package store

import "testing"
import "unsafe"
import "bytes"
import "encoding/binary"
import "sync"
import "time"
import "os"
import "io"
import "log"
import "strings"
import "compress/gzip"
import "encoding/json"

type ohlc struct {
	Open  float64
	High  float64
	Low   float64
	Close float64
	Time  int32
	Ms    int32
}

type ohlcsave struct {
	ohlc
}

//日志时间精确到秒
func (save *ohlcsave) GetTime() int32 {
	return save.Time
}

func (save *ohlcsave) GetId() int64 {
	return 1
}

//全局变量，可以提高性能
var sizeofohlcsave = int(unsafe.Sizeof(ohlcsave{}))

//减少垃圾回收器的使用次数
var fhBytes = sync.Pool{
	New: func() interface{} {
		buf := make([]byte, sizeofohlcsave)
		return &buf
	},
}

func (save *ohlcsave) GetData() []byte {
	bufp := fhBytes.Get().(*[]byte)
	defer fhBytes.Put(bufp)
	buf := bytes.NewBuffer(*bufp)
	buf.Reset()
	err := binary.Write(buf, binary.LittleEndian, save)
	if err != nil {
		return nil
	}
	return buf.Bytes()
}

func (save *ohlcsave) Size() int {
	return sizeofohlcsave
}

func (save *ohlcsave) LoadData(data []byte) LoggingSave {
	reader := bytes.NewBuffer(data)
	var ret ohlcsave
	err := binary.Read(reader, binary.LittleEndian, &ret)
	if err != nil {
		return nil
	}
	return &ret
}

func printDebug(fname string, empty LoggingSave) error {
	log.Println(fname)
	fp, err := os.Open(fname)
	if err != nil {
		return err
	}
	defer fp.Close()
	var lasttime, readonly, lastcount int32
	err = binary.Read(fp, binary.LittleEndian, &lasttime)
	if err != nil {
		return err
	}
	log.Println("lasttime", lasttime)
	err = binary.Read(fp, binary.LittleEndian, &readonly)
	if err != nil {
		return err
	}
	log.Println("readonly", readonly)
	err = binary.Read(fp, binary.LittleEndian, &lastcount)
	if err != nil {
		return err
	}
	log.Println("lastcount", lastcount)
	buf := make([]byte, empty.Size())
	for err == nil {
		_, err = io.ReadFull(fp, buf)
		if err != nil {
			if err != io.EOF {
				return err
			} else {
				return nil
			}
		}
		data := empty.LoadData(buf).(*ohlcsave)
		log.Println(data)
	}

	return nil
}

func printZip(fname string, empty LoggingSave) error {
	fnameZip := strings.Replace(fname, ".bin", ".gz", 1)
	log.Println(fnameZip)
	fpz, err := os.Open(fnameZip)
	if err != nil {
		return err
	}
	defer fpz.Close()
	gr, err := gzip.NewReader(fpz)
	if err != nil {
		return err
	}
	var lasttime, readonly, lastcount int32
	err = binary.Read(gr, binary.LittleEndian, &lasttime)
	if err != nil {
		return err
	}
	log.Println("lasttime", lasttime)
	err = binary.Read(gr, binary.LittleEndian, &readonly)
	if err != nil {
		return err
	}
	log.Println("readonly", readonly)
	err = binary.Read(gr, binary.LittleEndian, &lastcount)
	if err != nil {
		return err
	}
	log.Println("lastcount", lastcount)
	var data ohlcsave
	for err == nil {
		err = binary.Read(gr, binary.LittleEndian, &data)
		if err != nil {
			if err != io.EOF {
				return err
			} else {
				return nil
			}
		}
		log.Println(data)
	}
	return nil
}

func printIdx(fname string) ([fileDuration]int64, error) {
	var datas [fileDuration]int64
	fnameIdx := strings.Replace(fname, ".bin", ".idx", 1)
	log.Println(fnameIdx)
	f, err := os.Open(fnameIdx)
	if err != nil {
		return datas, err
	}
	defer f.Close()
	dec := json.NewDecoder(f)
	err = dec.Decode(&datas)
	if err != nil {
		return datas, err
	}
	log.Println(datas)
	return datas, nil
}

func TestWrite(t *testing.T) {
	ohlcs := &ohlcsave{}
	save, err := NewSaveWriter("path", "test", false, ohlcs, nil)
	if err != nil {
		t.Error(err)
		return
	}
	defer save.Close()

	err = printDebug(save.cur.Name(), ohlcs)
	if err != nil {
		log.Println(err)
	}
	save.PrintDataIndex()
	datas := save.GetData(0, 0, 2, 1000, ohlcs)
	for _, v := range datas {
		log.Println("GetData", v)
	}

	cur := time.Now()
	now := cur.Unix() - 0
	log.Println("cur", now, cur)
	data := ohlc{1, 1, 1, 1, int32(now), 0}
	s := &ohlcsave{data}
	err = save.Save(s)
	if err != nil {
		t.Error(err)
		return
	}
	save.Flush()
}

func BenchmarkWrite(b *testing.B) {
	ohlcs := &ohlcsave{}
	save, err := NewSaveWriter("path", "test", false, ohlcs, nil)
	if err != nil {
		b.Error(err)
		return
	}
	defer save.Close()
	for i := 0; i < b.N; i++ {
		now := time.Now().Unix()
		data := ohlc{1, 1, 1, 1, int32(now), int32(i)}
		s := &ohlcsave{data}
		err := save.Save(s)
		if err != nil {
			b.Error(err)
			return
		}
	}
}