<?php

namespace Aws\S3;

use Aws\Credentials\CredentialsInterface;
use GuzzleHttp\Psr7\Uri;

/**
 * @deprecated
 */
class PostObject {
	private $client;
	private $bucket;
	private $formAttributes;
	private $formInputs;
	private $jsonPolicy;

	/**
	 * Constructs the PostObject.
	 *
	 * @param S3ClientInterface $client Client used with the POST object
	 * @param string $bucket Bucket to use
	 * @param array $formInputs Associative array of form input
	 *                                      fields.
	 * @param string|array $jsonPolicy JSON encoded POST policy document.
	 *                                      The policy will be base64 encoded
	 *                                      and applied to the form on your
	 *                                      behalf.
	 */
	public function __construct(
		S3ClientInterface $client,
		$bucket,
		array $formInputs,
		$jsonPolicy
	) {
		$this->client = $client;
		$this->bucket = $bucket;

		if ( is_array( $jsonPolicy ) ) {
			$jsonPolicy = json_encode( $jsonPolicy );
		}

		$this->jsonPolicy     = $jsonPolicy;
		$this->formAttributes = [
			'action'  => $this->generateUri(),
			'method'  => 'POST',
			'enctype' => 'multipart/form-data'
		];

		$this->formInputs = $formInputs + [ 'key' => '${filename}' ];
		$credentials      = $client->getCredentials()->wait();
		$this->formInputs += $this->getPolicyAndSignature( $credentials );
	}

	private function generateUri() {
		$uri = new Uri( $this->client->getEndpoint() );

		if ( $this->client->getConfig( 'use_path_style_endpoint' ) === true
		     || ( $uri->getScheme() === 'https'
		          && strpos( $this->bucket, '.' ) !== false )
		) {
			// Use path-style URLs
			$uri = $uri->withPath( "/{$this->bucket}" );
		} else {
			// Use virtual-style URLs
			$uri = $uri->withHost( $this->bucket . '.' . $uri->getHost() );
		}

		return (string) $uri;
	}

	protected function getPolicyAndSignature( CredentialsInterface $creds ) {
		$jsonPolicy64 = base64_encode( $this->jsonPolicy );

		return [
			'AWSAccessKeyId' => $creds->getAccessKeyId(),
			'policy'         => $jsonPolicy64,
			'signature'      => base64_encode( hash_hmac(
				'sha1',
				$jsonPolicy64,
				$creds->getSecretKey(),
				true
			) )
		];
	}

	/**
	 * Gets the S3 client.
	 *
	 * @return S3ClientInterface
	 */
	public function getClient() {
		return $this->client;
	}

	/**
	 * Gets the bucket name.
	 *
	 * @return string
	 */
	public function getBucket() {
		return $this->bucket;
	}

	/**
	 * Gets the form attributes as an array.
	 *
	 * @return array
	 */
	public function getFormAttributes() {
		return $this->formAttributes;
	}

	/**
	 * Set a form attribute.
	 *
	 * @param string $attribute Form attribute to set.
	 * @param string $value Value to set.
	 */
	public function setFormAttribute( $attribute, $value ) {
		$this->formAttributes[ $attribute ] = $value;
	}

	/**
	 * Gets the form inputs as an array.
	 *
	 * @return array
	 */
	public function getFormInputs() {
		return $this->formInputs;
	}

	/**
	 * Set a form input.
	 *
	 * @param string $field Field name to set
	 * @param string $value Value to set.
	 */
	public function setFormInput( $field, $value ) {
		$this->formInputs[ $field ] = $value;
	}

	/**
	 * Gets the raw JSON policy.
	 *
	 * @return string
	 */
	public function getJsonPolicy() {
		return $this->jsonPolicy;
	}
}
