// +build linux

package main

import (
	"context"
	"crypto/tls"
	"log"
	"os"
	"time"

	"git.xeserv.us/xena/route/internal/tun2"
	"github.com/Xe/ln"
)

var (
	token      = mustEnv("ROUTE_TOKEN", "")
	domain     = mustEnv("ROUTE_DOMAIN", "")
	backend    = mustEnv("ROUTE_BACKEND", "")
	method     = mustEnv("ROUTE_METHOD", "")
	serverAddr = mustEnv("ROUTE_LOAD_BALANCER", "")
	connMethod = mustEnv("ROUTE_METHOD", "tcp")
)

func mustEnv(key string, def string) string {
	val := os.Getenv(key)
	if val == "" {
		log.Printf("autohttpagent: %s not found, things may not work", key)
		return def
	}

	return val
}

func doHTTPAgent() {
	go func() {
		ctx, cancel := context.WithCancel(context.Background())
		defer cancel()

		cfg := &tun2.ClientConfig{
			TLSConfig:  &tls.Config{},
			ConnType:   connMethod,
			ServerAddr: serverAddr,
			Token:      token,
			Domain:     domain,
			BackendURL: backend,
		}

		client, _ := tun2.NewClient(cfg)
		err := client.Connect(ctx)
		if err != nil {
			ln.Error(ctx, err, ln.Action("client connection error, restarting"))

			time.Sleep(5 * time.Second)

			doHTTPAgent()
		}
	}()
}

func init() {
	doHTTPAgent()
}