package handler

import (
	"net/http"
	"net/http/httptest"
	"testing"
)

func TestInterestHandler_CalculateInterest_Unauthorized(t *testing.T) {
	h := &InterestHandler{
		service:   nil,
		secretKey: "test-secret",
	}

	// No header
	req := httptest.NewRequest("POST", "/internal/calculate-interest", nil)
	rr := httptest.NewRecorder()
	h.CalculateInterest(rr, req)

	if rr.Code != http.StatusUnauthorized {
		t.Errorf("expected 401, got %d", rr.Code)
	}

	// Wrong header
	req2 := httptest.NewRequest("POST", "/internal/calculate-interest", nil)
	req2.Header.Set("X-Internal-Key", "wrong-key")
	rr2 := httptest.NewRecorder()
	h.CalculateInterest(rr2, req2)

	if rr2.Code != http.StatusUnauthorized {
		t.Errorf("expected 401, got %d", rr2.Code)
	}
}