package livenote

import (
	"context"

	"github.com/sirupsen/logrus"

	"github.com/c9s/bbgo/pkg/bbgo"
	"github.com/c9s/bbgo/pkg/fixedpoint"
	"github.com/c9s/bbgo/pkg/types"
)

// ID is the unique strategy ID, it needs to be in all lower case
// For example, grid strategy uses "grid"
const ID = "livenote"

// log is a logrus.Entry that will be reused.
// This line attaches the strategy field to the logger with our ID, so that the logs from this strategy will be tagged with our ID
var log = logrus.WithField("strategy", ID)

var ten = fixedpoint.NewFromInt(10)

// init is a special function of golang, it will be called when the program is started
// importing this package will trigger the init function call.
func init() {
	// Register our struct type to BBGO
	// Note that you don't need to field the fields.
	// BBGO uses reflect to parse your type information.
	bbgo.RegisterStrategy(ID, &Strategy{})
}

// Strategy is a struct that contains the settings of your strategy.
// These settings will be loaded from the BBGO YAML config file "bbgo.yaml" automatically.
type Strategy struct {
	Symbol string `json:"symbol"`
}

func (s *Strategy) ID() string {
	return ID
}

func (s *Strategy) InstanceID() string {
	return ID + "-" + s.Symbol
}

func (s *Strategy) Subscribe(session *bbgo.ExchangeSession) {
	session.Subscribe(types.KLineChannel, s.Symbol, types.SubscribeOptions{Interval: "1m"})
}

// This strategy simply spent all available quote currency to buy the symbol whenever kline gets closed
func (s *Strategy) Run(ctx context.Context, orderExecutor bbgo.OrderExecutor, session *bbgo.ExchangeSession) error {
	callback := func(k types.KLine) {
		log.Info(k)
		bbgo.PostLiveNote(&k)
	}

	// register our kline event handler
	session.MarketDataStream.OnKLine(callback)
	session.MarketDataStream.OnKLineClosed(callback)

	// if you need to do something when the user data stream is ready
	// note that you only receive order update, trade update, balance update when the user data stream is connect.
	session.UserDataStream.OnStart(func() {
		log.Infof("connected")
	})

	return nil
}