// VulcanizeDB
// Copyright © 2019 Vulcanize

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.

// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package integration

import (
	"fmt"
	"strings"

	"github.com/ethereum/go-ethereum/common"
	. "github.com/onsi/ginkgo"
	. "github.com/onsi/gomega"

	"github.com/vulcanize/vulcanizedb/pkg/config"
	"github.com/vulcanize/vulcanizedb/pkg/contract_watcher/header/transformer"
	"github.com/vulcanize/vulcanizedb/pkg/contract_watcher/shared/constants"
	"github.com/vulcanize/vulcanizedb/pkg/contract_watcher/shared/helpers/test_helpers"
	"github.com/vulcanize/vulcanizedb/pkg/contract_watcher/shared/helpers/test_helpers/mocks"
	"github.com/vulcanize/vulcanizedb/pkg/core"
	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres/repositories"
)

var _ = Describe("contractWatcher headerSync transformer", func() {
	var db *postgres.DB
	var err error
	var blockChain core.BlockChain
	var headerRepository repositories.HeaderRepository
	var headerID int64
	var ensAddr = strings.ToLower(constants.EnsContractAddress)
	var tusdAddr = strings.ToLower(constants.TusdContractAddress)

	BeforeEach(func() {
		db, blockChain = test_helpers.SetupDBandBC()
		headerRepository = repositories.NewHeaderRepository(db)
	})

	AfterEach(func() {
		test_helpers.TearDown(db)
	})

	Describe("Init", func() {
		It("Initializes transformer's contract objects", func() {
			_, insertErr := headerRepository.CreateOrUpdateHeader(mocks.MockHeader1)
			Expect(insertErr).NotTo(HaveOccurred())
			_, insertErrTwo := headerRepository.CreateOrUpdateHeader(mocks.MockHeader3)
			Expect(insertErrTwo).NotTo(HaveOccurred())
			t := transformer.NewTransformer(test_helpers.TusdConfig, blockChain, db)
			err = t.Init()
			Expect(err).ToNot(HaveOccurred())

			c, ok := t.Contracts[tusdAddr]
			Expect(ok).To(Equal(true))

			// TODO: Fix this
			// This test sometimes randomly fails because
			// for some reason the starting block number is not updated from
			// its original value (5197514) to the block number (6194632)
			// of the earliest header (mocks.MockHeader1) in the repository
			// It is not clear how this happens without one of the above insertErrs
			// having been thrown and without any errors thrown during the Init() call
			Expect(c.StartingBlock).To(Equal(int64(6194632)))
			Expect(c.Abi).To(Equal(constants.TusdAbiString))
			Expect(c.Name).To(Equal("TrueUSD"))
			Expect(c.Address).To(Equal(tusdAddr))
		})

		It("Fails to initialize if first and block cannot be fetched from vDB headers table", func() {
			t := transformer.NewTransformer(test_helpers.TusdConfig, blockChain, db)
			err = t.Init()
			Expect(err).To(HaveOccurred())
			Expect(err.Error()).To(ContainSubstring("no rows in result set"))
		})

		It("Does nothing if nothing if no addresses are configured", func() {
			_, insertErr := headerRepository.CreateOrUpdateHeader(mocks.MockHeader1)
			Expect(insertErr).NotTo(HaveOccurred())
			_, insertErrTwo := headerRepository.CreateOrUpdateHeader(mocks.MockHeader3)
			Expect(insertErrTwo).NotTo(HaveOccurred())
			var testConf config.ContractConfig
			testConf = test_helpers.TusdConfig
			testConf.Addresses = nil
			t := transformer.NewTransformer(testConf, blockChain, db)
			err = t.Init()
			Expect(err).ToNot(HaveOccurred())

			_, ok := t.Contracts[tusdAddr]
			Expect(ok).To(Equal(false))
		})
	})

	Describe("Execute- against TrueUSD contract", func() {
		BeforeEach(func() {
			header1, err := blockChain.GetHeaderByNumber(6791668)
			Expect(err).ToNot(HaveOccurred())
			header2, err := blockChain.GetHeaderByNumber(6791669)
			Expect(err).ToNot(HaveOccurred())
			header3, err := blockChain.GetHeaderByNumber(6791670)
			Expect(err).ToNot(HaveOccurred())
			headerRepository.CreateOrUpdateHeader(header1)
			headerID, err = headerRepository.CreateOrUpdateHeader(header2)
			Expect(err).ToNot(HaveOccurred())
			headerRepository.CreateOrUpdateHeader(header3)
		})

		It("Transforms watched contract data into custom repositories", func() {
			t := transformer.NewTransformer(test_helpers.TusdConfig, blockChain, db)
			err = t.Init()
			Expect(err).ToNot(HaveOccurred())
			err = t.Execute()
			Expect(err).ToNot(HaveOccurred())

			log := test_helpers.HeaderSyncTransferLog{}
			err = db.QueryRowx(fmt.Sprintf("SELECT * FROM header_%s.transfer_event", tusdAddr)).StructScan(&log)
			Expect(err).ToNot(HaveOccurred())
			// We don't know vulcID, so compare individual fields instead of complete structures
			Expect(log.HeaderID).To(Equal(headerID))
			Expect(log.From).To(Equal("0x1062a747393198f70F71ec65A582423Dba7E5Ab3"))
			Expect(log.To).To(Equal("0x2930096dB16b4A44Ecd4084EA4bd26F7EeF1AEf0"))
			Expect(log.Value).To(Equal("9998940000000000000000"))
		})

		It("Keeps track of contract-related addresses while transforming event data if they need to be used for later method polling", func() {
			var testConf config.ContractConfig
			testConf = test_helpers.TusdConfig
			testConf.Methods = map[string][]string{
				tusdAddr: {"balanceOf"},
			}
			t := transformer.NewTransformer(testConf, blockChain, db)
			err = t.Init()
			Expect(err).ToNot(HaveOccurred())
			c, ok := t.Contracts[tusdAddr]
			Expect(ok).To(Equal(true))
			err = t.Execute()
			Expect(err).ToNot(HaveOccurred())
			Expect(len(c.EmittedAddrs)).To(Equal(4))
			Expect(len(c.EmittedHashes)).To(Equal(0))

			b, ok := c.EmittedAddrs[common.HexToAddress("0x1062a747393198f70F71ec65A582423Dba7E5Ab3")]
			Expect(ok).To(Equal(true))
			Expect(b).To(Equal(true))

			b, ok = c.EmittedAddrs[common.HexToAddress("0x2930096dB16b4A44Ecd4084EA4bd26F7EeF1AEf0")]
			Expect(ok).To(Equal(true))
			Expect(b).To(Equal(true))

			b, ok = c.EmittedAddrs[common.HexToAddress("0x571A326f5B15E16917dC17761c340c1ec5d06f6d")]
			Expect(ok).To(Equal(true))
			Expect(b).To(Equal(true))

			b, ok = c.EmittedAddrs[common.HexToAddress("0xFBb1b73C4f0BDa4f67dcA266ce6Ef42f520fBB98")]
			Expect(ok).To(Equal(true))
			Expect(b).To(Equal(true))

			_, ok = c.EmittedAddrs[common.HexToAddress("0x09BbBBE21a5975cAc061D82f7b843b1234567890")]
			Expect(ok).To(Equal(false))

			_, ok = c.EmittedAddrs[common.HexToAddress("0x")]
			Expect(ok).To(Equal(false))

			_, ok = c.EmittedAddrs[""]
			Expect(ok).To(Equal(false))

			_, ok = c.EmittedAddrs[common.HexToAddress("0x09THISE21a5IS5cFAKE1D82fAND43bCE06MADEUP")]
			Expect(ok).To(Equal(false))
		})

		It("Polls given methods using generated token holder address", func() {
			var testConf config.ContractConfig
			testConf = test_helpers.TusdConfig
			testConf.Methods = map[string][]string{
				tusdAddr: {"balanceOf"},
			}
			t := transformer.NewTransformer(testConf, blockChain, db)
			err = t.Init()
			Expect(err).ToNot(HaveOccurred())
			err = t.Execute()
			Expect(err).ToNot(HaveOccurred())

			res := test_helpers.BalanceOf{}
			err = db.QueryRowx(fmt.Sprintf("SELECT * FROM header_%s.balanceof_method WHERE who_ = '0x1062a747393198f70F71ec65A582423Dba7E5Ab3' AND block = '6791669'", tusdAddr)).StructScan(&res)
			Expect(err).ToNot(HaveOccurred())
			Expect(res.Balance).To(Equal("55849938025000000000000"))
			Expect(res.TokenName).To(Equal("TrueUSD"))

			err = db.QueryRowx(fmt.Sprintf("SELECT * FROM header_%s.balanceof_method WHERE who_ = '0x09BbBBE21a5975cAc061D82f7b843b1234567890' AND block = '6791669'", tusdAddr)).StructScan(&res)
			Expect(err).To(HaveOccurred())
			Expect(err.Error()).To(ContainSubstring("no rows in result set"))
		})

		It("Fails if initialization has not been done", func() {
			t := transformer.NewTransformer(test_helpers.TusdConfig, blockChain, db)
			err = t.Execute()
			Expect(err).To(HaveOccurred())
			Expect(err.Error()).To(ContainSubstring("transformer has no initialized contracts"))
		})
	})

	Describe("Execute- against ENS registry contract", func() {
		BeforeEach(func() {
			header1, err := blockChain.GetHeaderByNumber(6885695)
			Expect(err).ToNot(HaveOccurred())
			header2, err := blockChain.GetHeaderByNumber(6885696)
			Expect(err).ToNot(HaveOccurred())
			header3, err := blockChain.GetHeaderByNumber(6885697)
			Expect(err).ToNot(HaveOccurred())
			headerRepository.CreateOrUpdateHeader(header1)
			headerID, err = headerRepository.CreateOrUpdateHeader(header2)
			Expect(err).ToNot(HaveOccurred())
			headerRepository.CreateOrUpdateHeader(header3)
		})

		It("Transforms watched contract data into custom repositories", func() {
			t := transformer.NewTransformer(test_helpers.ENSConfig, blockChain, db)
			err = t.Init()
			Expect(err).ToNot(HaveOccurred())
			err = t.Execute()
			Expect(err).ToNot(HaveOccurred())
			Expect(t.Start).To(Equal(int64(6885698)))

			log := test_helpers.HeaderSyncNewOwnerLog{}
			err = db.QueryRowx(fmt.Sprintf("SELECT * FROM header_%s.newowner_event", ensAddr)).StructScan(&log)
			Expect(err).ToNot(HaveOccurred())
			// We don't know vulcID, so compare individual fields instead of complete structures
			Expect(log.HeaderID).To(Equal(headerID))
			Expect(log.Node).To(Equal("0x93cdeb708b7545dc668eb9280176169d1c33cfd8ed6f04690a0bcc88a93fc4ae"))
			Expect(log.Label).To(Equal("0x95832c7a47ff8a7840e28b78ce695797aaf402b1c186bad9eca28842625b5047"))
			Expect(log.Owner).To(Equal("0x6090A6e47849629b7245Dfa1Ca21D94cd15878Ef"))
		})

		It("Keeps track of contract-related hashes while transforming event data if they need to be used for later method polling", func() {
			var testConf config.ContractConfig
			testConf = test_helpers.ENSConfig
			testConf.Methods = map[string][]string{
				ensAddr: {"owner"},
			}
			t := transformer.NewTransformer(testConf, blockChain, db)
			err = t.Init()
			Expect(err).ToNot(HaveOccurred())
			c, ok := t.Contracts[ensAddr]
			Expect(ok).To(Equal(true))
			err = t.Execute()
			Expect(err).ToNot(HaveOccurred())
			Expect(len(c.EmittedHashes)).To(Equal(2))
			Expect(len(c.EmittedAddrs)).To(Equal(0))

			b, ok := c.EmittedHashes[common.HexToHash("0x93cdeb708b7545dc668eb9280176169d1c33cfd8ed6f04690a0bcc88a93fc4ae")]
			Expect(ok).To(Equal(true))
			Expect(b).To(Equal(true))

			b, ok = c.EmittedHashes[common.HexToHash("0x95832c7a47ff8a7840e28b78ce695797aaf402b1c186bad9eca28842625b5047")]
			Expect(ok).To(Equal(true))
			Expect(b).To(Equal(true))

			// Doesn't keep track of address since it wouldn't be used in calling the 'owner' method
			_, ok = c.EmittedAddrs[common.HexToAddress("0x6090A6e47849629b7245Dfa1Ca21D94cd15878Ef")]
			Expect(ok).To(Equal(false))
		})

		It("Polls given method using list of collected hashes", func() {
			var testConf config.ContractConfig
			testConf = test_helpers.ENSConfig
			testConf.Methods = map[string][]string{
				ensAddr: {"owner"},
			}
			t := transformer.NewTransformer(testConf, blockChain, db)
			err = t.Init()
			Expect(err).ToNot(HaveOccurred())
			err = t.Execute()
			Expect(err).ToNot(HaveOccurred())

			res := test_helpers.Owner{}
			err = db.QueryRowx(fmt.Sprintf("SELECT * FROM header_%s.owner_method WHERE node_ = '0x93cdeb708b7545dc668eb9280176169d1c33cfd8ed6f04690a0bcc88a93fc4ae' AND block = '6885696'", ensAddr)).StructScan(&res)
			Expect(err).ToNot(HaveOccurred())
			Expect(res.Address).To(Equal("0x6090A6e47849629b7245Dfa1Ca21D94cd15878Ef"))
			Expect(res.TokenName).To(Equal(""))

			err = db.QueryRowx(fmt.Sprintf("SELECT * FROM header_%s.owner_method WHERE node_ = '0x95832c7a47ff8a7840e28b78ce695797aaf402b1c186bad9eca28842625b5047' AND block = '6885696'", ensAddr)).StructScan(&res)
			Expect(err).ToNot(HaveOccurred())
			Expect(res.Address).To(Equal("0x0000000000000000000000000000000000000000"))
			Expect(res.TokenName).To(Equal(""))

			err = db.QueryRowx(fmt.Sprintf("SELECT * FROM header_%s.owner_method WHERE node_ = '0x9THIS110dcc444fIS242510c09bbAbe21aFAKEcacNODE82f7b843HASH61ba391' AND block = '6885696'", ensAddr)).StructScan(&res)
			Expect(err).To(HaveOccurred())
			Expect(err.Error()).To(ContainSubstring("no rows in result set"))
		})

		It("It does not persist events if they do not pass the emitted arg filter", func() {
			var testConf config.ContractConfig
			testConf = test_helpers.ENSConfig
			testConf.EventArgs = map[string][]string{
				ensAddr: {"fake_filter_value"},
			}
			t := transformer.NewTransformer(testConf, blockChain, db)
			err = t.Init()
			Expect(err).ToNot(HaveOccurred())
			err = t.Execute()
			Expect(err).ToNot(HaveOccurred())

			log := test_helpers.HeaderSyncNewOwnerLog{}
			err = db.QueryRowx(fmt.Sprintf("SELECT * FROM header_%s.newowner_event", ensAddr)).StructScan(&log)
			Expect(err).To(HaveOccurred())
			Expect(err.Error()).To(ContainSubstring("does not exist"))
		})

		It("If a method arg filter is applied, only those arguments are used in polling", func() {
			var testConf config.ContractConfig
			testConf = test_helpers.ENSConfig
			testConf.MethodArgs = map[string][]string{
				ensAddr: {"0x93cdeb708b7545dc668eb9280176169d1c33cfd8ed6f04690a0bcc88a93fc4ae"},
			}
			testConf.Methods = map[string][]string{
				ensAddr: {"owner"},
			}
			t := transformer.NewTransformer(testConf, blockChain, db)
			err = t.Init()
			Expect(err).ToNot(HaveOccurred())
			err = t.Execute()
			Expect(err).ToNot(HaveOccurred())

			res := test_helpers.Owner{}
			err = db.QueryRowx(fmt.Sprintf("SELECT * FROM header_%s.owner_method WHERE node_ = '0x93cdeb708b7545dc668eb9280176169d1c33cfd8ed6f04690a0bcc88a93fc4ae' AND block = '6885696'", ensAddr)).StructScan(&res)
			Expect(err).ToNot(HaveOccurred())
			Expect(res.Address).To(Equal("0x6090A6e47849629b7245Dfa1Ca21D94cd15878Ef"))
			Expect(res.TokenName).To(Equal(""))

			err = db.QueryRowx(fmt.Sprintf("SELECT * FROM header_%s.owner_method WHERE node_ = '0x95832c7a47ff8a7840e28b78ce695797aaf402b1c186bad9eca28842625b5047' AND block = '6885696'", ensAddr)).StructScan(&res)
			Expect(err).To(HaveOccurred())
			Expect(err.Error()).To(ContainSubstring("no rows in result set"))
		})
	})

	Describe("Execute- against both ENS and TrueUSD", func() {
		BeforeEach(func() {
			for i := 6885692; i <= 6885701; i++ {
				header, err := blockChain.GetHeaderByNumber(int64(i))
				Expect(err).ToNot(HaveOccurred())
				_, err = headerRepository.CreateOrUpdateHeader(header)
				Expect(err).ToNot(HaveOccurred())
			}
		})

		It("Transforms watched contract data into custom repositories", func() {
			t := transformer.NewTransformer(test_helpers.ENSandTusdConfig, blockChain, db)
			err = t.Init()
			Expect(err).ToNot(HaveOccurred())
			err = t.Execute()
			Expect(err).ToNot(HaveOccurred())
			Expect(t.Start).To(Equal(int64(6885702)))

			newOwnerLog := test_helpers.HeaderSyncNewOwnerLog{}
			err = db.QueryRowx(fmt.Sprintf("SELECT * FROM header_%s.newowner_event", ensAddr)).StructScan(&newOwnerLog)
			Expect(err).ToNot(HaveOccurred())
			// We don't know vulcID, so compare individual fields instead of complete structures
			Expect(newOwnerLog.Node).To(Equal("0x93cdeb708b7545dc668eb9280176169d1c33cfd8ed6f04690a0bcc88a93fc4ae"))
			Expect(newOwnerLog.Label).To(Equal("0x95832c7a47ff8a7840e28b78ce695797aaf402b1c186bad9eca28842625b5047"))
			Expect(newOwnerLog.Owner).To(Equal("0x6090A6e47849629b7245Dfa1Ca21D94cd15878Ef"))

			transferLog := test_helpers.HeaderSyncTransferLog{}
			err = db.QueryRowx(fmt.Sprintf("SELECT * FROM header_%s.transfer_event", tusdAddr)).StructScan(&transferLog)
			Expect(err).ToNot(HaveOccurred())
			// We don't know vulcID, so compare individual fields instead of complete structures
			Expect(transferLog.From).To(Equal("0x8cA465764873E71CEa525F5EB6AE973d650c22C2"))
			Expect(transferLog.To).To(Equal("0xc338482360651E5D30BEd77b7c85358cbBFB2E0e"))
			Expect(transferLog.Value).To(Equal("2800000000000000000000"))
		})

		It("Keeps track of contract-related hashes and addresses while transforming event data if they need to be used for later method polling", func() {
			var testConf config.ContractConfig
			testConf = test_helpers.ENSandTusdConfig
			testConf.Methods = map[string][]string{
				ensAddr:  {"owner"},
				tusdAddr: {"balanceOf"},
			}
			t := transformer.NewTransformer(testConf, blockChain, db)
			err = t.Init()
			Expect(err).ToNot(HaveOccurred())
			ens, ok := t.Contracts[ensAddr]
			Expect(ok).To(Equal(true))
			tusd, ok := t.Contracts[tusdAddr]
			Expect(ok).To(Equal(true))
			err = t.Execute()
			Expect(err).ToNot(HaveOccurred())
			Expect(len(ens.EmittedHashes)).To(Equal(2))
			Expect(len(ens.EmittedAddrs)).To(Equal(0))
			Expect(len(tusd.EmittedAddrs)).To(Equal(2))
			Expect(len(tusd.EmittedHashes)).To(Equal(0))

			b, ok := ens.EmittedHashes[common.HexToHash("0x93cdeb708b7545dc668eb9280176169d1c33cfd8ed6f04690a0bcc88a93fc4ae")]
			Expect(ok).To(Equal(true))
			Expect(b).To(Equal(true))

			b, ok = ens.EmittedHashes[common.HexToHash("0x95832c7a47ff8a7840e28b78ce695797aaf402b1c186bad9eca28842625b5047")]
			Expect(ok).To(Equal(true))
			Expect(b).To(Equal(true))

			b, ok = tusd.EmittedAddrs[common.HexToAddress("0x8cA465764873E71CEa525F5EB6AE973d650c22C2")]
			Expect(ok).To(Equal(true))
			Expect(b).To(Equal(true))

			b, ok = tusd.EmittedAddrs[common.HexToAddress("0xc338482360651E5D30BEd77b7c85358cbBFB2E0e")]
			Expect(ok).To(Equal(true))
			Expect(b).To(Equal(true))

			_, ok = tusd.EmittedAddrs[common.HexToAddress("0x6090A6e47849629b7245Dfa1Ca21D94cd15878Ef")]
			Expect(ok).To(Equal(false))
		})

		It("Polls given methods for each contract, using list of collected values", func() {
			var testConf config.ContractConfig
			testConf = test_helpers.ENSandTusdConfig
			testConf.Methods = map[string][]string{
				ensAddr:  {"owner"},
				tusdAddr: {"balanceOf"},
			}
			t := transformer.NewTransformer(testConf, blockChain, db)
			err = t.Init()
			Expect(err).ToNot(HaveOccurred())
			err = t.Execute()
			Expect(err).ToNot(HaveOccurred())

			owner := test_helpers.Owner{}
			err = db.QueryRowx(fmt.Sprintf("SELECT * FROM header_%s.owner_method WHERE node_ = '0x93cdeb708b7545dc668eb9280176169d1c33cfd8ed6f04690a0bcc88a93fc4ae' AND block = '6885696'", ensAddr)).StructScan(&owner)
			Expect(err).ToNot(HaveOccurred())
			Expect(owner.Address).To(Equal("0x6090A6e47849629b7245Dfa1Ca21D94cd15878Ef"))
			Expect(owner.TokenName).To(Equal(""))

			err = db.QueryRowx(fmt.Sprintf("SELECT * FROM header_%s.owner_method WHERE node_ = '0x95832c7a47ff8a7840e28b78ce695797aaf402b1c186bad9eca28842625b5047' AND block = '6885696'", ensAddr)).StructScan(&owner)
			Expect(err).ToNot(HaveOccurred())
			Expect(owner.Address).To(Equal("0x0000000000000000000000000000000000000000"))
			Expect(owner.TokenName).To(Equal(""))

			err = db.QueryRowx(fmt.Sprintf("SELECT * FROM header_%s.owner_method WHERE node_ = '0x95832c7a47ff8a7840e28b78ceMADEUPaaf4HASHc186badTHItransformers.8IS625bFAKE' AND block = '6885696'", ensAddr)).StructScan(&owner)
			Expect(err).To(HaveOccurred())
			Expect(err.Error()).To(ContainSubstring("no rows in result set"))

			bal := test_helpers.BalanceOf{}
			err = db.QueryRowx(fmt.Sprintf("SELECT * FROM header_%s.balanceof_method WHERE who_ = '0x8cA465764873E71CEa525F5EB6AE973d650c22C2' AND block = '6885701'", tusdAddr)).StructScan(&bal)
			Expect(err).ToNot(HaveOccurred())
			Expect(bal.Balance).To(Equal("1954436000000000000000"))
			Expect(bal.TokenName).To(Equal("TrueUSD"))

			err = db.QueryRowx(fmt.Sprintf("SELECT * FROM header_%s.balanceof_method WHERE who_ = '0x09BbBBE21a5975cAc061D82f7b843b1234567890' AND block = '6885701'", tusdAddr)).StructScan(&bal)
			Expect(err).To(HaveOccurred())
			Expect(err.Error()).To(ContainSubstring("no rows in result set"))
		})
	})
})