// Retrieve generates a new set of temporary credentials using STS.
func (p *AssumeRoleProvider) Retrieve() (credentials.Value, error) {

	// Apply defaults where parameters are not set.
	if p.RoleSessionName == "" {
		// Try to work out a role name that will hopefully end up unique.
		p.RoleSessionName = fmt.Sprintf("%d", time.Now().UTC().UnixNano())
	}
	if p.Duration == 0 {
		// Expire as often as AWS permits.
		p.Duration = DefaultDuration
	}

	roleOutput, err := p.Client.AssumeRole(&sts.AssumeRoleInput{
		DurationSeconds: aws.Int64(int64(p.Duration / time.Second)),
		RoleArn:         aws.String(p.RoleARN),
		RoleSessionName: aws.String(p.RoleSessionName),
		ExternalId:      p.ExternalID,
	})

	if err != nil {
		return credentials.Value{}, err
	}

	// We will proactively generate new credentials before they expire.
	p.SetExpiration(*roleOutput.Credentials.Expiration, p.ExpiryWindow)

	return credentials.Value{
		AccessKeyID:     *roleOutput.Credentials.AccessKeyId,
		SecretAccessKey: *roleOutput.Credentials.SecretAccessKey,
		SessionToken:    *roleOutput.Credentials.SessionToken,
	}, nil
}

func TestPresignHandler(t *testing.T) {
	svc := s3.New(unit.Session)
	req, _ := svc.PutObjectRequest(&s3.PutObjectInput{
		Bucket:             aws.String("bucket"),
		Key:                aws.String("key"),
		ContentDisposition: aws.String("a+b c$d"),
		ACL:                aws.String("public-read"),
	})
	req.Time = time.Unix(0, 0)
	urlstr, err := req.Presign(5 * time.Minute)

	assert.NoError(t, err)

	expectedDate := "19700101T000000Z"
	expectedHeaders := "host;x-amz-acl"
	expectedSig := "7edcb4e3a1bf12f4989018d75acbe3a7f03df24bd6f3112602d59fc551f0e4e2"
	expectedCred := "AKID/19700101/mock-region/s3/aws4_request"

	u, _ := url.Parse(urlstr)
	urlQ := u.Query()
	assert.Equal(t, expectedSig, urlQ.Get("X-Amz-Signature"))
	assert.Equal(t, expectedCred, urlQ.Get("X-Amz-Credential"))
	assert.Equal(t, expectedHeaders, urlQ.Get("X-Amz-SignedHeaders"))
	assert.Equal(t, expectedDate, urlQ.Get("X-Amz-Date"))
	assert.Equal(t, "300", urlQ.Get("X-Amz-Expires"))

	assert.NotContains(t, urlstr, "+") // + encoded as %20
}

func TestUnsignedRequest_AssumeRoleWithWebIdentity(t *testing.T) {
	req, _ := svc.AssumeRoleWithWebIdentityRequest(&sts.AssumeRoleWithWebIdentityInput{
		RoleArn:          aws.String("ARN01234567890123456789"),
		RoleSessionName:  aws.String("SESSION"),
		WebIdentityToken: aws.String("TOKEN"),
	})

	err := req.Sign()
	assert.NoError(t, err)
	assert.Equal(t, "", req.HTTPRequest.Header.Get("Authorization"))
}

func TestUnsignedRequest_AssumeRoleWithSAML(t *testing.T) {
	req, _ := svc.AssumeRoleWithSAMLRequest(&sts.AssumeRoleWithSAMLInput{
		PrincipalArn:  aws.String("ARN01234567890123456789"),
		RoleArn:       aws.String("ARN01234567890123456789"),
		SAMLAssertion: aws.String("ASSERT"),
	})

	err := req.Sign()
	assert.NoError(t, err)
	assert.Equal(t, "", req.HTTPRequest.Header.Get("Authorization"))
}

func (s *stubSTS) AssumeRole(input *sts.AssumeRoleInput) (*sts.AssumeRoleOutput, error) {
	expiry := time.Now().Add(60 * time.Minute)
	return &sts.AssumeRoleOutput{
		Credentials: &sts.Credentials{
			// Just reflect the role arn to the provider.
			AccessKeyId:     input.RoleArn,
			SecretAccessKey: aws.String("assumedSecretAccessKey"),
			SessionToken:    aws.String("assumedSessionToken"),
			Expiration:      &expiry,
		},
	}, nil
}

// Use DynamoDB methods for simplicity
func TestPaginationEachPage(t *testing.T) {
	db := dynamodb.New(unit.Session)
	tokens, pages, numPages, gotToEnd := []string{}, []string{}, 0, false

	reqNum := 0
	resps := []*dynamodb.ListTablesOutput{
		{TableNames: []*string{aws.String("Table1"), aws.String("Table2")}, LastEvaluatedTableName: aws.String("Table2")},
		{TableNames: []*string{aws.String("Table3"), aws.String("Table4")}, LastEvaluatedTableName: aws.String("Table4")},
		{TableNames: []*string{aws.String("Table5")}},
	}

	db.Handlers.Send.Clear() // mock sending
	db.Handlers.Unmarshal.Clear()
	db.Handlers.UnmarshalMeta.Clear()
	db.Handlers.ValidateResponse.Clear()
	db.Handlers.Build.PushBack(func(r *request.Request) {
		in := r.Params.(*dynamodb.ListTablesInput)
		if in == nil {
			tokens = append(tokens, "")
		} else if in.ExclusiveStartTableName != nil {
			tokens = append(tokens, *in.ExclusiveStartTableName)
		}
	})
	db.Handlers.Unmarshal.PushBack(func(r *request.Request) {
		r.Data = resps[reqNum]
		reqNum++
	})

	params := &dynamodb.ListTablesInput{Limit: aws.Int64(2)}
	req, _ := db.ListTablesRequest(params)
	err := req.EachPage(func(p interface{}, last bool) bool {
		numPages++
		for _, t := range p.(*dynamodb.ListTablesOutput).TableNames {
			pages = append(pages, *t)
		}
		if last {
			if gotToEnd {
				assert.Fail(t, "last=true happened twice")
			}
			gotToEnd = true
		}

		return true
	})

	assert.Equal(t, []string{"Table2", "Table4"}, tokens)
	assert.Equal(t, []string{"Table1", "Table2", "Table3", "Table4", "Table5"}, pages)
	assert.Equal(t, 3, numPages)
	assert.True(t, gotToEnd)
	assert.Nil(t, err)
}

func TestNoErrors(t *testing.T) {
	input := &StructShape{
		RequiredList: []*ConditionalStructShape{},
		RequiredMap: map[string]*ConditionalStructShape{
			"key1": {Name: aws.String("Name")},
			"key2": {Name: aws.String("Name")},
		},
		RequiredBool:   aws.Bool(true),
		OptionalStruct: &ConditionalStructShape{Name: aws.String("Name")},
	}

	req := testSvc.NewRequest(&request.Operation{}, input, nil)
	corehandlers.ValidateParametersHandler.Fn(req)
	require.NoError(t, req.Error)
}

func TestEC2RoleProviderExpiryWindowIsExpired(t *testing.T) {
	server := initTestServer("2014-12-16T01:51:37Z", false)
	defer server.Close()

	p := &ec2rolecreds.EC2RoleProvider{
		Client:       ec2metadata.New(session.New(), &aws.Config{Endpoint: aws.String(server.URL + "/latest")}),
		ExpiryWindow: time.Hour * 1,
	}
	p.CurrentTime = func() time.Time {
		return time.Date(2014, 12, 15, 0, 51, 37, 0, time.UTC)
	}

	assert.True(t, p.IsExpired(), "Expect creds to be expired before retrieve.")

	_, err := p.Retrieve()
	assert.Nil(t, err, "Expect no error, %v", err)

	assert.False(t, p.IsExpired(), "Expect creds to not be expired after retrieve.")

	p.CurrentTime = func() time.Time {
		return time.Date(2014, 12, 16, 0, 55, 37, 0, time.UTC)
	}

	assert.True(t, p.IsExpired(), "Expect creds to be expired.")
}

func TestNewDefaultSession(t *testing.T) {
	s := session.New(&aws.Config{Region: aws.String("region")})

	assert.Equal(t, "region", *s.Config.Region)
	assert.Equal(t, http.DefaultClient, s.Config.HTTPClient)
	assert.NotNil(t, s.Config.Logger)
	assert.Equal(t, aws.LogOff, *s.Config.LogLevel)
}

// Use S3 for simplicity
func TestPaginationTruncation(t *testing.T) {
	client := s3.New(unit.Session)

	reqNum := 0
	resps := []*s3.ListObjectsOutput{
		{IsTruncated: aws.Bool(true), Contents: []*s3.Object{{Key: aws.String("Key1")}}},
		{IsTruncated: aws.Bool(true), Contents: []*s3.Object{{Key: aws.String("Key2")}}},
		{IsTruncated: aws.Bool(false), Contents: []*s3.Object{{Key: aws.String("Key3")}}},
		{IsTruncated: aws.Bool(true), Contents: []*s3.Object{{Key: aws.String("Key4")}}},
	}

	client.Handlers.Send.Clear() // mock sending
	client.Handlers.Unmarshal.Clear()
	client.Handlers.UnmarshalMeta.Clear()
	client.Handlers.ValidateResponse.Clear()
	client.Handlers.Unmarshal.PushBack(func(r *request.Request) {
		r.Data = resps[reqNum]
		reqNum++
	})

	params := &s3.ListObjectsInput{Bucket: aws.String("bucket")}

	results := []string{}
	err := client.ListObjectsPages(params, func(p *s3.ListObjectsOutput, last bool) bool {
		results = append(results, *p.Contents[0].Key)
		return true
	})

	assert.Equal(t, []string{"Key1", "Key2", "Key3"}, results)
	assert.Nil(t, err)

	// Try again without truncation token at all
	reqNum = 0
	resps[1].IsTruncated = nil
	resps[2].IsTruncated = aws.Bool(true)
	results = []string{}
	err = client.ListObjectsPages(params, func(p *s3.ListObjectsOutput, last bool) bool {
		results = append(results, *p.Contents[0].Key)
		return true
	})

	assert.Equal(t, []string{"Key1", "Key2"}, results)
	assert.Nil(t, err)
}

func TestDeepEqual(t *testing.T) {
	cases := []struct {
		a, b  interface{}
		equal bool
	}{
		{"a", "a", true},
		{"a", "b", false},
		{"a", aws.String(""), false},
		{"a", nil, false},
		{"a", aws.String("a"), true},
		{(*bool)(nil), (*bool)(nil), true},
		{(*bool)(nil), (*string)(nil), false},
		{nil, nil, true},
	}

	for i, c := range cases {
		assert.Equal(t, c.equal, awsutil.DeepEqual(c.a, c.b), "%d, a:%v b:%v, %t", i, c.a, c.b, c.equal)
	}
}

func ExampleSTS_GetSessionToken() {
	svc := sts.New(session.New())

	params := &sts.GetSessionTokenInput{
		DurationSeconds: aws.Int64(1),
		SerialNumber:    aws.String("serialNumberType"),
		TokenCode:       aws.String("tokenCodeType"),
	}
	resp, err := svc.GetSessionToken(params)

	if err != nil {
		// Print the error, cast err to awserr.Error to get the Code and
		// Message from an error.
		fmt.Println(err.Error())
		return
	}

	// Pretty-print the response data.
	fmt.Println(resp)
}

func ExampleSTS_GetFederationToken() {
	svc := sts.New(session.New())

	params := &sts.GetFederationTokenInput{
		Name:            aws.String("userNameType"), // Required
		DurationSeconds: aws.Int64(1),
		Policy:          aws.String("sessionPolicyDocumentType"),
	}
	resp, err := svc.GetFederationToken(params)

	if err != nil {
		// Print the error, cast err to awserr.Error to get the Code and
		// Message from an error.
		fmt.Println(err.Error())
		return
	}

	// Pretty-print the response data.
	fmt.Println(resp)
}

func TestRequestUserAgent(t *testing.T) {
	s := awstesting.NewClient(&aws.Config{Region: aws.String("us-east-1")})
	//	s.Handlers.Validate.Clear()

	req := s.NewRequest(&request.Operation{Name: "Operation"}, nil, &testData{})
	req.HTTPRequest.Header.Set("User-Agent", "foo/bar")
	assert.NoError(t, req.Build())

	expectUA := fmt.Sprintf("foo/bar %s/%s (%s; %s; %s)",
		aws.SDKName, aws.SDKVersion, runtime.Version(), runtime.GOOS, runtime.GOARCH)
	assert.Equal(t, expectUA, req.HTTPRequest.Header.Get("User-Agent"))
}

// Use DynamoDB methods for simplicity
func TestPaginationEarlyExit(t *testing.T) {
	db := dynamodb.New(unit.Session)
	numPages, gotToEnd := 0, false

	reqNum := 0
	resps := []*dynamodb.ListTablesOutput{
		{TableNames: []*string{aws.String("Table1"), aws.String("Table2")}, LastEvaluatedTableName: aws.String("Table2")},
		{TableNames: []*string{aws.String("Table3"), aws.String("Table4")}, LastEvaluatedTableName: aws.String("Table4")},
		{TableNames: []*string{aws.String("Table5")}},
	}

	db.Handlers.Send.Clear() // mock sending
	db.Handlers.Unmarshal.Clear()
	db.Handlers.UnmarshalMeta.Clear()
	db.Handlers.ValidateResponse.Clear()
	db.Handlers.Unmarshal.PushBack(func(r *request.Request) {
		r.Data = resps[reqNum]
		reqNum++
	})

	params := &dynamodb.ListTablesInput{Limit: aws.Int64(2)}
	err := db.ListTablesPages(params, func(p *dynamodb.ListTablesOutput, last bool) bool {
		numPages++
		if numPages == 2 {
			return false
		}
		if last {
			if gotToEnd {
				assert.Fail(t, "last=true happened twice")
			}
			gotToEnd = true
		}
		return true
	})

	assert.Equal(t, 2, numPages)
	assert.False(t, gotToEnd)
	assert.Nil(t, err)
}

func ExampleSTS_AssumeRoleWithSAML() {
	svc := sts.New(session.New())

	params := &sts.AssumeRoleWithSAMLInput{
		PrincipalArn:    aws.String("arnType"),           // Required
		RoleArn:         aws.String("arnType"),           // Required
		SAMLAssertion:   aws.String("SAMLAssertionType"), // Required
		DurationSeconds: aws.Int64(1),
		Policy:          aws.String("sessionPolicyDocumentType"),
	}
	resp, err := svc.AssumeRoleWithSAML(params)

	if err != nil {
		// Print the error, cast err to awserr.Error to get the Code and
		// Message from an error.
		fmt.Println(err.Error())
		return
	}

	// Pretty-print the response data.
	fmt.Println(resp)
}

func ExampleSTS_AssumeRoleWithWebIdentity() {
	svc := sts.New(session.New())

	params := &sts.AssumeRoleWithWebIdentityInput{
		RoleArn:          aws.String("arnType"),             // Required
		RoleSessionName:  aws.String("roleSessionNameType"), // Required
		WebIdentityToken: aws.String("clientTokenType"),     // Required
		DurationSeconds:  aws.Int64(1),
		Policy:           aws.String("sessionPolicyDocumentType"),
		ProviderId:       aws.String("urlType"),
	}
	resp, err := svc.AssumeRoleWithWebIdentity(params)

	if err != nil {
		// Print the error, cast err to awserr.Error to get the Code and
		// Message from an error.
		fmt.Println(err.Error())
		return
	}

	// Pretty-print the response data.
	fmt.Println(resp)
}

func TestEC2RoleProvider(t *testing.T) {
	server := initTestServer("2014-12-16T01:51:37Z", false)
	defer server.Close()

	p := &ec2rolecreds.EC2RoleProvider{
		Client: ec2metadata.New(session.New(), &aws.Config{Endpoint: aws.String(server.URL + "/latest")}),
	}

	creds, err := p.Retrieve()
	assert.Nil(t, err, "Expect no error, %v", err)

	assert.Equal(t, "accessKey", creds.AccessKeyID, "Expect access key ID to match")
	assert.Equal(t, "secret", creds.SecretAccessKey, "Expect secret access key to match")
	assert.Equal(t, "token", creds.SessionToken, "Expect session token to match")
}

func TestNestedMissingRequiredParameters(t *testing.T) {
	input := &StructShape{
		RequiredList: []*ConditionalStructShape{{}},
		RequiredMap: map[string]*ConditionalStructShape{
			"key1": {Name: aws.String("Name")},
			"key2": {},
		},
		RequiredBool:   aws.Bool(true),
		OptionalStruct: &ConditionalStructShape{},
	}

	req := testSvc.NewRequest(&request.Operation{}, input, nil)
	corehandlers.ValidateParametersHandler.Fn(req)

	require.Error(t, req.Error)
	assert.Equal(t, "InvalidParameter", req.Error.(awserr.Error).Code())
	assert.Equal(t, "3 validation errors:\n- missing required parameter: RequiredList[0].Name\n- missing required parameter: RequiredMap[\"key2\"].Name\n- missing required parameter: OptionalStruct.Name", req.Error.(awserr.Error).Message())
}

func ExampleSTS_DecodeAuthorizationMessage() {
	svc := sts.New(session.New())

	params := &sts.DecodeAuthorizationMessageInput{
		EncodedMessage: aws.String("encodedMessageType"), // Required
	}
	resp, err := svc.DecodeAuthorizationMessage(params)

	if err != nil {
		// Print the error, cast err to awserr.Error to get the Code and
		// Message from an error.
		fmt.Println(err.Error())
		return
	}

	// Pretty-print the response data.
	fmt.Println(resp)
}