package main

import (
	"strings"
	"testing"
)

// **A read-shaped invocation is never a destructive write.**
//
// `node public-domain anchor` used to clear the domain. It reads like a question — it is what
// anybody types to find out what the answer is — and it silently took every routed name the node
// had. There is no output that makes up for that: by the time it prints, the fact is gone.
func TestAskingForANodesPublicDomainDoesNotTakeItAway(t *testing.T) {
	open := aMesh(t)
	ctx := t.Context()
	if err := open.inventory.SetPublicDomain(ctx, "anchor", "example.test"); err != nil {
		t.Fatal(err)
	}

	if err := publicDomain(ctx, open.inventory, []string{"anchor"}); err != nil {
		t.Fatal(err)
	}
	domain, err := open.inventory.PublicDomainOf(ctx, "anchor")
	if err != nil {
		t.Fatal(err)
	}
	if domain != "example.test" {
		t.Fatalf("asking what the domain is took it away: %q", domain)
	}
}

// Clearing is a real thing to want — a machine that stops facing the outside composes no names —
// so it keeps a way to be said. What it stops being is what happens when nothing was said.
func TestClearingANodesPublicDomainIsAskedForByName(t *testing.T) {
	open := aMesh(t)
	ctx := t.Context()
	if err := open.inventory.SetPublicDomain(ctx, "anchor", "example.test"); err != nil {
		t.Fatal(err)
	}
	if err := publicDomain(ctx, open.inventory, []string{"anchor", "--clear"}); err != nil {
		t.Fatal(err)
	}
	domain, err := open.inventory.PublicDomainOf(ctx, "anchor")
	if err != nil {
		t.Fatal(err)
	}
	if domain != "" {
		t.Fatalf("--clear did not clear it: %q", domain)
	}
}

// A domain sets it, as it always did.
func TestGivingANodeAPublicDomainSetsIt(t *testing.T) {
	open := aMesh(t)
	ctx := t.Context()
	if err := publicDomain(ctx, open.inventory, []string{"anchor", "example.test"}); err != nil {
		t.Fatal(err)
	}
	domain, err := open.inventory.PublicDomainOf(ctx, "anchor")
	if err != nil {
		t.Fatal(err)
	}
	if domain != "example.test" {
		t.Fatalf("got %q", domain)
	}
}

// A domain and --clear say opposite things. Refused rather than one of them silently winning.
func TestADomainAndClearTogetherIsRefused(t *testing.T) {
	open := aMesh(t)
	ctx := t.Context()
	if err := open.inventory.SetPublicDomain(ctx, "anchor", "example.test"); err != nil {
		t.Fatal(err)
	}
	err := publicDomain(ctx, open.inventory, []string{"anchor", "other.test", "--clear"})
	if err == nil {
		t.Fatal("a domain and --clear together were accepted")
	}
	if !strings.Contains(err.Error(), "not both") {
		t.Fatalf("the refusal does not say why: %v", err)
	}
	// And neither half happened.
	domain, err := open.inventory.PublicDomainOf(ctx, "anchor")
	if err != nil {
		t.Fatal(err)
	}
	if domain != "example.test" {
		t.Fatalf("a refused command changed something: %q", domain)
	}
}

// Asking about a name the mesh has never heard of is a refusal, not "it has no public domain" —
// which is true of that name and says nothing.
func TestAskingAboutAMachineTheMeshHasNeverHeardOfIsRefused(t *testing.T) {
	open := aMesh(t)
	if err := publicDomain(t.Context(), open.inventory, []string{"nowhere"}); err == nil {
		t.Fatal("a name the mesh does not know was answered as if it were a machine")
	}
}