package hook

import (
	"bufio"
	"strings"
	"tunnel/pkg/server/env"
	"tunnel/pkg/server/opts"
	"tunnel/pkg/server/queue"
)

type lookHttpHook struct{}

type lookHttp struct {
	env env.Env
}

func (look *lookHttp) Send(rq, wq queue.Q) error {
	q := queue.New()
	s := bufio.NewScanner(q.Reader())

	go func() {
		for b := range rq {
			q <- b
			wq <- b
		}

		close(q)
	}()

	if s.Scan() {
		if w := strings.Split(s.Text(), " "); len(w) > 1 {
			switch m := strings.ToUpper(w[0]); m {
			case "CONNECT", "GET", "POST":
				look.env.Set("look.info", m+" "+w[1])
			}
		}
	}

	q.Dry()

	return nil
}

func (look *lookHttp) Recv(rq, wq queue.Q) error {
	return queue.Copy(rq, wq)
}

func (lookHttpHook) Open(env env.Env) (interface{}, error) {
	return &lookHttp{env: env}, nil
}

func newLookHttpHook(opts opts.Opts, env env.Env) (hook, error) {
	return lookHttpHook{}, nil
}

func init() {
	register("look-http", newLookHttpHook)
}