package bitflyer

import (
	"errors"
	"log"
	"sync"

	"github.com/thrasher-/gocryptotrader/common"
	"github.com/thrasher-/gocryptotrader/currency/pair"
	exchange "github.com/thrasher-/gocryptotrader/exchanges"
	"github.com/thrasher-/gocryptotrader/exchanges/orderbook"
	"github.com/thrasher-/gocryptotrader/exchanges/ticker"
)

// Start starts the Bitflyer go routine
func (b *Bitflyer) Start(wg *sync.WaitGroup) {
	wg.Add(1)
	go func() {
		b.Run()
		wg.Done()
	}()
}

// Run implements the Bitflyer wrapper
func (b *Bitflyer) Run() {
	if b.Verbose {
		log.Printf("%s Websocket: %s.", b.GetName(), common.IsEnabled(b.Websocket))
		log.Printf("%s polling delay: %ds.\n", b.GetName(), b.RESTPollingDelay)
		log.Printf("%s %d currencies enabled: %s.\n", b.GetName(), len(b.EnabledPairs), b.EnabledPairs)
	}

	/*
		marketInfo, err := b.GetMarkets()
		if err != nil {
			log.Printf("%s Failed to get available symbols.\n", b.GetName())
		} else {
			var exchangeProducts []string

			for _, info := range marketInfo {
				exchangeProducts = append(exchangeProducts, info.ProductCode)
			}

			err = b.UpdateAvailableCurrencies(exchangeProducts, false)
			if err != nil {
				log.Printf("%s Failed to get config.\n", b.GetName())
			}
		}
	*/
}

// UpdateTicker updates and returns the ticker for a currency pair
func (b *Bitflyer) UpdateTicker(p pair.CurrencyPair, assetType string) (ticker.Price, error) {
	var tickerPrice ticker.Price

	p = b.CheckFXString(p)

	tickerNew, err := b.GetTicker(p.Pair().String())
	if err != nil {
		return tickerPrice, err
	}

	tickerPrice.Pair = p
	tickerPrice.Ask = tickerNew.BestAsk
	tickerPrice.Bid = tickerNew.BestBid
	// tickerPrice.Low
	tickerPrice.Last = tickerNew.Last
	tickerPrice.Volume = tickerNew.Volume
	// tickerPrice.High
	ticker.ProcessTicker(b.GetName(), p, tickerPrice, assetType)
	return ticker.GetTicker(b.Name, p, assetType)
}

// GetTickerPrice returns the ticker for a currency pair
func (b *Bitflyer) GetTickerPrice(p pair.CurrencyPair, assetType string) (ticker.Price, error) {
	tick, err := ticker.GetTicker(b.GetName(), p, ticker.Spot)
	if err != nil {
		return b.UpdateTicker(p, assetType)
	}
	return tick, nil
}

// CheckFXString upgrades currency pair if needed
func (b *Bitflyer) CheckFXString(p pair.CurrencyPair) pair.CurrencyPair {
	if common.StringContains(p.GetFirstCurrency().String(), "FX") {
		p.FirstCurrency = "FX_BTC"
		return p
	}
	return p
}

// GetOrderbookEx returns the orderbook for a currency pair
func (b *Bitflyer) GetOrderbookEx(p pair.CurrencyPair, assetType string) (orderbook.Base, error) {
	ob, err := orderbook.GetOrderbook(b.GetName(), p, assetType)
	if err != nil {
		return b.UpdateOrderbook(p, assetType)
	}
	return ob, nil
}

// UpdateOrderbook updates and returns the orderbook for a currency pair
func (b *Bitflyer) UpdateOrderbook(p pair.CurrencyPair, assetType string) (orderbook.Base, error) {
	var orderBook orderbook.Base

	p = b.CheckFXString(p)

	orderbookNew, err := b.GetOrderBook(p.Pair().String())
	if err != nil {
		return orderBook, err
	}

	for x := range orderbookNew.Asks {
		orderBook.Asks = append(orderBook.Asks, orderbook.Item{Price: orderbookNew.Asks[x].Price, Amount: orderbookNew.Asks[x].Size})
	}

	for x := range orderbookNew.Bids {
		orderBook.Bids = append(orderBook.Bids, orderbook.Item{Price: orderbookNew.Bids[x].Price, Amount: orderbookNew.Bids[x].Size})
	}

	orderbook.ProcessOrderbook(b.GetName(), p, orderBook, assetType)
	return orderbook.GetOrderbook(b.Name, p, assetType)
}

// GetExchangeAccountInfo retrieves balances for all enabled currencies on the
// Bitflyer exchange
func (b *Bitflyer) GetExchangeAccountInfo() (exchange.AccountInfo, error) {
	var response exchange.AccountInfo
	response.ExchangeName = b.GetName()
	// accountBalance, err := b.GetAccountBalance()
	// if err != nil {
	// 	return response, err
	// }
	if !b.Enabled {
		return response, errors.New("exchange not enabled")
	}

	// implement once authenticated requests are introduced

	return response, nil
}

// GetExchangeFundTransferHistory returns funding history, deposits and
// withdrawals
func (b *Bitflyer) GetExchangeFundTransferHistory() ([]exchange.FundHistory, error) {
	var fundHistory []exchange.FundHistory
	return fundHistory, errors.New("not supported on exchange")
}

// GetExchangeHistory returns historic trade data since exchange opening.
func (b *Bitflyer) GetExchangeHistory(p pair.CurrencyPair, assetType string) ([]exchange.TradeHistory, error) {
	var resp []exchange.TradeHistory

	return resp, errors.New("trade history not yet implemented")
}

// SubmitExchangeOrder submits a new order
func (b *Bitflyer) SubmitExchangeOrder(p pair.CurrencyPair, side exchange.OrderSide, orderType exchange.OrderType, amount, price float64, clientID string) (int64, error) {
	return 0, errors.New("not yet implemented")
}

// ModifyExchangeOrder will allow of changing orderbook placement and limit to
// market conversion
func (b *Bitflyer) ModifyExchangeOrder(orderID int64, action exchange.ModifyOrder) (int64, error) {
	return 0, errors.New("not yet implemented")
}

// CancelExchangeOrder cancels an order by its corresponding ID number
func (b *Bitflyer) CancelExchangeOrder(orderID int64) error {
	return errors.New("not yet implemented")
}

// CancelAllExchangeOrders cancels all orders associated with a currency pair
func (b *Bitflyer) CancelAllExchangeOrders() error {
	return errors.New("not yet implemented")
}

// GetExchangeOrderInfo returns information on a current open order
func (b *Bitflyer) GetExchangeOrderInfo(orderID int64) (exchange.OrderDetail, error) {
	var orderDetail exchange.OrderDetail
	return orderDetail, errors.New("not yet implemented")
}

// GetExchangeDepositAddress returns a deposit address for a specified currency
func (b *Bitflyer) GetExchangeDepositAddress(cryptocurrency pair.CurrencyItem) (string, error) {
	return "", errors.New("not yet implemented")
}

// WithdrawCryptoExchangeFunds returns a withdrawal ID when a withdrawal is
// submitted
func (b *Bitflyer) WithdrawCryptoExchangeFunds(address string, cryptocurrency pair.CurrencyItem, amount float64) (string, error) {
	return "", errors.New("not yet implemented")
}

// WithdrawFiatExchangeFunds returns a withdrawal ID when a
// withdrawal is submitted
func (b *Bitflyer) WithdrawFiatExchangeFunds(currency pair.CurrencyItem, amount float64) (string, error) {
	return "", errors.New("not yet implemented")
}

// WithdrawFiatExchangeFundsToInternationalBank returns a withdrawal ID when a
// withdrawal is submitted
func (b *Bitflyer) WithdrawFiatExchangeFundsToInternationalBank(currency pair.CurrencyItem, amount float64) (string, error) {
	return "", errors.New("not yet implemented")
}