// Copyright 2014 The oauth2 Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package google_test

import (
	"fmt"
	"log"
	"net/http"
	"testing"

	"github.com/golang/oauth2"
	"github.com/golang/oauth2/google"
	"google.golang.org/appengine"
)

// Remove after Go 1.4.
// Related to https://codereview.appspot.com/107320046
func TestA(t *testing.T) {}

func Example_webServer() {
	// Your credentials should be obtained from the Google
	// Developer Console (https://console.developers.google.com).
	config, err := google.NewConfig(&oauth2.Options{
		ClientID:     "YOUR_CLIENT_ID",
		ClientSecret: "YOUR_CLIENT_SECRET",
		RedirectURL:  "YOUR_REDIRECT_URL",
		Scopes: []string{
			"https://www.googleapis.com/auth/bigquery",
			"https://www.googleapis.com/auth/blogger"},
	})
	if err != nil {
		log.Fatal(err)
	}

	// Redirect user to Google's consent page to ask for permission
	// for the scopes specified above.
	url := config.AuthCodeURL("state", "online", "auto")
	fmt.Printf("Visit the URL for the auth dialog: %v", url)

	// Handle the exchange code to initiate a transport
	t, err := config.NewTransportWithCode("exchange-code")
	if err != nil {
		log.Fatal(err)
	}
	client := http.Client{Transport: t}
	client.Get("...")
}

func Example_serviceAccountsJSON() {
	// Your credentials should be obtained from the Google
	// Developer Console (https://console.developers.google.com).
	// Navigate to your project, then see the "Credentials" page
	// under "APIs & Auth".
	// To create a service account client, click "Create new Client ID",
	// select "Service Account", and click "Create Client ID". A JSON
	// key file will then be downloaded to your computer.
	config, err := google.NewServiceAccountJSONConfig(
		"/path/to/your-project-key.json",
		"https://www.googleapis.com/auth/bigquery",
	)
	if err != nil {
		log.Fatal(err)
	}
	// Initiate an http.Client. The following GET request will be
	// authorized and authenticated on the behalf of
	// your service account.
	client := http.Client{Transport: config.NewTransport()}
	client.Get("...")

	// If you would like to impersonate a user, you can
	// create a transport with a subject. The following GET
	// request will be made on the behalf of user@example.com.
	client = http.Client{Transport: config.NewTransportWithUser("user@example.com")}
	client.Get("...")
}

func Example_serviceAccounts() {
	// Your credentials should be obtained from the Google
	// Developer Console (https://console.developers.google.com).
	config, err := google.NewServiceAccountConfig(&oauth2.JWTOptions{
		Email: "xxx@developer.gserviceaccount.com",
		// The contents of your RSA private key or your PEM file
		// that contains a private key.
		// If you have a p12 file instead, you
		// can use `openssl` to export the private key into a PEM file.
		//
		//    $ openssl pkcs12 -in key.p12 -out key.pem -nodes
		//
		// Supports only PEM containers without a passphrase.
		PrivateKey: []byte("PRIVATE KEY CONTENTS"),
		Scopes: []string{
			"https://www.googleapis.com/auth/bigquery",
		},
	})
	if err != nil {
		log.Fatal(err)
	}

	// Initiate an http.Client, the following GET request will be
	// authorized and authenticated on the behalf of
	// xxx@developer.gserviceaccount.com.
	client := http.Client{Transport: config.NewTransport()}
	client.Get("...")

	// If you would like to impersonate a user, you can
	// create a transport with a subject. The following GET
	// request will be made on the behalf of user@example.com.
	client = http.Client{Transport: config.NewTransportWithUser("user@example.com")}
	client.Get("...")
}

func Example_appEngine() {
	c := appengine.NewContext(nil)
	config := google.NewAppEngineConfig(c, "https://www.googleapis.com/auth/bigquery")
	// The following client will be authorized by the App Engine
	// app's service account for the provided scopes.
	client := http.Client{Transport: config.NewTransport()}
	client.Get("...")
}

func Example_computeEngine() {
	// If no other account is specified, "default" is used.
	config := google.NewComputeEngineConfig("")
	client := http.Client{Transport: config.NewTransport()}
	client.Get("...")
}