package shared

import (
	"fmt"
	"syscall"
	"unsafe"
)

// Constants for the SHFileOperation function
const (
	FO_DELETE          = 3
	FOF_ALLOWUNDO      = 0x0040 // Move to Recycle Bin instead of permanently deleting
	FOF_NOCONFIRMATION = 0x0010 // No confirmation dialogs
)

// SHFILEOPSTRUCT structure (Windows API)
type SHFILEOPSTRUCT struct {
	Hwnd                  uintptr
	WFunc                 uint32
	PFrom                 *uint16
	PTo                   *uint16
	FFlags                uint16
	FAnyOperationsAborted bool
	HNameMappings         uintptr
	LpszProgressTitle     *uint16
}

// MoveToTrash moves a file or folder to the Windows Recycle Bin.
func MoveToTrash(path string) error {
	// The string must be double null-terminated for the Windows API
	from, err := syscall.UTF16FromString(path)
	if err != nil {
		return err
	}

	op := SHFILEOPSTRUCT{
		WFunc:  FO_DELETE,
		PFrom:  &from[0],
		FFlags: FOF_ALLOWUNDO | FOF_NOCONFIRMATION,
	}

	shell32 := syscall.NewLazyDLL("shell32.dll")
	shFileOperation := shell32.NewProc("SHFileOperationW")

	ret, _, _ := shFileOperation.Call(uintptr(unsafe.Pointer(&op)))
	if ret != 0 {
		return fmt.Errorf("failed to move to trash: error code %d", ret)
	}

	return nil
}