package protocol

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

	"github.com/google/uuid"
	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/encryption/multidevice"
	"github.com/status-im/status-go/protocol/tt"
	"github.com/status-im/status-go/whisper/v6"
	"github.com/stretchr/testify/suite"
	"go.uber.org/zap"
)

func TestMessengerInstallationSuite(t *testing.T) {
	suite.Run(t, new(MessengerInstallationSuite))
}

type MessengerInstallationSuite 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
	installationID string
}

func (s *MessengerInstallationSuite) 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 *MessengerInstallationSuite) 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(),
	}
	installationID := uuid.New().String()
	m, err := NewMessenger(
		privateKey,
		&testNode{shh: shh},
		installationID,
		options...,
	)
	s.Require().NoError(err)

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

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

	return m
}

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

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

func (s *MessengerInstallationSuite) TestReceiveInstallation() {
	theirMessenger := s.newMessengerWithKey(s.shh, s.privateKey)

	err := theirMessenger.SetInstallationMetadata(theirMessenger.installationID, &multidevice.InstallationMetadata{
		Name:       "their-name",
		DeviceType: "their-device-type",
	})
	s.Require().NoError(err)
	response, err := theirMessenger.SendPairInstallation(context.Background())
	s.Require().NoError(err)
	s.Require().NotNil(response)
	s.Require().Len(response.Chats, 1)
	s.Require().False(response.Chats[0].Active)

	// 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.Installations) == 0 {
			err = errors.New("installation not received")
		}
		return err
	})
	s.Require().NoError(err)
	actualInstallation := response.Installations[0]
	s.Require().Equal(theirMessenger.installationID, actualInstallation.ID)
	s.Require().NotNil(actualInstallation.InstallationMetadata)
	s.Require().Equal("their-name", actualInstallation.InstallationMetadata.Name)
	s.Require().Equal("their-device-type", actualInstallation.InstallationMetadata.DeviceType)

	err = s.m.EnableInstallation(theirMessenger.installationID)
	s.Require().NoError(err)

	contactKey, err := crypto.GenerateKey()
	s.Require().NoError(err)

	contact, err := buildContact(&contactKey.PublicKey)
	s.Require().NoError(err)
	contact.SystemTags = append(contact.SystemTags, contactAdded)
	err = s.m.SaveContact(contact)
	s.Require().NoError(err)

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

	actualContact := response.Contacts[0]
	s.Require().Equal(contact.ID, actualContact.ID)
	s.Require().True(actualContact.IsAdded())
}

func (s *MessengerInstallationSuite) TestReceiveSyncInstallation() {
}