import { type NLoginType, NUser, useNostrLogin } from '@nostrify/react/login';
import { useNostr } from '@nostrify/react';
import { useCallback, useMemo } from 'react';

import { useAuthor } from './useAuthor.ts';
import { AmberSigner } from '@/lib/amber';
import { CapacitorAmberSigner, isNativeAmberAvailable } from '@/lib/capacitorAmberSigner';
import type { AmberLoginType } from './useLoginActions';

/** Extended login type that includes Amber */
type ExtendedLoginType = NLoginType | AmberLoginType;

export function useCurrentUser() {
  const { nostr } = useNostr();
  const { logins } = useNostrLogin();

  const loginToUser = useCallback((login: ExtendedLoginType): NUser  => {
    switch (login.type) {
      case 'nsec': // Nostr login with secret key
        return NUser.fromNsecLogin(login);
      case 'bunker': // Nostr login with NIP-46 "bunker://" URI
        return NUser.fromBunkerLogin(login, nostr);
      case 'extension': // Nostr login with NIP-07 browser extension
        return NUser.fromExtensionLogin(login);
      case 'x-amber': { // Nostr login with Amber (NIP-55)
        const amberLogin = login as AmberLoginType;
        // On Capacitor (ZapStore APK) use the native plugin signer so all
        // signing operations go through Amber via native intents.
        // On web/PWA fall back to the URL-redirect based AmberSigner.
        // Use the reliable module-level Capacitor check (not window.Capacitor).
        const signer = isNativeAmberAvailable()
          ? new CapacitorAmberSigner(amberLogin.pubkey)
          : new AmberSigner(amberLogin.pubkey);
        return new NUser('x-amber', amberLogin.pubkey, signer);
      }
      // Other login types can be defined here
      default:
        throw new Error(`Unsupported login type: ${(login as ExtendedLoginType).type}`);
    }
  }, [nostr]);

  const users = useMemo(() => {
    const users: NUser[] = [];

    for (const login of logins) {
      try {
        const user = loginToUser(login);
        users.push(user);
      } catch (error) {
        console.warn('Skipped invalid login', login.id, error);
      }
    }

    return users;
  }, [logins, loginToUser]);

  const user = users[0] as NUser | undefined;
  const author = useAuthor(user?.pubkey);

  return {
    user,
    users,
    isLoadingProfile: author.isLoading,
    ...author.data,
  };
}