package main

import (
	"context"
	"strconv"
	"testing"
	"time"
)

func TestQueue(t *testing.T) {
	t.Parallel()
	ctx, can := context.WithTimeout(context.Background(), time.Second*10)
	defer can()

	q, err := NewQueue(ctx, "", NewTestDriver(t))
	if err != nil {
		t.Fatal(err)
	}
	qOther, _ := NewQueue(ctx, "other", q.driver)

	if reservation, _, err := q.syn(ctx); reservation != nil {
		t.Errorf("able to syn before any enqueues created: %v", err)
	} else {
		t.Logf("sync before enqueues: %v", err)
	}

	t.Run("enqueue", func(t *testing.T) {
		for i := 0; i < 39; i++ {
			if err := q.Enqueue(ctx, []byte(strconv.Itoa(i))); err != nil {
				t.Fatal(i, err)
			}
		}
	})

	if err := qOther.Enqueue(ctx, []byte(strconv.Itoa(100))); err != nil {
		t.Fatal(err)
	}

	t.Run("syn ack", func(t *testing.T) {
		found := map[string]struct{}{}
		for i := 0; i < 39; i++ {
			if reservation, b, err := q.Syn(ctx); err != nil {
				t.Fatal(i, "syn err", err)
			} else if _, ok := found[string(b)]; ok {
				t.Errorf("syn'd %q twice (%+v)", b, found)
			} else if err := q.Ack(ctx, reservation); err != nil {
				t.Fatal(i, "failed to ack", err)
			} else {
				found[string(b)] = struct{}{}
			}
		}
	})

	if reservation, _, err := q.syn(ctx); reservation != nil {
		t.Errorf("able to syn 1 more message than created: %v", err)
	} else if reservation, _, err := qOther.syn(ctx); reservation == nil {
		t.Errorf("unable to syn from other topic: %v", err)
	} else {
		t.Logf("empty q.syn = %v", err)
	}

	t.Run("noop", func(t *testing.T) {
		q := NewNoopQueue()
		if err := q.Enqueue(nil, nil); err != nil {
			t.Error(err)
		}
		if _, _, err := q.Syn(nil); err != nil {
			t.Error(err)
		}
		if err := q.Ack(nil, ""); err != nil {
			t.Error(err)
		}
	})
}