/*
 * ============================================================================
 * Projekt.....: rs2322tcp
 * Datei.......: internal/client/virtual_port_validation_test.go
 * Copyright (C) 2026 Dieter Lang
 *
 * SPDX-License-Identifier: GPL-3.0-or-later
 *
 * Beschreibung:
 * Tests für den Vergleich der konfigurierten und tatsächlich vorhandenen
 * virtuellen rs2322tcp-Schnittstellen.
 * ============================================================================
 */
package client

import (
	"reflect"
	"testing"
)

func TestCompareVirtualPortsIdentical(t *testing.T) {
	configured := []string{
		"/dev/ttyUSB100",
		"/dev/ttyUSB101",
	}

	available := []string{
		"/dev/ttyUSB101",
		"/dev/ttyUSB100",
	}

	got := compareVirtualPorts(
		configured,
		available,
	)

	if len(got.Missing) != 0 {
		t.Errorf(
			"Missing = %v, want empty",
			got.Missing,
		)
	}

	if len(got.Extra) != 0 {
		t.Errorf(
			"Extra = %v, want empty",
			got.Extra,
		)
	}
}

func TestCompareVirtualPortsMissing(t *testing.T) {
	configured := []string{
		"/dev/ttyUSB100",
		"/dev/ttyUSB101",
		"/dev/ttyUSB102",
	}

	available := []string{
		"/dev/ttyUSB100",
		"/dev/ttyUSB101",
	}

	got := compareVirtualPorts(
		configured,
		available,
	)

	wantMissing := []string{
		"/dev/ttyUSB102",
	}

	if !reflect.DeepEqual(got.Missing, wantMissing) {
		t.Errorf(
			"Missing = %v, want %v",
			got.Missing,
			wantMissing,
		)
	}

	if len(got.Extra) != 0 {
		t.Errorf(
			"Extra = %v, want empty",
			got.Extra,
		)
	}
}

func TestCompareVirtualPortsExtra(t *testing.T) {
	configured := []string{
		"/dev/ttyUSB100",
		"/dev/ttyUSB101",
	}

	available := []string{
		"/dev/ttyUSB100",
		"/dev/ttyUSB101",
		"/dev/ttyUSB103",
	}

	got := compareVirtualPorts(
		configured,
		available,
	)

	if len(got.Missing) != 0 {
		t.Errorf(
			"Missing = %v, want empty",
			got.Missing,
		)
	}

	wantExtra := []string{
		"/dev/ttyUSB103",
	}

	if !reflect.DeepEqual(got.Extra, wantExtra) {
		t.Errorf(
			"Extra = %v, want %v",
			got.Extra,
			wantExtra,
		)
	}
}

func TestCompareVirtualPortsMissingAndExtra(t *testing.T) {
	configured := []string{
		"/dev/ttyUSB100",
		"/dev/ttyUSB101",
		"/dev/ttyUSB102",
	}

	available := []string{
		"/dev/ttyUSB100",
		"/dev/ttyUSB101",
		"/dev/ttyUSB103",
	}

	got := compareVirtualPorts(
		configured,
		available,
	)

	wantMissing := []string{
		"/dev/ttyUSB102",
	}

	wantExtra := []string{
		"/dev/ttyUSB103",
	}

	if !reflect.DeepEqual(got.Missing, wantMissing) {
		t.Errorf(
			"Missing = %v, want %v",
			got.Missing,
			wantMissing,
		)
	}

	if !reflect.DeepEqual(got.Extra, wantExtra) {
		t.Errorf(
			"Extra = %v, want %v",
			got.Extra,
			wantExtra,
		)
	}
}

func TestCompareVirtualPortsEmpty(t *testing.T) {
	got := compareVirtualPorts(
		nil,
		nil,
	)

	if len(got.Missing) != 0 {
		t.Errorf(
			"Missing = %v, want empty",
			got.Missing,
		)
	}

	if len(got.Extra) != 0 {
		t.Errorf(
			"Extra = %v, want empty",
			got.Extra,
		)
	}
}

func TestCompareVirtualPortsConfiguredOnly(t *testing.T) {
	configured := []string{
		"/dev/ttyUSB100",
		"/dev/ttyUSB101",
	}

	got := compareVirtualPorts(
		configured,
		nil,
	)

	wantMissing := []string{
		"/dev/ttyUSB100",
		"/dev/ttyUSB101",
	}

	if !reflect.DeepEqual(got.Missing, wantMissing) {
		t.Errorf(
			"Missing = %v, want %v",
			got.Missing,
			wantMissing,
		)
	}

	if len(got.Extra) != 0 {
		t.Errorf(
			"Extra = %v, want empty",
			got.Extra,
		)
	}
}

func TestCompareVirtualPortsAvailableOnly(t *testing.T) {
	available := []string{
		"/dev/ttyUSB100",
		"/dev/ttyUSB101",
	}

	got := compareVirtualPorts(
		nil,
		available,
	)

	if len(got.Missing) != 0 {
		t.Errorf(
			"Missing = %v, want empty",
			got.Missing,
		)
	}

	wantExtra := []string{
		"/dev/ttyUSB100",
		"/dev/ttyUSB101",
	}

	if !reflect.DeepEqual(got.Extra, wantExtra) {
		t.Errorf(
			"Extra = %v, want %v",
			got.Extra,
			wantExtra,
		)
	}
}

func TestCompareVirtualPortsIgnoresDuplicates(t *testing.T) {
	configured := []string{
		"/dev/ttyUSB100",
		"/dev/ttyUSB100",
	}

	available := []string{
		"/dev/ttyUSB100",
		"/dev/ttyUSB100",
	}

	got := compareVirtualPorts(
		configured,
		available,
	)

	if len(got.Missing) != 0 {
		t.Errorf(
			"Missing = %v, want empty",
			got.Missing,
		)
	}

	if len(got.Extra) != 0 {
		t.Errorf(
			"Extra = %v, want empty",
			got.Extra,
		)
	}
}