<?php

namespace Qcloud\Cos;

use Guzzle\Service\Description\Parameter;
use Guzzle\Service\Description\ServiceDescription;
use GuzzleHttp\HandlerStack;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;
use Qcloud\Cos\Signature;
use GuzzleHttp\Command\Guzzle\Description;
use GuzzleHttp\Command\Guzzle\GuzzleClient;
use GuzzleHttp\Command\CommandInterface;
use GuzzleHttp\Exception\RequestException;
use GuzzleHttp\Middleware;
use GuzzleHttp\Psr7;
use GuzzleHttp\Psr7\Uri;
use InvalidArgumentException;


class CommandToRequestTransformer {
    private $config;
    private $operation;

    public function __construct($config ,$operation) {
        $this->config = $config;
        $this->operation = $operation;
    }

    // format bucket style
    public function bucketStyleTransformer(CommandInterface $command, RequestInterface $request) {
        $action = $command->getName();
        if ($action == 'ListBuckets') {
            return $request->withUri(new Uri($this->config['schema']."://service.cos.myqcloud.com/"));
        }
        $operation = $this->operation;
        $bucketname = $command['Bucket'];

        $appId = $this->config['appId'];
        if ($appId != null && endWith($bucketname, '-'.$appId) == False)
        {
            $bucketname = $bucketname.'-'.$appId;
        }
        $command['Bucket'] = $bucketname;
        $path = ''; 
        $http_method = $operation['httpMethod'];
        $uri = $operation['uri'];
        
        // Hoststyle is used by default
        // Pathstyle
        if ($this->config['pathStyle'] != true) {
            if (isset($operation['parameters']['Bucket']) && $command->hasParam('Bucket')) {
                $uri = str_replace("{Bucket}", '', $uri);
            }   
            if (isset($operation['parameters']['Key']) && $command->hasParam('Key')) {
                $uri = str_replace("{/Key*}", encodeKey($command['Key']), $uri);
            }
        }
        $origin_host = $bucketname. '.cos.' . $this->config['region'] . '.' . $this->config['endpoint'];
        // domain
        if ($this->config['domain'] != null) {
            $origin_host = $this->config['domain'];
        }
        $host = $origin_host;
        if ($this->config['ip'] != null) {
            $host = $this->config['ip'];
            if ($this->config['port'] != null) {
                $host = $this->config['ip'] . ":" . $this->config['port'];
            }
        }


        $path = $this->config['schema'].'://'. $host . $uri;
        $uri = new Uri($path);
        $query = $request->getUri()->getQuery();
        if ($uri->getQuery() != $query && $uri->getQuery() != "") {
            $query =   $uri->getQuery() . "&" . $request->getUri()->getQuery();
        }
        $uri = $uri->withQuery($query);
        $request = $request->withUri($uri);
        $request = $request->withHeader('Host', $origin_host);
        return $request;
    }

    // format upload body
    public function uploadBodyTransformer(CommandInterface $command, $request, $bodyParameter = 'Body', $sourceParameter = 'SourceFile') {
        
        $operation = $this->operation;
        if (!isset($operation['parameters']['Body'])) {
            return $request;
        }
        $source = isset($command[$sourceParameter]) ? $command[$sourceParameter] : null;
        $body = isset($command[$bodyParameter]) ? $command[$bodyParameter] : null;
        // If a file path is passed in then get the file handle
        if (is_string($source) && file_exists($source)) {
            $body = fopen($source, 'rb');
        }
        // Prepare the body parameter and remove the source file parameter
        if (null !== $body) {
            return $request;
        } else {
            throw new InvalidArgumentException(
                "You must specify a non-null value for the {$bodyParameter} or {$sourceParameter} parameters.");
        }
    }

    // update md5
    public function md5Transformer(CommandInterface $command, $request) {
        $operation = $this->operation;
        if (isset($operation['data']['contentMd5'])) {
            $request = $this->addMd5($request);
        }
        if (isset($operation['parameters']['ContentMD5']) &&
            isset($command['ContentMD5'])) {
            $value = $command['ContentMD5'];
            if ($value === true) {
                $request = $this->addMd5($request);
            }
        }

        return $request;
    }

    // add meta
    public function metadataTransformer(CommandInterface $command, $request) {
        $operation = $this->operation;
        if (isset($command['Metadata'])) {
            $meta = $command['Metadata'];
            foreach ($meta as $key => $value) {
                $request = $request->withHeader('x-cos-meta-' . $key, $value);
            }
        }
        $request = headersMap($command, $request);  
        return $request;
    }

    // count md5
    private function addMd5($request) {
        $body = $request->getBody();
        if ($body && $body->getSize() > 0) {
            $md5 = base64_encode(md5($body, true));
            return $request->withHeader('Content-MD5', $md5);
        }
        return $request;
    }

    // inventoryId
    public function specialParamTransformer(CommandInterface $command, $request) {
        $action = $command->getName();
        if ($action == 'PutBucketInventory') {
            $id = $command['Id'];
            $uri = $request->getUri();
            $query = $uri->getQuery();
            $uri = $uri->withQuery($query . "&Id=".$id);
            return $request->withUri($uri);
        }
        return $request;
    }

    public function __destruct() {
    }

}
