package protocol

import (
	"context"
	"crypto/ecdsa"
	"errors"
	"io/ioutil"
	"os"
	"testing"

	"github.com/google/uuid"
	"github.com/stretchr/testify/suite"
	"go.uber.org/zap"

	gethbridge "github.com/status-im/status-go/eth-node/bridge/geth"
	"github.com/status-im/status-go/eth-node/crypto"
	"github.com/status-im/status-go/eth-node/types"
	"github.com/status-im/status-go/protocol/tt"
	"github.com/status-im/status-go/whisper/v6"
)

func TestMessengerContactUpdateSuite(t *testing.T) {
	suite.Run(t, new(MessengerContactUpdateSuite))
}

type MessengerContactUpdateSuite struct {
	suite.Suite
	m          *Messenger        // main instance of Messenger
	privateKey *ecdsa.PrivateKey // private key for the main instance of Messenger
	// If one wants to send messages between different instances of Messenger,
	// a single Whisper service should be shared.
	shh      types.Whisper
	tmpFiles []*os.File // files to clean up
	logger   *zap.Logger
}

func (s *MessengerContactUpdateSuite) SetupTest() {
	s.logger = tt.MustCreateTestLogger()

	config := whisper.DefaultConfig
	config.MinimumAcceptedPOW = 0
	shh := whisper.New(&config)
	s.shh = gethbridge.NewGethWhisperWrapper(shh)
	s.Require().NoError(shh.Start(nil))

	s.m = s.newMessenger(s.shh)
	s.privateKey = s.m.identity
}

func (s *MessengerContactUpdateSuite) newMessengerWithKey(shh types.Whisper, privateKey *ecdsa.PrivateKey) *Messenger {
	tmpFile, err := ioutil.TempFile("", "")
	s.Require().NoError(err)

	options := []Option{
		WithCustomLogger(s.logger),
		WithMessagesPersistenceEnabled(),
		WithDatabaseConfig(tmpFile.Name(), "some-key"),
		WithDatasync(),
	}
	m, err := NewMessenger(
		privateKey,
		&testNode{shh: shh},
		uuid.New().String(),
		options...,
	)
	s.Require().NoError(err)

	err = m.Init()
	s.Require().NoError(err)

	s.tmpFiles = append(s.tmpFiles, tmpFile)

	return m
}

func (s *MessengerContactUpdateSuite) newMessenger(shh types.Whisper) *Messenger {
	privateKey, err := crypto.GenerateKey()
	s.Require().NoError(err)

	return s.newMessengerWithKey(s.shh, privateKey)
}

func (s *MessengerContactUpdateSuite) TestReceiveContactUpdate() {
	theirName := "ens-name.stateofus.eth"
	theirPicture := "their-picture"
	contactID := types.EncodeHex(crypto.FromECDSAPub(&s.m.identity.PublicKey))

	theirMessenger := s.newMessenger(s.shh)
	theirContactID := types.EncodeHex(crypto.FromECDSAPub(&theirMessenger.identity.PublicKey))

	response, err := theirMessenger.SendContactUpdate(context.Background(), contactID, theirName, theirPicture)
	s.Require().NoError(err)
	s.Require().NotNil(response)

	s.Require().Len(response.Contacts, 1)
	contact := response.Contacts[0]
	s.Require().True(contact.IsAdded())

	s.Require().Len(response.Chats, 1)
	chat := response.Chats[0]
	s.Require().False(chat.Active, "It does not create an active chat")

	// Wait for the message to reach its destination
	err = tt.RetryWithBackOff(func() error {
		var err error
		response, err = s.m.RetrieveAll()
		if err == nil && len(response.Contacts) == 0 {
			err = errors.New("contact request not received")
		}
		return err
	})
	s.Require().NoError(err)

	receivedContact := response.Contacts[0]
	s.Require().Equal(theirName, receivedContact.Name)
	s.Require().Equal(theirPicture, receivedContact.Photo)
	s.Require().False(receivedContact.ENSVerified)
	s.Require().True(receivedContact.HasBeenAdded())
	s.Require().NotEmpty(receivedContact.LastUpdated)

	newName := "new-name"
	newPicture := "new-picture"
	err = theirMessenger.SendContactUpdates(context.Background(), newName, newPicture)
	s.Require().NoError(err)

	// Wait for the message to reach its destination
	err = tt.RetryWithBackOff(func() error {
		var err error
		response, err = s.m.RetrieveAll()
		if err == nil && len(response.Contacts) == 0 || (len(response.Contacts) == 1 && response.Contacts[0].ID != theirContactID) {
			err = errors.New("contact request not received")
		}
		return err
	})
	s.Require().NoError(err)

	receivedContact = response.Contacts[0]
	s.Require().Equal(theirContactID, receivedContact.ID)
	s.Require().Equal(newName, receivedContact.Name)
	s.Require().Equal(newPicture, receivedContact.Photo)
	s.Require().False(receivedContact.ENSVerified)
	s.Require().True(receivedContact.HasBeenAdded())
	s.Require().NotEmpty(receivedContact.LastUpdated)
}