package huobi

import (
	"crypto/ecdsa"
	"crypto/rand"
	"crypto/x509"
	"encoding/pem"
	"io/ioutil"
	"log"
	"os"
	"strconv"
	"strings"
	"testing"

	"github.com/gorilla/websocket"
	"github.com/thrasher-corp/gocryptotrader/common"
	"github.com/thrasher-corp/gocryptotrader/common/crypto"
	"github.com/thrasher-corp/gocryptotrader/config"
	"github.com/thrasher-corp/gocryptotrader/currency"
	exchange "github.com/thrasher-corp/gocryptotrader/exchanges"
	"github.com/thrasher-corp/gocryptotrader/exchanges/order"
	"github.com/thrasher-corp/gocryptotrader/exchanges/sharedtestvalues"
	"github.com/thrasher-corp/gocryptotrader/exchanges/websocket/wshandler"
	"github.com/thrasher-corp/gocryptotrader/exchanges/withdraw"
)

// Please supply you own test keys here for due diligence testing.
const (
	apiKey                  = ""
	apiSecret               = ""
	canManipulateRealOrders = false
	testSymbol              = "btcusdt"
)

var h HUOBI
var wsSetupRan bool

func TestMain(m *testing.M) {
	h.SetDefaults()
	cfg := config.GetConfig()
	err := cfg.LoadConfig("../../testdata/configtest.json", true)
	if err != nil {
		log.Fatal("Huobi load config error", err)
	}
	hConfig, err := cfg.GetExchangeConfig("Huobi")
	if err != nil {
		log.Fatal("Huobi Setup() init error")
	}
	hConfig.API.AuthenticatedSupport = true
	hConfig.API.AuthenticatedWebsocketSupport = true
	hConfig.API.Credentials.Key = apiKey
	hConfig.API.Credentials.Secret = apiSecret

	err = h.Setup(hConfig)
	if err != nil {
		log.Fatal("Huobi setup error", err)
	}

	os.Exit(m.Run())
}

func setupWsTests(t *testing.T) {
	if wsSetupRan {
		return
	}
	if !h.Websocket.IsEnabled() && !h.API.AuthenticatedWebsocketSupport || !areTestAPIKeysSet() {
		t.Skip(wshandler.WebsocketNotEnabled)
	}
	comms = make(chan WsMessage, sharedtestvalues.WebsocketChannelOverrideCapacity)
	h.Websocket.DataHandler = sharedtestvalues.GetWebsocketInterfaceChannelOverride()
	h.Websocket.TrafficAlert = sharedtestvalues.GetWebsocketStructChannelOverride()
	go h.WsHandleData()
	h.AuthenticatedWebsocketConn = &wshandler.WebsocketConnection{
		ExchangeName:         h.Name,
		URL:                  wsAccountsOrdersURL,
		Verbose:              h.Verbose,
		ResponseMaxLimit:     exchange.DefaultWebsocketResponseMaxLimit,
		ResponseCheckTimeout: exchange.DefaultWebsocketResponseCheckTimeout,
	}
	h.WebsocketConn = &wshandler.WebsocketConnection{
		ExchangeName:         h.Name,
		URL:                  wsMarketURL,
		Verbose:              h.Verbose,
		ResponseMaxLimit:     exchange.DefaultWebsocketResponseMaxLimit,
		ResponseCheckTimeout: exchange.DefaultWebsocketResponseCheckTimeout,
	}
	var dialer websocket.Dialer
	err := h.wsAuthenticatedDial(&dialer)
	if err != nil {
		t.Fatal(err)
	}
	err = h.wsLogin()
	if err != nil {
		t.Fatal(err)
	}

	wsSetupRan = true
}

func TestGetSpotKline(t *testing.T) {
	t.Parallel()
	_, err := h.GetSpotKline(KlinesRequestParams{
		Symbol: testSymbol,
		Period: TimeIntervalHour,
		Size:   0,
	})
	if err != nil {
		t.Errorf("Huobi TestGetSpotKline: %s", err)
	}
}

func TestGetMarketDetailMerged(t *testing.T) {
	t.Parallel()
	_, err := h.GetMarketDetailMerged(testSymbol)
	if err != nil {
		t.Errorf("Huobi TestGetMarketDetailMerged: %s", err)
	}
}

func TestGetDepth(t *testing.T) {
	t.Parallel()
	_, err := h.GetDepth(OrderBookDataRequestParams{
		Symbol: testSymbol,
		Type:   OrderBookDataRequestParamsTypeStep1,
	})

	if err != nil {
		t.Errorf("Huobi TestGetDepth: %s", err)
	}
}

func TestGetTrades(t *testing.T) {
	t.Parallel()
	_, err := h.GetTrades(testSymbol)
	if err != nil {
		t.Errorf("Huobi TestGetTrades: %s", err)
	}
}

func TestGetLatestSpotPrice(t *testing.T) {
	t.Parallel()
	_, err := h.GetLatestSpotPrice(testSymbol)
	if err != nil {
		t.Errorf("Huobi GetLatestSpotPrice: %s", err)
	}
}

func TestGetTradeHistory(t *testing.T) {
	t.Parallel()
	_, err := h.GetTradeHistory(testSymbol, "50")
	if err != nil {
		t.Errorf("Huobi TestGetTradeHistory: %s", err)
	}
}

func TestGetMarketDetail(t *testing.T) {
	t.Parallel()
	_, err := h.GetMarketDetail(testSymbol)
	if err != nil {
		t.Errorf("Huobi TestGetTradeHistory: %s", err)
	}
}

func TestGetSymbols(t *testing.T) {
	t.Parallel()
	_, err := h.GetSymbols()
	if err != nil {
		t.Errorf("Huobi TestGetSymbols: %s", err)
	}
}

func TestGetCurrencies(t *testing.T) {
	t.Parallel()
	_, err := h.GetCurrencies()
	if err != nil {
		t.Errorf("Huobi TestGetCurrencies: %s", err)
	}
}

func TestGetTicker(t *testing.T) {
	_, err := h.GetTickers()
	if err != nil {
		t.Error(err)
	}
}

func TestGetTimestamp(t *testing.T) {
	t.Parallel()
	_, err := h.GetTimestamp()
	if err != nil {
		t.Errorf("Huobi TestGetTimestamp: %s", err)
	}
}

func TestGetAccounts(t *testing.T) {
	t.Parallel()
	if !h.ValidateAPICredentials() || !canManipulateRealOrders {
		t.Skip()
	}

	_, err := h.GetAccounts()
	if err != nil {
		t.Errorf("Huobi GetAccounts: %s", err)
	}
}

func TestGetAccountBalance(t *testing.T) {
	t.Parallel()
	if !h.ValidateAPICredentials() || !canManipulateRealOrders {
		t.Skip()
	}

	result, err := h.GetAccounts()
	if err != nil {
		t.Errorf("Huobi GetAccounts: %s", err)
	}

	userID := strconv.FormatInt(result[0].ID, 10)
	_, err = h.GetAccountBalance(userID)
	if err != nil {
		t.Errorf("Huobi GetAccountBalance: %s", err)
	}
}

func TestGetAggregatedBalance(t *testing.T) {
	t.Parallel()
	if !h.ValidateAPICredentials() {
		t.Skip()
	}

	_, err := h.GetAggregatedBalance()
	if err != nil {
		t.Errorf("Huobi GetAggregatedBalance: %s", err)
	}
}

func TestSpotNewOrder(t *testing.T) {
	t.Parallel()
	if !h.ValidateAPICredentials() || !canManipulateRealOrders {
		t.Skip()
	}

	arg := SpotNewOrderRequestParams{
		Symbol:    testSymbol,
		AccountID: 1,
		Amount:    0.01,
		Price:     10.1,
		Type:      SpotNewOrderRequestTypeBuyLimit,
	}

	_, err := h.SpotNewOrder(arg)
	if err != nil {
		t.Errorf("Huobi SpotNewOrder: %s", err)
	}
}

func TestCancelExistingOrder(t *testing.T) {
	t.Parallel()
	if !h.ValidateAPICredentials() || !canManipulateRealOrders {
		t.Skip()
	}
	_, err := h.CancelExistingOrder(1337)
	if err == nil {
		t.Error("Huobi TestCancelExistingOrder Expected error")
	}
}

func TestGetOrder(t *testing.T) {
	t.Parallel()
	if !h.ValidateAPICredentials() || !canManipulateRealOrders {
		t.Skip()
	}
	_, err := h.GetOrder(1337)
	if err != nil {
		t.Error(err)
	}
}

func TestGetMarginLoanOrders(t *testing.T) {
	t.Parallel()
	if !h.ValidateAPICredentials() {
		t.Skip()
	}

	_, err := h.GetMarginLoanOrders(testSymbol, "", "", "", "", "", "", "")
	if err != nil {
		t.Errorf("Huobi TestGetMarginLoanOrders: %s", err)
	}
}

func TestGetMarginAccountBalance(t *testing.T) {
	t.Parallel()
	if !h.ValidateAPICredentials() {
		t.Skip()
	}

	_, err := h.GetMarginAccountBalance(testSymbol)
	if err != nil {
		t.Errorf("Huobi TestGetMarginAccountBalance: %s", err)
	}
}

func TestCancelWithdraw(t *testing.T) {
	t.Parallel()
	if !h.ValidateAPICredentials() || !canManipulateRealOrders {
		t.Skip()
	}
	_, err := h.CancelWithdraw(1337)
	if err == nil {
		t.Error("Huobi TestCancelWithdraw Expected error")
	}
}

func TestPEMLoadAndSign(t *testing.T) {
	t.Parallel()
	pemKey := strings.NewReader(h.API.Credentials.PEMKey)
	pemBytes, err := ioutil.ReadAll(pemKey)
	if err != nil {
		t.Fatalf("TestPEMLoadAndSign Unable to ioutil.ReadAll PEM key: %s", err)
	}

	block, _ := pem.Decode(pemBytes)
	if block == nil {
		t.Fatalf("TestPEMLoadAndSign Block is nil")
	}

	x509Encoded := block.Bytes
	privKey, err := x509.ParseECPrivateKey(x509Encoded)
	if err != nil {
		t.Fatalf("TestPEMLoadAndSign Unable to ParseECPrivKey: %s", err)
	}

	_, _, err = ecdsa.Sign(rand.Reader, privKey, crypto.GetSHA256([]byte("test")))
	if err != nil {
		t.Fatalf("TestPEMLoadAndSign Unable to sign: %s", err)
	}
}

func setFeeBuilder() *exchange.FeeBuilder {
	return &exchange.FeeBuilder{
		Amount:  1,
		FeeType: exchange.CryptocurrencyTradeFee,
		Pair: currency.NewPairWithDelimiter(currency.BTC.String(),
			currency.LTC.String(),
			"_"),
		PurchasePrice:       1,
		FiatCurrency:        currency.USD,
		BankTransactionType: exchange.WireTransfer,
	}
}

// TestGetFeeByTypeOfflineTradeFee logic test
func TestGetFeeByTypeOfflineTradeFee(t *testing.T) {
	var feeBuilder = setFeeBuilder()
	h.GetFeeByType(feeBuilder)
	if !areTestAPIKeysSet() {
		if feeBuilder.FeeType != exchange.OfflineTradeFee {
			t.Errorf("Expected %v, received %v", exchange.OfflineTradeFee, feeBuilder.FeeType)
		}
	} else {
		if feeBuilder.FeeType != exchange.CryptocurrencyTradeFee {
			t.Errorf("Expected %v, received %v", exchange.CryptocurrencyTradeFee, feeBuilder.FeeType)
		}
	}
}

func TestGetFee(t *testing.T) {
	t.Parallel()
	var feeBuilder = setFeeBuilder()
	// CryptocurrencyTradeFee Basic
	if resp, err := h.GetFee(feeBuilder); resp != float64(0.002) || err != nil {
		t.Error(err)
		t.Errorf("GetFee() error. Expected: %f, Received: %f", float64(0.002), resp)
	}

	// CryptocurrencyTradeFee High quantity
	feeBuilder = setFeeBuilder()
	feeBuilder.Amount = 1000
	feeBuilder.PurchasePrice = 1000
	if resp, err := h.GetFee(feeBuilder); resp != float64(2000) || err != nil {
		t.Errorf("GetFee() error. Expected: %f, Received: %f", float64(2000), resp)
		t.Error(err)
	}

	// CryptocurrencyTradeFee IsMaker
	feeBuilder = setFeeBuilder()
	feeBuilder.IsMaker = true
	if resp, err := h.GetFee(feeBuilder); resp != float64(0.002) || err != nil {
		t.Errorf("GetFee() error. Expected: %f, Received: %f", float64(0.002), resp)
		t.Error(err)
	}

	// CryptocurrencyTradeFee Negative purchase price
	feeBuilder = setFeeBuilder()
	feeBuilder.PurchasePrice = -1000
	if resp, err := h.GetFee(feeBuilder); resp != float64(0) || err != nil {
		t.Errorf("GetFee() error. Expected: %f, Received: %f", float64(0), resp)
		t.Error(err)
	}
	// CryptocurrencyWithdrawalFee Basic
	feeBuilder = setFeeBuilder()
	feeBuilder.FeeType = exchange.CryptocurrencyWithdrawalFee
	if resp, err := h.GetFee(feeBuilder); resp != float64(0) || err != nil {
		t.Errorf("GetFee() error. Expected: %f, Received: %f", float64(0), resp)
		t.Error(err)
	}

	// CryptocurrencyWithdrawalFee Invalid currency
	feeBuilder = setFeeBuilder()
	feeBuilder.Pair.Base = currency.NewCode("hello")
	feeBuilder.FeeType = exchange.CryptocurrencyWithdrawalFee
	if resp, err := h.GetFee(feeBuilder); resp != float64(0) || err != nil {
		t.Errorf("GetFee() error. Expected: %f, Received: %f", float64(0), resp)
		t.Error(err)
	}

	// CyptocurrencyDepositFee Basic
	feeBuilder = setFeeBuilder()
	feeBuilder.FeeType = exchange.CyptocurrencyDepositFee
	if resp, err := h.GetFee(feeBuilder); resp != float64(0) || err != nil {
		t.Errorf("GetFee() error. Expected: %f, Received: %f", float64(0), resp)
		t.Error(err)
	}

	// InternationalBankDepositFee Basic
	feeBuilder = setFeeBuilder()
	feeBuilder.FeeType = exchange.InternationalBankDepositFee
	if resp, err := h.GetFee(feeBuilder); resp != float64(0) || err != nil {
		t.Errorf("GetFee() error. Expected: %f, Received: %f", float64(0), resp)
		t.Error(err)
	}

	// InternationalBankWithdrawalFee Basic
	feeBuilder = setFeeBuilder()
	feeBuilder.FeeType = exchange.InternationalBankWithdrawalFee
	feeBuilder.FiatCurrency = currency.USD
	if resp, err := h.GetFee(feeBuilder); resp != float64(0) || err != nil {
		t.Errorf("GetFee() error. Expected: %f, Received: %f", float64(0), resp)
		t.Error(err)
	}
}

func TestFormatWithdrawPermissions(t *testing.T) {
	expectedResult := exchange.AutoWithdrawCryptoWithSetupText + " & " + exchange.NoFiatWithdrawalsText
	withdrawPermissions := h.FormatWithdrawPermissions()
	if withdrawPermissions != expectedResult {
		t.Errorf("Expected: %s, Received: %s", expectedResult, withdrawPermissions)
	}
}

func TestGetActiveOrders(t *testing.T) {
	var getOrdersRequest = order.GetOrdersRequest{
		OrderType:  order.AnyType,
		Currencies: []currency.Pair{currency.NewPair(currency.BTC, currency.USDT)},
	}

	_, err := h.GetActiveOrders(&getOrdersRequest)
	if areTestAPIKeysSet() && err != nil {
		t.Errorf("Could not get open orders: %s", err)
	} else if !areTestAPIKeysSet() && err == nil {
		t.Error("Expecting an error when no keys are set")
	}
}

func TestGetOrderHistory(t *testing.T) {
	var getOrdersRequest = order.GetOrdersRequest{
		OrderType:  order.AnyType,
		Currencies: []currency.Pair{currency.NewPair(currency.BTC, currency.USDT)},
	}

	_, err := h.GetOrderHistory(&getOrdersRequest)
	if areTestAPIKeysSet() && err != nil {
		t.Errorf("Could not get order history: %s", err)
	} else if !areTestAPIKeysSet() && err == nil {
		t.Error("Expecting an error when no keys are set")
	}
}

// Any tests below this line have the ability to impact your orders on the exchange. Enable canManipulateRealOrders to run them
// ----------------------------------------------------------------------------------------------------------------------------
func areTestAPIKeysSet() bool {
	return h.ValidateAPICredentials()
}

func TestSubmitOrder(t *testing.T) {
	if !h.ValidateAPICredentials() {
		t.Skip()
	}

	if areTestAPIKeysSet() && !canManipulateRealOrders {
		t.Skip("API keys set, canManipulateRealOrders false, skipping test")
	}

	accounts, err := h.GetAccounts()
	if err != nil {
		t.Fatalf("Failed to get accounts. Err: %s", err)
	}

	var orderSubmission = &order.Submit{
		Pair: currency.Pair{
			Base:  currency.BTC,
			Quote: currency.USDT,
		},
		OrderSide: order.Buy,
		OrderType: order.Limit,
		Price:     1,
		Amount:    1,
		ClientID:  strconv.FormatInt(accounts[0].ID, 10),
	}
	response, err := h.SubmitOrder(orderSubmission)
	if areTestAPIKeysSet() && (err != nil || !response.IsOrderPlaced) {
		t.Errorf("Order failed to be placed: %v", err)
	}
}

func TestCancelExchangeOrder(t *testing.T) {
	if areTestAPIKeysSet() && !canManipulateRealOrders {
		t.Skip("API keys set, canManipulateRealOrders false, skipping test")
	}

	currencyPair := currency.NewPair(currency.LTC, currency.BTC)
	var orderCancellation = &order.Cancel{
		OrderID:       "1",
		WalletAddress: "1F5zVDgNjorJ51oGebSvNCrSAHpwGkUdDB",
		AccountID:     "1",
		CurrencyPair:  currencyPair,
	}

	err := h.CancelOrder(orderCancellation)

	if !areTestAPIKeysSet() && err == nil {
		t.Error("Expecting an error when no keys are set")
	}
	if areTestAPIKeysSet() && err != nil {
		t.Errorf("Could not cancel orders: %v", err)
	}
}

func TestCancelAllExchangeOrders(t *testing.T) {
	if areTestAPIKeysSet() && !canManipulateRealOrders {
		t.Skip("API keys set, canManipulateRealOrders false, skipping test")
	}

	currencyPair := currency.NewPair(currency.LTC, currency.BTC)
	var orderCancellation = order.Cancel{
		OrderID:       "1",
		WalletAddress: "1F5zVDgNjorJ51oGebSvNCrSAHpwGkUdDB",
		AccountID:     "1",
		CurrencyPair:  currencyPair,
	}

	resp, err := h.CancelAllOrders(&orderCancellation)

	if !areTestAPIKeysSet() && err == nil {
		t.Error("Expecting an error when no keys are set")
	}
	if areTestAPIKeysSet() && err != nil {
		t.Errorf("Could not cancel orders: %v", err)
	}

	if len(resp.Status) > 0 {
		t.Errorf("%v orders failed to cancel", len(resp.Status))
	}
}

func TestGetAccountInfo(t *testing.T) {
	if !areTestAPIKeysSet() {
		_, err := h.GetAccountInfo()
		if err == nil {
			t.Error("GetAccountInfo() Expected error")
		}
	} else {
		_, err := h.GetAccountInfo()
		if err != nil {
			t.Error("GetAccountInfo() error", err)
		}
	}
}

func TestModifyOrder(t *testing.T) {
	if areTestAPIKeysSet() && !canManipulateRealOrders {
		t.Skip("API keys set, canManipulateRealOrders false, skipping test")
	}
	_, err := h.ModifyOrder(&order.Modify{})
	if err == nil {
		t.Error("ModifyOrder() Expected error")
	}
}

func TestWithdraw(t *testing.T) {
	withdrawCryptoRequest := withdraw.CryptoRequest{
		GenericInfo: withdraw.GenericInfo{
			Amount:      -1,
			Currency:    currency.BTC,
			Description: "WITHDRAW IT ALL",
		},
		Address: "1F5zVDgNjorJ51oGebSvNCrSAHpwGkUdDB",
	}

	if areTestAPIKeysSet() && !canManipulateRealOrders {
		t.Skip("API keys set, canManipulateRealOrders false, skipping test")
	}

	_, err := h.WithdrawCryptocurrencyFunds(&withdrawCryptoRequest)
	if !areTestAPIKeysSet() && err == nil {
		t.Error("Expecting an error when no keys are set")
	}
	if areTestAPIKeysSet() && err != nil {
		t.Errorf("Withdraw failed to be placed: %v", err)
	}
}

func TestWithdrawFiat(t *testing.T) {
	if areTestAPIKeysSet() && !canManipulateRealOrders {
		t.Skip("API keys set, canManipulateRealOrders false, skipping test")
	}

	var withdrawFiatRequest = withdraw.FiatRequest{}
	_, err := h.WithdrawFiatFunds(&withdrawFiatRequest)
	if err != common.ErrFunctionNotSupported {
		t.Errorf("Expected '%v', received: '%v'", common.ErrFunctionNotSupported, err)
	}
}

func TestWithdrawInternationalBank(t *testing.T) {
	if areTestAPIKeysSet() && !canManipulateRealOrders {
		t.Skip("API keys set, canManipulateRealOrders false, skipping test")
	}

	var withdrawFiatRequest = withdraw.FiatRequest{}
	_, err := h.WithdrawFiatFundsToInternationalBank(&withdrawFiatRequest)
	if err != common.ErrFunctionNotSupported {
		t.Errorf("Expected '%v', received: '%v'", common.ErrFunctionNotSupported, err)
	}
}

func TestGetDepositAddress(t *testing.T) {
	_, err := h.GetDepositAddress(currency.BTC, "")
	if err == nil {
		t.Error("GetDepositAddress() error cannot be nil")
	}
}

// TestWsGetAccountsList connects to WS, logs in, gets account list
func TestWsGetAccountsList(t *testing.T) {
	setupWsTests(t)
	resp, err := h.wsGetAccountsList()
	if err != nil {
		t.Fatal(err)
	}
	if resp.ErrorCode > 0 {
		t.Error(resp.ErrorMessage)
	}
}

// TestWsGetOrderList connects to WS, logs in, gets order list
func TestWsGetOrderList(t *testing.T) {
	setupWsTests(t)
	resp, err := h.wsGetOrdersList(1, currency.NewPairFromString("ethbtc"))
	if err != nil {
		t.Fatal(err)
	}
	if resp.ErrorCode > 0 {
		t.Error(resp.ErrorMessage)
	}
}

// TestWsGetOrderDetails connects to WS, logs in, gets order details
func TestWsGetOrderDetails(t *testing.T) {
	setupWsTests(t)
	orderID := "123"
	resp, err := h.wsGetOrderDetails(orderID)
	if err != nil {
		t.Fatal(err)
	}
	if resp.ErrorCode > 0 && (orderID == "123" && resp.ErrorCode != 10022) {
		t.Error(resp.ErrorMessage)
	}
}