package provision

import (
	"context"
	"errors"
	"testing"
)

func TestCreateNode_Success(t *testing.T) {
	h := newHarness(t)
	ctx := context.Background()

	n, err := h.svc.CreateNode(ctx, freeSpec(), "key-1")
	if err != nil {
		t.Fatalf("CreateNode: %v", err)
	}
	if n.Status != StatusProvisioning {
		t.Errorf("status = %s, want provisioning", n.Status)
	}
	if n.ProviderInstanceID == "" {
		t.Error("instance ID not recorded")
	}
	if n.Endpoint == pendingEndpoint || n.Endpoint == "" {
		t.Errorf("endpoint not updated: %q", n.Endpoint)
	}
	if h.tokens.calls != 1 {
		t.Errorf("bootstrap token issued %d times, want 1", h.tokens.calls)
	}
	if h.adapter.createCount() != 1 {
		t.Errorf("boot calls = %d, want 1", h.adapter.createCount())
	}
	if h.store.countEvents(EventProvisioned) != 1 {
		t.Errorf("provisioned events = %d, want 1", h.store.countEvents(EventProvisioned))
	}
}

func TestCreateNode_IdempotentReplay(t *testing.T) {
	h := newHarness(t)
	ctx := context.Background()

	n1, err := h.svc.CreateNode(ctx, freeSpec(), "same-key")
	if err != nil {
		t.Fatalf("first CreateNode: %v", err)
	}
	n2, err := h.svc.CreateNode(ctx, freeSpec(), "same-key")
	if err != nil {
		t.Fatalf("replay CreateNode: %v", err)
	}
	if n1.UUID != n2.UUID {
		t.Errorf("replay returned different node: %s vs %s", n1.UUID, n2.UUID)
	}
	if h.adapter.createCount() != 1 {
		t.Errorf("idempotency violated: boot called %d times, want 1", h.adapter.createCount())
	}
}

func TestCreateNode_BootFailure(t *testing.T) {
	h := newHarness(t)
	ctx := context.Background()
	h.adapter.createErr = errors.New("vendor 500")

	_, err := h.svc.CreateNode(ctx, freeSpec(), "key-boom")
	if err == nil {
		t.Fatal("expected error on boot failure")
	}
	// Node should be destroyed.
	n, _ := h.store.GetNodeByUUID(ctx, h.store.idem["key-boom"])
	if n == nil || n.Status != StatusDestroyed {
		t.Errorf("node not destroyed after boot failure: %+v", n)
	}
	if got := h.svc.FailCount(PoolConsumable); got != 1 {
		t.Errorf("fail count = %d, want 1", got)
	}
	if h.alert.count(AlertBootFailed) != 1 {
		t.Errorf("boot_failed alerts = %d, want 1", h.alert.count(AlertBootFailed))
	}
}

func TestDestroyNode_Idempotent(t *testing.T) {
	h := newHarness(t)
	ctx := context.Background()
	n, err := h.svc.CreateNode(ctx, freeSpec(), "key-d")
	if err != nil {
		t.Fatalf("CreateNode: %v", err)
	}

	if err := h.svc.DestroyNode(ctx, n.ID); err != nil {
		t.Fatalf("DestroyNode: %v", err)
	}
	if err := h.svc.DestroyNode(ctx, n.ID); err != nil {
		t.Fatalf("second DestroyNode should be no-op: %v", err)
	}
	if h.adapter.destroyCount() != 1 {
		t.Errorf("vendor destroy called %d times, want 1 (idempotent)", h.adapter.destroyCount())
	}
	got, _ := h.store.GetNode(ctx, n.ID)
	if got.Status != StatusDestroyed {
		t.Errorf("status = %s, want destroyed", got.Status)
	}
}

func TestRotateIP(t *testing.T) {
	h := newHarness(t)
	ctx := context.Background()
	n, err := h.svc.CreateNode(ctx, freeSpec(), "key-ip")
	if err != nil {
		t.Fatalf("CreateNode: %v", err)
	}
	before := h.store.version
	oldEndpoint := n.Endpoint

	updated, err := h.svc.RotateIP(ctx, n.ID)
	if err != nil {
		t.Fatalf("RotateIP: %v", err)
	}
	if updated.Endpoint == oldEndpoint {
		t.Errorf("endpoint not changed: still %s", updated.Endpoint)
	}
	if h.store.version <= before {
		t.Errorf("directory version not bumped: %d <= %d", h.store.version, before)
	}
	if h.store.countEvents(EventIPRotated) != 1 {
		t.Errorf("ip_rotated events = %d, want 1", h.store.countEvents(EventIPRotated))
	}
	stored, _ := h.store.GetNode(ctx, n.ID)
	if stored.Endpoint != updated.Endpoint {
		t.Errorf("stored endpoint %s != returned %s", stored.Endpoint, updated.Endpoint)
	}
}

func TestRotateIP_Unsupported(t *testing.T) {
	h := newHarness(t)
	ctx := context.Background()
	h.adapter.elastic = false
	n, err := h.svc.CreateNode(ctx, freeSpec(), "key-ip2")
	if err != nil {
		t.Fatalf("CreateNode: %v", err)
	}
	_, err = h.svc.RotateIP(ctx, n.ID)
	if !errors.Is(err, ErrElasticIPUnsupported) {
		t.Errorf("err = %v, want ErrElasticIPUnsupported", err)
	}
}

func TestListProviders(t *testing.T) {
	h := newHarness(t)
	ctx := context.Background()
	ps, err := h.svc.ListProviders(ctx, PoolPremium)
	if err != nil {
		t.Fatalf("ListProviders: %v", err)
	}
	if len(ps) != 1 || ps[0].Pool != PoolPremium {
		t.Errorf("premium providers = %+v, want exactly 1 premium", ps)
	}
}
