if (process.env.NODE_ENV !== "test")
    require("server-only");
import { headers } from "next/headers";
import { createRequestId } from "@/lib/server/errors";

function parseForwardedIp(value: string | null): string | null {
    if (!value) return null;
    const first = value.split(",")[0]?.trim();
    if (!first) return null;
    return first.slice(0, 64);
}

function sanitizeRequestId(value: string | null) {
    if (!value) return null;
    const trimmed = value.trim();
    if (!trimmed) return null;
    const normalized = trimmed.slice(0, 96).replace(/[^a-zA-Z0-9._:-]/g, "");
    return normalized || null;
}

export async function getRequestMeta() {
    const headerStore = await headers();
    const forwardedRequestId = sanitizeRequestId(headerStore.get("x-request-id"));
    const requestId = forwardedRequestId || createRequestId();
    const ip = parseForwardedIp(headerStore.get("x-forwarded-for")) || parseForwardedIp(headerStore.get("x-real-ip"));
    return {
        requestId,
        ip,
        userAgent: headerStore.get("user-agent")
    };
}