import { describe, it, expect } from "vitest";
import { ConversationStore } from "../src/conversations/store.js";
import { ChatService } from "../src/agent/chat-service.js";
import type { OllamaClient, OllamaMessage } from "../src/llm/ollama.js";
import type { Guard } from "../src/agent/types.js";
import { createLogger } from "../src/audit/log.js";

const log = createLogger("silent");
const allowGuard: Guard = { authorize: () => ({ allowed: true }) };

describe("ConversationStore", () => {
  it("crée, ajoute, relit dans l'ordre et liste par récence", () => {
    const s = new ConversationStore(":memory:");
    const a = s.create("api:owner", "Bonjour CHLOVA", 1000);
    s.append(a, "user", "Bonjour CHLOVA", 1000);
    s.append(a, "assistant", "Salut", 1001);
    const b = s.create("api:owner", "Autre sujet", 2000);
    s.append(b, "user", "Autre sujet", 2000);

    expect(s.ownerOf(a)).toBe("api:owner");
    expect(s.messages(a).map((m) => m.role)).toEqual(["user", "assistant"]);
    // b plus récent (updated_at) → en tête de liste.
    expect(s.list("api:owner").map((c) => c.id)).toEqual([b, a]);
    expect(s.list("api:owner")[0]!.title).toBe("Autre sujet");
    s.close();
  });

  it("recent() borne et conserve l'ordre chronologique", () => {
    const s = new ConversationStore(":memory:");
    const c = s.create("u", "x", 0);
    for (let i = 0; i < 30; i++) s.append(c, i % 2 ? "assistant" : "user", `m${i}`, i);
    const recent = s.recent(c, 5);
    expect(recent).toHaveLength(5);
    expect(recent.map((m) => m.content)).toEqual(["m25", "m26", "m27", "m28", "m29"]);
    s.close();
  });

  it("isole les conversations par acteur", () => {
    const s = new ConversationStore(":memory:");
    s.create("a", "x");
    s.create("b", "y");
    expect(s.list("a")).toHaveLength(1);
    expect(s.list("b")).toHaveLength(1);
    s.close();
  });
});

describe("ChatService mémoire multi-tour", () => {
  // Client factice : snapshot (copie) des messages AU MOMENT de l'appel — le
  // tableau réel est muté ensuite par la boucle (push assistant), donc on copie.
  let lastLen = 0;
  let lastContents: string[] = [];
  const client = {
    chat: async (req: { messages: OllamaMessage[] }) => {
      lastLen = req.messages.length;
      lastContents = req.messages.map((m) => m.content);
      return { role: "assistant", content: "ok" } as OllamaMessage;
    },
  } as unknown as OllamaClient;

  it("persiste et rejoue l'historique au tour suivant", async () => {
    const store = new ConversationStore(":memory:");
    const svc = new ChatService({
      client,
      tools: [],
      guard: allowGuard,
      systemPrompt: "SYS",
      logger: log,
      store,
    });

    const r1 = await svc.handle("api:owner", "premier");
    expect(r1.conversationId).toBeTruthy();
    // Tour 1 : system + user = 2 messages, pas d'historique.
    expect(lastLen).toBe(2);

    const r2 = await svc.handle("api:owner", "second", r1.conversationId!);
    expect(r2.conversationId).toBe(r1.conversationId);
    // Tour 2 : system + (user1, assistant1) + user2 = 4 messages.
    expect(lastLen).toBe(4);
    expect(lastContents).toEqual(["SYS", "premier", "ok", "second"]);

    // 4 messages persistés (2 user + 2 assistant).
    expect(store.messages(r1.conversationId!)).toHaveLength(4);
    store.close();
  });

  it("refuse une conversation d'un autre acteur", async () => {
    const store = new ConversationStore(":memory:");
    const svc = new ChatService({ client, tools: [], guard: allowGuard, systemPrompt: "S", logger: log, store });
    const r = await svc.handle("alice", "coucou");
    await expect(svc.handle("bob", "intrus", r.conversationId!)).rejects.toThrow();
    store.close();
  });
});