//go:build windows

package main

import (
	"log"
	"net"
	"os"
	"os/exec"
	"path/filepath"
	"strconv"
	"strings"

	"vrc_osc_go/internal/app"
	"vrc_osc_go/internal/config"
)

func main() {
	initialTab := parseInitialTab(os.Args[1:])
	if exe, err := os.Executable(); err == nil {
		_ = app.AppendRuntimeLog("GUI", "starting vrc_osc_gui.exe exe="+exe+" dir="+filepath.Dir(exe)+" initial_tab="+initialTab)
	} else {
		_ = app.AppendRuntimeLog("GUI", "starting vrc_osc_gui.exe exe=unknown err="+err.Error())
	}
	ensureRuntimeStarted()
	if err := runNativeGUI(initialTab); err != nil {
		_ = app.AppendRuntimeLog("GUI", "runNativeGUI failed: "+err.Error())
		log.Fatal(err)
	}
	_ = app.AppendRuntimeLog("GUI", "runNativeGUI returned cleanly")
}

func parseInitialTab(args []string) string {
	for _, arg := range args {
		switch {
		case arg == "--settings" || arg == "-settings" || arg == "/settings":
			return "settings"
		case arg == "--translate" || arg == "-translate" || arg == "/translate":
			return "join"
		case arg == "--log" || arg == "-log" || arg == "/log":
			return "join"
		case strings.HasPrefix(arg, "--tab="):
			if tab := normalizeInitialTab(strings.TrimPrefix(arg, "--tab=")); tab != "" {
				return tab
			}
		case strings.HasPrefix(arg, "/tab="):
			if tab := normalizeInitialTab(strings.TrimPrefix(arg, "/tab=")); tab != "" {
				return tab
			}
		}
	}
	return "join"
}

func normalizeInitialTab(tab string) string {
	switch strings.ToLower(strings.TrimSpace(tab)) {
	case "join", "log", "logs":
		return "join"
	case "translate", "translation":
		return "join"
	case "settings", "setting", "config":
		return "settings"
	default:
		return ""
	}
}

func ensureRuntimeStarted() {
	cfg, err := config.Load("")
	if err != nil {
		_ = app.AppendRuntimeLog("GUI", "runtime autostart skipped config="+err.Error())
		return
	}
	addr := net.JoinHostPort(cfg.OSC.Host, strconv.Itoa(cfg.OSC.Port))
	probe, err := net.ListenPacket("udp", addr)
	if err != nil {
		_ = app.AppendRuntimeLog("GUI", "runtime already listening addr="+addr+" err="+err.Error())
		return
	}
	_ = probe.Close()

	exe, err := os.Executable()
	if err != nil {
		_ = app.AppendRuntimeLog("GUI", "runtime autostart skipped exe="+err.Error())
		return
	}
	runtimeExe := filepath.Join(filepath.Dir(exe), "vrc_osc.exe")
	if _, err := os.Stat(runtimeExe); err != nil {
		_ = app.AppendRuntimeLog("GUI", "runtime autostart missing exe="+runtimeExe+" err="+err.Error())
		return
	}
	if err := exec.Command(runtimeExe, "--no-gui").Start(); err != nil {
		_ = app.AppendRuntimeLog("GUI", "runtime autostart failed exe="+runtimeExe+" err="+err.Error())
		return
	}
	_ = app.AppendRuntimeLog("GUI", "runtime autostart launched exe="+runtimeExe)
}