<?php

namespace app\api\controller;

use library\File;
use hg\apidoc\annotation as Apidoc;
use think\Exception;

/**
 * @Apidoc\Title("上传文件")
 * @Apidoc\Group("api")
 * @Apidoc\Sort("3")
 */
class Upload extends Base
{
    protected $id;
    protected $key;
    protected $host;

    public function initialize()
    {
        $this->id = sysconf('storage_oss_keyid');
        $this->key = sysconf('storage_oss_secret');
        $this->host = "https://" . sysconf('storage_oss_domain');
    }

    /**
     * @Apidoc\Title("上传文件接口（上传到本地（导入模板需要））")
     * @Apidoc\Desc("上传文件Desc")
     * @Apidoc\Tag("上传文件Tag")
     * @Apidoc\Method("POST")
     * @Apidoc\Author("上传文件Author")
     * @Apidoc\ParamType("formdata")
     * @Apidoc\Param("file",type="file", require=true,desc="附件")
     * @Apidoc\Returned("url", type="string", desc="上传后的文件路径")
     * @Apidoc\Returned("fullurl", type="string", desc="文件地址")
     * @Apidoc\Returned("name", type="string", desc="文件名称")
     * @Apidoc\Returned("size", type="string", desc="文件大小")
     */
    public function upload()
    {
        $file = $this->request->file('file');
        if (!$file) {
            $this->error('文件上传异常，文件可能过大或未上传！');
        }
        if (!$file->checkExt(strtolower(sysconf('storage_local_exts')))) {
            $this->error('文件上传类型受限，请在后台配置！');
        }
        if ($file->checkExt('php,sh')) {
            $this->error('可执行文件禁止上传到本地服务器！');
        }
        $fileinfo = $file->getInfo();
        $this->safe = boolval(input('safe'));
        $this->uptype = $this->getUploadType();
        $this->extend = pathinfo($file->getInfo('name'), PATHINFO_EXTENSION);
        $subPath = date('Ymd');
        $savePath = $subPath;
        $filename = date('YmdHis') . uniqid();
        $suffix = '.' . $this->extend;
        $realpath = $savePath . '/' . $filename . $suffix;
        try {
            $info = File::instance($this->uptype)->save($realpath, file_get_contents($file->getRealPath()), $this->safe);
        } catch (Exception $e) {
            $this->error($e->getMessage());
        }
        if (is_array($info) && isset($info['url'])) {
            $url = $this->safe ? $realpath : $info['url'];
            $data = [
                'url' => '/' . $info['key'],
                'fullurl' => $info['url'],
                'name' => $fileinfo['name'],
                'size' => $fileinfo['size'],
            ];
            $this->success('上传成功', $data);
        } else {
            $this->error('文件处理失败，请稍候再试！');
        }
    }

    private function getUploadType()
    {
        $this->uptype = input('uptype');
        $this->uptype = 'local';
        if (!in_array($this->uptype, ['local', 'oss', 'qiniu'])) {
            $this->uptype = sysconf('storage_type');
        }
        return $this->uptype;
    }

    /**
     * @Apidoc\Title("获取OSS配置（用于上传文件到OSS使用）")
     * @Apidoc\Desc("获取配置")
     * @Apidoc\Param("type", type="string",require=true, desc="文件要保存的目录名称（需前端创建好）")
     * @Apidoc\Returned("OSSAccessKeyId", type="string", desc="keyId")
     * @Apidoc\Returned("policy", type="string", desc="规则")
     * @Apidoc\Returned("Signature", type="string", desc="签名")
     * @Apidoc\Returned("host", type="string", desc="oss地址")
     * @Apidoc\Returned("expire", type="string", desc="有效截止时间")
     * @Apidoc\Returned("key", type="string", desc="路径（前端生成的目录名称+/）")
     */
    public function getSignedUrl()
    {

        $type = $this->request->get('type', 'image');
        $data = $this->getPolicy($type . '/');
        $this->success('操作成功', $data);
    }

    public function getPolicy($path, $maxSize = 5000000)
    {
        $now = time();
        $expire = 600; //设置该policy超时时间是10s. 即这个policy过了这个有效时间，将不能访问
        $end = $now + $expire;
        $expiration = $this->_gmt_iso8601($end);
        $policy = [
            'expiration' => $expiration,
            'conditions' => [
                ['content-length-range', 1, $maxSize],
                ['starts-with', '$key', $path],
            ]
        ];
        $policy = json_encode($policy);
        $policy = base64_encode($policy);
        $signature = base64_encode(hash_hmac('sha1', $policy, $this->key, true));

        $response = array();
        $response['OSSAccessKeyId'] = $this->id;
        $response['policy'] = $policy;
        $response['Signature'] = $signature;
        $response['host'] = $this->host;
        $response['expire'] = $end;
        $response['success_action_status'] = 200;
        //这个参数是设置用户上传指定的前缀
        $response['key'] = $path;
        return $response;
    }

    protected function _gmt_iso8601($time)
    {
        $dtStr = date("c", $time);
        $mydatetime = new \DateTime($dtStr);
        $expiration = $mydatetime->format(\DateTime::ISO8601);
        $pos = strpos($expiration, '+');
        $expiration = substr($expiration, 0, $pos);
        return $expiration . "Z";
    }

}