package main

import (
	"os/exec"
	"syscall"
	"unsafe"
)

var (
	user32  = syscall.NewLazyDLL("user32.dll")
	msgBoxW = user32.NewProc("MessageBoxW")
)

const (
	mbOK            = 0x00000000
	mbIconWarning   = 0x00000030
	mbSetForeground = 0x00010000
	mbTopmost       = 0x00040000
)

func showMessageBox(title, msg string) {
	ptitle, err := syscall.UTF16PtrFromString(title)
	if err != nil {
		return
	}
	ptext, err := syscall.UTF16PtrFromString(msg)
	if err != nil {
		return
	}

	msgBoxW.Call(0,
		uintptr(unsafe.Pointer(ptext)),
		uintptr(unsafe.Pointer(ptitle)),
		uintptr(mbOK|mbIconWarning|mbSetForeground|mbTopmost),
	)
}

func runNotepad(path string) {
	err := exec.Command("notepad.exe", path).Start()
	if err != nil {
		showMessageBox("错误", "无法打开记事本: "+err.Error())
	}
}