package oauth_test

import (
	"context"
	"testing"

	"github.com/sirupsen/logrus"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/mock"
	"golang.org/x/oauth2"
	"penahub.gitlab.yandexcloud.net/pena-services/pena-social-auth/internal/errors"
	"penahub.gitlab.yandexcloud.net/pena-services/pena-social-auth/internal/service/oauth"
	"penahub.gitlab.yandexcloud.net/pena-services/pena-social-auth/internal/service/oauth/mocks"
)

type SocialUserInformation struct {
	ID string
}

var (
	code = "code"

	socialUserInformation = SocialUserInformation{
		ID: "userid1",
	}

	oauthTokens = oauth2.Token{
		AccessToken:  "access-token-auth",
		RefreshToken: "refresh-token-auth",
	}
)

func TestGetUserInformationByCode(t *testing.T) {
	t.Run("Успешное получение информации о пользователе oauth через код", func(t *testing.T) {
		serviceClient := mocks.NewServiceClient[SocialUserInformation](t)
		oauthClient := mocks.NewOauthClient(t)
		oauthService := oauth.New(&oauth.Deps[SocialUserInformation]{
			Logger:        logrus.New(),
			ServiceClient: serviceClient,
			OAuthClient:   oauthClient,
		})

		oauthCodeExchangeCall := oauthClient.EXPECT().
			Exchange(mock.Anything, code).
			Return(&oauthTokens, nil).
			Once()

		serviceClient.EXPECT().
			GetUserInformation(mock.Anything, oauthTokens.AccessToken).
			Return(&socialUserInformation, nil).
			NotBefore(oauthCodeExchangeCall).
			Once()

		information, err := oauthService.GetUserInformationByCode(context.Background(), code)

		assert.NoError(t, err)
		assert.Equal(t, &socialUserInformation, information)
	})

	t.Run("Ошибка при запросе за информацией о пользователе oauth системы", func(t *testing.T) {
		serviceClient := mocks.NewServiceClient[SocialUserInformation](t)
		oauthClient := mocks.NewOauthClient(t)
		oauthService := oauth.New(&oauth.Deps[SocialUserInformation]{
			Logger:        logrus.New(),
			ServiceClient: serviceClient,
			OAuthClient:   oauthClient,
		})

		oauthCodeExchangeCall := oauthClient.EXPECT().
			Exchange(mock.Anything, code).
			Return(&oauthTokens, nil).
			Once()

		serviceClient.EXPECT().
			GetUserInformation(mock.Anything, oauthTokens.AccessToken).
			Return(nil, errors.ErrEmptyArgs).
			NotBefore(oauthCodeExchangeCall).
			Once()

		information, err := oauthService.GetUserInformationByCode(context.Background(), code)

		assert.Error(t, err)
		assert.EqualError(t, err, errors.ErrEmptyArgs.Error())
		assert.Nil(t, information)
	})

	t.Run("Ошибка при обмене ключа на токены при получении информации об oauth пользователе", func(t *testing.T) {
		serviceClient := mocks.NewServiceClient[SocialUserInformation](t)
		oauthClient := mocks.NewOauthClient(t)
		oauthService := oauth.New(&oauth.Deps[SocialUserInformation]{
			Logger:        logrus.New(),
			ServiceClient: serviceClient,
			OAuthClient:   oauthClient,
		})

		oauthClient.EXPECT().
			Exchange(mock.Anything, code).
			Return(nil, errors.ErrEmptyArgs).
			Once()

		serviceClient.AssertNotCalled(t, "GetUserInformation")

		information, err := oauthService.GetUserInformationByCode(context.Background(), code)

		assert.Error(t, err)
		assert.EqualError(t, err, errors.ErrEmptyArgs.Error())
		assert.Nil(t, information)
	})
}

func TestGenerateURL(t *testing.T) {
	generatedLink := "https://link"
	accessToken := "access-token"

	t.Run("Успешная генерация ссылки авторизации", func(t *testing.T) {
		oauthClient := mocks.NewOauthClient(t)
		oauthService := oauth.New(&oauth.Deps[any]{
			OAuthClient: oauthClient,
		})

		oauthClient.EXPECT().AuthCodeURL(oauthService.GetState(), oauth2.AccessTypeOffline).Return(generatedLink).Once()

		assert.Equal(t, generatedLink, oauthService.GenerateAuthURL())
	})

	t.Run("Успешная генерация ссылки привязки аккаунта", func(t *testing.T) {
		oauthClient := mocks.NewOauthClient(t)
		oauthService := oauth.New(&oauth.Deps[any]{
			OAuthClient: oauthClient,
		})

		oauthClient.EXPECT().
			AuthCodeURL(
				oauthService.GetState(),
				oauth2.AccessTypeOffline,
				oauth2.SetAuthURLParam("accessToken", accessToken),
			).
			Return(generatedLink).
			Once()

		assert.Equal(t, generatedLink, oauthService.GenerateLinkURL(accessToken))
	})
}

func TestGetState(t *testing.T) {
	t.Run("Успешное получение state", func(t *testing.T) {
		oauthService := oauth.New(&oauth.Deps[any]{})

		assert.NotEmpty(t, oauthService.GetState())
		assert.NotNil(t, oauthService.GetState())
		assert.NotZero(t, oauthService.GetState())
	})
}

func TestValidateState(t *testing.T) {
	t.Run("Невалидный state", func(t *testing.T) {
		oauthService := oauth.New(&oauth.Deps[any]{})

		assert.Equal(t, false, oauthService.ValidateState(""))
	})

	t.Run("Валидный state", func(t *testing.T) {
		oauthService := oauth.New(&oauth.Deps[any]{})

		assert.Equal(t, true, oauthService.ValidateState(oauthService.GetState()))
	})
}