package adapters

import (
	"context"
	"strings"
	"testing"
)

func TestTheTwoShapesAreSelectedByVendor(t *testing.T) {
	static, err := For("anthropic-api-key")
	if err != nil {
		t.Fatal(err)
	}
	if static.Shape() != StaticKey {
		t.Fatalf("anthropic-api-key is %q, expected static-key", static.Shape())
	}

	grant, err := For("anthropic")
	if err != nil {
		t.Fatal(err)
	}
	if grant.Shape() != RefreshableGrant {
		t.Fatalf("anthropic is %q, expected refreshable-grant", grant.Shape())
	}

	// openai is a second static-key vendor, served by the same generic adapter — the registry line is
	// the whole of its integration, and it reports the static-key shape like any other.
	openai, err := For("openai")
	if err != nil {
		t.Fatal(err)
	}
	if openai.Shape() != StaticKey {
		t.Fatalf("openai is %q, expected static-key", openai.Shape())
	}
}

// The type assertion is what gates the carve-out: a static key is not a Refresher, so it can never
// reach the machinery that holds a token readably. A refreshable grant is one.
func TestOnlyARefreshableGrantIsARefresher(t *testing.T) {
	static, _ := For("anthropic-api-key")
	if _, ok := static.(Refresher); ok {
		t.Fatal("a static-key adapter is a Refresher, so the carve-out is not gated by shape")
	}
	grant, _ := For("anthropic")
	if _, ok := grant.(Refresher); !ok {
		t.Fatal("a refreshable-grant adapter is not a Refresher, so it cannot be refreshed")
	}
}

// With nothing plugged in, a refresh is refused in a way that names why — not answered with a
// silent no-op that would look like a refresh that changed nothing.
func TestARefreshWithNoRefresherPluggedInIsRefused(t *testing.T) {
	grant, _ := For("anthropic")
	r := grant.(Refresher)
	_, err := r.Refresh(context.Background(), RefreshInput{Licence: "personal"})
	if err == nil {
		t.Fatal("a refresh succeeded with no vendor refresher plugged in")
	}
	if !strings.Contains(err.Error(), "Phase C") {
		t.Fatalf("the refusal does not point at the missing plug-in: %v", err)
	}
}

type fakeVendor struct {
	result RefreshResult
	got    RefreshInput
}

func (f *fakeVendor) Refresh(_ context.Context, in RefreshInput) (RefreshResult, error) {
	f.got = in
	return f.result, nil
}

// A plugged-in refresher is dispatched to, and is handed the sealed refresh token (never a plaintext
// one) plus which node is the manager.
func TestAPluggedInRefresherIsDispatchedTo(t *testing.T) {
	fake := &fakeVendor{result: RefreshResult{AccessToken: "at-new"}}
	RegisterRefresher("anthropic", fake)
	defer RegisterRefresher("anthropic", nil)

	grant, _ := For("anthropic")
	r := grant.(Refresher)
	in := RefreshInput{
		Licence: "personal", Manager: "workstation",
		Sealed: "sealed-box", ManagerKey: "mk",
	}
	out, err := r.Refresh(context.Background(), in)
	if err != nil {
		t.Fatal(err)
	}
	if out.AccessToken != "at-new" {
		t.Fatalf("the dispatched result did not come back: %q", out.AccessToken)
	}
	if fake.got.Manager != "workstation" || fake.got.Sealed != "sealed-box" {
		t.Fatalf("the refresher was handed the wrong input: %+v", fake.got)
	}
}

// A vendor this build has no adapter for is refused, and the refusal lists what it does know so a
// typo and an unsupported vendor are told apart.
func TestAnUnknownVendorIsRefusedWithTheList(t *testing.T) {
	_, err := For("acme-models")
	if err == nil {
		t.Fatal("an unknown vendor returned an adapter")
	}
	if !strings.Contains(err.Error(), "anthropic") {
		t.Fatalf("the refusal does not list the known vendors: %v", err)
	}
}

// Both shapes deliver their stored blob unchanged: a static key has no vendor step, and a
// refreshable grant's holder row holds an access token with no refresh token to strip.
func TestBothShapesDeliverTheStoredBlobUnchanged(t *testing.T) {
	for _, vendor := range []string{"anthropic", "anthropic-api-key"} {
		a, _ := For(vendor)
		if got := a.Deliver("sealed-blob"); got != "sealed-blob" {
			t.Fatalf("%s changed the delivered blob to %q", vendor, got)
		}
	}
}