//go:build windows

package game

import (
	"unsafe"

	"golang.org/x/sys/windows"
)

// processes lists the running processes via the Toolhelp32 snapshot API.
func processes() ([]Process, error) {
	h, err := windows.CreateToolhelp32Snapshot(windows.TH32CS_SNAPPROCESS, 0)
	if err != nil {
		return nil, err
	}
	defer windows.CloseHandle(h) //nolint:errcheck // best effort

	var entry windows.ProcessEntry32
	entry.Size = uint32(unsafe.Sizeof(entry))
	if err := windows.Process32First(h, &entry); err != nil {
		return nil, err
	}
	var ps []Process
	for {
		ps = append(ps, Process{
			PID:  int(entry.ProcessID),
			Name: windows.UTF16ToString(entry.ExeFile[:]),
		})
		if err := windows.Process32Next(h, &entry); err != nil {
			break // ERROR_NO_MORE_FILES ends the walk
		}
	}
	return ps, nil
}