package agent

import (
	"os/exec"
	"strings"
	"testing"
)

// TestArchitecture_NoUIImportBelowAgent sichert E-04 mechanisch ab: Jede
// Ausgabe läuft über einen Event-Channel, kein Kern-Paket importiert
// internal/ui.
func TestArchitecture_NoUIImportBelowAgent(t *testing.T) {
	pkgs := []string{
		"nub/internal/agent",
		"nub/internal/llm/...",
		"nub/internal/tool/...",
		"nub/internal/config",
		"nub/internal/session/...",
		"nub/internal/ctxasm/...",
		"nub/internal/mcpc/...",
		"nub/internal/skill/...",
		"nub/internal/tokens/...",
	}
	for _, pkg := range pkgs {
		out, err := exec.Command("go", "list", "-deps", "-f", "{{.ImportPath}}", pkg).CombinedOutput()
		if err != nil {
			// Pakete wie internal/session existieren in M1 noch nicht -> überspringen.
			if strings.Contains(string(out), "matched no packages") {
				continue
			}
			t.Fatalf("go list %s: %v\n%s", pkg, err, out)
		}
		for _, dep := range strings.Split(strings.TrimSpace(string(out)), "\n") {
			if dep == "nub/internal/ui" || strings.HasPrefix(dep, "nub/internal/ui/") {
				t.Errorf("%s transitively imports %s, which violates E-04", pkg, dep)
			}
		}
	}
}