//go:build darwin

package main

import (
	"bytes"
	"fmt"
	"log"
	"net/http"
	"os"
	"os/exec"
	"os/signal"
	"syscall"
	"time"

	"github.com/crgimenes/glaze"

	"vpnclient/internal/apphost"
	"vpnclient/internal/config"
	"vpnclient/internal/core"
	"vpnclient/internal/update"
)

func main() {
	if update.MaybeFinishUpdate(os.Args[1:]) {
		return
	}
	update.CleanupStaleDownloads()
	log.SetFlags(log.LstdFlags | log.Lshortfile)

	cfgPath, err := config.LocateConfig()
	if err != nil {
		fatalf("Не удалось найти путь конфига: %v", err)
	}
	if _, err := os.Stat(cfgPath); os.IsNotExist(err) {
		if err := config.WriteExample(cfgPath); err != nil {
			fatalf("Не удалось создать конфиг: %v", err)
		}
	}
	cfg, err := config.Load(cfgPath)
	if err != nil {
		fatalf("Ошибка конфига %s: %v", cfgPath, err)
	}
	logBuf := &bytes.Buffer{}
	mgr, err := core.NewManager(cfgPath, cfg, logBuf)
	if err != nil {
		fatalf("%v", err)
	}

	a := apphost.New(mgr, cfgPath, logBuf)
	a.OpenURL = func(u string) error {
		return exec.Command("open", u).Start()
	}
	a.OnAfterUpdate = func() {
		go func() {
			time.Sleep(300 * time.Millisecond)
			os.Exit(0)
		}()
	}

	ln, uiURL, token, err := apphost.ListenLocal()
	if err != nil {
		fatalf("listen: %v", err)
	}
	a.APIToken = token
	srv := &http.Server{Handler: a.Handler()}
	go func() {
		_ = srv.Serve(ln)
	}()
	go a.AutoCheckUpdate()

	w, err := glaze.New(false)
	if err != nil || w == nil {
		log.Printf("webview unavailable (%v); opening default browser", err)
		if err2 := exec.Command("open", uiURL).Run(); err2 != nil {
			fatalf("Не удалось открыть интерфейс:\n%v\n%v\n%s", err, err2, uiURL)
		}
		log.Printf("Navis UI: %s", uiURL)
		sig := make(chan os.Signal, 1)
		signal.Notify(sig, os.Interrupt, syscall.SIGTERM)
		<-sig
		_ = mgr.Disconnect()
		_ = srv.Close()
		return
	}
	defer func() {
		_ = mgr.Disconnect()
		_ = srv.Close()
		w.Destroy()
	}()

	w.SetTitle("Navis 2")
	w.SetSize(500, 900, glaze.HintNone)
	w.Navigate(uiURL)
	log.Printf("Navis UI: %s", uiURL)
	w.Run()
}

func fatalf(format string, args ...any) {
	msg := fmt.Sprintf(format, args...)
	log.Println(msg)
	_ = exec.Command("osascript", "-e", fmt.Sprintf(`display alert "Navis" message %q`, msg)).Run()
	os.Exit(1)
}