package localbitcoins

import (
	"errors"
	"log"
	"sync"

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

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

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

// UpdateTicker updates and returns the ticker for a currency pair
func (l *LocalBitcoins) UpdateTicker(p pair.CurrencyPair, assetType string) (ticker.Price, error) {
	var tickerPrice ticker.Price
	tick, err := l.GetTicker()
	if err != nil {
		return tickerPrice, err
	}

	for _, x := range l.GetEnabledCurrencies() {
		currency := x.SecondCurrency.String()
		var tp ticker.Price
		tp.Pair = x
		tp.Last = tick[currency].Avg24h
		tp.Volume = tick[currency].VolumeBTC
		ticker.ProcessTicker(l.GetName(), x, tp, assetType)
	}

	return ticker.GetTicker(l.GetName(), p, assetType)
}

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

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

// UpdateOrderbook updates and returns the orderbook for a currency pair
func (l *LocalBitcoins) UpdateOrderbook(p pair.CurrencyPair, assetType string) (orderbook.Base, error) {
	var orderBook orderbook.Base
	orderbookNew, err := l.GetOrderbook(p.GetSecondCurrency().String())
	if err != nil {
		return orderBook, err
	}

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

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

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

// GetExchangeAccountInfo retrieves balances for all enabled currencies for the
// LocalBitcoins exchange
func (l *LocalBitcoins) GetExchangeAccountInfo() (exchange.AccountInfo, error) {
	var response exchange.AccountInfo
	response.ExchangeName = l.GetName()
	accountBalance, err := l.GetWalletBalance()
	if err != nil {
		return response, err
	}
	var exchangeCurrency exchange.AccountCurrencyInfo
	exchangeCurrency.CurrencyName = "BTC"
	exchangeCurrency.TotalValue = accountBalance.Total.Balance

	response.Currencies = append(response.Currencies, exchangeCurrency)
	return response, nil
}

// GetExchangeFundTransferHistory returns funding history, deposits and
// withdrawals
func (l *LocalBitcoins) 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 (l *LocalBitcoins) 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 (l *LocalBitcoins) 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 (l *LocalBitcoins) 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 (l *LocalBitcoins) CancelExchangeOrder(orderID int64) error {
	return errors.New("not yet implemented")
}

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

// GetExchangeOrderInfo returns information on a current open order
func (l *LocalBitcoins) 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 (l *LocalBitcoins) GetExchangeDepositAddress(cryptocurrency pair.CurrencyItem) (string, error) {
	return "", errors.New("not yet implemented")
}

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