// Copyright 2022 The Sigstore Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package oauthflow

import (
	"bytes"
	"errors"
	"os"
	"testing"
)

func TestInteractiveFlow_IO(t *testing.T) {
	t.Run("default", func(t *testing.T) {
		f := &InteractiveIDTokenGetter{}
		if f.GetInput() != os.Stdin {
			t.Error("expected stdin")
		}
		if f.GetOutput() != os.Stderr {
			t.Error("expected stderr")
		}
	})

	t.Run("buffer", func(t *testing.T) {
		b := new(bytes.Buffer)
		f := &InteractiveIDTokenGetter{
			Input:  b,
			Output: b,
		}
		if f.GetInput() != b {
			t.Error("expected buffer")
		}
		if f.GetOutput() != b {
			t.Error("expected buffer")
		}
	})
}

func TestOpenURL(t *testing.T) {
	t.Run("custom opener", func(t *testing.T) {
		want := errors.New("custom opener called")
		var gotURL string
		f := &InteractiveIDTokenGetter{
			BrowserOpener: func(url string) error {
				gotURL = url
				return want
			},
		}
		if err := f.openURL("https://example.com/login"); !errors.Is(err, want) {
			t.Fatalf("expected custom opener error, got: %v", err)
		}
		if gotURL != "https://example.com/login" {
			t.Errorf("custom opener got url %q, want %q", gotURL, "https://example.com/login")
		}
	})

	t.Run("default opener", func(t *testing.T) {
		// With no BrowserOpener configured, openURL falls back to the package
		// default. Stub it so we don't actually launch a browser.
		var gotURL string
		old := browserOpener
		browserOpener = func(url string) error {
			gotURL = url
			return nil
		}
		defer func() { browserOpener = old }()

		f := &InteractiveIDTokenGetter{}
		if err := f.openURL("https://example.com/default"); err != nil {
			t.Fatalf("unexpected error: %v", err)
		}
		if gotURL != "https://example.com/default" {
			t.Errorf("default opener got url %q, want %q", gotURL, "https://example.com/default")
		}
	})
}
