{
  // Add apollo module
  modules: ['@nuxtjs/apollo'],

  // Give apollo module options
  apollo: {
    clientConfigs: {
      default: '~/apollo/client-configs/default.js'
    }
  }
}

module.exports = {
  modules: ['@nuxtjs/apollo'],
  apollo: {
    clientConfigs: {
      default: '~/apollo/client-configs/default.js',
      test: '~/apollo/client-configs/test.js'
    }
  }
}

import { ApolloLink } from 'apollo-link'
import { HttpLink } from 'apollo-link-http'
import { InMemoryCache } from 'apollo-cache-inmemory'

export default (ctx) => {
  const httpLink = new HttpLink({ uri: 'http://localhost:8000/graphql' })


  // middleware
  const middlewareLink = new ApolloLink((operation, forward) => {
    const token = process.server ? ctx.req.session : window.__NUXT__.state.session

    operation.setContext({
      headers: { authorization: `Bearer ${token}` }
    })
    return forward(operation)
  })
  const link = middlewareLink.concat(httpLink)
  return {
    link,
    cache: new InMemoryCache()
  }
}

import { ApolloLink, concat, split } from 'apollo-link'
import { HttpLink } from 'apollo-link-http'
import { InMemoryCache } from 'apollo-cache-inmemory'
import { WebSocketLink } from 'apollo-link-ws'
import { getMainDefinition } from 'apollo-utilities'
import 'subscriptions-transport-ws' // this is the default of apollo-link-ws

export default (ctx) => {
  const httpLink = new HttpLink({uri: 'https://api.graph.cool/simple/v1/' + process.env.GRAPHQL_ALIAS})
  const authMiddleware = new ApolloLink((operation, forward) => {
    const token = process.server ? ctx.req.session : window.__NUXT__.state.session
    operation.setContext({
      headers: {
        Authorization: token ? `Bearer ${token}` : null
      }
    })
    return forward(operation)
  })
  // Set up subscription
  const wsLink = new WebSocketLink({
    uri: `wss://subscriptions.graph.cool/v1/${process.env.GRAPHQL_ALIAS}`,
    options: {
      reconnect: true,
      connectionParams: () => {
        const token = process.server ? ctx.req.session : window.__NUXT__.state.session
        return {
          Authorization: token ? `Bearer ${token}` : null
        }
      }
    }
  })
  
  const link = split(
    ({query}) => {
      const {kind, operation} = getMainDefinition(query)
      return kind === 'OperationDefinition' && operation === 'subscription'
    },
    wsLink,
    httpLink
  )

  return {
    link: concat(authMiddleware, link),
    cache: new InMemoryCache()
  }
}

export default {
  actions: {
    foo (store, payload) {
      let client = this.app.apolloProvider.defaultClient
    }
  }
}

export default {
  asyncData (context) {
    let client = context.app.apolloProvider.defaultClient
  }
}

export default {
  nuxtServerInit (store, context) {
    let client = context.app.apolloProvider.defaultClient
  }
}

export default {
  methods:{
    foo(){
      // receive the associated Apollo client 
      const client = this.$apollo.getClient()

      // most likely you would call mutations like following:
      this.$apollo.mutate({mutation, variables})
    }
  }
}

export default {
  apollo: {
    foo: {
      query: fooGql,
      variables () {
        return {
          myVar: this.myVar
        }
      }
    }
  }
}