package main

// Queue for pending authentication requests

import (
	"log"
	"math/rand"
	"time"

	"github.com/oklog/ulid"
)

type AuthenticationQueue struct {
	requestMap  map[string]*AuthRequest
	requestChan chan *AuthRequest
	tokenChan   chan *AuthToken
}

func (q *AuthenticationQueue) QueueRequest(r *AuthRequest) {
	q.requestChan <- r
}

// Should be executed by the goroutine that watches
// AuthenticationQueue.requestChan to be thread safe
func (q *AuthenticationQueue) queueRequest(r *AuthRequest) error {
	t := time.Unix(1000000, 0)
	entropy := ulid.Monotonic(rand.New(rand.NewSource(t.UnixNano())), 0)

	ulidID := ulid.MustNew(ulid.Timestamp(t), entropy)
	ID := ulidID.String()

	err := r.SetId(ID)

	if err != nil {
		return err
	}

	q.requestMap[ID] = r

	log.Println("Queued request by id: ", ID)

	return nil
}

func (q *AuthenticationQueue) startRequestChanListener() {
	go func() {
		for {
			var req *AuthRequest = <-q.requestChan

			q.queueRequest(req)
		}
	}()
}