import { afterEach, beforeEach, describe, expect, it } from "bun:test";
import { mkdtemp, rm } from "node:fs/promises";
import { tmpdir } from "node:os";
import { join } from "node:path";
import { config } from "../../src/config.js";
import { LearningOrchestrator } from "../../src/learning/orchestrator.js";
import { SessionLearningStateStore } from "../../src/learning/sessionStateStore.js";
import { MemoryStore } from "../../src/memory/store.js";
import { SessionTranscriptStore } from "../../src/sessions/transcriptStore.js";
import { SessionWorkspaceStore } from "../../src/sessions/workspace-store.js";
import { type OpencodeRuntimeAdapter } from "../../src/runtime/opencode.js";
import { getRuntimeSessionContext } from "../../src/runtime/sessionContext.js";

const owner = { actorKey: "actor-a", projectKey: "personal-actor-a", sessionId: "parent-chat" };
const input = {
  sessionId: owner.sessionId, userMessage: "question", assistantMessage: "answer", toolCallCount: 0,
  requestContext: { ...owner, clientSessionId: owner.sessionId, traceId: "learning-test" },
};
const deferred = () => {
  let resolve!: () => void;
  const promise = new Promise<void>((done) => { resolve = done; });
  return { resolve, promise };
};

describe("learning session lifecycle", () => {
  let base: string;
  let originalAuditPath: string;
  let originalCooldown: number;
  let records: SessionWorkspaceStore;
  let state: SessionLearningStateStore;
  beforeEach(async () => {
    base = await mkdtemp(join(tmpdir(), "tjwater-learning-lifecycle-"));
    originalAuditPath = config.LEARNING_AUDIT_LOG_PATH;
    originalCooldown = config.LEARNING_GATE_TURN_COOLDOWN;
    config.LEARNING_AUDIT_LOG_PATH = join(base, "audit.log");
    config.LEARNING_GATE_TURN_COOLDOWN = 1;
    records = new SessionWorkspaceStore(join(base, "workspaces"));
    state = new SessionLearningStateStore(join(base, "legacy-learning"), records);
  });
  afterEach(async () => {
    config.LEARNING_AUDIT_LOG_PATH = originalAuditPath;
    config.LEARNING_GATE_TURN_COOLDOWN = originalCooldown;
    await rm(base, { recursive: true, force: true });
  });
  const orchestrator = (runtime: object) => new LearningOrchestrator(
    runtime as OpencodeRuntimeAdapter, new MemoryStore(join(base, "memory"), join(base, "memory-backup")),
    new SessionTranscriptStore(join(base, "legacy-transcripts"), records), state,
  );

  it("releases both native helper sessions after a completed review and persists progress in chat", async () => {
    let nextId = 0;
    const removed: string[] = [];
    const finished = deferred();
    const learning = orchestrator({
      createSession: async () => ({ id: `helper-${++nextId}` }), prompt: async () => undefined,
      messages: async (id: string) => [{ info: { role: "assistant" }, parts: [{ type: "text", text: JSON.stringify(
        id === "helper-1" ? { should_review: true, confidence: 1, focus: "memory", reason: "useful" } : { memories: [], skills: [], summary: "reviewed" },
      ) }] }],
      removeSession: async (id: string) => { removed.push(id); if (removed.length === 2) finished.resolve(); },
    });
    await learning.onTurnCompleted(input);
    await finished.promise;
    expect(removed).toEqual(["helper-2", "helper-1"]);
    expect(getRuntimeSessionContext("helper-1")).toBeNull();
    expect(getRuntimeSessionContext("helper-2")).toBeNull();
    expect((await state.read(owner)).lastReviewedTurn).toBe(1);
    expect(records.path(owner, "learning.json")).toContain("/personal/");
  });

  it("cancels a running gate without promoting memory or reviving deleted content", async () => {
    const started = deferred();
    const interrupted = deferred();
    const removed: string[] = [];
    const learning = orchestrator({
      createSession: async () => ({ id: "cancelled-gate" }),
      prompt: async () => { started.resolve(); await interrupted.promise; },
      messages: async () => [{ info: { role: "assistant" }, parts: [{ type: "text", text: '{"should_review":true,"confidence":1,"focus":"memory"}' }] }],
      abortSession: async () => { interrupted.resolve(); },
      removeSession: async (id: string) => { removed.push(id); },
    });
    await learning.onTurnCompleted(input);
    await started.promise;
    await records.markDeleted(owner);
    await learning.cancelSession(owner.sessionId);
    await records.purge(owner);
    expect(removed).toEqual(["cancelled-gate"]);
    expect(getRuntimeSessionContext("cancelled-gate")).toBeNull();
    expect(await records.list(owner, "learning.json")).toEqual([]);
  });

  it("releases the helper when model inference fails", async () => {
    const finished = deferred();
    const removed: string[] = [];
    const learning = orchestrator({
      createSession: async () => ({ id: "failed-gate" }),
      prompt: async () => { throw new Error("model unavailable"); },
      removeSession: async (id: string) => { removed.push(id); finished.resolve(); },
    });
    await learning.onTurnCompleted(input);
    await finished.promise;
    expect(removed).toEqual(["failed-gate"]);
    expect(getRuntimeSessionContext("failed-gate")).toBeNull();
  });
});