// Copyright 2017 Google LLC.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package option

import (
	"testing"

	"github.com/google/go-cmp/cmp"
	"github.com/google/go-cmp/cmp/cmpopts"
	"golang.org/x/oauth2/google"
	"google.golang.org/api/internal"
	"google.golang.org/grpc"
)

// Check that the slice passed into WithScopes is copied.
func TestCopyScopes(t *testing.T) {
	o := &internal.DialSettings{}

	scopes := []string{"a", "b"}
	WithScopes(scopes...).Apply(o)

	// Modify after using.
	scopes[1] = "c"

	if o.Scopes[0] != "a" || o.Scopes[1] != "b" {
		t.Errorf("want ['a', 'b'], got %+v", o.Scopes)
	}
}

func TestApply(t *testing.T) {
	conn := &grpc.ClientConn{}
	opts := []ClientOption{
		WithEndpoint("https://example.com:443"),
		WithScopes("a"), // the next WithScopes should overwrite this one
		WithScopes("https://example.com/auth/helloworld", "https://example.com/auth/otherthing"),
		WithGRPCConn(conn),
		WithUserAgent("ua"),
		WithCredentialsFile("service-account.json"),
		WithCredentialsJSON([]byte(`{some: "json"}`)),
		WithCredentials(&google.DefaultCredentials{ProjectID: "p"}),
		WithAPIKey("api-key"),
		WithAudiences("https://example.com/"),
		WithQuotaProject("user-project"),
		WithRequestReason("Request Reason"),
		WithTelemetryDisabled(),
	}
	var got internal.DialSettings
	for _, opt := range opts {
		opt.Apply(&got)
	}
	want := internal.DialSettings{
		Scopes:            []string{"https://example.com/auth/helloworld", "https://example.com/auth/otherthing"},
		UserAgent:         "ua",
		Endpoint:          "https://example.com:443",
		GRPCConn:          conn,
		Credentials:       &google.DefaultCredentials{ProjectID: "p"},
		CredentialsFile:   "service-account.json",
		CredentialsJSON:   []byte(`{some: "json"}`),
		APIKey:            "api-key",
		Audiences:         []string{"https://example.com/"},
		QuotaProject:      "user-project",
		RequestReason:     "Request Reason",
		TelemetryDisabled: true,
	}
	if !cmp.Equal(got, want, cmpopts.IgnoreUnexported(grpc.ClientConn{})) {
		t.Errorf(cmp.Diff(got, want, cmpopts.IgnoreUnexported(grpc.ClientConn{})))
	}
}