package controller

import (
	"errors"
	"testing"

	apierrors "k8s.io/apimachinery/pkg/api/errors"
	"k8s.io/apimachinery/pkg/api/meta"
	"k8s.io/apimachinery/pkg/runtime/schema"

	terdutv1alpha1 "git.ryuvia.com/niklas/terdut-operator/api/v1alpha1"
)

// These exercise classifyClusterGetError directly, against hand-constructed
// errors, rather than through envtest -- the point is the classification
// logic, not a real Get, and the "CRD not installed" case specifically
// can't be produced in the shared envtest suite (its CRDs, stub included,
// are always installed for the whole suite's lifetime).

func TestClassifyClusterGetError_CRDNotInstalled(t *testing.T) {
	noMatch := &meta.NoKindMatchError{GroupKind: schema.GroupKind{Group: "acid.zalan.do", Kind: "postgresql"}}

	got := classifyClusterGetError(noMatch, "terdut-postgres", "oncall")
	if got.reason != terdutv1alpha1.ReasonPostgresOperatorCRDNotInstalled {
		t.Errorf("reason = %q, want %q", got.reason, terdutv1alpha1.ReasonPostgresOperatorCRDNotInstalled)
	}
}

func TestClassifyClusterGetError_ClusterNotFound(t *testing.T) {
	notFound := apierrors.NewNotFound(schema.GroupResource{Group: "acid.zalan.do", Resource: "postgresqls"}, "terdut-postgres")

	got := classifyClusterGetError(notFound, "terdut-postgres", "oncall")
	if got.reason != terdutv1alpha1.ReasonPostgresClusterNotFound {
		t.Errorf("reason = %q, want %q", got.reason, terdutv1alpha1.ReasonPostgresClusterNotFound)
	}
}

func TestClassifyClusterGetError_OtherErrorStillReturnsACondition(t *testing.T) {
	// Not one of the two classified cases -- still returns a databaseError
	// (Reconcile treats every databaseError as wait-and-retry today; see
	// the function's own comment on why), never nil, so a caller can't
	// accidentally treat an unclassified error as success.
	got := classifyClusterGetError(errors.New("etcd is on fire"), "terdut-postgres", "oncall")
	if got == nil {
		t.Fatal("classifyClusterGetError returned nil for an unclassified error")
	}
}