<?php

namespace WPMailSMTP\Vendor\Aws\Endpoint;

use ArrayAccess;
use WPMailSMTP\Vendor\Aws\HasDataTrait;
use WPMailSMTP\Vendor\Aws\Sts\RegionalEndpoints\ConfigurationProvider;
use WPMailSMTP\Vendor\Aws\S3\RegionalEndpoint\ConfigurationProvider as S3ConfigurationProvider;
use InvalidArgumentException as Iae;
/**
 * Default implementation of an AWS partition.
 */
final class Partition implements \ArrayAccess, \WPMailSMTP\Vendor\Aws\Endpoint\PartitionInterface
{
    use HasDataTrait;
    private $stsLegacyGlobalRegions = ['ap-northeast-1', 'ap-south-1', 'ap-southeast-1', 'ap-southeast-2', 'aws-global', 'ca-central-1', 'eu-central-1', 'eu-north-1', 'eu-west-1', 'eu-west-2', 'eu-west-3', 'sa-east-1', 'us-east-1', 'us-east-2', 'us-west-1', 'us-west-2'];
    /**
     * The partition constructor accepts the following options:
     *
     * - `partition`: (string, required) The partition name as specified in an
     *   ARN (e.g., `aws`)
     * - `partitionName`: (string) The human readable name of the partition
     *   (e.g., "AWS Standard")
     * - `dnsSuffix`: (string, required) The DNS suffix of the partition. This
     *   value is used to determine how endpoints in the partition are resolved.
     * - `regionRegex`: (string) A PCRE regular expression that specifies the
     *   pattern that region names in the endpoint adhere to.
     * - `regions`: (array, required) A map of the regions in the partition.
     *   Each key is the region as present in a hostname (e.g., `us-east-1`),
     *   and each value is a structure containing region information.
     * - `defaults`: (array) A map of default key value pairs to apply to each
     *   endpoint of the partition. Any value in an `endpoint` definition will
     *   supersede any values specified in `defaults`.
     * - `services`: (array, required) A map of service endpoint prefix name
     *   (the value found in a hostname) to information about the service.
     *
     * @param array $definition
     *
     * @throws Iae if any required options are missing
     */
    public function __construct(array $definition)
    {
        foreach (['partition', 'regions', 'services', 'dnsSuffix'] as $key) {
            if (!isset($definition[$key])) {
                throw new \InvalidArgumentException("Partition missing required {$key} field");
            }
        }
        $this->data = $definition;
    }
    public function getName()
    {
        return $this->data['partition'];
    }
    /**
     * @internal
     * @return mixed
     */
    public function getDnsSuffix()
    {
        return $this->data['dnsSuffix'];
    }
    public function isRegionMatch($region, $service)
    {
        if (isset($this->data['regions'][$region]) || isset($this->data['services'][$service]['endpoints'][$region])) {
            return \true;
        }
        if (isset($this->data['regionRegex'])) {
            return (bool) \preg_match("@{$this->data['regionRegex']}@", $region);
        }
        return \false;
    }
    public function getAvailableEndpoints($service, $allowNonRegionalEndpoints = \false)
    {
        if ($this->isServicePartitionGlobal($service)) {
            return [$this->getPartitionEndpoint($service)];
        }
        if (isset($this->data['services'][$service]['endpoints'])) {
            $serviceRegions = \array_keys($this->data['services'][$service]['endpoints']);
            return $allowNonRegionalEndpoints ? $serviceRegions : \array_intersect($serviceRegions, \array_keys($this->data['regions']));
        }
        return [];
    }
    public function __invoke(array $args = [])
    {
        $service = isset($args['service']) ? $args['service'] : '';
        $region = isset($args['region']) ? $args['region'] : '';
        $scheme = isset($args['scheme']) ? $args['scheme'] : 'https';
        $options = isset($args['options']) ? $args['options'] : [];
        $data = $this->getEndpointData($service, $region, $options);
        $variant = $this->getVariant($options, $data);
        if (isset($variant['hostname'])) {
            $template = $variant['hostname'];
        } else {
            $template = isset($data['hostname']) ? $data['hostname'] : '';
        }
        $dnsSuffix = isset($variant['dnsSuffix']) ? $variant['dnsSuffix'] : $this->data['dnsSuffix'];
        return ['endpoint' => "{$scheme}://" . $this->formatEndpoint($template, $service, $region, $dnsSuffix), 'signatureVersion' => $this->getSignatureVersion($data), 'signingRegion' => isset($data['credentialScope']['region']) ? $data['credentialScope']['region'] : $region, 'signingName' => isset($data['credentialScope']['service']) ? $data['credentialScope']['service'] : $service];
    }
    private function getEndpointData($service, $region, $options)
    {
        $defaultRegion = $this->resolveRegion($service, $region, $options);
        $data = isset($this->data['services'][$service]['endpoints'][$defaultRegion]) ? $this->data['services'][$service]['endpoints'][$defaultRegion] : [];
        $data += isset($this->data['services'][$service]['defaults']) ? $this->data['services'][$service]['defaults'] : [];
        $data += isset($this->data['defaults']) ? $this->data['defaults'] : [];
        return $data;
    }
    private function getSignatureVersion(array $data)
    {
        static $supportedBySdk = ['s3v4', 'v4', 'anonymous'];
        $possibilities = \array_intersect($supportedBySdk, isset($data['signatureVersions']) ? $data['signatureVersions'] : ['v4']);
        return \array_shift($possibilities);
    }
    private function resolveRegion($service, $region, $options)
    {
        if (isset($this->data['services'][$service]['endpoints'][$region]) && $this->isFipsEndpointUsed($region)) {
            return $region;
        }
        if ($this->isServicePartitionGlobal($service) || $this->isStsLegacyEndpointUsed($service, $region, $options) || $this->isS3LegacyEndpointUsed($service, $region, $options)) {
            return $this->getPartitionEndpoint($service);
        }
        return $region;
    }
    private function isServicePartitionGlobal($service)
    {
        return isset($this->data['services'][$service]['isRegionalized']) && \false === $this->data['services'][$service]['isRegionalized'] && isset($this->data['services'][$service]['partitionEndpoint']);
    }
    /**
     * STS legacy endpoints used for valid regions unless option is explicitly
     * set to 'regional'
     *
     * @param string $service
     * @param string $region
     * @param array $options
     * @return bool
     */
    private function isStsLegacyEndpointUsed($service, $region, $options)
    {
        return $service === 'sts' && \in_array($region, $this->stsLegacyGlobalRegions) && (empty($options['sts_regional_endpoints']) || \WPMailSMTP\Vendor\Aws\Sts\RegionalEndpoints\ConfigurationProvider::unwrap($options['sts_regional_endpoints'])->getEndpointsType() !== 'regional');
    }
    /**
     * S3 legacy us-east-1 endpoint used for valid regions unless option is explicitly
     * set to 'regional'
     *
     * @param string $service
     * @param string $region
     * @param array $options
     * @return bool
     */
    private function isS3LegacyEndpointUsed($service, $region, $options)
    {
        return $service === 's3' && $region === 'us-east-1' && (empty($options['s3_us_east_1_regional_endpoint']) || \WPMailSMTP\Vendor\Aws\S3\RegionalEndpoint\ConfigurationProvider::unwrap($options['s3_us_east_1_regional_endpoint'])->getEndpointsType() !== 'regional');
    }
    private function getPartitionEndpoint($service)
    {
        return $this->data['services'][$service]['partitionEndpoint'];
    }
    private function formatEndpoint($template, $service, $region, $dnsSuffix)
    {
        return \strtr($template, ['{service}' => $service, '{region}' => $region, '{dnsSuffix}' => $dnsSuffix]);
    }
    /**
     * @param $region
     * @return bool
     */
    private function isFipsEndpointUsed($region)
    {
        return \strpos($region, "fips") !== \false;
    }
    /**
     * @param array $options
     * @param array $data
     * @return array
     */
    private function getVariant(array $options, array $data)
    {
        $variantTags = [];
        if (isset($options['use_fips_endpoint'])) {
            $useFips = $options['use_fips_endpoint'];
            if (\is_bool($useFips)) {
                $useFips && ($variantTags[] = 'fips');
            } elseif ($useFips->isUseFipsEndpoint()) {
                $variantTags[] = 'fips';
            }
        }
        if (isset($options['use_dual_stack_endpoint'])) {
            $useDualStack = $options['use_dual_stack_endpoint'];
            if (\is_bool($useDualStack)) {
                $useDualStack && ($variantTags[] = 'dualstack');
            } elseif ($useDualStack->isUseDualStackEndpoint()) {
                $variantTags[] = 'dualstack';
            }
        }
        if (!empty($variantTags)) {
            if (isset($data['variants'])) {
                foreach ($data['variants'] as $variant) {
                    if (\array_count_values($variant['tags']) == \array_count_values($variantTags)) {
                        return $variant;
                    }
                }
            }
            if (isset($this->data['defaults']['variants'])) {
                foreach ($this->data['defaults']['variants'] as $variant) {
                    if (\array_count_values($variant['tags']) == \array_count_values($variantTags)) {
                        return $variant;
                    }
                }
            }
        }
    }
}
