package main

import (
	"bytes"
	"strings"
	"testing"
)

func TestRunVersion(t *testing.T) {
	var out, errOut bytes.Buffer
	code := run([]string{"version"}, &out, &errOut)
	if code != 0 {
		t.Fatalf("exit code = %d, want 0 (stderr: %s)", code, errOut.String())
	}
	got := out.String()
	for _, want := range []string{"vpnportal", "commit", "built"} {
		if !strings.Contains(got, want) {
			t.Errorf("output %q missing %q", got, want)
		}
	}
}

func TestRunUnknownCommand(t *testing.T) {
	var out, errOut bytes.Buffer
	if code := run([]string{"frobnicate"}, &out, &errOut); code != 2 {
		t.Fatalf("exit code = %d, want 2", code)
	}
	if !strings.Contains(errOut.String(), "frobnicate") {
		t.Errorf("stderr should name the unknown command, got %q", errOut.String())
	}
}

func TestRunNoArgsDefaultsToServe(t *testing.T) {
	var out, errOut bytes.Buffer
	// serve ohne --config muss mit Fehler abbrechen, nicht mit "unknown command"
	code := run(nil, &out, &errOut)
	if code == 2 {
		t.Fatalf("no args must default to serve, not unknown-command")
	}
	if !strings.Contains(errOut.String(), "config") {
		t.Errorf("stderr should complain about missing config, got %q", errOut.String())
	}
}