<?php

/*
 * Copyright 2015 Google Inc.
 *
 * 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.
 */
namespace Mihdan\IndexNow\Dependencies\Google\Auth\Credentials;

use Mihdan\IndexNow\Dependencies\Google\Auth\CredentialsLoader;
use Mihdan\IndexNow\Dependencies\Google\Auth\GetQuotaProjectInterface;
use Mihdan\IndexNow\Dependencies\Google\Auth\OAuth2;
/**
 * Authenticates requests using User Refresh credentials.
 *
 * This class allows authorizing requests from user refresh tokens.
 *
 * This the end of the result of a 3LO flow.  E.g, the end result of
 * 'gcloud auth login' saves a file with these contents in well known
 * location
 *
 * @see [Application Default Credentials](http://goo.gl/mkAHpZ)
 * @internal
 */
class UserRefreshCredentials extends CredentialsLoader implements GetQuotaProjectInterface
{
    /**
     * Used in observability metric headers
     *
     * @var string
     */
    private const CRED_TYPE = 'u';
    /**
     * The OAuth2 instance used to conduct authorization.
     *
     * @var OAuth2
     */
    protected $auth;
    /**
     * The quota project associated with the JSON credentials
     *
     * @var string
     */
    protected $quotaProject;
    /**
     * Create a new UserRefreshCredentials.
     *
     * @param string|string[] $scope the scope of the access request, expressed
     *   either as an Array or as a space-delimited String.
     * @param string|array<mixed> $jsonKey JSON credential file path or JSON credentials
     *   as an associative array
     */
    public function __construct($scope, $jsonKey)
    {
        if (\is_string($jsonKey)) {
            if (!\file_exists($jsonKey)) {
                throw new \InvalidArgumentException('file does not exist');
            }
            $json = \file_get_contents($jsonKey);
            if (!($jsonKey = \json_decode((string) $json, \true))) {
                throw new \LogicException('invalid json for auth config');
            }
        }
        if (!\array_key_exists('client_id', $jsonKey)) {
            throw new \InvalidArgumentException('json key is missing the client_id field');
        }
        if (!\array_key_exists('client_secret', $jsonKey)) {
            throw new \InvalidArgumentException('json key is missing the client_secret field');
        }
        if (!\array_key_exists('refresh_token', $jsonKey)) {
            throw new \InvalidArgumentException('json key is missing the refresh_token field');
        }
        $this->auth = new OAuth2(['clientId' => $jsonKey['client_id'], 'clientSecret' => $jsonKey['client_secret'], 'refresh_token' => $jsonKey['refresh_token'], 'scope' => $scope, 'tokenCredentialUri' => self::TOKEN_CREDENTIAL_URI]);
        if (\array_key_exists('quota_project_id', $jsonKey)) {
            $this->quotaProject = (string) $jsonKey['quota_project_id'];
        }
    }
    /**
     * @param callable $httpHandler
     * @param array<mixed> $metricsHeader [optional] Metrics headers to be inserted
     *     into the token endpoint request present.
     *     This could be passed from ImersonatedServiceAccountCredentials as it uses
     *     UserRefreshCredentials as source credentials.
     *
     * @return array<mixed> {
     *     A set of auth related metadata, containing the following
     *
     *     @type string $access_token
     *     @type int $expires_in
     *     @type string $scope
     *     @type string $token_type
     *     @type string $id_token
     * }
     */
    public function fetchAuthToken(callable $httpHandler = null, array $metricsHeader = [])
    {
        // We don't support id token endpoint requests as of now for User Cred
        return $this->auth->fetchAuthToken($httpHandler, $this->applyTokenEndpointMetrics($metricsHeader, 'at'));
    }
    /**
     * Return the Cache Key for the credentials.
     * The format for the Cache key is one of the following:
     * ClientId.Scope
     * ClientId.Audience
     *
     * @return string
     */
    public function getCacheKey()
    {
        $scopeOrAudience = $this->auth->getScope();
        if (!$scopeOrAudience) {
            $scopeOrAudience = $this->auth->getAudience();
        }
        return $this->auth->getClientId() . '.' . $scopeOrAudience;
    }
    /**
     * @return array<mixed>
     */
    public function getLastReceivedToken()
    {
        return $this->auth->getLastReceivedToken();
    }
    /**
     * Get the quota project used for this API request
     *
     * @return string|null
     */
    public function getQuotaProject()
    {
        return $this->quotaProject;
    }
    /**
     * Get the granted scopes (if they exist) for the last fetched token.
     *
     * @return string|null
     */
    public function getGrantedScope()
    {
        return $this->auth->getGrantedScope();
    }
    protected function getCredType() : string
    {
        return self::CRED_TYPE;
    }
}
