package combatturns

import (
	"context"
	"io/fs"
	"strings"
	"testing"
	"time"

	"gitea.maximumdirect.net/eric/notarius/internal/framework/llm"
	"gitea.maximumdirect.net/eric/scriptorium"
)

func TestRegisterPromptAssetsAndPrepareCombatPrompt(t *testing.T) {
	registry := llm.NewAssetRegistry()
	if err := RegisterPromptAssets(registry); err != nil {
		t.Fatalf("RegisterPromptAssets() error = %v", err)
	}
	schemaFS, err := registry.SchemaFS()
	if err != nil {
		t.Fatal(err)
	}
	if _, err := fs.ReadFile(schemaFS, "dnd_combat_turns_llm.v1.json"); err != nil {
		t.Fatalf("response schema asset: %v", err)
	}
	hash, err := scriptoriumPromptMetadata()
	if err != nil || !strings.HasPrefix(hash, "sha256:") {
		t.Fatalf("scriptoriumPromptMetadata() = %q, %v; want digest", hash, err)
	}
}

func TestScriptoriumPromptPreparesRequiredInputs(t *testing.T) {
	registry := llm.NewAssetRegistry()
	if err := RegisterPromptAssets(registry); err != nil {
		t.Fatalf("RegisterPromptAssets() error = %v, want nil", err)
	}
	options, err := registry.ScriptoriumOptions()
	if err != nil {
		t.Fatalf("ScriptoriumOptions() error = %v, want nil", err)
	}
	options = append(options, scriptorium.WithProfiles(scriptorium.OpenAICompatibleProfile(scriptorium.OpenAICompatibleProfileConfig{
		ID: "combat-test-profile", Endpoint: "http://127.0.0.1:1/v1", Model: "combat-test-model",
	})))
	engine, err := scriptorium.NewEngine(scriptorium.Config{Timeout: time.Second}, options...)
	if err != nil {
		t.Fatalf("NewEngine() error = %v, want nil", err)
	}
	transcript := `{"units":[1]}`
	prepared, err := engine.Prepare(context.Background(), scriptorium.RunRequest{
		PromptID: PromptID, PromptVersion: SchemaVersion, ProfileID: "combat-test-profile",
		Inputs: map[string]scriptorium.ArtifactRef{
			"transcript": scriptorium.InlineWithURI("file:///session.json", transcript),
			"players":    scriptorium.Inline("Dana: Mira"),
			"party":      scriptorium.Inline("Mira: ranger"),
			"glossary":   scriptorium.Inline("Greencloak: title"),
			"npcs":       scriptorium.Inline(`{"npcs":[]}`),
		},
	})
	if err != nil {
		t.Fatalf("Prepare() error = %v, want nil", err)
	}
	if prepared.PromptID != PromptID || prepared.OutputContract.SchemaPath != "dnd_combat_turns_llm.v1.json" {
		t.Fatalf("prepared prompt = %#v, want combat prompt identity and schema", prepared)
	}
	for index, want := range []struct {
		role   string
		cached bool
		marker string
	}{
		{role: "system", marker: "Dungeons & Dragons gameplay transcripts"},
		{role: "user", marker: "Transcript units are the only evidence"},
		{role: "user", cached: true, marker: "most specific supported in-world"},
		{role: "user", cached: true},
		{role: "user", cached: true},
		{role: "user", marker: "combat-turn artifacts"},
		{role: "user", cached: true, marker: "turn_kind"},
		{role: "user"},
	} {
		if index >= len(prepared.Messages) {
			t.Fatalf("prepared prompt has %d messages, want at least %d", len(prepared.Messages), index+1)
		}
		message := prepared.Messages[index]
		if message.Role != want.role {
			t.Errorf("message %d role = %q, want %q", index, message.Role, want.role)
		}
		if want.cached {
			if message.CacheControl == nil || message.CacheControl.Type != scriptorium.CacheControlEphemeral {
				t.Errorf("message %d cache control = %#v, want ephemeral", index, message.CacheControl)
			}
		} else if message.CacheControl != nil {
			t.Errorf("message %d cache control = %#v, want nil", index, message.CacheControl)
		}
		if want.marker != "" && !strings.Contains(message.Content, want.marker) {
			t.Errorf("message %d content does not contain purpose marker %q", index, want.marker)
		}
	}
	if len(prepared.Messages) != 8 {
		t.Fatalf("prepared prompt has %d messages, want 8", len(prepared.Messages))
	}
	if references := prepared.Messages[3].Content; !strings.Contains(references, "Dana: Mira") || !strings.Contains(references, "Mira: ranger") || !strings.Contains(references, "Greencloak: title") {
		t.Fatalf("campaign references message = %q, want rendered reference inputs", references)
	}
	if registry := prepared.Messages[4].Content; !strings.Contains(registry, `{"npcs":[]}`) {
		t.Fatalf("NPC registry message = %q, want registry input", registry)
	}
	if final := prepared.Messages[7].Content; !strings.Contains(final, transcript) {
		t.Fatalf("final message = %q, want transcript", final)
	}
}