<?php

/**
 * PHP Mikrotik Billing (https://github.com/hotspotbilling/phpnuxbill/)
 *
 * Payment Gateway PippraPay (https://piprapay.readme.io/)
 **/

function pipprapay_validate_config()
{
    global $config;
    if (empty($config['pipprapay_api_key'])) {
        sendTelegram("PippraPay payment gateway not configured");
        r2(U . 'order/package', 'w', Lang::T("Admin has not yet setup PippraPay payment gateway, please tell admin"));
    }
}

function pipprapay_show_config()
{
    global $ui, $config;
    $ui->assign('_title', 'PippraPay - Payment Gateway');
    $ui->display('pipprapay.tpl');
}

function pipprapay_save_config()
{
    global $admin;
    $pipprapay_api_key = _post('pipprapay_api_key');
    $pipprapay_base_url = _post('pipprapay_base_url');
    
    // Save API Key
    $d = ORM::for_table('tbl_appconfig')->where('setting', 'pipprapay_api_key')->find_one();
    if ($d) {
        $d->value = $pipprapay_api_key;
        $d->save();
    } else {
        $d = ORM::for_table('tbl_appconfig')->create();
        $d->setting = 'pipprapay_api_key';
        $d->value = $pipprapay_api_key;
        $d->save();
    }
    
    // Save Base URL
    $d = ORM::for_table('tbl_appconfig')->where('setting', 'pipprapay_base_url')->find_one();
    if ($d) {
        $d->value = $pipprapay_base_url;
        $d->save();
    } else {
        $d = ORM::for_table('tbl_appconfig')->create();
        $d->setting = 'pipprapay_base_url';
        $d->value = $pipprapay_base_url;
        $d->save();
    }
    
    _log('[' . $admin['username'] . ']: PippraPay ' . Lang::T('Settings_Saved_Successfully'), 'Admin', $admin['id']);
    r2(U . 'paymentgateway/pipprapay', 's', Lang::T('Settings_Saved_Successfully'));
}

function pipprapay_create_transaction($trx, $user)
{
    global $config;
    
    pipprapay_validate_config();
    
    $callbackUrl = U . 'callback/pipprapay';
    $redirectUrl = U . 'order/view/' . $trx['id'] . '/check';
    
    $payload = [
        'amount' => $trx['price'] * 100, // Convert to kobo (assuming price is in main currency unit)
        'currency' => 'NGN',
        'email' => $user['email'],
        'invoice_id' => $trx['id'],
        'description' => 'Payment for invoice #' . $trx['id'],
        'callback_url' => $callbackUrl,
        'redirect_url' => $redirectUrl,
        'metadata' => [
            'invoice_id' => $trx['id'],
            'customer_id' => $user['id'],
            'customer_username' => $user['username'],
            'system' => 'NuxBill'
        ]
    ];
    
    $result = pipprapay_api_call('/create-charge', $payload);
    
    if (!$result['success']) {
        sendTelegram("PippraPay payment failed\n\n" . json_encode($result, JSON_PRETTY_PRINT));
        r2(U . 'order/package', 'e', Lang::T("Failed to create transaction. " . $result['error']));
    }
    
    $paymentData = $result['data'];
    
    if ($paymentData['status'] === 'success' && !empty($paymentData['data']['checkout_url'])) {
        $d = ORM::for_table('tbl_payment_gateway')
            ->where('username', $user['username'])
            ->where('status', 1)
            ->find_one();
        $d->gateway_trx_id = $paymentData['data']['transaction_id'] ?? $paymentData['data']['reference'];
        $d->pg_url_payment = $paymentData['data']['checkout_url'];
        $d->pg_request = json_encode($paymentData);
        $d->expired_date = date('Y-m-d H:i:s', strtotime('+ 24 HOURS'));
        $d->save();
        
        header('Location: ' . $paymentData['data']['checkout_url']);
        exit();
    } else {
        sendTelegram("PippraPay payment creation failed\n\n" . json_encode($paymentData, JSON_PRETTY_PRINT));
        r2(U . 'order/package', 'e', Lang::T("Failed to create payment: " . ($paymentData['message'] ?? 'Unknown error')));
    }
}

function pipprapay_get_status($trx, $user)
{
    global $config;
    
    if (empty($trx['gateway_trx_id'])) {
        r2(U . "order/view/" . $trx['id'], 'e', Lang::T("Transaction ID not found"));
    }
    
    $result = pipprapay_api_call('/verify-payments', ['transaction_id' => $trx['gateway_trx_id']]);
    
    if (!$result['success']) {
        sendTelegram("PippraPay payment verification failed\n\n" . json_encode($result, JSON_PRETTY_PRINT));
        r2(U . "order/view/" . $trx['id'], 'e', Lang::T("Failed to verify transaction. " . $result['error']));
    }
    
    $verificationData = $result['data'];
    
    if ($trx['status'] == 2) {
        r2(U . "order/view/" . $trx['id'], 'd', Lang::T("Transaction has been paid."));
    }
    
    // Check payment status based on PippraPay response structure
    $paymentStatus = strtolower($verificationData['data']['status'] ?? 'pending');
    
    if ($paymentStatus == 'success' || $paymentStatus == 'completed') {
        if (!Package::rechargeUser($user['id'], $trx['routers'], $trx['plan_id'], $trx['gateway'], 'PippraPay')) {
            r2(U . "order/view/" . $trx['id'], 'd', Lang::T("Failed to activate your Package, try again later."));
        }
        
        $trx->pg_paid_response = json_encode($verificationData);
        $trx->payment_method = 'PippraPay';
        $trx->payment_channel = 'PippraPay';
        $trx->paid_date = date('Y-m-d H:i:s');
        $trx->status = 2;
        $trx->save();

        r2(U . "order/view/" . $trx['id'], 's', Lang::T("Transaction has been paid."));
    } elseif ($paymentStatus == 'failed' || $paymentStatus == 'cancelled') {
        r2(U . "order/view/" . $trx['id'], 'e', Lang::T("Payment failed or was cancelled."));
    } else {
        r2(U . "order/view/" . $trx['id'], 'w', Lang::T("Transaction still pending."));
    }
}

// Callback handler
function pipprapay_payment_notification()
{
    $input = file_get_contents('php://input');
    $data = json_decode($input, true);
    
    if (empty($data) || !isset($data['transaction_id'])) {
        http_response_code(400);
        die('Invalid IPN data');
    }
    
    $transactionId = $data['transaction_id'];
    $status = strtolower($data['status'] ?? 'pending');
    $invoiceId = $data['invoice_id'] ?? '';
    $amount = $data['amount'] ?? 0;
    
    // Verify the payment
    $result = pipprapay_api_call('/verify-payments', ['transaction_id' => $transactionId]);
    
    if (!$result['success']) {
        http_response_code(400);
        die('Verification failed: ' . $result['error']);
    }
    
    $verificationData = $result['data'];
    $verifiedStatus = strtolower($verificationData['data']['status'] ?? 'pending');
    
    // Find the transaction
    $trx = ORM::for_table('tbl_payment_gateway')
        ->where('gateway_trx_id', $transactionId)
        ->find_one();
    
    if (!$trx) {
        http_response_code(404);
        die('Transaction not found');
    }
    
    // Update transaction based on status
    if ($verifiedStatus == 'success' || $verifiedStatus == 'completed') {
        $user = ORM::for_table('tbl_customers')->where('username', $trx['username'])->find_one();
        
        if ($user && $trx['status'] != 2) {
            if (Package::rechargeUser($user['id'], $trx['routers'], $trx['plan_id'], $trx['gateway'], 'PippraPay')) {
                $trx->pg_paid_response = json_encode($verificationData);
                $trx->payment_method = 'PippraPay';
                $trx->payment_channel = 'PippraPay';
                $trx->paid_date = date('Y-m-d H:i:s');
                $trx->status = 2;
                $trx->save();
                
                sendTelegram("PippraPay payment successful for invoice: " . $invoiceId);
            }
        }
    }
    
    http_response_code(200);
    echo 'OK';
}

function pipprapay_api_call($endpoint, $payload)
{
    global $config;
    
    $baseUrl = $config['pipprapay_base_url'] ?? 'https://pay.wifibills.com/api';
    $url = rtrim($baseUrl, '/') . $endpoint;
    
    $headers = [
        'Authorization: Bearer ' . $config['pipprapay_api_key'],
        'Content-Type: application/json',
        'Accept: application/json'
    ];
    
    $ch = curl_init();
    
    curl_setopt_array($ch, [
        CURLOPT_URL => $url,
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_POST => true,
        CURLOPT_POSTFIELDS => json_encode($payload),
        CURLOPT_HTTPHEADER => $headers,
        CURLOPT_TIMEOUT => 30,
        CURLOPT_SSL_VERIFYPEER => true,
        CURLOPT_USERAGENT => 'NuxBill-PippraPay/1.0'
    ]);
    
    $response = curl_exec($ch);
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    $error = curl_error($ch);
    curl_close($ch);
    
    if ($error) {
        return [
            'success' => false,
            'error' => 'cURL Error: ' . $error
        ];
    }
    
    $decodedResponse = json_decode($response, true);
    
    if ($httpCode !== 200) {
        return [
            'success' => false,
            'error' => 'HTTP Error: ' . $httpCode,
            'response' => $decodedResponse
        ];
    }
    
    if (json_last_error() !== JSON_ERROR_NONE) {
        return [
            'success' => false,
            'error' => 'Invalid JSON response'
        ];
    }
    
    return [
        'success' => true,
        'data' => $decodedResponse
    ];
}

function pipprapay_get_server()
{
    global $config;
    return $config['pipprapay_base_url'] ?? 'https://pay.wifibills.com/api';
}
?>