package main

import (
	"crypto/tls"
	"flag"
	"log"
	"math/rand"
	"net"
	"net/http"
	"time"

	"git.xeserv.us/xena/route/lib/routecrypto"
	"git.xeserv.us/xena/route/server"
	"github.com/facebookgo/flagenv"
	_ "github.com/joho/godotenv/autoload"
	"golang.org/x/crypto/acme/autocert"
)

var (
	rethinkDBHost     = flag.String("rethink-host", "", "RethinkDB host")
	rethinkDBDatabase = flag.String("rethink-database", "", "RethinkDB database")
	controlKeyFile    = flag.String("control-key-file", "", "Control host keyfile")
	controlHost       = flag.String("control-host", "", "Control host onion hash")
	torDataDir        = flag.String("tor-data-dir", "./var", "Tor data directory")
	torHashedPassword = flag.String("tor-hashed-password", "", "Tor hashed password")
	torPassword       = flag.String("tor-password", "hunter2", "Tor clear password")
	webPort           = flag.String("web-port", "9234", "HTTP ingress port for backends and users")
	sslPort           = flag.String("ssl-port", "", "if set use this port for SSL HTTP requests (certs via LE, you agree to follow their TOS)")
	domainSuffix      = flag.String("domain-suffix", ".apps.xeserv.us", "Domain name suffix associated with the load balancer")
	backendPort       = flag.String("backend-port", "36971", "Port for TCP/TLS backends")
	backendKCPPort    = flag.String("backend-kcp-port", "23154", "Port for KCP/TLS backends")

	sslCertKey = flag.String("ssl-cert-key", "", "if set encrypt SSL certs with this key")
)

func main() {
	flag.Parse()
	flagenv.Parse()
	rand.Seed(time.Now().Unix())

	certKey, _ := routecrypto.ParseKey(*sslCertKey)

	s, err := server.New(server.Config{
		ControlHost:       *controlHost,
		ControlKeyFile:    *controlKeyFile,
		RethinkDBHost:     *rethinkDBHost,
		RethinkDBDatabase: *rethinkDBDatabase,
		TorDataDir:        *torDataDir,
		TorHashedPassword: *torHashedPassword,
		TorPassword:       *torPassword,
		WebPort:           *webPort,
		SSLPort:           *sslPort,
		DomainSuffix:      *domainSuffix,
		CertKey:           certKey,
		BackendPort:       ":" + *backendPort,
		KCPPort:           ":" + *backendKCPPort,
	})
	if err != nil {
		log.Fatal(err)
	}

	if *sslPort != "" {
		go setupACME(s)
	}

	l, err := net.Listen("tcp", "0.0.0.0:"+*webPort)
	if err != nil {
		log.Fatal(err)
	}
	defer l.Close()

	hs := &http.Server{
		Handler: s,
		Addr:    "0.0.0.0:" + *webPort,
	}

	hs.Serve(l)
}

func setupACME(s *server.Server) {
	m := autocert.Manager{
		Prompt:     autocert.AcceptTOS,
		Cache:      s.CertCache,
		HostPolicy: nil,
		Email:      "xena@yolo-swag.com",
	}

	hs := &http.Server{
		Handler: s,
		Addr:    "0.0.0.0:" + *sslPort,
		TLSConfig: &tls.Config{
			GetCertificate: m.GetCertificate,
		},
	}

	hs.ListenAndServeTLS("", "")
}