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package main

import (
	"fmt"
	"net/http"
	"net/http/httputil"
	"net/url"
	"os"

	"github.com/peterbourgon/ff/v3"
	"go.jolheiser.com/ffjsonnet"
	"go.jolheiser.com/tailroute"
)

func main() {
	args, fs := Flags()
	fs.String("config", "tailproxy.jsonnet", "Config file")
	if err := ff.Parse(fs, os.Args[1:],
		ff.WithConfigFileFlag("config"),
		ff.WithAllowMissingConfigFile(true),
		ff.WithConfigFileParser(ffjsonnet.Parser),
	); err != nil {
		panic(err)
	}
	os.Setenv("TS_AUTHKEY", args.AuthKey)

	proxyURL, err := url.Parse(fmt.Sprintf("http://localhost:%d", args.Port))
	if err != nil {
		panic(err)
	}

	proxy := httputil.NewSingleHostReverseProxy(proxyURL)
	handler := http.HandlerFunc(proxy.ServeHTTP)

	r := tailroute.Router{
		Tailnet: handler,
	}
	if args.Funnel {
		r.Funnel = handler
	}

	if err := r.Serve(args.Hostname, args.DataDir); err != nil {
		panic(err)
	}
}