// main.go
package main

import (
	"flag"
	"log"
	"os"
	"sort"

	"tickserver/server/market"
)

func main() {
	flag.Parse()
	n := flag.NArg()
	if n != 2 {
		log.Println("must input 2 files to be combined", n)
		return
	}
	fileMain := flag.Arg(0)
	fileAppend := flag.Arg(1)
	log.Println("main:", fileMain, "append", fileAppend)
	candles, err := market.ReadCandleFile(fileAppend)
	if err != nil {
		log.Println(err)
		return
	}
	candles, err = combin(fileMain, candles)
	if err != nil {
		log.Println(err)
		return
	}
	w, err := os.Create(fileMain)
	if err != nil {
		log.Println(err)
		return
	}
	defer w.Close()
	err = market.ZipCBuf(w, candles)
	if err != nil {
		log.Println(err)
		return
	}
}

// 把之前文件中candles和新的合并
func combin(filename string, candles []market.Candle) ([]market.Candle, error) {
	buf, err := market.ReadCandleFile(filename)
	if err != nil {
		return candles, err
	}
	// 去除重复数据
	ts := buf[len(buf)-1].Timestamp
	n := sort.Search(len(candles), func(i int) bool {
		if candles[i].Timestamp >= ts {
			return true
		}
		return false
	})
	if n == len(candles) {
		n = 0
	}
	if candles[n].Timestamp == ts {
		n += 1
	}
	candles = append(buf, candles[n:]...)
	return candles, nil
}