<?php

// API endpoint

// 获取 Access Token 
$clientId = 'AV215uV-cE-AZ9nd4dNWf24vzrj6UyvA3rA8FDGVW09Y531j9H3GO7FtJmphimXNwisgYNHFvW-6wYMo';
$clientSecret = 'EJb5xUSW8QtuPJeaHuOjAXl9WXp2kj4-zkym-7fXCBM-TssNhkK2FB1-iJOmxYsGcASO8zBTHaPRoJH_'; 

// PayPal API 认证 URL (沙盒环境)
$authUrl = "https://api.sandbox.paypal.com/v1/oauth2/token";

// 创建认证信息
$auth = base64_encode($clientId . ":" . $clientSecret);

// 初始化 cURL
$ch = curl_init();

// 设置 cURL 请求选项
curl_setopt($ch, CURLOPT_URL, $authUrl);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    "Authorization: Basic $auth",
    "Content-Type: application/x-www-form-urlencoded"
]);

// 设置请求体
curl_setopt($ch, CURLOPT_POSTFIELDS, "grant_type=client_credentials");

// 执行 cURL 请求
$response = curl_exec($ch);
curl_close($ch);

// 解析响应并获取访问令牌
$data = json_decode($response, true);
$accessToken = $data['access_token']; 

// Access Token and other headers

$url = "https://api.sandbox.paypal.com/v2/checkout/orders/";

// Create the request body as JSON
$data = [
    "intent" => "CAPTURE",
    "payment_source" => [
        "card" => [
            "number" => "4111111111111111", // 使用沙盒测试卡号
            "expiry" => "2028-12",
            "cvv" => "123",
            "name" => "Firstname Lastname",
            "billing_address" => [
                "address_line_1" => "123 Main St.",
                "admin_area_1" => "CA",
                "admin_area_2" => "Anytown",
                "postal_code" => "12345",
                "country_code" => "US"
            ]
        ]
    ],
    "purchase_units" => [
        [
            "reference_id" => "REFID-000-1001",
            "description" => "Description of PU1",
            "custom_id" => "CUSTOMID-1001",
            "soft_descriptor" => "SOFT-1001",
            "amount" => [
                "currency_code" => "USD",
                "value" => "100.00",
                "breakdown" => [
                    "item_total" => [
                        "currency_code" => "USD",
                        "value" => "100.00"
                    ],
                    "shipping" => [
                        "currency_code" => "USD",
                        "value" => "0"
                    ],
                    "handling" => [
                        "currency_code" => "USD",
                        "value" => "0"
                    ],
                    "tax_total" => [
                        "currency_code" => "USD",
                        "value" => "0"
                    ],
                    "shipping_discount" => [
                        "currency_code" => "USD",
                        "value" => "0"
                    ]
                ]
            ],
            "items" => [
                [
                    "name" => "VRLens2",
                    "description" => "VRLens2",
                    "sku" => "259483234816",
                    "unit_amount" => [
                        "currency_code" => "USD",
                        "value" => "50.00"
                    ],
                    "tax" => [
                        "currency_code" => "USD",
                        "value" => "0"
                    ],
                    "quantity" => "1",
                    "category" => "PHYSICAL_GOODS"
                ],
                [
                    "name" => "VRLens1",
                    "description" => "VRLens1",
                    "sku" => "259483234817",
                    "unit_amount" => [
                        "currency_code" => "USD",
                        "value" => "50.00"
                    ],
                    "tax" => [
                        "currency_code" => "USD",
                        "value" => "0"
                    ],
                    "quantity" => "1",
                    "category" => "PHYSICAL_GOODS"
                ]
            ],
            "shipping" => [
                "name" => [
                    "full_name" => "Firstname Lastname"
                ],
                "address" => [
                    "address_line_1" => "123 Main St.",
                    "admin_area_2" => "Anytown",
                    "admin_area_1" => "CA",
                    "postal_code" => "12345",
                    "country_code" => "US"
                ]
            ]
        ]
    ]
];

// Convert the data to JSON
$jsonData = json_encode($data);

// Initialize cURL session
$ch = curl_init($url);

// Set cURL options
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'Content-Type: application/json',
    'Authorization: Bearer ' . $accessToken,
    'PayPal-Request-Id: ' . $clientId
]);
curl_setopt($ch, CURLOPT_POSTFIELDS, $jsonData);

// Execute the cURL request and get the response
$response = curl_exec($ch);
 
// Check for cURL errors
if(curl_errno($ch)) {
    echo 'Curl error: ' . curl_error($ch);
} else {
    // Handle the response
    echo $response;
}

// Close cURL session
curl_close($ch);
?>


<!DOCTYPE html>
<html>
<head>
    <title>支付结果</title>
    <style>
        .container { max-width: 800px; margin: 50px auto; padding: 20px; }
        .success { color: #155724; background: #d4edda; padding: 15px; border-radius: 4px; }
        .error { color: #721c24; background: #f8d7da; padding: 15px; border-radius: 4px; }
    </style>
</head>
<body>
    <div class="container">
        <?php if(isset($error)): ?>
            <div class="error">
                <h3>交易失败</h3>
                <p>错误信息：<?= htmlspecialchars($error) ?></p>
                <?php if(isset($responseData)): ?>
                    <pre><?= json_encode($responseData, JSON_PRETTY_PRINT) ?></pre>
                <?php endif; ?>
            </div>

        <?php elseif($httpCode >= 200 && $httpCode < 300): ?>
            <div class="success">
                <h3>支付成功！</h3>
                <?php if(isset($responseData['id'])): ?>
                    <p>订单ID：<?= $responseData['id'] ?></p>
                <?php endif; ?>
                <?php 
                // 提取交易ID（Capture ID）
                $captureId = $responseData['purchase_units'][0]['payments']['captures'][0]['id'] ?? null;
                if($captureId): ?>
                    <p>交易ID：<?= $captureId ?></p>
                <?php endif; ?>
                <pre><?= json_encode($responseData, JSON_PRETTY_PRINT) ?></pre>
            </div>

        <?php else: ?>
            <div class="error">
                <h3>支付失败（HTTP <?= $httpCode ?>）</h3>
                <?php if(isset($responseData['message'])): ?>
                    <p>错误信息：<?= $responseData['message'] ?></p>
                <?php endif; ?>
                <?php if(isset($responseData['details'])): ?>
                    <ul>
                        <?php foreach($responseData['details'] as $detail): ?>
                            <li><?= $detail['field'] ?? '' ?>: <?= $detail['description'] ?? '' ?></li>
                        <?php endforeach; ?>
                    </ul>
                <?php endif; ?>
                <pre><?= json_encode($responseData, JSON_PRETTY_PRINT) ?></pre>
            </div>
        <?php endif; ?>
    </div>
</body>
</html>