import { hostApiFetch } from '@/lib/host-api';
import {
  normalizeUserSyncBootstrap,
  toUserSyncPartner,
  toUserSyncPreferences,
  type UserSyncBootstrap,
  type UserSyncPartner,
  type UserSyncPreferences,
} from '../../shared/user-sync';

type UserSyncBootstrapResponse = {
  success: boolean;
  error?: string;
  bootstrap?: unknown;
};

function requireBootstrapResponse(response: UserSyncBootstrapResponse, fallback: string): UserSyncBootstrap {
  if (!response.success || !response.bootstrap) {
    throw new Error(response.error || fallback);
  }
  return normalizeUserSyncBootstrap(response.bootstrap);
}

export async function fetchUserSyncBootstrap(accessToken: string): Promise<UserSyncBootstrap> {
  const response = await hostApiFetch<UserSyncBootstrapResponse>('/api/user-sync/bootstrap', {
    headers: { 'x-niancode-access-token': accessToken },
  });
  return requireBootstrapResponse(response, 'Failed to fetch user sync bootstrap');
}

export async function pushUserSyncPreferences(
  accessToken: string,
  preferences: UserSyncPreferences,
): Promise<UserSyncBootstrap> {
  const response = await hostApiFetch<UserSyncBootstrapResponse>('/api/user-sync/preferences', {
    method: 'PUT',
    headers: { 'x-niancode-access-token': accessToken },
    body: JSON.stringify(toUserSyncPreferences(preferences)),
  });
  return requireBootstrapResponse(response, 'Failed to push user preferences');
}

export async function pushUserSyncPartner(
  accessToken: string,
  partner: UserSyncPartner,
): Promise<UserSyncBootstrap> {
  const response = await hostApiFetch<UserSyncBootstrapResponse>('/api/user-sync/partners', {
    method: 'POST',
    headers: { 'x-niancode-access-token': accessToken },
    body: JSON.stringify(toUserSyncPartner(partner)),
  });
  return requireBootstrapResponse(response, 'Failed to push user partner');
}