<?php
/**
 * Created by PhpStorm.
 * User: root
 * Date: 10/16/18
 * Time: 8:45 AM
 */

namespace App\Libraries;

use Carbon\Carbon;
use GuzzleHttp\Client;
use GuzzleHttp\Exception\RequestException;
use GuzzleHttp\Psr7\Uri;
use GuzzleHttp\Psr7;
use Illuminate\Support\Facades\Config;

class Paypal
{
	protected $url;

	protected $grant_type;
	protected $client_id;
	protected $secret;
	protected $access_token;

	protected $return_url;
	protected $cancel_url;
	protected $total;
	protected $paypal_fee;
	protected $custom;
	protected $invoice_number;
	protected $trans_num;

	protected $paypal_id;
	protected $self_url;
	protected $approval_url;
	protected $execute_url;
	protected $response;
	protected $payer_id;
	protected $error_message;

	protected $payer_firstname;
	protected $payer_lastname;
	protected $payer_email;
	protected $receiver_email;
	protected $paid_at;

	public function __construct()
	{	
		if(env("PAYPAL_ENV", '') == "SANDBOX")
		{
			$this->url 		 = new Uri(env("PAYPAL_SANDBOX_URL", ''));
			$this->client_id = env("PAYPAL_SANDBOX_CLIENTID", '');
			$this->secret 	 = env("PAYPAL_SANDBOX_SECRET", '');
		}
		else
		{
			$this->url 		 = new Uri(env("PAYPAL_LIVE_URL", ''));
			$this->client_id = env("PAYPAL_LIVE_CLIENTID", '');
			$this->secret 	 = env("PAYPAL_LIVE_SECRET", '');
		}

		$this->return_url = env("FRONT_END_URL", '').'/topup-success-page';
		$this->cancel_url = env("FRONT_END_URL", '').'/topup-error-page';
		
	}

	public function set_amount($var){ $this->amount = $var; }

	public function set_invoice_number($var){ $this->invoice_number = $var; }
	public function get_invoice_number(){ return $this->invoice_number; }

	public function set_trans_num($var){ $this->trans_num = $var; }
	public function get_trans_num(){ return $this->trans_num; }

	public function set_paypal_id($var){ $this->paypal_id = $var; }
	public function get_paypal_id(){ return $this->paypal_id; }

	public function set_self_url($var){ $this->self_url = $var; }
	public function get_self_url(){ return $this->self_url; }

	public function set_approval_url($var){ $this->approval_url = $var; }
	public function get_approval_url(){ return $this->approval_url; }

	public function set_execute_url($var){ $this->execute_url = $var; }
	public function get_execute_url(){ return $this->execute_url; }

	public function set_payer_id($var){ $this->payer_id = $var; }
	public function get_payer_id(){ return $this->payer_id; }

	public function set_response($var){ $this->response = $var; }
	public function get_response(){ return $this->response; }

	public function set_error_message($var){ $this->error_message = $var; }
	public function get_error_message(){ return $this->error_message; }

	public function set_payer_firstname($var){ $this->payer_firstname = $var; }
	public function get_payer_firstname(){ return $this->payer_firstname; }

	public function set_payer_lastname($var){ $this->payer_lastname = $var; }
	public function get_payer_lastname(){ return $this->payer_lastname; }

	public function set_payer_email($var){ $this->payer_email = $var; }
	public function get_payer_email(){ return $this->payer_email; }

	public function set_receiver_email($var){ $this->receiver_email = $var; }
	public function get_receiver_email(){ return $this->receiver_email; }

	public function set_paid_at($var){ $this->paid_at = $var; }
	public function get_paid_at(){ return $this->paid_at; }

	public function set_total($var){ $this->total = $var; }
	public function get_total(){ return $this->total; }

	public function set_paypal_fee($var){ $this->paypal_fee = $var; }
	public function get_paypal_fee(){ return $this->paypal_fee; }


	private function auth()
	{
		$client = new Client();
		$response  = $client->request('POST', $this->url.'/oauth2/token', [
													'auth' =>[
														$this->client_id,
														$this->secret
													],
													'headers' => [
														'Content-Type' => 'application/x-www-form-urlencoded'
													],
													'form_params' => [
														'grant_type' => 'client_credentials'
													]
												]);

		$response = $response->getBody()->getContents();

		if($response !== null)
		{
			$decoded = json_decode($response);

			if(isset($decoded->access_token))
			{
				$this->access_token = $decoded->access_token;
				return true;
			}
		}

		return false;
	}

	private function exec_client($path, $body, $method = 'POST')
	{
		$client = new Client();
		try
		{

			$response  = $client->request($method, $this->url.$path, [
														'headers' => [
															'Authorization' => 'Bearer '.$this->access_token,
															'Content-Type' => 'application/json'
														],
														'json' => $body
													]);

			return $response->getBody()->getContents();
		}
		catch (RequestException $e)
		{
			if ($e->hasResponse()) 
			{
			     return $e->getResponse()->getBody()->getContents();
			}
		}

	}

	public function generate_paypal_url()
	{
		if($this->auth())
		{
			$body = [
				'intent' => 'sale',
				'redirect_urls' => [
					'return_url' => $this->return_url,
					'cancel_url' => $this->return_url,
				],
				'payer' =>[
					'payment_method' => 'paypal'
				],
				'transactions' => [
					0 => [
						'amount' => [
							'total' 	=> $this->amount,
							'currency' 	=> 'PHP',
						],
						'description' => 'Unioil Top Up Points',
						'custom' => $this->get_invoice_number(),
						'invoice_number' => $this->get_invoice_number(),
						'payment_options' => [
							'allowed_payment_method' => 'INSTANT_FUNDING_SOURCE'
						],
						'item_list' => [
							'items' => [
								0 => [
									'name' => 'Unioil Top Up Points',
									'description' => 'Unioil Prepaid Load',
									'quantity' => 1,
									'price' => $this->amount,
									'tax' => 0,
									'sku' => 'PREPAID',
									'currency' => 'PHP'
								]
							]
						]
					]
				],
				'note_to_payer' => 'Contact us for any questions on your order'
			];

			$response = $this->exec_client('/payments/payment', $body);
			$response = json_decode($response);

			if(isset($response->id))
			{
				$this->set_paypal_id($response->id);
				$this->set_self_url($response->links[0]->href);
				$this->set_approval_url($response->links[1]->href);
				$this->set_execute_url($response->links[2]->href);
				$this->set_response($response);

				return true;
			}
		}

		return false;
	}

	public function paypal_verify()
	{
		if($this->auth())
		{
			$response = $this->exec_client('/payments/payment/'.$this->get_paypal_id(),[],'GET');
			$response = json_decode($response);
			
			if(isset($response->payer->status) == "VERIFIED")
			{
				$this->set_payer_id($response->payer->payer_info->payer_id);
				return true;

			}
			elseif (isset($response->payer->status) == "UNVERIFIED")
			{
				$this->set_error_message('Paypal user unverified');
				return false;
			}
			else
			{
				$this->set_error_message('Paypal transaction incomplete');
				return false;
			}
		}
	}

	public function paypal_execute()
	{
		if($this->auth())
		{
			$body = ['payer_id' => $this->get_payer_id()];

			$response = $this->exec_client('/payments/payment/'.$this->get_paypal_id().'/execute',$body);
			$response = json_decode($response);

			if(isset($response->payer->status) && $response->payer->status == "VERIFIED")
			{
				$this->set_invoice_number($response->transactions[0]->invoice_number);
				$this->set_trans_num($response->transactions[0]->related_resources[0]->sale->id);
				$this->set_payer_firstname($response->payer->payer_info->first_name);
				$this->set_payer_lastname($response->payer->payer_info->last_name);
				$this->set_payer_email($response->payer->payer_info->email);
				$this->set_receiver_email($response->transactions[0]->payee->email);
				$this->set_paid_at($response->create_time);
				$this->set_total($response->transactions[0]->amount->total);
				$this->set_paypal_fee($response->transactions[0]->related_resources[0]->sale->transaction_fee->value);
				$this->set_response($response);
				return true;
			}
			elseif(isset($response->debug_id))
			{
				$this->set_error_message($response->message);
				$this->set_response($response);
				return false;
			}
			else
			{
				$this->set_response($response);
				return false;
			}
		}
	}


}