package main

import (
	"flag"
	"log"
	"os"
	"path/filepath"
	"runtime"
	"time"
)

// version is injected at build time via -ldflags "-X main.version=X.Y.Z"
var version = "dev"

const (
	AGENT_VERSION = "0.3.0"
	APP_NAME      = "studioE5"
)

var (
	dataDir   = flag.String("data-dir", "./studioE5-data", "Répertoire de données")
	uiEnabled = flag.Bool("ui", true, "Activer l'interface locale HTMX")
	noTray    = flag.Bool("no-tray", false, "Désactiver l'icône dans la barre système (mode console)")
)

func defaultNodeID() string {
	h, err := os.Hostname()
	if err != nil {
		return "unknown"
	}
	return h
}

func main() {
	flag.Parse()

	dd := *dataDir
	if !filepath.IsAbs(dd) {
		ex, err := os.Executable()
		if err == nil {
			dd = filepath.Join(filepath.Dir(ex), dd)
		} else {
			wd, _ := os.Getwd()
			dd = filepath.Join(wd, dd)
		}
	}
	*dataDir = dd

	if err := os.MkdirAll(*dataDir, 0755); err != nil {
		log.Fatalf("Cannot create data-dir: %v", err)
	}

	cfg, created, err := loadOrCreateConfig(*dataDir)
	if err != nil {
		log.Fatalf("Cannot load config: %v", err)
	}

	if cfg.Server == "" {
		cfg.Server = "ws://localhost:3001"
	}
	if cfg.NodeID == "" {
		cfg.NodeID = defaultNodeID()
	}
	if cfg.DataDir == "" {
		cfg.DataDir = *dataDir
	}

	if err := saveConfig(*dataDir, cfg); err != nil {
		log.Fatalf("Cannot save config: %v", err)
	}

	log.Printf("[%s Agent] version=%s node=%s data-dir=%s server=%s", APP_NAME, AGENT_VERSION, cfg.NodeID, *dataDir, cfg.Server)

	if *uiEnabled {
		go startUI(*dataDir, cfg.NodeID, cfg.Server)
		if created {
			go openBrowser(uiURL + "#settings")
		}
	}

	go startWebSocket(cfg.Server, cfg.NodeID, *dataDir, cfg.HeadscaleURL, cfg.HeadscaleAuthKey)

	shutdownCh := make(chan struct{})
	if *noTray {
		log.Printf("[%s Agent] running in console mode (no tray)", APP_NAME)
		<-shutdownCh
		return
	}

	// Run tray on its own locked OS thread; keep main blocked so the process
	// does not exit when systray is not available (e.g. headless Linux).
	go func() {
		runtime.LockOSThread()
		defer runtime.UnlockOSThread()
		runTray(APP_NAME, shutdownCh)
	}()

	<-shutdownCh
}

func startTailscaleAndReport(dataDir, nodeID, headscaleURL, authKey string) {
	tsDir := filepath.Join(dataDir, "tailscale")
	ip, err := startTailscale(tsDir, nodeID, headscaleURL, authKey)
	if err != nil {
		log.Printf("Tailscale error: %v", err)
		return
	}
	log.Printf("Tailscale IP obtained: %s", ip)

	for {
		if err := sendMessage(WSMessage{Action: "tailscale_ip", NodeID: nodeID, TailscaleIP: ip}); err != nil {
			log.Printf("Waiting for WebSocket to send tailscale_ip...")
			time.Sleep(1 * time.Second)
			continue
		}
		log.Printf("Sent tailscale_ip to server: %s", ip)
		break
	}
}