import { ApolloClient, HttpLink, InMemoryCache } from '@apollo/client'
import {SetContextLink} from '@apollo/client/link/context'
import { userManager } from './auth/oidcClient'

const uri = import.meta.env.VITE_GRAPHQL_URI ?? 'https://localhost:5001/graphql'

const httpLink = new HttpLink({ uri })

const authLink = new SetContextLink(async ({ headers }, _) => {
  if (!userManager) return { headers }
  try {
    const user = await userManager.getUser()
    const token = user?.access_token
    if (!token) return { headers }
    return {
      headers: {
        ...headers,
        Authorization: `Bearer ${token}`,
      },
    }
  } catch (error) {
    console.warn('Failed to load user for auth header', error)
    return { headers }
  }
})

export const apolloClient = new ApolloClient({
  link: authLink.concat(httpLink),
  cache: new InMemoryCache(),
})