package pokecache_test

import (
	"testing"
	"time"

	"github.com/StevanFreeborn/pokedexcli/internal/pokecache"
)

func TestNewCache(t *testing.T) {
	t.Run("it should return new initialized cache", func(t *testing.T) {
		cache := pokecache.NewCache(5 * time.Second)
		defer cache.Stop()

		if cache == nil {
			t.Errorf("expected result to be non nil value")
		}
	})

	t.Run("it should start reaping loop", func(t *testing.T) {
		interval := 1 * time.Second
		wait := interval + 1
		key := "key"
		bytes := []byte("Hello World")

		cache := pokecache.NewCache(1 * time.Second)
		defer cache.Stop()

		cache.Add(key, bytes)

		time.Sleep(wait)

		_, found := cache.Get(key)

		if found {
			t.Errorf("expected entry for key %s to have been reaped", key)
		}
	})
}

func TestAdd(t *testing.T) {
	t.Run("it should add entry to cache and allow retrieving entry", func(t *testing.T) {
		key := "key"
		bytes := []byte("Hello World")

		cache := pokecache.NewCache(5 * time.Second)
		defer cache.Stop()

		cache.Add(key, bytes)

		result, found := cache.Get(key)

		if !found {
			t.Errorf("expected to find entry for key %s", key)
		}

		expected := string(bytes)
		strResult := string(result)

		if strResult != expected {
			t.Errorf("expected to find value %s for key %s but received %s", expected, key, strResult)
		}
	})
}