// main.go
package main

import (
	"flag"
	"fmt"
	"io"
	"log"
	"os"
	"sort"
	"time"

	"tickserver/server/market"
)

type byTime []market.Candle

func (a byTime) Len() int           { return len(a) }
func (a byTime) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }
func (a byTime) Less(i, j int) bool { return a[i].Timestamp < a[j].Timestamp }

func main() {
	flag.Parse()
	n := flag.NArg()
	if n != 2 {
		log.Println("must input current and next instrument id", n)
		return
	}
	insIdCurrent := flag.Arg(0)
	insIdNext := flag.Arg(1)
	log.Println("current:", insIdCurrent, "next", insIdNext)
	fnameCurrent := fmt.Sprintf("./fzmnew/ctp/%s/D1.gz", insIdCurrent)
	fnameNext := fmt.Sprintf("./fzmnew/ctp/%s/D1.gz", insIdNext)
	candlesCurrent, err := market.ReadCandleFile(fnameCurrent)
	if err != nil {
		log.Println(fnameCurrent, err)
		return
	}
	log.Println(fnameCurrent, len(candlesCurrent))
	candlesNext, err := market.ReadCandleFile(fnameNext)
	if err != nil {
		log.Println(fnameNext, err)
		return
	}
	log.Println(fnameNext, len(candlesNext))
	candlesNextMap := make(map[int64]market.Candle)
	for _, v := range candlesNext {
		candlesNextMap[v.Timestamp] = v
	}

	var candlesSelected []market.Candle
	var bCurrent bool
	for i := len(candlesCurrent) - 1; i >= 0; i-- {
		if fileExist(candlesCurrent[i].Timestamp) {
			break
		}

		candleNext, ok := candlesNextMap[candlesCurrent[i].Timestamp]
		if ok {
			if candlesCurrent[i].TickVolums >= candleNext.TickVolums {
				bCurrent = true
			} else {
				bCurrent = false
			}
		} else {
			bCurrent = true
		}

		var insIdSelected string
		if bCurrent {
			insIdSelected = insIdCurrent
			candlesSelected = append(candlesSelected, candlesCurrent[i])
		} else {
			insIdSelected = insIdNext
			candlesSelected = append(candlesSelected, candleNext)
		}
		log.Println("insId Selected:", insIdSelected, candlesCurrent[i].TickVolums, candleNext.TickVolums, ok)
		fileCopy(insIdSelected, "tk", candlesCurrent[i].Timestamp)
		fileCopy(insIdSelected, "M1", candlesCurrent[i].Timestamp)
		fileCopy(insIdSelected, "M5", candlesCurrent[i].Timestamp)
		fileCopy(insIdSelected, "H1", candlesCurrent[i].Timestamp)
	}
	fnameD1 := "./fzmnew/ctp/ctp_IFMI/D1.gz"
	log.Println("fuck", len(candlesSelected), candlesSelected)
	candles, _ := combinEx(fnameD1, candlesSelected)
	_, err = market.SaveCandlesEx("./fzmnew/ctp", "ctp_IFMI", candles, market.D1, true)
	if err != nil {
		log.Println(err)
		return
	}
}

func fileExist(t int64) bool {
	tm := time.Unix(t/1000, 0)
	fname := fmt.Sprintf("fzmnew/ctp/ctp_IFMI/%d/%04d%02d%02d.M1.gz", tm.Year(), tm.Year(), tm.Month(), tm.Day())
	if _, err := os.Stat(fname); !os.IsNotExist(err) {
		return true
	} else {
		log.Println("not exist:", fname)
		return false
	}
}

func fileCopy(insIdSour, period string, t int64) {
	tm := time.Unix(t/1000, 0)
	dataDir := fmt.Sprintf("./fzmnew/ctp/ctp_IFMI/%d", tm.Year())
	os.MkdirAll(dataDir, 0777)
	fileNameDest := fmt.Sprintf("./fzmnew/ctp/ctp_IFMI/%d/%04d%02d%02d.%s.gz", tm.Year(), tm.Year(), tm.Month(), tm.Day(), period)
	fileNameSour := fmt.Sprintf("./fzmnew/ctp/%s/%d/%04d%02d%02d.%s.gz", insIdSour, tm.Year(), tm.Year(), tm.Month(), tm.Day(), period)
	fileSour, err := os.Open(fileNameSour)
	if err != nil {
		log.Println("os.Open", fileNameDest, err)
		return
	}
	defer fileSour.Close()
	fileDest, err := os.Create(fileNameDest)
	if err != nil {
		log.Println("os.Create", fileNameDest, err)
		return
	}
	defer fileDest.Close()
	_, err = io.Copy(fileDest, fileSour)
	if err != nil {
		log.Println(fileNameDest, err)
		return
	}
}

func combinEx(filename string, candles []market.Candle) ([]market.Candle, error) {
	buf, err := market.ReadCandleFile(filename)
	if err != nil {
		return candles, err
	}

	candles = append(buf, candles[:]...)

	sort.Sort(byTime(candles))

	return candles, nil
}