<?php

//https://manjapro.net/paymentlink/post/winpay_report.php?action=transactions&from=2026-06-01&to=2026-06-5
//https://manjapro.net/paymentlink/post/winpay_report.php?action=balance&accountNo=1747356
//https://manjapro.net/paymentlink/post/winpay_report.php?winpay_report.php?action=statement&accountNo=XXX&token=XXX

require __DIR__ . '/../../config/connect.php';

$partnerId = "bb3736e5-eb14-4e7f-b62d-10db909db794";
$baseUrl   = "https://snap.winpay.id";
$privateKeyPath = __DIR__ . "/private_key_prod.pem";

// =========================
// HELPER
// =========================
function getTimestamp()
{
    return date("c");
}

// 🔥 FORMAT ISO8601 AMAN
function formatISO8601($date, $end = false)
{
    $time = $end ? "23:59:59" : "00:00:00";
    return date("Y-m-d\\T{$time}P", strtotime($date));
}

// 🔥 VALIDASI RANGE MAX 1 BULAN
function validateRange($from, $to)
{
    $start = strtotime($from);
    $end   = strtotime($to);

    if (($end - $start) > (31 * 24 * 60 * 60)) {
        die(json_encode([
            "error" => "Range maksimal 1 bulan"
        ], JSON_PRETTY_PRINT));
    }
}

function generateSignature($method, $endpoint, $body, $timestamp, $privateKeyPath, &$debug = [])
{
    $hashedBody = strtolower(bin2hex(hash('sha256', $body, true)));

    $stringToSign = implode(":", [
        $method,
        $endpoint,
        $hashedBody,
        $timestamp
    ]);

    $privateKey = openssl_pkey_get_private(file_get_contents($privateKeyPath));

    if (!$privateKey) {
        die(json_encode(["error" => "Private key tidak valid"]));
    }

    openssl_sign($stringToSign, $signature, $privateKey, OPENSSL_ALGO_SHA256);

    $signatureBase64 = base64_encode($signature);

    // DEBUG
    $debug['string_to_sign'] = $stringToSign;
    $debug['hashed_body']    = $hashedBody;
    $debug['signature']      = $signatureBase64;

    return $signatureBase64;
}

// 🔥 CURL DETAIL
function curlPost($url, $headers, $body)
{
    $ch = curl_init();

    curl_setopt_array($ch, [
        CURLOPT_URL => $url,
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_POST => true,
        CURLOPT_POSTFIELDS => $body,
        CURLOPT_HTTPHEADER => $headers,
        CURLOPT_HEADER => true
    ]);

    $response = curl_exec($ch);

    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    $headerSize = curl_getinfo($ch, CURLINFO_HEADER_SIZE);

    $responseHeader = substr($response, 0, $headerSize);
    $responseBody   = substr($response, $headerSize);

    $error = curl_error($ch);

    curl_close($ch);

    return [
        "http_code" => $httpCode,
        "header" => $responseHeader,
        "body" => $responseBody,
        "error" => $error
    ];
}

function hitWinpay($method, $endpoint, $body, $baseUrl, $partnerId, $privateKeyPath)
{
    $timestamp  = getTimestamp();
    $externalId = time() . rand(1000, 9999);

    $jsonBody = json_encode($body, JSON_UNESCAPED_SLASHES);

    $signature = generateSignature(
        $method,
        $endpoint,
        $jsonBody,
        $timestamp,
        $privateKeyPath
    );

    $headers = [
        "Content-Type: application/json",
        "X-TIMESTAMP: $timestamp",
        "X-SIGNATURE: $signature",
        "X-PARTNER-ID: $partnerId",
        "X-EXTERNAL-ID: $externalId",
        "CHANNEL-ID: WEB"
    ];

    $res = curlPost($baseUrl . $endpoint, $headers, $jsonBody);

    // 🔥 kalau curl error
    if (!empty($res['error'])) {
        return json_encode([
            "status" => false,
            "error" => $res['error']
        ]);
    }

    // 🔥 return PURE response dari Winpay
    return $res['body'];
}

// =========================
// ROUTER
// =========================
$action = $_GET['action'] ?? '';

// =========================
// BALANCE
// =========================
if ($action === 'balance') {

    $accountNo = $_GET['accountNo'] ?? '';

    $body = [
        "partnerReferenceNo" => uniqid(),
        "accountNo" => $accountNo,
        "balanceTypes" => ["Transaction", "Settlement"]
    ];

    echo hitWinpay("POST", "/v1.0/balance-inquiry", $body, $baseUrl, $partnerId, $privateKeyPath);
    exit;
}

// =========================
// TRANSACTIONS
// =========================
if ($action === 'transactions') {

    $fromRaw = $_GET['from'] ?? date('Y-m-01');
    $toRaw   = $_GET['to'] ?? date('Y-m-d');

    $from = formatISO8601($fromRaw);
    $to   = formatISO8601($toRaw, true);

    validateRange($from, $to);

    $page  = $_GET['page'] ?? 1;
    $limit = $_GET['limit'] ?? 100;

    $body = [
        "partnerReferenceNo" => "REF" . time(),
        "fromDateTime" => $from,
        "toDateTime" => $to,
        "pageSize" => (int)$limit,
        "pageNumber" => (int)$page
    ];

    echo hitWinpay("POST", "/v1.0/transaction-history-list", $body, $baseUrl, $partnerId, $privateKeyPath);
    exit;
}

// =========================
// STATEMENT
// =========================
if ($action === 'statement') {

    $accountNo = $_GET['accountNo'] ?? '';
    $token     = $_GET['token'] ?? '';

    $fromRaw = $_GET['from'] ?? date('Y-m-01');
    $toRaw   = $_GET['to'] ?? date('Y-m-d');

    $from = formatISO8601($fromRaw);
    $to   = formatISO8601($toRaw, true);

    validateRange($from, $to);

    $page  = $_GET['page'] ?? 1;
    $limit = $_GET['limit'] ?? 10;

    $body = [
        "partnerReferenceNo" => "REF" . time(),
        "bankCardToken" => $token,
        "accountNo" => $accountNo,
        "fromDateTime" => $from,
        "toDateTime" => $to,
        "additionalInfo" => [
            "pageSize" => (string)$limit,
            "pageNumber" => (string)$page
        ]
    ];

    echo hitWinpay("POST", "/v1.0/bank-statement", $body, $baseUrl, $partnerId, $privateKeyPath);
    exit;
}

// =========================
// DEFAULT
// =========================
echo json_encode([
    "status" => false,
    "message" => "Invalid action",
    "available" => ["balance","transactions","statement"]
], JSON_PRETTY_PRINT);