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package main

//go:generate go tool gen --schema schema.cue --go args.gen.go --nix ../../nix/options.gen.nix

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

	"go.jolheiser.com/tailroute"
)

func main() {
	fs := flag.NewFlagSet("tailproxy", flag.ExitOnError)
	args := defaultArgs()
	registerFlags(fs, &args)
	if err := fs.Parse(os.Args[1:]); err != nil {
		panic(err)
	}
	if err := args.validate(); err != nil {
		panic(err)
	}

	if args.AuthKeyFile != "" {
		key, err := os.ReadFile(args.AuthKeyFile)
		if err != nil {
			panic(err)
		}
		args.AuthKey = strings.TrimSpace(string(key))
	}

	os.Setenv("TS_AUTHKEY", args.AuthKey)

	proxyURL, err := url.Parse(fmt.Sprintf("http://%s:%d", args.Host, 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)
	}
}