package protocol

import (
	"context"
	"crypto/ecdsa"
	"fmt"
	"strings"
	"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/common"
	"github.com/status-im/status-go/protocol/communities"
	"github.com/status-im/status-go/protocol/protobuf"
	"github.com/status-im/status-go/protocol/requests"
	"github.com/status-im/status-go/protocol/tt"
	"github.com/status-im/status-go/protocol/urls"
	"github.com/status-im/status-go/waku"
)

func TestMessengerShareUrlsSuite(t *testing.T) {
	suite.Run(t, new(MessengerShareUrlsSuite))
}

type MessengerShareUrlsSuite 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 *MessengerShareUrlsSuite) 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.privateKey = s.m.identity
	_, err := s.m.Start()
	s.Require().NoError(err)
}

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

func (s *MessengerShareUrlsSuite) newMessenger() *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 *MessengerShareUrlsSuite) createCommunity() *communities.Community {
	description := &requests.CreateCommunity{
		Membership:  protobuf.CommunityPermissions_NO_MEMBERSHIP,
		Name:        "status",
		Color:       "#ffffff",
		Description: "status community description",
	}

	// Create an community chat
	response, err := s.m.CreateCommunity(description, false)
	s.Require().NoError(err)
	s.Require().NotNil(response)
	return response.Communities()[0]
}

func (s *MessengerShareUrlsSuite) createContact() (*Messenger, *Contact) {
	theirMessenger := s.newMessenger()
	_, err := theirMessenger.Start()
	s.Require().NoError(err)

	contactID := types.EncodeHex(crypto.FromECDSAPub(&theirMessenger.identity.PublicKey))
	ensName := "blah.stateofus.eth"

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

	response, err := s.m.AddContact(context.Background(), &requests.AddContact{ID: contactID})
	s.Require().NoError(err)
	s.Require().NotNil(response)
	s.Require().Len(response.Contacts, 1)

	contact := response.Contacts[0]
	s.Require().Equal(ensName, contact.EnsName)
	s.Require().True(contact.ENSVerified)

	return theirMessenger, contact
}

func (s *MessengerShareUrlsSuite) createCommunityWithChannel() (*communities.Community, *protobuf.CommunityChat, string) {
	community := s.createCommunity()

	chat := &protobuf.CommunityChat{
		Permissions: &protobuf.CommunityPermissions{
			Access: protobuf.CommunityPermissions_NO_MEMBERSHIP,
		},
		Identity: &protobuf.ChatIdentity{
			DisplayName: "status-core",
			Emoji:       "😎",
			Description: "status-core community chat",
		},
	}
	response, err := s.m.CreateCommunityChat(community.ID(), chat)
	s.Require().NoError(err)
	s.Require().NotNil(response)
	s.Require().Len(response.Communities(), 1)
	s.Require().Len(response.Chats(), 1)

	community = response.Communities()[0]
	s.Require().Len(community.Chats(), 1)

	var channelID string
	var channel *protobuf.CommunityChat

	for key, value := range community.Chats() {
		channelID = key
		channel = value
		break
	}
	s.Require().NotNil(channel)
	return community, channel, channelID
}

func (s *MessengerShareUrlsSuite) TestDecodeEncodeDataURL() {
	ts := [][]byte{
		[]byte("test data 123"),
		[]byte("test data 123test data 123test data 123test data 123test data 123"),
	}

	for i := range ts {
		encodedData, err := urls.EncodeDataURL(ts[i])
		s.Require().NoError(err)

		decodedData, err := urls.DecodeDataURL(encodedData)
		s.Require().NoError(err)
		s.Require().Equal(ts[i], decodedData)
	}
}

func (s *MessengerShareUrlsSuite) TestSerializePublicKey() {
	key, err := crypto.GenerateKey()
	s.Require().NoError(err)

	serializedKey, err := s.m.SerializePublicKey(crypto.CompressPubkey(&key.PublicKey))

	s.Require().NoError(err)
	s.Require().Len(serializedKey, 49)
	s.Require().True(strings.HasPrefix(serializedKey, "zQ3sh"))
}

func (s *MessengerShareUrlsSuite) TestDeserializePublicKey() {
	serializedKey := "zQ3shPyZJnxZK4Bwyx9QsaksNKDYTPmpwPvGSjMYVHoXHeEgB"

	shortKey, err := s.m.DeserializePublicKey(serializedKey)

	s.Require().NoError(err)
	s.Require().Len(shortKey, 33)
	s.Require().True(strings.HasPrefix(shortKey.String(), "0x"))
}

func (s *MessengerShareUrlsSuite) TestParseWrongUrls() {
	urls := map[string]string{
		"https://status.appc/#zQ3shYSHp7GoiXaauJMnDcjwU2yNjdzpXLosAWapPS4CFxc11":  "unhandled shared url",
		"https://status.app/cc#zQ3shYSHp7GoiXaauJMnDcjwU2yNjdzpXLosAWapPS4CFxc11": "unhandled shared url",
		"https://status.app/a#zQ3shYSHp7GoiXaauJMnDcjwU2yNjdzpXLosAWapPS4CFxc11":  "unhandled shared url",
		"https://status.app/u/": "url should contain at least one `#` separator",
		"https://status.im/u#zQ3shYSHp7GoiXaauJMnDcjwU2yNjdzpXLosAWapPS4CFxc11": "url should start with 'https://status.app'",
	}

	for url, expectedError := range urls {
		urlData, err := s.m.ParseSharedURL(url)
		s.Require().Error(err)

		s.Require().True(strings.HasPrefix(err.Error(), expectedError))
		s.Require().Nil(urlData)
	}
}

func (s *MessengerShareUrlsSuite) TestShareCommunityURLWithChatKey() {
	community := s.createCommunity()

	url, err := s.m.ShareCommunityURLWithChatKey(community.ID())
	s.Require().NoError(err)

	shortKey, err := s.m.SerializePublicKey(community.ID())
	s.Require().NoError(err)

	expectedURL := fmt.Sprintf("%s/c#%s", baseShareURL, shortKey)
	s.Require().Equal(expectedURL, url)
}

func (s *MessengerShareUrlsSuite) TestParseCommunityURLWithChatKey() {
	community := s.createCommunity()

	shortKey, err := s.m.SerializePublicKey(community.ID())
	s.Require().NoError(err)

	url := fmt.Sprintf("%s/c#%s", baseShareURL, shortKey)

	urlData, err := s.m.ParseSharedURL(url)
	s.Require().NoError(err)
	s.Require().NotNil(urlData)

	s.Require().NotNil(urlData.Community)
	s.Require().Equal(community.Identity().DisplayName, urlData.Community.DisplayName)
	s.Require().Equal(community.DescriptionText(), urlData.Community.Description)
	s.Require().Equal(uint32(community.MembersCount()), urlData.Community.MembersCount)
	s.Require().Equal(community.Identity().GetColor(), urlData.Community.Color)
	s.Require().Equal(community.TagsIndices(), urlData.Community.TagIndices)
}

func (s *MessengerShareUrlsSuite) TestShareCommunityURLWithData() {
	community := s.createCommunity()

	url, err := s.m.ShareCommunityURLWithData(community.ID())
	s.Require().NoError(err)

	communityData, signature, err := s.m.prepareEncodedCommunityData(community)
	s.Require().NoError(err)

	expectedURL := fmt.Sprintf("%s/c/%s#%s", baseShareURL, communityData, signature)
	s.Require().Equal(expectedURL, url)
}

func (s *MessengerShareUrlsSuite) TestParseCommunityURLWithData() {
	community := s.createCommunity()

	communityData, signature, err := s.m.prepareEncodedCommunityData(community)
	s.Require().NoError(err)

	url := fmt.Sprintf("%s/c/%s#%s", baseShareURL, communityData, signature)

	urlData, err := s.m.ParseSharedURL(url)
	s.Require().NoError(err)
	s.Require().NotNil(urlData)

	s.Require().NotNil(urlData.Community)
	s.Require().Equal(community.Identity().DisplayName, urlData.Community.DisplayName)
	s.Require().Equal(community.DescriptionText(), urlData.Community.Description)
	s.Require().Equal(uint32(community.MembersCount()), urlData.Community.MembersCount)
	s.Require().Equal(community.Identity().GetColor(), urlData.Community.Color)
	s.Require().Equal(community.TagsIndices(), urlData.Community.TagIndices)
}

func (s *MessengerShareUrlsSuite) TestShareCommunityChannelURLWithChatKey() {
	community := s.createCommunity()
	channelID := "003cdcd5-e065-48f9-b166-b1a94ac75a11"

	request := &requests.CommunityChannelShareURL{
		CommunityID: community.ID(),
		ChannelID:   channelID,
	}
	url, err := s.m.ShareCommunityChannelURLWithChatKey(request)
	s.Require().NoError(err)

	shortKey, err := s.m.SerializePublicKey(community.ID())
	s.Require().NoError(err)

	expectedURL := fmt.Sprintf("%s/cc/%s#%s", baseShareURL, channelID, shortKey)
	s.Require().Equal(expectedURL, url)
}

func (s *MessengerShareUrlsSuite) TestParseCommunityChannelURLWithChatKey() {
	community, channel, channelID := s.createCommunityWithChannel()

	shortKey, err := s.m.SerializePublicKey(community.ID())
	s.Require().NoError(err)

	url := fmt.Sprintf("%s/cc/%s#%s", baseShareURL, channelID, shortKey)

	urlData, err := s.m.ParseSharedURL(url)
	s.Require().NoError(err)
	s.Require().NotNil(urlData)

	s.Require().NotNil(urlData.Community)
	s.Require().Equal(community.Identity().DisplayName, urlData.Community.DisplayName)
	s.Require().Equal(community.DescriptionText(), urlData.Community.Description)
	s.Require().Equal(uint32(community.MembersCount()), urlData.Community.MembersCount)
	s.Require().Equal(community.Identity().GetColor(), urlData.Community.Color)
	s.Require().Equal(community.TagsIndices(), urlData.Community.TagIndices)

	s.Require().NotNil(urlData.Channel)
	s.Require().Equal(channel.Identity.Emoji, urlData.Channel.Emoji)
	s.Require().Equal(channel.Identity.DisplayName, urlData.Channel.DisplayName)
	s.Require().Equal(channel.Identity.Color, urlData.Channel.Color)
}

func (s *MessengerShareUrlsSuite) TestShareCommunityChannelURLWithData() {
	community, channel, channelID := s.createCommunityWithChannel()

	request := &requests.CommunityChannelShareURL{
		CommunityID: community.ID(),
		ChannelID:   channelID,
	}
	url, err := s.m.ShareCommunityChannelURLWithData(request)
	s.Require().NoError(err)

	communityData, signature, err := s.m.prepareEncodedCommunityChannelData(community, channel, channelID)
	s.Require().NoError(err)

	expectedURL := fmt.Sprintf("%s/cc/%s#%s", baseShareURL, communityData, signature)
	s.Require().Equal(expectedURL, url)
}

func (s *MessengerShareUrlsSuite) TestParseCommunityChannelURLWithData() {
	community, channel, channelID := s.createCommunityWithChannel()

	communityChannelData, signature, err := s.m.prepareEncodedCommunityChannelData(community, channel, channelID)
	s.Require().NoError(err)

	url := fmt.Sprintf("%s/cc/%s#%s", baseShareURL, communityChannelData, signature)

	urlData, err := s.m.ParseSharedURL(url)
	s.Require().NoError(err)
	s.Require().NotNil(urlData)

	s.Require().NotNil(urlData.Community)
	s.Require().Equal(community.Identity().DisplayName, urlData.Community.DisplayName)
	s.Require().Equal(community.DescriptionText(), urlData.Community.Description)
	s.Require().Equal(uint32(community.MembersCount()), urlData.Community.MembersCount)
	s.Require().Equal(community.Identity().GetColor(), urlData.Community.Color)
	s.Require().Equal(community.TagsIndices(), urlData.Community.TagIndices)

	s.Require().NotNil(urlData.Channel)
	s.Require().Equal(channel.Identity.Emoji, urlData.Channel.Emoji)
	s.Require().Equal(channel.Identity.DisplayName, urlData.Channel.DisplayName)
	s.Require().Equal(channel.Identity.Color, urlData.Channel.Color)
}

func (s *MessengerShareUrlsSuite) TestShareUserURLWithChatKey() {
	_, contact := s.createContact()

	url, err := s.m.ShareUserURLWithChatKey(contact.ID)
	s.Require().NoError(err)

	publicKey, err := common.HexToPubkey(contact.ID)
	s.Require().NoError(err)

	shortKey, err := s.m.SerializePublicKey(crypto.CompressPubkey(publicKey))
	s.Require().NoError(err)

	expectedURL := fmt.Sprintf("%s/u#%s", baseShareURL, shortKey)
	s.Require().Equal(expectedURL, url)
}

func (s *MessengerShareUrlsSuite) TestParseUserURLWithChatKey() {
	_, contact := s.createContact()

	publicKey, err := common.HexToPubkey(contact.ID)
	s.Require().NoError(err)

	shortKey, err := s.m.SerializePublicKey(crypto.CompressPubkey(publicKey))
	s.Require().NoError(err)

	url := fmt.Sprintf("%s/u#%s", baseShareURL, shortKey)

	urlData, err := s.m.ParseSharedURL(url)
	s.Require().NoError(err)
	s.Require().NotNil(urlData)

	s.Require().NotNil(urlData.Contact)
	s.Require().Equal(contact.DisplayName, urlData.Contact.DisplayName)
	s.Require().Equal(contact.Bio, urlData.Contact.DisplayName)
}

func (s *MessengerShareUrlsSuite) TestShareUserURLWithENS() {
	_, contact := s.createContact()

	url, err := s.m.ShareUserURLWithENS(contact.ID)
	s.Require().NoError(err)

	expectedURL := fmt.Sprintf("%s/u#%s", baseShareURL, contact.EnsName)
	s.Require().Equal(expectedURL, url)
}

// TODO: ens in the next ticket
// func (s *MessengerShareUrlsSuite) TestParseUserURLWithENS() {
// 	_, contact := s.createContact()

// 	url := fmt.Sprintf("%s/u#%s", baseShareURL, contact.EnsName)

// 	urlData, err := s.m.ParseSharedURL(url)
// 	s.Require().NoError(err)
// 	s.Require().NotNil(urlData)

// 	s.Require().NotNil(urlData.Contact)
// 	s.Require().Equal(contact.DisplayName, urlData.Contact.DisplayName)
//  s.Require().Equal(contact.Bio, urlData.Contact.DisplayName)
// }

func (s *MessengerShareUrlsSuite) TestShareUserURLWithData() {
	_, contact := s.createContact()

	url, err := s.m.ShareUserURLWithData(contact.ID)
	s.Require().NoError(err)

	userData, signature, err := s.m.prepareEncodedUserData(contact)
	s.Require().NoError(err)

	expectedURL := fmt.Sprintf("%s/u/%s#%s", baseShareURL, userData, signature)
	s.Require().Equal(expectedURL, url)
}

func (s *MessengerShareUrlsSuite) TestParseUserURLWithData() {
	_, contact := s.createContact()

	userData, signature, err := s.m.prepareEncodedUserData(contact)
	s.Require().NoError(err)

	url := fmt.Sprintf("%s/u/%s#%s", baseShareURL, userData, signature)

	urlData, err := s.m.ParseSharedURL(url)
	s.Require().NoError(err)
	s.Require().NotNil(urlData)

	s.Require().NotNil(urlData.Contact)
	s.Require().Equal(contact.DisplayName, urlData.Contact.DisplayName)
	s.Require().Equal(contact.Bio, urlData.Contact.Description)
}