package testing

import (
	"github.com/8thlight/vulcanizedb/pkg/core"
	"github.com/8thlight/vulcanizedb/pkg/repositories"
	. "github.com/onsi/ginkgo"
	. "github.com/onsi/gomega"
)

func ClearData(postgres repositories.Postgres) {
	postgres.Db.MustExec("DELETE FROM watched_contracts")
	postgres.Db.MustExec("DELETE FROM transactions")
	postgres.Db.MustExec("DELETE FROM blocks")
}

func AssertRepositoryBehavior(buildRepository func() repositories.Repository) {
	var repository repositories.Repository

	BeforeEach(func() {
		repository = buildRepository()
	})

	Describe("Saving blocks", func() {
		It("starts with no blocks", func() {
			count := repository.BlockCount()
			Expect(count).Should(Equal(0))
		})

		It("increments the block count", func() {
			block := core.Block{Number: 123}

			repository.CreateBlock(block)

			Expect(repository.BlockCount()).To(Equal(1))
		})

		It("saves the attributes of the block", func() {
			blockNumber := int64(123)
			gasLimit := int64(1000000)
			gasUsed := int64(10)
			blockHash := "x123"
			blockParentHash := "x456"
			blockNonce := "0x881db2ca900682e9a9"
			blockTime := int64(1508981640)
			uncleHash := "x789"
			blockSize := int64(1000)
			difficulty := int64(10)
			block := core.Block{
				Difficulty: difficulty,
				GasLimit:   gasLimit,
				GasUsed:    gasUsed,
				Hash:       blockHash,
				Nonce:      blockNonce,
				Number:     blockNumber,
				ParentHash: blockParentHash,
				Size:       blockSize,
				Time:       blockTime,
				UncleHash:  uncleHash,
			}

			repository.CreateBlock(block)

			savedBlock := repository.FindBlockByNumber(blockNumber)
			Expect(savedBlock.Difficulty).To(Equal(difficulty))
			Expect(savedBlock.GasLimit).To(Equal(gasLimit))
			Expect(savedBlock.GasUsed).To(Equal(gasUsed))
			Expect(savedBlock.Hash).To(Equal(blockHash))
			Expect(savedBlock.Nonce).To(Equal(blockNonce))
			Expect(savedBlock.Number).To(Equal(blockNumber))
			Expect(savedBlock.ParentHash).To(Equal(blockParentHash))
			Expect(savedBlock.Size).To(Equal(blockSize))
			Expect(savedBlock.Time).To(Equal(blockTime))
			Expect(savedBlock.UncleHash).To(Equal(uncleHash))
		})

		It("does not find a block when searching for a number that does not exist", func() {
			savedBlock := repository.FindBlockByNumber(111)

			Expect(savedBlock).To(BeNil())
		})

		It("saves one transaction associated to the block", func() {
			block := core.Block{
				Number:       123,
				Transactions: []core.Transaction{{}},
			}

			repository.CreateBlock(block)

			savedBlock := repository.FindBlockByNumber(123)
			Expect(len(savedBlock.Transactions)).To(Equal(1))
		})

		It("saves two transactions associated to the block", func() {
			block := core.Block{
				Number:       123,
				Transactions: []core.Transaction{{}, {}},
			}

			repository.CreateBlock(block)

			savedBlock := repository.FindBlockByNumber(123)
			Expect(len(savedBlock.Transactions)).To(Equal(2))
		})

		It("saves the attributes associated to a transaction", func() {
			gasLimit := int64(5000)
			gasPrice := int64(3)
			nonce := uint64(10000)
			to := "1234567890"
			from := "0987654321"
			value := int64(10)
			transaction := core.Transaction{
				Hash:     "x1234",
				GasPrice: gasPrice,
				GasLimit: gasLimit,
				Nonce:    nonce,
				To:       to,
				From:     from,
				Value:    value,
			}
			block := core.Block{
				Number:       123,
				Transactions: []core.Transaction{transaction},
			}

			repository.CreateBlock(block)

			savedBlock := repository.FindBlockByNumber(123)
			Expect(len(savedBlock.Transactions)).To(Equal(1))
			savedTransaction := savedBlock.Transactions[0]
			Expect(savedTransaction.Hash).To(Equal(transaction.Hash))
			Expect(savedTransaction.To).To(Equal(to))
			Expect(savedTransaction.From).To(Equal(from))
			Expect(savedTransaction.Nonce).To(Equal(nonce))
			Expect(savedTransaction.GasLimit).To(Equal(gasLimit))
			Expect(savedTransaction.GasPrice).To(Equal(gasPrice))
			Expect(savedTransaction.Value).To(Equal(value))
		})

	})

	Describe("The missing block numbers", func() {
		It("is empty the starting block number is the highest known block number", func() {
			repository.CreateBlock(core.Block{Number: 1})

			Expect(len(repository.MissingBlockNumbers(1, 1))).To(Equal(0))
		})

		It("is the only missing block number", func() {
			repository.CreateBlock(core.Block{Number: 2})

			Expect(repository.MissingBlockNumbers(1, 2)).To(Equal([]int64{1}))
		})

		It("is both missing block numbers", func() {
			repository.CreateBlock(core.Block{Number: 3})

			Expect(repository.MissingBlockNumbers(1, 3)).To(Equal([]int64{1, 2}))
		})

		It("goes back to the starting block number", func() {
			repository.CreateBlock(core.Block{Number: 6})

			Expect(repository.MissingBlockNumbers(4, 6)).To(Equal([]int64{4, 5}))
		})

		It("only includes missing block numbers", func() {
			repository.CreateBlock(core.Block{Number: 4})
			repository.CreateBlock(core.Block{Number: 6})

			Expect(repository.MissingBlockNumbers(4, 6)).To(Equal([]int64{5}))
		})

		It("is a list with multiple gaps", func() {
			repository.CreateBlock(core.Block{Number: 4})
			repository.CreateBlock(core.Block{Number: 5})
			repository.CreateBlock(core.Block{Number: 8})
			repository.CreateBlock(core.Block{Number: 10})

			Expect(repository.MissingBlockNumbers(3, 10)).To(Equal([]int64{3, 6, 7, 9}))
		})

		It("returns empty array when lower bound exceeds upper bound", func() {
			Expect(repository.MissingBlockNumbers(10000, 1)).To(Equal([]int64{}))
		})

		It("only returns requested range even when other gaps exist", func() {
			repository.CreateBlock(core.Block{Number: 3})
			repository.CreateBlock(core.Block{Number: 8})

			Expect(repository.MissingBlockNumbers(1, 5)).To(Equal([]int64{1, 2, 4, 5}))
		})
	})

	Describe("The max block numbers", func() {
		It("returns the block number when a single block", func() {
			repository.CreateBlock(core.Block{Number: 1})

			Expect(repository.MaxBlockNumber()).To(Equal(int64(1)))
		})

		It("returns highest known block number when multiple blocks", func() {
			repository.CreateBlock(core.Block{Number: 1})
			repository.CreateBlock(core.Block{Number: 10})

			Expect(repository.MaxBlockNumber()).To(Equal(int64(10)))
		})
	})

	Describe("Creating watched contracts", func() {
		It("returns the watched contract when it exists", func() {
			repository.CreateWatchedContract(core.WatchedContract{Hash: "x123"})

			watchedContract := repository.FindWatchedContract("x123")
			Expect(watchedContract).NotTo(BeNil())
			Expect(watchedContract.Hash).To(Equal("x123"))

			Expect(repository.IsWatchedContract("x123")).To(BeTrue())
			Expect(repository.IsWatchedContract("x456")).To(BeFalse())
		})

		It("returns nil if contract does not exist", func() {
			watchedContract := repository.FindWatchedContract("x123")
			Expect(watchedContract).To(BeNil())
		})

		It("returns empty array when no transactions 'To' a watched contract", func() {
			repository.CreateWatchedContract(core.WatchedContract{Hash: "x123"})
			watchedContract := repository.FindWatchedContract("x123")
			Expect(watchedContract).ToNot(BeNil())
			Expect(watchedContract.Transactions).To(BeEmpty())

		})

		It("returns transactions 'To' a watched contract", func() {
			block := core.Block{
				Number: 123,
				Transactions: []core.Transaction{
					{Hash: "TRANSACTION1", To: "x123"},
					{Hash: "TRANSACTION2", To: "x345"},
					{Hash: "TRANSACTION3", To: "x123"},
				},
			}
			repository.CreateBlock(block)

			repository.CreateWatchedContract(core.WatchedContract{Hash: "x123"})
			watchedContract := repository.FindWatchedContract("x123")
			Expect(watchedContract).ToNot(BeNil())
			Expect(watchedContract.Transactions).To(
				Equal([]core.Transaction{
					{Hash: "TRANSACTION1", To: "x123"},
					{Hash: "TRANSACTION3", To: "x123"},
				}))
		})
	})

}