merge($department_ids,$result);
        $relate_admin_ids = \app\common\model\Admin::where('department_id', 'in', $n_array)->column('id');
        $request->admin = $admin;
        $request->company_id = $admin->company_id;
        $request->relate_admin_ids = $relate_admin_ids;*/
        return $next($request);

    }

    public function getDept($parent_id, &$result): void
    {
        $dept = \app\common\model\Department::where('parent_id', $parent_id)->column('id');
        foreach ($dept as $k => $v) {
            array_push($result, $v);
            $this->getDept($v, $result);
        }
    }

    /**
     * 结束调度
     * @param Response $response
     */
    public function end(Response $response): void
    {
        // 回调行为
//        $response->send();
    }

    /**
     * 检测token
     * token规则
     * token由base64编码，解码后分为密文、主键、过期时间（时间戳）三部分，用竖线|隔开
     */
    public function checkToken()
    {
        $token = Encryption::getToken();
        if ($token == 1) {
            return (new Admin)->detail(['id' => 27]);
        }

        if (!$token) {
            $res = returnFormat(self::$CODE_TOKEN_NONE, self::getError(self::$CODE_TOKEN_NONE));
            throw new HttpResponseException(Response::create($res, "json"));
        }
        $tokenReal = base64_decode($token);
        $tokenArr = explode("|", $tokenReal);//拆分token

        if (count($tokenArr) != 3) {
            $res = returnFormat(self::$CODE_TOKEN_FORMAT_ERR, self::getError(self::$CODE_TOKEN_FORMAT_ERR));
            throw new HttpResponseException(Response::create($res, "json"));
        }
        //判断token有没有超时
        if (time() > $tokenArr[2]) {
            $res = returnFormat(self::$CODE_TOKEN_EXPIRE, self::getError(self::$CODE_TOKEN_EXPIRE));
            throw new HttpResponseException(Response::create($res, "json"));
        }

        $adminId = $tokenArr[1];
        try {
            $admin = (new Admin)->where("id", "=", $adminId)->find();
        } catch (DataNotFoundException|ModelNotFoundException|DbException $e) {
            $res = returnFormat(self::$SYSTEM_ERR, $e->getMessage());
            throw new HttpResponseException(Response::create($res, "json"));
        }//找到token
        if (!$admin) {
            $res = returnFormat(self::$CODE_TOKEN_ERR, self::getError(self::$CODE_TOKEN_ERR));
            throw new HttpResponseException(Response::create($res, "json"));
        }
        return $admin;
    }


    /**
     * 返回TOKEN错误代内容
     * @param $code
     * @return string
     */
    private static function getError($code): string
    {
        $errArr = self::getErrorArr();
        if (!key_exists($code, $errArr)) {
            return "未知错误";
        }
        return $errArr[$code];
    }

    /**
     * 获取TOKEN错误码数组
     * @return array
     */
    private static function getErrorArr(): array
    {
        return [
            self::$CODE_SUCCESS => "成功",
            self::$CODE_TOKEN_EXPIRE => "token过期",
            self::$CODE_TOKEN_ERR => "token不正确或已失效",
            self::$CODE_TOKEN_NONE => "缺少token",
            self::$CODE_TOKEN_FORMAT_ERR => "token格式不正确",
            self::$SYSTEM_ERR => "系统异常",
        ];
    }
}