import type { AuthProviderInfo, RecordModel } from 'pocketbase';
import { usePocketbase } from './usePocketbase';

export interface LoggedInUser extends RecordModel {
  id: string;
  email: string;
  emailVisibility: boolean;
  verified: boolean;
  name: string;
  avatar?: string;
  created: Date;
  updated: Date;
}

const user = ref<LoggedInUser | null>(null);
const loading = ref<boolean>(false);
const error = ref<Error | null>(null);

export const useAuth = () => {
  const pb = usePocketbase();
  const router = useRouter();

  const userCollection = 'users';

  const isAuthenticated = computed<boolean>(() => pb.authStore.isValid && !!user.value);

  const initAuth = async () => {
    user.value = pb.authStore.record as LoggedInUser;
    pb.authStore.onChange((_token, model) => (user.value = model as LoggedInUser));
  };

  const authProviders = async (): Promise<AuthProviderInfo[]> => {
    const authMethods = await pb.collection(userCollection).listAuthMethods();
    return authMethods.oauth2.enabled ? authMethods.oauth2.providers : [];
  };

  const login = async (provider: string) => {
    loading.value = true;
    error.value = null;
    try {
      const providers = await authProviders();
      const providerData = providers.find((p) => p.name === provider);
      if (!providerData) {
        throw new Error(`${provider} OAuth is not configured`);
      }
      const response = await pb.collection(userCollection).authWithOAuth2({ provider });
      user.value = response.record as LoggedInUser;
    } catch (pbError) {
      error.value = pbError as Error;
    } finally {
      loading.value = false;
    }
  };

  const refreshAuth = async () => await pb.collection(userCollection).authRefresh();

  const handleOAuthCallback = async () => {
    user.value = pb.authStore.record as LoggedInUser;
    if (isAuthenticated.value) {
      await router.push('/dashboard');
    } else {
      await router.push('/');
    }
  };

  const logout = () => {
    pb.authStore.clear();
    user.value = null;
    error.value = null;
  };

  return {
    user,
    loading,
    error,
    isAuthenticated,
    login,
    logout,
    initAuth,
    refreshAuth,
    handleOAuthCallback,
    authProviders,
  };
};