package ssh

import (
	"io"

	"forge.cadoles.com/wpetit/rebound/stat"
)

const (
	StatTotalOpenedTunnels = "total_opened_tunnels"
	StatTotalTxBytes       = "total_tx_bytes"
	StatTotalRxBytes       = "total_rx_bytes"
)

type instrumentedWriter struct {
	name     string
	stats    *stat.Store
	internal io.Writer
}

// Write implements io.Writer.
func (w *instrumentedWriter) Write(p []byte) (n int, err error) {
	n, err = w.internal.Write(p)
	w.stats.Add(w.name, float64(n), 0)
	return n, err
}

var _ io.Writer = &instrumentedWriter{}

type instrumentedReader struct {
	name     string
	stats    *stat.Store
	internal io.Reader
}

// Read implements io.Reader.
func (w *instrumentedReader) Read(p []byte) (n int, err error) {
	n, err = w.internal.Read(p)
	w.stats.Add(w.name, float64(n), 0)
	return n, err
}

var _ io.Reader = &instrumentedReader{}