package helper

import (
	"os"
	"testing"
	"time"
)

func TestGetEnv(t *testing.T) {
	os.Setenv("GO_TEST_VALUE", "123")
	env := GetEnv("GO_TEST_VALUE", "")
	if env != "123" {
		t.Error("GetEnv() cannot find value")
	}
}

func TestGetEnvEmpty(t *testing.T) {
	env := GetEnv("GO_TEST_NOVALUE", "123")
	if env != "123" {
		t.Errorf("GetEnv() did not use default value: want=%s got=%s", "123", env)
	}
}

func TestCacheCreate(t *testing.T) {
	cacheFetch := func(key string) (any, error) {
		return "123", nil
	}

	cache := NewCache(1*time.Second, cacheFetch)
	if cache.ttl != 1*time.Second {
		t.Error("Error creating cache")
	}
}

func TestCacheFunction(t *testing.T) {
	counter := 1
	cacheFetch := func(key string) (any, error) {
		counter += 1
		return counter, nil
	}

	cache := NewCache(1*time.Millisecond, cacheFetch)
	valInit, err := cache.Get("TEST")
	valCache, err := cache.Get("TEST")
	time.Sleep(1 * time.Millisecond)
	valNoCache, err := cache.Get("TEST")
	if err != nil {
		t.Errorf("Error getting key from Cache: %e", err)
	}
	if valInit != valCache || valCache != 2 || valNoCache != 3 {
		t.Error("Caching does not resprect ttl.")
	}
}