'use strict'

const fastify = require('fastify')
const mercurius = require('mercurius')
const cache = require('mercurius-cache')

const app = fastify({ logger: true })

const schema = `
  type Query {
    add(x: Int, y: Int): Int
    hello: String
  }
`

const resolvers = {
  Query: {
    async add (_, { x, y }, { reply }) {
      reply.log.info('add called')
      for (let i = 0; i < 10000000; i++) {} // something that takes time
      return x + y
    }
  }
}

app.register(mercurius, {
  schema,
  resolvers
})


// cache query "add" responses for 10 seconds
app.register(cache, {
  ttl: 10,
  policy: {
    Query: {
      add: true
      // note: it cache "add" but it doesn't cache "hello"
    }
  }
})

app.listen(3000)

// Use the following to test
// curl -X POST -H 'content-type: application/json' -d '{ "query": "{ add(x: 2, y: 2) }" }' localhost:3000/graphql

  ttl: 10

  policy: {
    Query: {
      add: true
    }
  }

  policy: {
    Query: {
      welcome: {
        extendKey: function (source, args, context, info) {
          return context.userId ? `user:${context.userId}` : undefined
        }
      }
    }
  }

  all: true

  storage: {
    async get (key) {
      // fetch by key from storage
      return storage.get(key)
    },
    async set (key, value) {
      // set the value in the storage
      return storage.set(key, value)
    }
  }

  onHit (type, fieldName) {
    console.log(`hit ${type} ${fieldName}`) 
  }

  onMiss (type, fieldName) {
    console.log(`miss ${type} ${fieldName}`)
  }

  skip (self, arg, ctx, info) {
    if (ctx.reply.request.headers.authorization) {
      return true
    }
    return false
  }