From 1bd203c5555046b7ee4fbfe2f822eb3d03571ad7 Mon Sep 17 00:00:00 2001
From: SergeiEU <39683682+SergeiEU@users.noreply.github.com>
Date: Wed, 1 Apr 2026 10:17:15 +0400
Subject: Initial import

---
 cmd/client/main.go | 96 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 cmd/client/main.go

(limited to 'cmd/client/main.go')

diff --git a/cmd/client/main.go b/cmd/client/main.go
new file mode 100644
index 0000000..0b2fd6f
--- /dev/null
+++ b/cmd/client/main.go
@@ -0,0 +1,96 @@
+package main
+
+import (
+	"embed"
+	"flag"
+	"log"
+	"os"
+	"path/filepath"
+	"runtime"
+
+	"github.com/wailsapp/wails/v2"
+	"github.com/wailsapp/wails/v2/pkg/options"
+	"github.com/wailsapp/wails/v2/pkg/options/assetserver"
+)
+
+//go:embed frontend/dist
+var assets embed.FS
+
+func main() {
+	apiURL := flag.String("api", "https://vpn.em-sysadmin.xyz", "API server URL")
+	dataDir := flag.String("data", defaultDataDir(), "data directory")
+	flag.Parse()
+
+	// Ensure data dir exists
+	os.MkdirAll(*dataDir, 0o755)
+
+	// Setup file logging so we always have diagnostics
+	logPath := filepath.Join(*dataDir, "vpnem.log")
+	logFile, err := os.OpenFile(logPath, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0o644)
+	if err == nil {
+		log.SetOutput(logFile)
+		defer logFile.Close()
+	}
+
+	log.Printf("vpnem starting, data=%s, api=%s, os=%s", *dataDir, *apiURL, runtime.GOOS)
+
+	// Kill previous instances of vpnem and sing-box
+	killPrevious()
+
+	// Check wintun.dll on Windows
+	if runtime.GOOS == "windows" {
+		exe, _ := os.Executable()
+		exeDir := filepath.Dir(exe)
+		wintunPaths := []string{
+			filepath.Join(exeDir, "wintun.dll"),
+			filepath.Join(*dataDir, "wintun.dll"),
+			"wintun.dll",
+		}
+		found := false
+		for _, p := range wintunPaths {
+			if _, err := os.Stat(p); err == nil {
+				log.Printf("wintun.dll found: %s", p)
+				found = true
+				break
+			}
+		}
+		if !found {
+			log.Printf("WARNING: wintun.dll not found! TUN will fail. Searched: %v", wintunPaths)
+		}
+	}
+
+	app := NewApp(*dataDir, *apiURL)
+
+	log.Println("starting Wails UI")
+	if err := wails.Run(&options.App{
+		Title:     "vpnem",
+		Width:     480,
+		Height:    600,
+		MinWidth:  400,
+		MinHeight: 500,
+		AssetServer: &assetserver.Options{
+			Assets: assets,
+		},
+		OnStartup:  app.startup,
+		OnShutdown: app.shutdown,
+		Bind: []interface{}{
+			app,
+		},
+	}); err != nil {
+		log.Printf("FATAL wails error: %v", err)
+		// On Windows, also write to a visible error file
+		if runtime.GOOS == "windows" {
+			errPath := filepath.Join(*dataDir, "ERROR.txt")
+			os.WriteFile(errPath, []byte("vpnem failed to start:\n"+err.Error()+"\n\nCheck vpnem.log for details.\n"), 0o644)
+		}
+		os.Exit(1)
+	}
+}
+
+func defaultDataDir() string {
+	if runtime.GOOS == "windows" {
+		return `C:\ProgramData\vpnem`
+	}
+	home, _ := os.UserHomeDir()
+	return filepath.Join(home, ".local", "share", "vpnem")
+}
-- 
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