<?php

namespace app\common\controller;

use app\common\library\Auth;
use think\Config;
use think\exception\HttpResponseException;
use think\exception\ValidateException;
use think\Hook;
use think\Lang;
use think\Loader;
use think\Paginator;
use think\Request;
use think\Response;
use think\Route;
use think\Validate;

/**
 * API控制器基类
 */
class Api
{

    /**
     * @var Request Request 实例
     */
    protected $request;

    /**
     * @var array 前置操作方法列表
     */
    protected array $beforeActionList = [];

    /**
     * 无需登录的方法,同时也就不需要鉴权了
     * @var array
     */
    protected array $noNeedLogin = [];

    /**
     * 权限Auth
     * @var Auth
     */
    protected Auth $auth;

    /**
     * 默认响应输出类型,支持json/xml
     * @var string
     */
    protected string $responseType = 'json';

    /**
     * 每页条数
     * @var int
     */
    protected int $pageSize = 10;

    /**
     * 构造方法
     * @param Request|null $request
     */
    public function __construct(Request $request = null)
    {
        $this->request = is_null($request) ? Request::instance() : $request;

        // 控制器初始化
        $this->_initialize();

        // 前置操作方法
        if ($this->beforeActionList) {
            foreach ($this->beforeActionList as $method => $options) {
                is_numeric($method) ?
                    $this->beforeAction($options) :
                    $this->beforeAction($method, $options);
            }
        }
    }

    /**
     * 初始化操作
     * @access protected
     */
    protected function _initialize()
    {
        //跨域请求检测
        check_cors_request();

        // 检测IP是否允许
        check_ip_allowed();

        //移除HTML标签
        $this->request->filter('trim,strip_tags,htmlspecialchars');

        $this->auth = Auth::instance();

        $controllername = Loader::parseName($this->request->controller());
        $actionname     = strtolower($this->request->action());

        // 请求头里的加密过的token
        $token = $this->request->header("Token", "");
        $path = str_replace('.', '/', $controllername) . '/' . $actionname;
        // 设置当前请求的URI
        $this->auth->setRequestUri($path);
        // 检测是否需要验证登录
        if (!$this->auth->match($this->noNeedLogin)) {
            //初始化
            $this->auth->init($token);
            //检测是否登录
            if (!$this->auth->isLogin()) {
                $this->error(__('Please login first'), null,14999); // 未登录时,返回特定的code
            }
        }

        $upload = \app\common\model\Config::upload();

        // 上传信息配置后
        Hook::listen("upload_config_init", $upload);

        Config::set('upload', array_merge(Config::get('upload'), $upload));

        // 加载当前控制器语言包
        $this->loadlang($controllername);
    }

    /**
     * 加载语言文件
     * @param string $name
     */
    protected function loadlang($name)
    {
        $name = Loader::parseName($name);
        $name = preg_match("/^([a-zA-Z0-9_\.\/]+)\$/i", $name) ? $name : 'index';
        $lang = $this->request->langset();
        $lang = preg_match("/^([a-zA-Z\-_]{2,10})\$/i", $lang) ? $lang : 'zh-cn';
        Lang::load(APP_PATH . $this->request->module() . '/lang/' . $lang . '/' . str_replace('.', '/', $name) . '.php');
    }

    /**
     * 操作成功返回的数据
     * @param string $msg 提示信息
     * @param mixed $data 要返回的数据
     * @param int $code 错误码，默认为1
     * @param string|null $type 输出类型
     * @param array $header 发送的 Header 信息
     */
    protected function success(string $msg = '', $data = null, int $code = 200, string $type = null, array $header = [])
    {
        if (empty($msg)) {
            $msg = "操作成功";
        }
        $this->result($msg, $data, $code, $type, $header);
    }

    /**
     * 操作失败返回的数据
     * @param string $msg 提示信息
     * @param mixed $data 要返回的数据
     * @param int $code 错误码，默认为0
     * @param string|null $type 输出类型
     * @param array $header 发送的 Header 信息
     */
    protected function error(string $msg = '', $data = null, int $code = 15000, string $type = null, array $header = [])
    {
        if (empty($msg)) {
            $msg = "操作失败";
        }
        $this->result($msg, $data, $code, $type, $header);
    }

    /**
     * 返回封装后的 API 数据到客户端
     * @access protected
     * @param mixed $msg 提示信息
     * @param mixed $data 要返回的数据
     * @param int $code 错误码，默认为0
     * @param string|null $type 输出类型，支持json/xml/jsonp
     * @param array $header 发送的 Header 信息
     * @return void
     * @throws HttpResponseException
     */
    protected function result($msg, $data = null, int $code = 0, string $type = null, array $header = [])
    {
        $result = [
            'code' => $code,
            'msg'  => $msg,
            'time' => Request::instance()->server('REQUEST_TIME'),
            'data' => $data,
        ];
        // 如果未设置类型则自动判断
        $type = $type ? $type : ($this->request->param(config('var_jsonp_handler')) ? 'jsonp' : $this->responseType);

        if (isset($header['statuscode'])) {
            $code = $header['statuscode'];
            unset($header['statuscode']);
        } else {
            //未设置状态码,根据code值判断
            $code = $code >= 1000 || $code < 200 ? 200 : $code;
        }
        $response = Response::create($result, $type, $code)->header($header);
        throw new HttpResponseException($response);
    }

    /**
     * 前置操作
     * @access protected
     * @param string $method 前置操作方法名
     * @param array $options 调用参数 ['only'=>[...]] 或者 ['except'=>[...]]
     * @return void
     */
    protected function beforeAction(string $method, array $options = [])
    {
        if (isset($options['only'])) {
            if (is_string($options['only'])) {
                $options['only'] = explode(',', $options['only']);
            }

            if (!in_array($this->request->action(), $options['only'])) {
                return;
            }
        } elseif (isset($options['except'])) {
            if (is_string($options['except'])) {
                $options['except'] = explode(',', $options['except']);
            }

            if (in_array($this->request->action(), $options['except'])) {
                return;
            }
        }

        call_user_func([$this, $method]);
    }

    /**
     * 构造分页的相应
     * @param Paginator $paginator
     * @return array
     */
    protected function buildResp(int $total, int $currentPage, array $rows): array
    {
        return [
            'total'        => $total,
            'current_page' => $currentPage,
            'rows'         => $rows,
        ];
    }

}