<?php

namespace App\Service;

use GuzzleHttp\Client;
use GuzzleHttp\Psr7;
use GuzzleHttp\Exception\RequestException;

use App\Entity\Customer;

class PayMongoConnector
{
    protected $base_url;
    protected $public_key;
    protected $secret_key;
    protected $hash;

    public function __construct($base_url, $public_key, $secret_key)
    {
        $this->base_url = $base_url;
        $this->public_key = $public_key;
        $this->secret_key = $secret_key;
        $this->hash = $this->generateHash();
    }

    public function createCheckout(Customer $cust, $items, $ref_no = null, $description = null, $success_url = null, $cancel_url = null, $metadata = [])
    {
        // build billing info
        $billing = [
            'name' => implode(" ", [$cust->getFirstName(), $cust->getLastName()]),
            'phone' => $cust->getPhoneMobile(),
        ];

        if ($cust->getEmail()) {
            $billing['email'] = $cust->getEmail();
        }

        // build the request body
        $body = [
            'data' => [
                'attributes' => [
                    'description' => $description,
                    'billing' => $billing,
                    // NOTE: this may be variable later, hardcoding for now
                    'payment_method_types' => [
                        'card',
                        'paymaya',
                        'gcash',
                    ],
                    /* NOTE: format for line items:
                     * ['name', 'description', 'quantity', 'amount', 'currency']
                     */
                    'line_items' => $items,
                    'reference_number' => (string)$ref_no,
                    'cancel_url' => $cancel_url,
                    'success_url' => $success_url,
                    'statement_descriptor' => $description,
                    'send_email_receipt' => true,
                    'show_description' => true,
                    'show_line_items' => false,
                ],
            ],
        ];

        if (!empty($metadata)) {
            $body['data']['attributes']['metadata'] = $metadata;
        }

        return $this->doRequest('/v1/checkout_sessions', 'POST', $body);
    }

    public function getCheckout($checkout_id)
    {
        return $this->doRequest('/v1/checkout_sessions/' . $checkout_id, 'GET');
    }

    protected function generateHash()
    {
        return base64_encode($this->secret_key);
    }

    protected function doRequest($url, $method, $request_body = [])
    {
        $client = new Client();
        $headers = [
            'Content-Type' => 'application/json',
            'accept' => 'application/json',
            'authorization' => 'Basic '. $this->hash,
        ];

        try {
            $response = $client->request($method, $this->base_url . '/' . $url, [
                'json' => $request_body,
                'headers' => $headers,
            ]);
        } catch (RequestException $e) {
            $error = ['message' => $e->getMessage()];

            ob_start();
            //var_dump($request_body);
            $varres = ob_get_clean();
            error_log($varres);

            error_log("--------------------------------------");
            error_log($e->getResponse()->getBody()->getContents());

            error_log("PayMongo API Error: " . $error['message']);
            error_log(Psr7\Message::toString($e->getRequest()));

            // log this error
            $this->log($url, Psr7\Message::toString($e->getRequest()), Psr7\Message::toString($e->getResponse()), 'error');

            if ($e->hasResponse()) {
                $error['response'] = Psr7\Message::toString($e->getResponse());
            }

            return [
                'success' => false,
                'error' => $error,
            ];
        }

        $result_body = $response->getBody();

        // log response
        $this->log($url, json_encode($request_body), $result_body);

        return [
            'success' => true,
            'response' => json_decode($response->getBody(), true)
        ];
    }

    // TODO: make this more elegant
    public function log($title, $request_body = "[]", $result_body = "[]", $type = 'api')
    {
        $filename = '/../../var/log/paymongo_' . $type . '.log';
        $date = date("Y-m-d H:i:s");

        // build log entry
        $entry = implode("\r\n", [
            $date,
            $title,
            "REQUEST:\r\n" . $request_body,
            "RESPONSE:\r\n" . $result_body,
            "\r\n----------------------------------------\r\n\r\n",
        ]);

        @file_put_contents(__DIR__ . $filename, $entry, FILE_APPEND);
    }
}