package main

import (
	"context"
	"strings"
	"testing"

	"github.com/novox/mesh-control/internal/inventory"
)

// placementOf is what the mesh holds about where one node is.
func placementOf(t *testing.T, ctx context.Context, inv *inventory.Inventory, name string) inventory.Overlay {
	t.Helper()
	placed, err := inv.Overlays(ctx)
	if err != nil {
		t.Fatal(err)
	}
	for _, one := range placed {
		if one.Name == name {
			return one
		}
	}
	t.Fatalf("%s is not placed at all", name)
	return inventory.Overlay{}
}

// The sibling of `node public-domain`, and the worse one: a placement is three facts declared
// together, so an invocation that said none of them took all three away — the endpoint every other
// machine dials, the site, and the hub. A mesh whose hub was placed that way has no paths left.
func TestPlacingANodeWithNothingSaidDoesNotUnplaceIt(t *testing.T) {
	open := aMesh(t)
	ctx := t.Context()
	if err := overlayPlace(ctx, open.inventory,
		[]string{"anchor", "--endpoint", "198.51.100.10:51820", "--site", "hosting", "--hub"}); err != nil {
		t.Fatal(err)
	}

	err := overlayPlace(ctx, open.inventory, []string{"anchor"})
	if err == nil {
		t.Fatal("saying nothing unplaced the node instead of being refused")
	}
	if !strings.Contains(err.Error(), "--nothing") {
		t.Errorf("the refusal does not say how to mean it: %v", err)
	}

	held := placementOf(t, ctx, open.inventory, "anchor")
	if held.Endpoint != "198.51.100.10:51820" || held.Site != "hosting" || !held.Hub {
		t.Fatalf("the placement was taken away by an invocation that was refused: %+v", held)
	}
}

// Placing a machine with nothing set is a real thing to want — one that roams and opens every path
// itself is exactly that — so it keeps a way to be said, by name.
func TestPlacingANodeWithNothingIsAskedForByName(t *testing.T) {
	open := aMesh(t)
	ctx := t.Context()
	if err := overlayPlace(ctx, open.inventory,
		[]string{"anchor", "--endpoint", "198.51.100.10:51820", "--site", "hosting"}); err != nil {
		t.Fatal(err)
	}
	if err := overlayPlace(ctx, open.inventory, []string{"anchor", "--nothing"}); err != nil {
		t.Fatal(err)
	}
	held := placementOf(t, ctx, open.inventory, "anchor")
	if held.Endpoint != "" || held.Site != "" || held.Hub {
		t.Fatalf("--nothing did not place it with nothing: %+v", held)
	}
}

// Both at once cannot be meant, so neither silently wins.
func TestAPlacementAndNothingTogetherIsRefused(t *testing.T) {
	open := aMesh(t)
	ctx := t.Context()
	if err := overlayPlace(ctx, open.inventory,
		[]string{"anchor", "--site", "hosting", "--nothing"}); err == nil {
		t.Fatal("a placement and --nothing together was accepted")
	}
}