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<?php
/*
* Luicho Miranda
* miranda.luis (at) gmail (dot) com
* 17/Jun/2016
*/
class Bancard{
	
	private $private_key;
	private $public_key;
	private $service_url;
	private $payment_url;
	private $enviroment_url;

	private $return_url;
	private $cancel_url;

	private $item_description;
	private $currency_code = "PYG";
	private $response_mode = "URL";
	private $salt = '+PbC81_1jLd';

	public function __construct($production = true){
		$this->enviroment_url = $production 
		? 'https://vpos.infonet.com.py'
		: 'https://vpos.infonet.com.py:8888';

		$this->private_key = $production
		? 'dxcTf+FozvaKH+ztmNv83jmo(P.BHOq6BSz6x2C4' 	/* Clave privada de produccion */
		: '3JVrFOBs3ttjjP)hvh$J73.h8Y(ybtxfY21BBE0j'; //'KIWER2TD.8v9duSkOa7$X$9WOUJtV$t8q98aR0yL'; 		/* Clave privada de staging */

		$this->public_key  = $production
		? 'cwD1PgZf1wbiM8LULdaBxEeoP6Rmk3S7'	/* Clave publica de produccion */
		: 'cnbngaPQO3njdHrrxKopx5hTMzdpyILB';		/* Clave publica de staging */

		$this->service_url = $production
		? 'https://vpos.infonet.com.py/vpos/api/0.3/'		 /* URL del servicio en produccion */
		: 'https://vpos.infonet.com.py:8888/vpos/api/0.3/';  /* URL del servicio en staging */

		$this->payment_url = $production
		? 'https://vpos.infonet.com.py/payment/single_buy'		 /* URL de pagina de pagos en produccion */
		: 'https://vpos.infonet.com.py:8888/payment/single_buy'; /* URL de pagina de pagos en staging */


		$this->return_url = $production 
		? "https://yukicomics.com.py/checkout"
		: "https://yukicomics.dev/checkout";

		$this->cancel_url = $production 
		? "https://yukicomics.com.py/checkout?cancel=true"
		: "https://yukicomics.dev/checkout?cancel=true";
		
	}

	/*
	* Establece la clave publica desde el método
	*/
	public function set_public_key($key){
		$this->public_key = $key;
	}

	/*
	* Establece la clave privada desde el método
	*/
	public function set_private_key($key){
		$this->private_key = $key;
	}

	/*
	* Procesa los datos de la transacción para obtener el process_id
	* @transaction_id (int)
	* @amount (double)
	* @extra (array) - Claves: currency_code, additinal_data, item_description
	*/
	public function process($transaction_id, $amount, $extra = array()){

		$amount = number_format($amount,2,'.','');
		
		$this->currency_code = !isset($extra['currency_code'])
		? $this->currency_code
		: $extra['currency_code'];

		$this->item_description = isset($extra['item_description'])
		? $extra['item_description']
		: (($this->item_description != null) ? $this->item_description : "Transacción #{$transaction_id}");

		
		$token    = md5($this->private_key . $transaction_id . $amount . $this->currency_code);

		Log::write("bancard::process() " . json_encode([$transaction_id, $amount, $extra]));

		if(isset($extra['zimple']) && $extra["zimple"] == 'S'){
			$params = array(
				"public_key"            =>   $this->public_key,
				"operation"             => array(
					"token"             => $token,
					"shop_process_id"   => $transaction_id,
					"currency"          => $this->currency_code,
					"amount"            => $amount,
					"additional_data"   => $extra['phone_number'],
					"description"       => "TX #{$transaction_id}",
					"return_url"        => $this->return_url . '?t=' . md5($transaction_id . $this->salt),
					"cancel_url"        => $this->cancel_url . '?t=' . md5($transaction_id . $this->salt),
					"zimple"            => 'S'
				)
			);

			$result = $this->request(
				"single_buy",
				$params
			);

		}else{
			$params = array(
				"public_key" 			=> $this->public_key,
				"operation" 			=> array(
					"token"       		=> $token,
					"shop_process_id" 	=> $transaction_id,
                    "currency"          => $this->currency_code, 
                    "amount"      		=> $amount,
					"description"   	=> "TX #{$transaction_id}",
					"return_url" 		=> $this->return_url . '?t=' . md5($transaction_id . $this->salt),
					"cancel_url" 		=> $this->cancel_url . '?t=' . md5($transaction_id . $this->salt)
				)
			);
			$result = $this->request(
				"single_buy",
				$params
			);
		}

		Log::write('-------------------------');
		Log::write("Bancard enviroment: {$this->service_url}");
		Log::write('Bancard singleBuy[params] ' . json_encode($params));
		Log::write('Bancard singleBuy ' . json_encode($result));
		Log::write('-------------------------');

		Payments::set("hash",md5($transaction_id . $this->salt),"id = '{$transaction_id}'");
		
		$result = @json_decode($result);
	
		if(isset($result->process_id)){
			switch ($this->response_mode){
				default:
				case "URL":
					return $result->process_id;
					break;
				case "REDIRECT":
					$this->redirect($result->process_id);
					break;
				case "PROCESS_ID":
					return $result->process_id;
					break;
				case "OBJECT":
					return (object)array(
						"process_id" => $result->process_id,
						"url" => $this->payment_url,
						"query_string" => "?process_id=" . $result->process_id
					);
					break;
			}
		}else{

			if(isset($result->status) && $result->status == 'error')
			{
				foreach($result->messages as $msg)
				{
					Log::write('-------------------------');
					Log::write("Pedido #{$transaction_id} | Error bancard: " . $msg->dsc);
					Log::write('-------------------------');

					throw new Exception($msg->dsc);
				}
			} else {
				throw new Exception("Imposible obtener process id para transaccion #{$transaction_id}");
			}

			
		}
	}

	public function catastro($card_id, $usuario_id, $transaction_id = null){
		$return_url = !is_null($transaction_id) && !empty($transaction_id) ? baseURL."pagos?t={$transaction_id}" : baseURL."mis-tarjetas";
		// $transaction = Payments::select($transaction_id);
		$usuario = Usuario::select($usuario_id);

		$params = array(
			"public_key" => "$this->public_key",
			"operation" => array(
				"token" => md5($this->private_key . $card_id. $usuario_id .'request_new_card'),
				"card_id" => $card_id,
				"user_id" => $usuario_id,
				"user_cell_phone" => $usuario[0]['usuario_telefono'],
				"user_mail" => $usuario[0]['usuario_email'],
				"return_url" => $return_url
			)
		);

		$result = $this->request(
			"cards/new",			
			$params
		);

		Log::write('-------------------------');
		Log::write("Bancard enviroment: {$this->service_url}");
		Log::write('Bancard cards/new[params] ' . json_encode($params));
		Log::write('Bancard cards/new ' . json_encode($result));
		Log::write('-------------------------');

		return $result;
	}

	public function listaTarjetas($usuario_id){
		$result = $this->request(
			"users/{$usuario_id}/cards",
			array(
				"public_key" => $this->public_key,
				"operation" => array(
					"token" => md5($this->private_key. $usuario_id .'request_user_cards')
				)
			)
		);

		$result = @json_decode($result);

		Log::write('-------------------------');
		Log::write("Bancard enviroment: {$this->service_url}");
		Log::write('Bancard user/cards[params] ' . json_encode($usuario_id));
		Log::write('Bancard user/cards ' . json_encode($result));
		Log::write('-------------------------');


		if($result->status == 'success')
			return $result->cards;
		
		return [];
	}

	public function eliminarTarjeta($alias_token, $usuario_id){
		$params = array(
				"public_key" => $this->public_key,
				"operation" => array(
					"token" => md5($this->private_key . 'delete_card' .  $usuario_id . $alias_token),
					"alias_token" => $alias_token
				)
			);

		$result = $this->request(
			"users/{$usuario_id}/cards",
			$params,
			"DELETE"
		);

		Log::write('-------------------------');
		Log::write("Bancard enviroment: {$this->service_url}");
		Log::write('Bancard cards/delete[params] ' . json_encode($params));
		Log::write('Bancard cards/delete ' . json_encode($result));
		Log::write('-------------------------');

		return $result;
	}

	public function cobrarTarjeta($alias_token, $transaction_id, $amount)
	{
		$token = md5($this->private_key . $transaction_id . "charge" . $amount . $this->currency_code . $alias_token);

		$params = array(
			"public_key" =>  $this->public_key,
			"operation" =>  array(
				"token" => $token,
				"shop_process_id" =>  $transaction_id,
				"amount" =>  $amount,
				"number_of_payments" =>  1,
				"currency" =>  $this->currency_code,
				"additional_data" =>  "",
				"description" =>  "TX #{$transaction_id}",
				"alias_token" =>  $alias_token
			)
		);

		$result = $this->request(
			"charge",
			$params
		);

		Log::write('-------------------------');
		Log::write('Bancard cobrarTarjeta[params] ' . json_encode($params));
		Log::write('Bancard cobrarTarjeta ' . json_encode($result));
		Log::write('-------------------------');

		Payments::set("hash",md5($transaction_id . $this->salt),"id = '{$transaction_id}'");

		$result = @json_decode($result);
		$result->trid = md5($transaction_id . $this->salt);
		return $result;
	}

	/*
	* Envía petición de rollback sobre una transacción
	* @transaction_id (int)
	*/
	public function rollback($transaction_id){
		$result = $this->request(
			"single_buy/rollback",
			array(
				"public_key" => $this->public_key,
				"operation" => array(
					"token" => md5($this->private_key . $transaction_id .'rollback' . '0.00'),
					"shop_process_id" => $transaction_id
				)
			)
		);
		return $result;
	}

	/*
	* Consulta de confirmación de pago
	* @transaction_id (int)
	*/
	public function confirmations($transaction_id){
		$result = $this->request(
			"single_buy/confirmations",
			array(
				"public_key" => $this->public_key,
				"operation" => array(
					"token" => md5($this->private_key . $transaction_id . 'get_confirmation'),
					"shop_process_id" => $transaction_id
				)
			)
		);
		return $result;
	}


	/*
	* Lee la respuesta enviada por bancard a la url especificada en el panel de comercios de bancard
	*/
	public function get_response(){
		$response = file_get_contents("php://input");
		return $response;
	}

	public function get_enviroment() 
	{
		return $this->enviroment_url;
	}

	/*
	* Genera token para el método process
	* @transaction_id (int)
	* @amount (double)
	*/
	private function get_token($transaction_id, $amount){
		return md5($this->private_key . $transaction_id . $amount . $this->currency_code);
	}

	/*
	* Redirecciona a la página de pagos de bancard
	* @process_id (string)
	*/
	private function redirect($process_id){
		@ob_end_clean();
		header("Location: {$this->payment_url}?process_id={$process_id}");
		exit;
	}

	/*
	* Establece la url de cancelación del pago
	*/
	public function set_cancel_url($url){
		$this->cancel_url = $url;
	}

	/*
	* Establece la url de confirmación del pago
	*/
	public function set_return_url($url){
		$this->return_url = $url;
	}

	public function set_currency($cc){
		$this->currency_code = $cc;
	}

	/*
	* Establece modo de respuesta para el método process
	*/
	public function set_response_mode($mode){
		switch ($mode) {
			case "URL":
			case "REDIRECT":
			case "PROCESS_ID":
			case "OBJECT":
				$this->response_mode = $mode;
				break;
			default:
				throw new Exception("Modo de respuesta no definido");
				break;
		}
	}

	/*
	* Establece descripción para el item
	*/
	public function set_item_description($description){
		$this->item_description = $description;
	}

	/*
	* Envía peticiones al servicio de bancard
	*/
	private function request($action, $data, $method = "POST"){

		$data = @json_encode($data);
		$headers = array(
			'Content-Type: application/json'
		);

		$session = curl_init($this->service_url . $action);

		curl_setopt($session, CURLOPT_SSL_VERIFYHOST, 0);
		curl_setopt($session, CURLOPT_SSL_VERIFYPEER, 0);
		if($method !== 'POST')
			curl_setopt($session, CURLOPT_CUSTOMREQUEST, $method);
		else
			curl_setopt($session, CURLOPT_POST, true);


		curl_setopt($session, CURLOPT_POSTFIELDS, $data);
		curl_setopt($session, CURLOPT_HEADER, false);
		curl_setopt($session, CURLOPT_HTTPHEADER, $headers);
		curl_setopt($session, CURLOPT_RETURNTRANSFER, true);

	    $response = curl_exec($session);
	    $error = curl_error($session);
	    curl_close($session);

	    if($response === false){
			throw new Exception("No se pudo enviar la petición {$action}. {$error}");
		}else{
			return $response;
		}

	}
}