<?php defined('BASEPATH') OR exit('No direct script access allowed');


include_once APPPATH.'/vendor/autoload.php';
use Aws\S3\S3Client;
use Aws\Exception\AwsException;
use Aws\CommandPool;

class AWS_S3
{
	private $S3;
	private $name = "TEST";
	private $CI;
	private $s3_properties; 
	public function __construct()
    {
        // Construct the parent class
        //parent::__construct();
			
		$this->CI =& get_instance();
		$this->s3_properties = array('region'=>'ap-south-1','version'=>'latest','credentials' => array(
		'key' =>$this->CI->config->item('s3_resource_key'),
		'secret'  => $this->CI->config->item('s3_resource_secret')
	  	));
			$this->S3 = S3Client::factory($this->s3_properties);
          // echo "Called";
		 // $this->setCors('lender8');die();
		
    }
	
	public function listAllBuckets()
	{
		
		$buckets = array();
	try{
			$buckets = $this->S3->listBuckets();
	   
	   } catch(AwsException $e){ 
			// echo $e->getMessage();
			// echo "\n"; .
			}
		
		return $buckets;
	}
	
	public function createNewBucket($BUCKET_NAME)
	{
		
		try {
				$result = $this->S3->createBucket(['ACL' => 'private','Bucket' => $BUCKET_NAME]);
				
				return $result;
			} catch (AwsException $e) {
				//output error message if fails
				log_message('ERROR', $e->getMessage());
				return $e->getMessage();
				//echo "\n";
			}
	}
	
	public function uploadFileToS3Bucket($data)
	{
		$result = "";
		try {
			
				$result = $this->S3->putObject([
				'Bucket'     => $data['bucket_name'],
				'Key'        => $data['key'],
				'SourceFile' => $data['sourcefile'],
				'ContentType' => '*/*',
				'StorageClass' => 'STANDARD',
				'ACL'=>'private'
				]);
			
			} catch (AwsException $e) 
			{
				$result =  false;
				log_message('ERROR',$e);
			}
			
		return $result;	
	}
	
	/* This Function return signed URI of single S3 Object*/
	public function getSingleObjectInaBucketAsSignedURI($bucket_name,$folder_name,$time = '+5 minutes')//get as singed url
	{
		$result = array();
		
		try {
			
		// $result = $this->S3->getObject([
        // 'Bucket' => 'thecucumber',
        // 'Key'    => 'byapi/woodgrass1.jpg'
		// //'ResponseContentType'        => 'image/png'
		// //'ResponseContentDisposition' => 'attachment; woodgrass1.jpg',
			// ]);
			
						$cmd = $this->S3->getCommand('GetObject', [
							'Bucket' => $bucket_name,
							'Key'    => $folder_name
						]);

				$request = $this->S3->createPresignedRequest($cmd, $time);
				$presignedUrl = (string) $request->getUri();
		}
		catch(AwsException $e)
		{
			return $e->getMessage();
		}
		
			return $presignedUrl;
			

	}

	public function getS3SingleObj($bucket_name,$folder_name,$time = '+5 minutes')
	{
		//echo $time;die();
		$result = $this->S3->getObject([
        'Bucket' => $bucket_name,
        'Key'    => $folder_name
		//'ResponseContentType'        => 'image/png'
		//'ResponseContentDisposition' => 'attachment; woodgrass1.jpg',
			]);

		return result; 
	}
	// Get List of objetcs as byte(Raw file).
	public function getAllObjectsInaBucket($bucket_name,$folder_name)
	{
		$objects = array();
				try {
						$objects = $this->S3->getIterator('ListObjects', [
							'Bucket' => $bucket_name,
							'Prefix' => $folder_name
						]);

						// echo "Keys retrieved!" ;
						// //print_r($objects);
					// 	foreach ($objects as $object) {
					// 		print_r($object) ;
					// }
		} catch (S3Exception $e) {
			echo $e->getMessage() . PHP_EOL;
		}
		
		return $objects;

	}
	
	
	// Delete an object from the bucket.
	public function deleteSingleObjFromBucket($bucket,$key)
	{
		
			$result = $this->S3->deleteObject([
				'Bucket' => $bucket,
				'Key'    => $key
			]);
			
			return $result;
	}
	
	 public function setCors($BUCKETNAME)
	{
		
		$result = $this->S3->putBucketCors([
    'Bucket' => $BUCKETNAME,
    'CORSConfiguration' => [
        'CORSRules' => [
            [
                'AllowedHeaders' => [
                    '*',
                ],
                'AllowedMethods' => [
                    'PUT',
                    'POST',
                    'DELETE',
                ],
                'AllowedOrigins' => [
                    '*',
                ],
                'ExposeHeaders' => [
                    'x-amz-server-side-encryption',
                ],
                'MaxAgeSeconds' => 3000,
            ],
            [
                'AllowedHeaders' => [
                    'Authorization',
                ],
                'AllowedMethods' => [
                    'GET',
                ],
                'AllowedOrigins' => [
                    '*',
                ],
                'MaxAgeSeconds' => 3000,
            ],
        ],
    ]
    
]);

return $result;
	}

	
	public function getCORES($BUCKETNAME)
	{
		$result = $this->S3->getBucketCors([
	    'Bucket' => $BUCKETNAME]);
		//////print_r($result);
	}

	public function copyS3Object($targetBucket,$sourceBucket,$sourceKeyname,$tagetKeyname)
	{

		//echo $sourceBucket.'/'.$sourceKeyname;
				// Copy an object.
		$res = $this->S3->copyObject([
		    'Bucket'     => $targetBucket,
		    'Key'        => $tagetKeyname.'/'.$tagetKeyname.'.png',
		    'CopySource' => $sourceBucket.'/'.$sourceKeyname.'/v4MLA2019-01-12-18:01:21.png'
		]);

		print($res);
	}

	public function dupSinglePDImages($bucketName,$sourceKey,$targetKey)
	{
		//first get all images/s3 obj from source bucket$objects = array();
		$existingS3Objects = array();
		$copied_objects = 0;
		try {

			   $existingS3Objects =$this->S3->listObjects(['Bucket' => $bucketName,'Prefix' => $sourceKey]);
					if(isset($existingS3Objects['Contents']) && count($existingS3Objects['Contents'])) 
					{
						// Perform a batch of CopyObject operations.
						$batch = array();
						foreach($existingS3Objects['Contents'] as $obj_key => $obj_vale)
						{
							$key = ($obj_vale['Key']);
							$fulltargetKey = (function() use ($targetKey,$key){
								$res = '';
								$t = explode('/',$key);unset($t[0]);
								foreach ($t as $index => $value) { $res .= (count($t) == ($index+1) ? $value.'/' : $value); }
								return $targetKey.'/'.$res;

							});
							$fulltargetKey = $fulltargetKey();
							//echo $fulltargetKey.'###'.$bucketName.'/'.$key.'~~~';
						    $batch[] = $this->S3->getCommand('CopyObject', [
						        'Bucket'     => $bucketName,
						        'Key'        => $fulltargetKey,
						        'CopySource' => "$bucketName/$key",
						        'MetadataDirective' => 'REPLACE'
						    ]);
						}

						try {
							    $results = CommandPool::batch($this->S3, $batch);
							    foreach($results as $result) {
							        if ($result instanceof ResultInterface)
							        {
							        	$copied_objects++;
							        	echo 'DONE';
							        }
							        if ($result instanceof AwsException) {
							            log_message('ERROR','###Error in Batch result - '.$result->getAwsErrorMessage());
							            
							        }
							    }
							} catch (Exception $e) 
							{
							    log_message('ERROR','###Error in executing Copy Batch Operation');
								log_message('ERROR',$e->getMessage());
								echo $e->getMessage() . PHP_EOL;
							}
					}   
			}catch (S3Exception $e) 
			{
			log_message('ERROR','###Error in getting all exist s3 keys');
			log_message('ERROR',$e->getMessage());
			//echo $e->getMessage() . PHP_EOL;
			}

			echo $copied_objects;
				   
	}
}

?>