package main

import (
	"os"
	"path/filepath"
	"strings"
	"testing"

	"github.com/novox/mesh-controller/internal/catalogue"
)

// One accept for a provider reaches every consumer that binds the provision from it, and each consumer's send
// places it; the per-pair form naming a consumer is refused for such a provision, naming the provider's form; a
// value the mesh made before the rule is not placed (novox/hq ADR 0337 §2, §3, §4, issue 164, issue 165). Needs the
// store (MESH_TEST_POSTGRES), and is named in testdata/store-tests.
func TestOneAcceptForAProviderIsPlacedForEveryConsumer(t *testing.T) {
	open := aMesh(t)
	ctx := t.Context()
	// Before the rule: tv's offer said nothing of its credential, and the send made one per pair.
	register(t, open, catalogue.Manifest{Module: "tv", Version: "1",
		Provides: []catalogue.Offer{{Name: "tv-api", Scope: catalogue.ScopeMesh}}})
	for _, m := range []string{"requests", "indexer"} {
		register(t, open, catalogue.Manifest{Module: m, Version: "1", Requires: []string{"tv-api"},
			Secrets: map[string]string{"tv-api": "/var/lib/mesh/" + m + "/tv-api.secret"}})
	}
	for _, a := range [][2]string{{"anchor", "tv"}, {"laptop", "requests"}, {"laptop", "indexer"}} {
		if _, err := assign(ctx, open, a[0], a[1]); err != nil {
			t.Fatal(err)
		}
	}
	placed := func(module string) bool {
		t.Helper()
		plan, settings, err := planFor(ctx, open, "laptop")
		if err != nil {
			t.Fatalf("laptop was refused: %v", err)
		}
		declared, err := declarationFor(ctx, open, "laptop", plan, settings)
		if err != nil {
			t.Fatalf("laptop did not compose: %v", err)
		}
		for _, r := range declared.Resources {
			if r["path"] == "/var/lib/mesh/"+module+"/tv-api.secret" && r["sealed"] != nil {
				return true
			}
		}
		return false
	}

	if !placed("requests") || !placed("indexer") {
		t.Fatal("before the rule, the send made and placed a credential per pair")
	}
	// The offer now says only a person gives it: the values the mesh made are not placed.
	register(t, open, catalogue.Manifest{Module: "tv", Version: "2",
		Provides: []catalogue.Offer{{Name: "tv-api", Scope: catalogue.ScopeMesh,
			Credential: &catalogue.OfferCredential{IssuedBy: catalogue.IssuedOutside}}}})
	if placed("requests") || placed("indexer") {
		t.Fatal("a credential nobody gave was placed")
	}

	// The per-pair form is refused, naming the provider's form, and reads nothing.
	file := filepath.Join(t.TempDir(), "key")
	if err := os.WriteFile(file, []byte("the app's key\n"), 0o600); err != nil {
		t.Fatal(err)
	}
	err := secretCommand(ctx, []string{"accept", "laptop", "requests", "tv-api", "--provider", "anchor", "--from", file})
	if err == nil || !strings.Contains(err.Error(), "secret accept anchor tv tv-api") {
		t.Fatalf("the per-pair form was not refused naming the provider's: %v", err)
	}

	consumers, unresolved, err := consumersFrom(ctx, open, "anchor", "tv", "tv-api")
	if err != nil || len(unresolved) != 0 {
		t.Fatalf("the consumers of tv on anchor could not be found: %v %v", err, unresolved)
	}
	if len(consumers) != 2 {
		t.Fatalf("the consumers of tv on anchor are %+v; want requests and indexer on laptop", consumers)
	}
	if _, err := open.inventory.AcceptSecretForProvision(ctx, "tv-api", "anchor", "tv", "the app's key", consumers); err != nil {
		t.Fatal(err)
	}
	if !placed("requests") || !placed("indexer") {
		t.Fatal("the value given once for the provider was not placed for every consumer")
	}
}