package hook

import (
	"encoding/base64"
	"tunnel/pkg/netstring"
	"tunnel/pkg/server/env"
	"tunnel/pkg/server/opts"
	"tunnel/pkg/server/queue"
)

var b64Enc = base64.RawStdEncoding

type b64Hook struct{}

func (b64Hook) Send(rq, wq queue.Q) error {
	e := netstring.NewEncoder(wq.Writer())

	for b := range rq {
		e.Encode(b64Enc.EncodeToString(b))
	}

	return nil
}

func (b64Hook) Recv(rq, wq queue.Q) error {
	d := netstring.NewDecoder(rq.Reader())

	for {
		s, err := d.Decode()
		if err != nil {
			return err
		}

		if b, err := b64Enc.DecodeString(s); err != nil {
			return err
		} else {
			wq <- b
		}
	}
}

func (h b64Hook) Open(env.Env) (interface{}, error) {
	return h, nil
}

func newB64Hook(opts.Opts, env.Env) (hook, error) {
	return b64Hook{}, nil
}

func init() {
	register("b64", newB64Hook)
}