import { auth, currentUser } from "@clerk/nextjs/server";
import { NextRequest } from "next/server";
import log from "./logger";

/**
 * Get authenticated user ID from request
 * Handles both session-based auth (web) and Bearer token auth (mobile)
 *
 * For mobile apps using Clerk Expo, tokens should be passed as:
 * Authorization: Bearer <token>
 */
export async function getAuthUserId(req: NextRequest): Promise<string | null> {
  try {
    // Clerk's auth() should handle both cookies and Bearer tokens automatically
    // when the request is properly formatted
    const { userId } = await auth();

    if (userId) {
      log.debug("Authenticated user", { userId });
      return userId;
    }

    log.debug("No authentication found");

    // Log headers for debugging
    const authHeader = req.headers.get("authorization");
    log.debug("Authorization header check", {
      present: !!authHeader,
    });

    return null;
  } catch (error) {
    log.error("Authentication error", error);
    return null;
  }
}

/**
 * Simplified version that just uses Clerk's built-in auth
 * This should work with both session cookies and Bearer tokens
 */
export async function requireAuth(req: NextRequest): Promise<string> {
  const userId = await getAuthUserId(req);

  if (!userId) {
    throw new Error("Unauthorized");
  }

  return userId;
}