package protocol

import (
	"context"
	"crypto/ecdsa"
	"testing"

	"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/requests"
	"github.com/status-im/status-go/protocol/tt"
	"github.com/status-im/status-go/waku"
)

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 waku service should be shared.
	shh    types.Waku
	logger *zap.Logger
}

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

	config := waku.DefaultConfig
	config.MinimumAcceptedPoW = 0
	shh := waku.New(&config, s.logger)
	s.shh = gethbridge.NewGethWakuWrapper(shh)
	s.Require().NoError(shh.Start())

	s.m = s.newMessenger(s.shh)
	s.privateKey = s.m.identity
	_, err := s.m.Start()
	s.Require().NoError(err)
}

func (s *MessengerContactUpdateSuite) TearDownTest() {
	s.Require().NoError(s.m.Shutdown())
}

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

	messenger, err := newMessengerWithKey(s.shh, privateKey, s.logger, nil)
	s.Require().NoError(err)
	return messenger
}

func (s *MessengerContactUpdateSuite) TestReceiveContactUpdate() {
	theirName := "ens-name.stateofus.eth"

	contactID := types.EncodeHex(crypto.FromECDSAPub(&s.m.identity.PublicKey))

	theirMessenger := s.newMessenger(s.shh)
	_, err := theirMessenger.Start()
	s.Require().NoError(err)

	// Set ENS name
	err = theirMessenger.settings.SaveSetting("preferred-name", theirName)
	s.Require().NoError(err)

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

	response, err := theirMessenger.AddContact(context.Background(), &requests.AddContact{ID: types.Hex2Bytes(contactID)})
	s.Require().NoError(err)
	s.Require().NotNil(response)

	s.Require().Len(response.Contacts, 1)
	contact := response.Contacts[0]
	// It should add the contact
	s.Require().True(contact.Added)

	// It should create a profile chat & a one to one chat
	s.Require().Len(response.Chats(), 2)
	chats := response.Chats()
	if chats[0].ChatType == ChatTypeOneToOne {
		s.Require().False(chats[0].Active)
	} else {
		s.Require().False(chats[1].Active)
	}

	// Wait for the message to reach its destination
	response, err = WaitOnMessengerResponse(
		s.m,
		func(r *MessengerResponse) bool { return len(r.Contacts) > 0 },
		"contact request not received",
	)
	s.Require().NoError(err)

	receivedContact := response.Contacts[0]
	s.Require().Equal(theirName, receivedContact.EnsName)
	s.Require().False(receivedContact.ENSVerified)
	s.Require().NotEmpty(receivedContact.LastUpdated)
	s.Require().True(receivedContact.HasAddedUs)

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

	// Wait for the message to reach its destination
	response, err = WaitOnMessengerResponse(
		s.m,
		func(r *MessengerResponse) bool {
			return len(r.Contacts) > 0 && response.Contacts[0].ID == theirContactID
		},
		"contact request not received",
	)

	s.Require().NoError(err)

	receivedContact = response.Contacts[0]
	s.Require().Equal(theirContactID, receivedContact.ID)
	s.Require().Equal(newEnsName, receivedContact.EnsName)
	s.Require().False(receivedContact.ENSVerified)
	s.Require().NotEmpty(receivedContact.LastUpdated)
	s.Require().NoError(theirMessenger.Shutdown())
}

func (s *MessengerContactUpdateSuite) TestAddContact() {
	contactID := types.EncodeHex(crypto.FromECDSAPub(&s.m.identity.PublicKey))

	theirMessenger := s.newMessenger(s.shh)
	_, err := theirMessenger.Start()
	s.Require().NoError(err)

	response, err := theirMessenger.AddContact(context.Background(), &requests.AddContact{ID: types.Hex2Bytes(contactID)})
	s.Require().NoError(err)
	s.Require().NotNil(response)

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

	// It adds the profile chat and the one to one chat
	s.Require().Len(response.Chats(), 2)

	// It should add the contact
	s.Require().True(contact.Added)

	// Wait for the message to reach its destination
	response, err = WaitOnMessengerResponse(
		s.m,
		func(r *MessengerResponse) bool { return len(r.Contacts) > 0 },
		"contact request not received",
	)
	s.Require().NoError(err)

	receivedContact := response.Contacts[0]
	s.Require().NotEmpty(receivedContact.LastUpdated)
}

func (s *MessengerContactUpdateSuite) TestAddContactWithENS() {
	contactID := types.EncodeHex(crypto.FromECDSAPub(&s.m.identity.PublicKey))
	ensName := "blah.stateofus.eth"

	theirMessenger := s.newMessenger(s.shh)
	_, err := theirMessenger.Start()
	s.Require().NoError(err)

	s.Require().NoError(theirMessenger.ENSVerified(contactID, ensName))

	response, err := theirMessenger.AddContact(context.Background(), &requests.AddContact{ID: types.Hex2Bytes(contactID)})
	s.Require().NoError(err)
	s.Require().NotNil(response)
	s.Require().Len(response.Contacts, 1)
	s.Require().Equal(ensName, response.Contacts[0].EnsName)
	s.Require().True(response.Contacts[0].ENSVerified)

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

	// It adds the profile chat and the one to one chat
	s.Require().Len(response.Chats(), 2)

	// It should add the contact
	s.Require().True(contact.Added)

	// Wait for the message to reach its destination
	response, err = WaitOnMessengerResponse(
		s.m,
		func(r *MessengerResponse) bool { return len(r.Contacts) > 0 },
		"contact request not received",
	)
	s.Require().NoError(err)

	receivedContact := response.Contacts[0]
	s.Require().NotEmpty(receivedContact.LastUpdated)
}

func (s *MessengerContactUpdateSuite) TestRejectContactRequest() {
	contactID := types.EncodeHex(crypto.FromECDSAPub(&s.m.identity.PublicKey))

	theirMessenger := s.newMessenger(s.shh)
	_, err := theirMessenger.Start()
	s.Require().NoError(err)

	response, err := theirMessenger.AddContact(context.Background(), &requests.AddContact{ID: types.Hex2Bytes(contactID)})
	s.Require().NoError(err)
	s.Require().NotNil(response)

	s.Require().Len(response.Contacts, 1)
	contact := response.Contacts[0]
	// It should add the contact
	s.Require().True(contact.Added)

	// Wait for the message to reach its destination
	response, err = WaitOnMessengerResponse(
		s.m,
		func(r *MessengerResponse) bool { return len(r.Contacts) > 0 },
		"contact request not received",
	)
	s.Require().NoError(err)

	// Make sure HasAddedUs is set
	receivedContact := response.Contacts[0]
	s.Require().True(receivedContact.HasAddedUs)

	response, err = s.m.RejectContactRequest(context.Background(), &requests.RejectContactRequest{ID: types.Hex2Bytes(contactID)})
	s.Require().NoError(err)
	s.Require().Len(response.Contacts, 1)
	s.Require().Equal(response.Contacts[0].ID, contactID)
	s.Require().False(response.Contacts[0].HasAddedUs)
}