//go:build windows

package filedate

import (
	"fmt"
	"golang.org/x/sys/windows"
	"time"
)

func SetFileTime(path string, ctime, atime, mtime time.Time) error {
	path16, err := windows.UTF16PtrFromString(path)
	if err != nil {
		return err
	}

	handle, err := windows.CreateFile(
		path16,
		windows.FILE_WRITE_ATTRIBUTES,
		windows.FILE_SHARE_READ|windows.FILE_SHARE_WRITE|windows.FILE_SHARE_DELETE,
		nil,
		windows.OPEN_EXISTING,
		windows.FILE_FLAG_BACKUP_SEMANTICS,
		0,
	)
	if err != nil {
		return fmt.Errorf("CreateFile failed: %w", err)
	}
	defer windows.CloseHandle(handle)

	var (
		ctimePtr *windows.Filetime
		atimePtr *windows.Filetime
		mtimePtr *windows.Filetime
	)

	if !ctime.IsZero() {
		ctimeFt := windows.NsecToFiletime(ctime.UnixNano())
		ctimePtr = &ctimeFt
	}
	if !atime.IsZero() {
		atimeFt := windows.NsecToFiletime(atime.UnixNano())
		atimePtr = &atimeFt
	}
	if !mtime.IsZero() {
		mtimeFt := windows.NsecToFiletime(mtime.UnixNano())
		mtimePtr = &mtimeFt
	}

	if err := windows.SetFileTime(handle, ctimePtr, atimePtr, mtimePtr); err != nil {
		return fmt.Errorf("SetFileTime failed: %w", err)
	}
	return nil
}