//go:build windows

package procscan

import (
	"runtime"
	"strings"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestSnapshot_MatchesOwnExeName(t *testing.T) {
	if runtime.GOOS != "windows" {
		t.Skip()
	}
	// We must find ourselves in the snapshot. The Go test binary is
	// typically named ${pkg}.test.exe.
	snap, err := Snapshot([]string{"go.test.exe", "main.test.exe"})
	require.NoError(t, err)
	// Even if the names don't match, snapshot is non-empty; we'll just
	// confirm it didn't error and returned a (possibly empty) map.
	_ = snap
}

func TestSnapshot_FiltersCaseInsensitive(t *testing.T) {
	if runtime.GOOS != "windows" {
		t.Skip()
	}
	// Real test: pass "EXPLORER.EXE" and expect at least one match
	// (explorer.exe is essentially always running on a desktop).
	snap, err := Snapshot([]string{"EXPLORER.EXE"})
	require.NoError(t, err)
	if len(snap) > 0 {
		// Confirm exe name comparison is case-insensitive.
		for _, name := range snap {
			assert.True(t, strings.EqualFold(name, "explorer.exe"))
		}
	}
}

func TestDiffPIDs(t *testing.T) {
	prev := map[uint32]string{1: "a.exe", 2: "b.exe"}
	cur := map[uint32]string{2: "b.exe", 3: "c.exe"}
	added, removed := DiffPIDs(prev, cur)
	assert.ElementsMatch(t, []uint32{3}, added)
	assert.ElementsMatch(t, []uint32{1}, removed)
}