import * as SecureStore from "expo-secure-store";
import type { MobileUser } from "../types/auth";

const ACCESS_TOKEN_KEY = "cc_access_token";
const REFRESH_TOKEN_KEY = "cc_refresh_token";
const USER_KEY = "cc_user";

export async function saveSession(
  accessToken: string,
  refreshToken: string,
  user: MobileUser
): Promise<void> {
  await Promise.all([
    SecureStore.setItemAsync(ACCESS_TOKEN_KEY, accessToken),
    SecureStore.setItemAsync(REFRESH_TOKEN_KEY, refreshToken),
    SecureStore.setItemAsync(USER_KEY, JSON.stringify(user)),
  ]);
}

export async function readSession(): Promise<{
  accessToken: string | null;
  refreshToken: string | null;
  user: MobileUser | null;
}> {
  const [accessToken, refreshToken, userRaw] = await Promise.all([
    SecureStore.getItemAsync(ACCESS_TOKEN_KEY),
    SecureStore.getItemAsync(REFRESH_TOKEN_KEY),
    SecureStore.getItemAsync(USER_KEY),
  ]);

  let user: MobileUser | null = null;
  if (userRaw) {
    try {
      user = JSON.parse(userRaw) as MobileUser;
    } catch {
      user = null;
    }
  }

  return { accessToken, refreshToken, user };
}

export async function clearSession(): Promise<void> {
  await Promise.all([
    SecureStore.deleteItemAsync(ACCESS_TOKEN_KEY),
    SecureStore.deleteItemAsync(REFRESH_TOKEN_KEY),
    SecureStore.deleteItemAsync(USER_KEY),
  ]);
}