package cli

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

	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd"
	interactioncodec "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/codec/npcinteractions"
	interactionextract "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/extract/npcinteractions"
	npcextract "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/extract/npcs"
	interactionnormalize "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/normalize/npcinteractions"
	npcnormalize "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/normalize/npcs"
)

func TestProductionNPCInteractionPipelineResolvesAndPrepares(t *testing.T) {
	components := productionTestComponents(t)
	resolved, err := pipeline.ResolvePipeline(npcInteractionProfile(pipeline.GeneratedReference("npcs", "npcs")), pipeline.ResolveOptions{}, catalogFromRegistries(components.registries))
	if err != nil {
		t.Fatalf("ResolvePipeline() error = %v", err)
	}
	if len(resolved.Steps) != 2 || len(resolved.Steps[1].ArtifactLanes) != 1 {
		t.Fatalf("resolved pipeline = %#v", resolved)
	}
	lane := resolved.Steps[1].ArtifactLanes[0]
	if lane.ArtifactKind != dnd.NPCInteractionListKind || lane.Extract.Module != interactionextract.Key || lane.Normalize.Module != interactionnormalize.Key {
		t.Fatalf("interaction lane = %#v", lane)
	}
	for _, bindings := range [][]pipeline.ReferenceBinding{lane.ExtractReferences.Bindings, lane.NormalizeReferences.Bindings} {
		if len(bindings) != 1 || bindings[0].SlotName != "npcs" || bindings[0].Artifact == nil || bindings[0].Artifact.Step != "npcs" || bindings[0].Artifact.Lane != "npcs" {
			t.Fatalf("generated bindings = %#v", bindings)
		}
	}
	if _, err := pipeline.Prepare(resolved, components.registries, pipeline.ModuleDependencies{LLM: &productionFakeLLMClient{}}); err != nil {
		t.Fatalf("Prepare() error = %v", err)
	}

	catalog := catalogFromRegistries(components.registries)
	codecSpec, ok := catalog.ArtifactCodecs.Spec(dnd.NPCInteractionListKind)
	if !ok || codecSpec.Schema.ID != interactioncodec.SchemaID || codecSpec.Schema.Version != interactioncodec.SchemaVersion {
		t.Fatalf("NPC interaction codec spec = %#v", codecSpec)
	}
}

func TestProductionNPCInteractionReferencesRequireEarlierCompatibleProducer(t *testing.T) {
	components := productionTestComponents(t)
	catalog := catalogFromRegistries(components.registries)
	laterProfile := npcInteractionProfile(pipeline.GeneratedReference("npcs", "npcs"))
	laterProfile.Steps[0].ID = "seed"
	laterProfile.Steps[0].Artifacts["seed"] = laterProfile.Steps[0].Artifacts["npcs"]
	delete(laterProfile.Steps[0].Artifacts, "npcs")
	laterProfile.Steps = append(laterProfile.Steps, pipeline.PipelineStepProfile{ID: "future", Artifacts: map[string]pipeline.ArtifactLaneProfile{
		"npcs": {Extract: pipeline.Binding(npcextract.Key), Normalize: pipeline.Binding(npcnormalize.Key)},
	}})
	laterProfile.Steps[1].References["npcs"] = pipeline.GeneratedReference("future", "npcs")
	tests := []struct {
		name    string
		profile pipeline.PipelineProfile
		want    string
	}{
		{name: "missing", profile: npcInteractionProfile(pipeline.ReferenceSource{}), want: "source must not be empty"},
		{name: "same step", profile: npcInteractionProfile(pipeline.GeneratedReference("interactions", "interactions")), want: "earlier step"},
		{name: "later step", profile: laterProfile, want: "earlier step"},
		{name: "wrong artifact kind", profile: npcInteractionProfile(pipeline.GeneratedReference("npcs", "npcs")), want: "does not accept artifact kind"},
	}
	tests[3].profile.Steps[0].Artifacts["npcs"] = pipeline.ArtifactLaneProfile{Extract: pipeline.Binding("dnd/spells")}
	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			_, err := pipeline.ResolvePipeline(test.profile, pipeline.ResolveOptions{}, catalog)
			if err == nil || !strings.Contains(err.Error(), test.want) {
				t.Fatalf("ResolvePipeline() error = %v, want %q", err, test.want)
			}
		})
	}
}

func TestProductionNPCInteractionReferencesRejectIncompatibleExternalRegistries(t *testing.T) {
	components := productionTestComponents(t)
	catalog := catalogFromRegistries(components.registries)
	root := t.TempDir()
	for _, test := range []struct {
		name    string
		file    string
		content string
		prepare bool
		want    string
	}{
		{name: "media type", file: "registry.txt", content: "not JSON", want: "media type"},
		{name: "artifact schema", file: "registry.json", content: `{"npcs":[{"name":"missing required fields"}]}`, prepare: true, want: "NPC registry"},
	} {
		t.Run(test.name, func(t *testing.T) {
			path := filepath.Join(root, test.file)
			if err := os.WriteFile(path, []byte(test.content), 0o600); err != nil {
				t.Fatal(err)
			}
			resolved, err := pipeline.ResolvePipeline(npcInteractionProfile(pipeline.ExternalReference(path)), pipeline.ResolveOptions{}, catalog)
			if err != nil {
				t.Fatalf("ResolvePipeline() error = %v", err)
			}
			materialized, _, err := pipeline.MaterializeReferences(resolved, catalog, pipeline.ReferenceMaterializationOptions{})
			if !test.prepare {
				if err == nil || !strings.Contains(err.Error(), test.want) {
					t.Fatalf("MaterializeReferences() error = %v, want %q", err, test.want)
				}
				return
			}
			if err != nil {
				t.Fatalf("MaterializeReferences() error = %v", err)
			}
			if _, err := pipeline.Prepare(materialized, components.registries, pipeline.ModuleDependencies{LLM: &productionFakeLLMClient{}}); err == nil || !strings.Contains(err.Error(), test.want) {
				t.Fatalf("Prepare() error = %v, want %q", err, test.want)
			}
		})
	}
}

func npcInteractionProfile(reference pipeline.ReferenceSource) pipeline.PipelineProfile {
	profile := pipeline.PipelineProfile{
		ID:     "dnd-npc-interactions",
		Input:  pipeline.Binding("seriatim"),
		Chunk:  pipeline.ModuleBinding{Module: "generic", Options: map[string]any{"max_units": 1}},
		Output: pipeline.Binding("json"),
		Steps: []pipeline.PipelineStepProfile{
			{ID: "npcs", Artifacts: map[string]pipeline.ArtifactLaneProfile{
				"npcs": {Extract: pipeline.Binding(npcextract.Key), Normalize: pipeline.Binding(npcnormalize.Key)},
			}},
			{ID: "interactions", References: map[string]pipeline.ReferenceSource{"npcs": reference}, Artifacts: map[string]pipeline.ArtifactLaneProfile{
				"interactions": {Extract: pipeline.Binding(interactionextract.Key), Normalize: pipeline.Binding(interactionnormalize.Key)},
			}},
		},
	}
	return profile
}