package catalogue

import (
	"strings"
	"testing"
)

// Genesis assigns the build agent before the package registry exists (novox/hq ADR 0336, issue 121),
// judged over the real catalogue. Genesis's step 13 was refused with "nothing provides
// \"npm-package-registry\", wanted by build-agent": the forge genesis raises at its packages step is a
// container, not the gitea module, and provides nothing.

// agentBuilt is the build agent as the mesh holds it once built: its image pinned.
func agentBuilt(t *testing.T) Manifest {
	t.Helper()
	agent := catalogueManifest(t, "build-agent")
	built, err := agent.Resolve([]Built{{Name: "server", Kind: ArtifactImage,
		Reference: "mesh-builder@sha256:" + strings.Repeat("a", 64)}})
	if err != nil {
		t.Fatalf("the build agent does not resolve against its own build: %v", err)
	}
	return built
}

func TestGenesisAssignsTheBuildAgentWithNothingProvidingTheRegistry(t *testing.T) {
	agent := agentBuilt(t)
	if !agent.IsOptional("npm-package-registry") {
		t.Fatalf("the build agent's npm-package-registry is hard (ADR 0336 §1): %v", agent.Requires)
	}
	if agent.IsOptional("artifact-store") {
		t.Fatal("the build agent's artifact-store is optional; it stays hard")
	}
	store := map[string][]Provider{"artifact-store": {
		{Node: "anchor", At: "anchor.internal", Module: "distribution", Serves: map[string]any{"port": float64(5000)}}}}
	books := shelf(agent, catalogueManifest(t, "gitea"), catalogueManifest(t, "distribution"))

	// Genesis's node at step 13: the store answers, nothing provides the registry.
	got, err := Resolve(books, []string{"build-agent"}, reachable(), World{Offered: store})
	if err != nil {
		t.Fatalf("assigning the build agent with no registry was refused: %v", err)
	}
	if have := strings.Join(names(got), " "); have != "build-agent" {
		t.Fatalf("assigning the build agent put %s on the machine; nothing is installed for the registry", have)
	}
	if len(got.Absent) != 1 || got.Absent[0] != (Absent{Consumer: "build-agent", Requirement: "npm-package-registry"}) {
		t.Fatalf("the registry is not listed unbound for the build agent: %+v", got.Absent)
	}
	out, err := got.Declaration(Rendering{ArtifactStore: "anchor.internal:5000",
		Needed: map[string]map[string]string{"build-agent": {"broker": "sealed-broker"}}})
	if err != nil {
		t.Fatalf("the build agent does not compose with the registry unbound: %v", err)
	}
	for _, id := range []string{"build-agent." + BoundID("npm-package-registry"), "build-agent." + SecretID("npm-package-registry"),
		"build-agent." + NeedID("genesis-package-registry")} {
		if fileNamed(out, id) != nil {
			t.Errorf("%s was delivered with the registry unbound and no genesis document given", id)
		}
	}

	// The genesis document, once the installer seals it at the packages step (ADR 0336 §3).
	out, err = got.Declaration(Rendering{ArtifactStore: "anchor.internal:5000",
		Needed: map[string]map[string]string{"build-agent": {"broker": "sealed-broker", "genesis-package-registry": "sealed-genesis"}}})
	if err != nil {
		t.Fatal(err)
	}
	doc := fileNamed(out, "build-agent."+NeedID("genesis-package-registry"))
	if doc == nil || doc["sealed"] != "sealed-genesis" || !strings.HasSuffix(doc["path"].(string), "/genesis-package-registry.json") {
		t.Fatalf("the genesis document is not delivered where the agent reads it: %v", doc)
	}

	// The gitea module assigned: the requirement binds, with no act on the build agent (ADR 0336 §2).
	registry := map[string][]Provider{"artifact-store": store["artifact-store"], "npm-package-registry": {
		{Node: "anchor", At: "anchor.internal", Module: "gitea",
			Serves: map[string]any{"port": float64(3000), "scheme": "http", "npm-path": "/api/packages/novox/npm/"}}}}
	bound, err := Resolve(books, []string{"build-agent"}, reachable(), World{Offered: registry})
	if err != nil {
		t.Fatal(err)
	}
	if n := boundFrom(t, bound, "build-agent", "npm-package-registry"); n.Module != "gitea" {
		t.Fatalf("bound to %s", n.Module)
	}
	if len(bound.Absent) != 0 {
		t.Fatalf("the registry is still listed unbound once gitea is assigned: %+v", bound.Absent)
	}
}