<?php

namespace common\helpers;

class PayStack
{
    /**
     *
     */
    public static function transactionInit($currency, $amount, $email){
        $secretKey = \Yii::$app->Paystack->testSecretKey;
        $url = "https://api.paystack.co/transaction/initialize";
        $fields = [
            'email' => $email,
            'amount' => $amount * 100
        ];
        $fields_string = http_build_query($fields);
        //open connection
        $ch = curl_init();

        //set the url, number of POST vars, POST data
        curl_setopt($ch,CURLOPT_URL, $url);
        curl_setopt($ch,CURLOPT_POST, true);
        curl_setopt($ch,CURLOPT_POSTFIELDS, $fields_string);
        curl_setopt($ch, CURLOPT_HTTPHEADER, array(
            "Authorization: Bearer {$secretKey}",
            "Cache-Control: no-cache",
        ));
        //So that curl_exec returns the contents of the cURL; rather than echoing it
        curl_setopt($ch,CURLOPT_RETURNTRANSFER, true);
        //execute post
        $result = curl_exec($ch);
        $result =  json_decode($result, true);
        return [
            'status'    => $result['status'],
            'message'   => $result['message'],
            'data'      => $result['data'],
        ];
    }
    /**
     * 交易支付.
     * @param $ref
     * @return array
     */
    public static function transactionVerify($ref): array
    {
        $payStack = \Yii::$app->Paystack;
        $transaction = $payStack->transaction()->setRequestOptions($ref);
        $transaction->verify();

        return [
            'status'    => $transaction->status,
            'message'   => $transaction->message,
            'data'      => $transaction->data,
        ];
    }

    /**
     * 交易退款.
     * @param string $transaction
     * @param int $amount
     */
    public static function transactionRefund(string $reference, int $amount)
    {
        $secretKey = \Yii::$app->Paystack->testSecretKey;

        $url = "https://api.paystack.co/refund";
        $fields = [
            'transaction' => $reference,
            'amount'      => $amount,
        ];
        $fields_string = http_build_query($fields);
        //open connection
        $ch = curl_init();

        //set the url, number of POST vars, POST data
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $fields_string);
        curl_setopt($ch, CURLOPT_HTTPHEADER, array(
            "Authorization: Bearer {$secretKey}",
            "Cache-Control: no-cache",
        ));

        //So that curl_exec returns the contents of the cURL; rather than echoing it
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

        //execute post
        $response = curl_exec($ch);
        $response = json_decode($response, true);

        return [
            'status'    => $response['status'],
            'message'   => $response['message'],
            'data'      => $response['data'],
        ];
    }

}