package shopify

import (
	"errors"
	"testing"
	"time"
)

func TestParseAccessTokenResponse(t *testing.T) {
	t.Parallel()
	parsed, err := parseAccessTokenResponse([]byte(`{"access_token":"tok_abc","scope":"read_products","expires_in":86399}`))
	if err != nil {
		t.Fatalf("parse: %v", err)
	}
	if parsed.AccessToken != "tok_abc" || parsed.Scope != "read_products" || parsed.ExpiresIn != 86399 {
		t.Fatalf("unexpected parse: %+v", parsed)
	}
}

func TestParseAccessTokenResponseEmpty(t *testing.T) {
	t.Parallel()
	_, err := parseAccessTokenResponse(nil)
	if !errors.Is(err, ErrTokenExchangeFailed) {
		t.Fatalf("want ErrTokenExchangeFailed, got %v", err)
	}
}

func TestExchangeClientCredentialsRequiresPair(t *testing.T) {
	t.Parallel()
	_, err := ExchangeClientCredentials(t.Context(), nil, "demo.myshopify.com", "id-only", "")
	if !errors.Is(err, ErrInvalidClientCredentials) {
		t.Fatalf("want ErrInvalidClientCredentials, got %v", err)
	}
}

func TestTokenNeedsRefresh(t *testing.T) {
	t.Parallel()
	now := time.Date(2026, 8, 9, 12, 0, 0, 0, time.UTC)
	if !tokenNeedsRefresh(nil, now) {
		t.Fatal("nil expiry should refresh")
	}
	soon := now.Add(30 * time.Second)
	if !tokenNeedsRefresh(&soon, now) {
		t.Fatal("within skew should refresh")
	}
	later := now.Add(time.Hour)
	if tokenNeedsRefresh(&later, now) {
		t.Fatal("fresh token should not refresh")
	}
}

func TestClientErrorTokenExchange(t *testing.T) {
	t.Parallel()
	msg, ok := ClientError(ErrTokenExchangeFailed)
	if !ok || msg == "" {
		t.Fatalf("ClientError should map token exchange: ok=%v msg=%q", ok, msg)
	}
}