import { type ClassValue, clsx } from "clsx";
import { twMerge } from "tailwind-merge";
import { NextRequest, NextResponse } from "next/server";
import { validateApiKey } from "@/lib/auth/api-key";

export function cn(...inputs: ClassValue[]) {
  return twMerge(clsx(inputs));
}

/**
 * Get today's date as YYYY-MM-DD string
 */
export function getTodayDateString(): string {
  return new Date().toISOString().split("T")[0];
}

/**
 * Authenticate an API request with Bearer token
 * Returns the claw object if authenticated, or a 401 NextResponse if not
 */
export async function authenticateRequest(req: NextRequest) {
  const authHeader = req.headers.get("authorization");
  if (!authHeader?.startsWith("Bearer ")) {
    return NextResponse.json(
      { error: "Missing or invalid authorization header" },
      { status: 401 }
    );
  }

  const apiKey = authHeader.slice(7);
  const claw = await validateApiKey(apiKey);
  if (!claw) {
    return NextResponse.json({ error: "Invalid API key" }, { status: 401 });
  }

  return { claw };
}