package itemevents

import (
	"reflect"
	"strings"
	"testing"

	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd"
)

func TestConstructorSpecOptionsAndMetadata(t *testing.T) {
	if _, err := New(nil, Options{}); err == nil || !strings.Contains(err.Error(), "LLM client") {
		t.Fatalf("New(nil) error = %v", err)
	}
	if _, err := New(&fakeItemEventsLLMClient{}, Options{}, contracts.ReferenceSet{}, contracts.ReferenceSet{}); err == nil || !strings.Contains(err.Error(), "at most one reference set") {
		t.Fatalf("New() error = %v", err)
	}
	want := pipeline.ModuleSpec{
		Key: Key, Stage: pipeline.StageExtract, ExecutionClass: contracts.ExecutionClassLLMBacked, Requires: []string{"chunks", "source.transcript"}, Provides: []string{"dnd.item_events"}, ArtifactKind: dnd.ItemEventListKind,
		ReferenceSlots: []contracts.ReferenceSlot{
			{Name: "glossary", Description: referenceSlotDescriptions.Glossary, AcceptedMediaTypes: []string{"application/json", "application/x-yaml", "application/yaml", "text/markdown", "text/plain"}},
			{Name: "party", Description: referenceSlotDescriptions.Party, AcceptedMediaTypes: []string{"application/json", "application/x-yaml", "application/yaml", "text/markdown", "text/plain"}},
			{Name: "players", Description: referenceSlotDescriptions.Players, AcceptedMediaTypes: []string{"application/json", "application/x-yaml", "application/yaml", "text/markdown", "text/plain"}},
			{Name: "roster", Description: referenceSlotDescriptions.Roster, AcceptedMediaTypes: []string{"application/json", "application/x-yaml", "application/yaml", "text/markdown", "text/plain"}},
		},
	}
	if got := ModuleSpec(); !reflect.DeepEqual(got, want) {
		t.Fatalf("ModuleSpec() = %#v, want %#v", got, want)
	}
	if _, err := DecodeOptions(map[string]any{"unexpected": true}); err == nil || !strings.Contains(err.Error(), "unknown option") {
		t.Fatalf("DecodeOptions() error = %v", err)
	}
	registry := pipeline.NewExtractorRegistry()
	if err := Register(registry); err != nil {
		t.Fatal(err)
	}
	if got, ok := registry.Spec(Key); !ok || !reflect.DeepEqual(got, want) {
		t.Fatalf("registry spec = %#v, %t", got, ok)
	}

	extractor := newExtractor(t, &fakeItemEventsLLMClient{})
	metadata := extractor.ManifestMetadata()
	for key, want := range map[string]string{
		"prompt_id": PromptID, "prompt_version": SchemaVersion, "response_schema_key": string(ResponseSchemaKey), "response_schema_id": ResponseSchemaID,
		"response_schema_name": ResponseSchemaName, "response_schema_version": SchemaVersion, "mapping_policy": mappingPolicy,
	} {
		if metadata[key] != want {
			t.Fatalf("metadata[%q] = %#v, want %q", key, metadata[key], want)
		}
	}
	for _, key := range []string{"prompt_sha256", "response_schema_sha256"} {
		if value, ok := metadata[key].(string); !ok || !strings.HasPrefix(value, "sha256:") {
			t.Fatalf("metadata[%q] = %#v", key, metadata[key])
		}
	}
	if got := extractor.CheckpointFingerprints(); !reflect.DeepEqual(got, []pipeline.CheckpointFingerprint{
		{Name: "prompt", Value: metadata["prompt_sha256"].(string)},
		{Name: "response_schema", Value: metadata["response_schema_sha256"].(string)},
		{Name: "mapping_policy", Value: mappingPolicy},
	}) {
		t.Fatalf("CheckpointFingerprints() = %#v", got)
	}
}