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import { createCookieSessionStorage } from "@remix-run/node";

export { getSession, commitSession, destroySession };

export interface GitHubUserInfo {
  userId: string;
  login: string;
  name?: string;
  email?: string;
  avatar_url?: string;
}

export interface HuggingFaceUserInfo {
  username: string;
  fullName?: string;
  email?: string;
  avatarUrl?: string;
}

export interface UserSession {
  github?: GitHubUserInfo;
  huggingface?: HuggingFaceUserInfo;
  isLinked: boolean;
  linkedAt?: string;
}

const sessionSecret = process.env.SESSION_SECRET;
if (!sessionSecret) {
  throw new Error('SESSION_SECRET environment variable is required');
}

const { getSession, commitSession, destroySession } = createCookieSessionStorage({
  cookie: {
    name: "__session",
    httpOnly: true,
    maxAge: 60 * 60 * 24 * 30, // 30 days
    path: "/",
    sameSite: "lax",
    secrets: [sessionSecret],
    secure: process.env.NODE_ENV === "production",
  },
});

export async function requireUserSession(request: Request): Promise<UserSession> {
  const session = await getSession(request.headers.get("Cookie"));
  const userSession = session.get("user");
  
  if (!userSession) {
    throw new Response("Unauthorized", { status: 401 });
  }
  
  return userSession;
}

export async function getUserSession(request: Request): Promise<UserSession | null> {
  const session = await getSession(request.headers.get("Cookie"));
  return session.get("user") || null;
}