package client

import "tickserver/framework/event"
import "sync"
import "errors"
import "time"
import "strings"
import "io"
import "log"
import "math"
import "compress/gzip"
import "encoding/binary"
import "os"
import "fmt"

const (
	LmaxPrefix      = "lmax_"
	OandaPrefix     = "oanda_"
	EasyForexPrefix = "easyforex_"
	CtpPrefix       = "ctp_"
	FixPrefix       = "fix_"
	DzhPrefix       = "dzh_"
	SaxoPrefix      = "saxo_"
)

// 周期定义
const (
	TK  = 0
	S1  = 1
	S2  = 2
	S3  = 3
	S4  = 4
	S5  = 5
	S15 = 15
	S30 = 30
	M1  = 1 * 60
	M2  = 2 * 60
	M3  = 3 * 60
	M4  = 4 * 60
	M5  = 5 * 60
	M15 = 15 * 60
	M30 = 30 * 60
	H1  = 60 * 60
	H2  = 2 * 60 * 60
	H4  = 4 * 60 * 60
	D1  = 24 * 3600
	W1  = 7 * 24 * 3600
	MN1 = 30 * 24 * 3600
)

var PeriodNameMap = map[int]string{
	TK:  "Tick",
	S1:  "S1",
	S2:  "S2",
	S3:  "S3",
	S4:  "S4",
	S5:  "S5",
	S15: "S15",
	S30: "S30",
	M1:  "M1",
	M2:  "M2",
	M3:  "M3",
	M4:  "M4",
	M5:  "M5",
	M15: "M15",
	M30: "M30",
	H1:  "H1",
	H2:  "H2",
	H4:  "H4",
	D1:  "D1",
	W1:  "W1",
	MN1: "MN1",
}

var ErrNotEnough = errors.New("Not enough data")
var TimeNow = int64(-1)

type PP [2]float64 // [0]为价格, [1]为数量

// 实时行情数据
type Market struct {
	InsId     string  `json:"insId"`     // 产品ID
	Timestamp int64   `json:"ts"`        // 时间戳
	Close     float64 `json:"close"`     // 昨日收盘价
	Open      float64 `json:"open"`      // 今日开盘价
	High      float64 `json:"high"`      // 当日最高价
	Low       float64 `json:"low"`       // 当日最低价
	AllVolume float64 `json:"allVolume"` // 当日成交量
	AllAmount float64 `json:"allAmount"` // 成交额
	LastPrice float64 `json:"last"`      // 最新价
	Volume    float64 `json:"volume"`    // 本次成交量(增量)
	Bids      []PP    `json:"bids"`      // 申买
	Asks      []PP    `json:"asks"`      // 申卖
	ins       *Instrument
}

type Instrument struct {
	Id          string  `json:"insId"`    // ID = 前缀+原始ID
	Name        string  `json:"name"`     // 名称
	Typ         string  `json:"type"`     // 用来区分种类
	ExId        string  `json:"exid"`     // 交易所ID
	PriceInc    float64 `json:"priceInc"` // 最小加价
	Margin      float64 `json:"margin"`   // 保证金
	StartTime   int64   `json:"st"`       // 上市时间
	EndTime     int64   `json:"et"`       // 下市时间
	mu          sync.Mutex
	mk          *Market
	mkPublisher event.EventPublisher // mk数据事件
}

func (ins *Instrument) OnMarket() *event.Event {
     return ins.mkPublisher.Event()
}

func (ins *Instrument) SetMk(mk *Market) {
	ins.mu.Lock()
	ins.mk = mk
	ins.mu.Unlock()
	mk.SetIns(ins)
	ins.mkPublisher.Publish(mk) //异步
}

func (ins *Instrument) GetMk() *Market {
	ins.mu.Lock()
	if ins.mk == nil {
		ins.mk = &Market{
			ins:   ins,
			InsId: ins.Id,
		}
	}
	mk := *ins.mk
	ins.mu.Unlock()
	return &mk
}

func (ins *Instrument) FmtPrice(f float64) string {
	if f == math.MaxFloat64 || math.IsInf(f, 0) || math.IsNaN(f) {
		return "-"
	}
	pt := ins.PriceInc
	if pt < 0.0000001 {
		return fmt.Sprintf("%.8f", f)
	} else if pt < 0.000001 {
		return fmt.Sprintf("%.7f", f)
	} else if pt < 0.00001 {
		return fmt.Sprintf("%.6f", f)
	} else if pt < 0.0001 {
		return fmt.Sprintf("%.5f", f)
	} else if pt < 0.001 {
		return fmt.Sprintf("%.4f", f)
	} else if pt < 0.01 {
		return fmt.Sprintf("%.3f", f)
	} else if pt < 0.1 {
		return fmt.Sprintf("%.2f", f)
	} else if pt < 1. {
		return fmt.Sprintf("%.1f", f)
	} else {
		return fmt.Sprintf("%d", int(f))
	}
}

type DBConf struct {
	DBDriver string // mysql, sqlite
	DSN      string // dsn = fmt.Sprintf("root:fzm@1001@/%s?charset=%s", dbName, "utf8")
	DBName   string // fzmdb
}

// 历史数据应答参数
type HistoryReply struct {
	Url string `json:"url"`
	St  int64  `json:"st"`
	Et  int64  `json:"et"`
	N   int    `json:"n"`
}

type Tick struct {
	// InsId     string  `json:"insId"`  // 产品ID
	Timestamp int64   `json:"ts"`     // 时间戳
	Price     float64 `json:"last"`   // 最新价
	Volume    float64 `json:"volume"` // 本次成交量(增量)
	Bid       PP      `json:"bids"`   // 申买
	Ask       PP      `json:"asks"`   // 申卖
}

type Candle struct {
	Timestamp  int64   `json:"ts"`
	Open       float64 `json:"open"`
	High       float64 `json:"high"`
	Low        float64 `json:"low"`
	Close      float64 `json:"close"`
	RealVolums float64 `json:"realVol"`
	TickVolums float64 `json:"tickVol"`
}

// 实时数据订阅参数
type SubArgs struct {
	InsId    string `json:"insId"`  // 产品Id
	Code     int64  `json:"code"`   // 客户端代码
	IsCancel bool   `json:"cancel"` // 是否取消订阅
}


func InsIdPrefix(insId string) string {
	return strings.Split(insId, "_")[0]
}

func getTime(ts int64) time.Time {
	if ts < 0 {
		return time.Now()
	}
	return time.Unix(ts/1000, (ts%1000)*1e6)
}

func GetTime(ts int64) time.Time {
	return getTime(ts)
}

func DebugDelay(prefix, insId string, ts int64) {
	// for debug delay
	now := time.Now()
	d := int64(float64(now.UnixNano())*1e-6) - ts
	if d > 1000 {
		log.Println(prefix, "delay > 1000ms", insId, d, getTime(ts))
	}
}

func (m *Market) SetIns(ins *Instrument) {
	m.ins = ins
}

func UnzipC(r io.Reader) ([]Candle, error) {
	return unzipC(r)
}

func unzipC(r io.Reader) ([]Candle, error) {
	gr, err := gzip.NewReader(r)
	if err != nil {
		return nil, err
	}
	defer gr.Close()
	candles := []Candle{}
	for {
		c, err := ReadCandleBinary(gr)
		if err != nil {
			if err != io.EOF {
				return candles, err
			}
			break
		}
		if math.IsNaN(c.Open*2) || math.IsInf(c.Open*2, 0) {
			continue
		}
		if math.IsNaN(c.High*2) || math.IsInf(c.High*2, 0) {
			continue
		}
		if math.IsNaN(c.Low*2) || math.IsInf(c.Low*2, 0) {
			continue
		}
		if math.IsNaN(c.Close*2) || math.IsInf(c.Close*2, 0) {
			continue
		}
		candles = append(candles, *c)
	}
	return candles, nil
}

func UnzipT(r io.Reader) ([]Tick, error) {
	return unzipT(r)
}

func unzipT(r io.Reader) ([]Tick, error) {
	gr, err := gzip.NewReader(r)
	if err != nil {
		return nil, err
	}
	defer gr.Close()
	ticks := []Tick{}
	for {
		t, err := ReadTickBinary(gr)
		if err != nil {
			if err != io.EOF {
				return nil, err
			}
			break
		}
		if math.IsNaN(t.Price) || math.IsInf(t.Price*2, 0) {
			continue
		}
		ticks = append(ticks, *t)
	}
	return ticks, nil
}

func readTickFile(fname string) ([]Tick, error) {
	f, err := os.Open(fname)
	if err != nil {
		// log.Fatal(err.Error() + fname)
		return nil, err
	}
	defer f.Close()
	return unzipT(f)
}

func readCandleFile(fname string) ([]Candle, error) {
	f, err := os.Open(fname)
	if err != nil {
		return nil, err
	}
	defer f.Close()
	return unzipC(f)
}

func ReadCandleFile(fname string) ([]Candle, error) {
	return readCandleFile(fname)
}

func ReadTickFile(fname string) ([]Tick, error) {
	return readTickFile(fname)
}

func ReadTickBinary(r io.Reader) (*Tick, error) {
	t := &Tick{}
	err := binary.Read(r, binary.LittleEndian, t)
	if err != nil {
		return nil, err
	}
	return t, nil
}

func ReadCandleBinary(r io.Reader) (*Candle, error) {
	c := &Candle{}
	err := binary.Read(r, binary.LittleEndian, c)
	if err != nil {
		return nil, err
	}
	return c, nil
}