import assert from "node:assert/strict";
import { spawn } from "node:child_process";
import crypto from "node:crypto";
import fs from "node:fs";
import os from "node:os";
import path from "node:path";
import test from "node:test";
import { AssistantManager, assistantKeyFor, parseAssistantActions, parseWorkerResult } from "../src/acp/assistant-manager.js";
import { parseConfig } from "../src/config.js";
import { DurableSessionStore } from "../src/core/durable-session-store.js";
import { ProposalStore } from "../src/core/proposal-store.js";
import { BotProfileResolver } from "../src/roles/role-registry.js";

const fixture = path.resolve("test/fixtures/fake-acp-agent.mjs");
const CHAT_KEY = "webhook:chat-1";
const CONVERSATION_KEY = assistantKeyFor(CHAT_KEY, "user-1");

interface Harness {
  home: string;
  workspace: string;
  store: DurableSessionStore;
  proposals: ProposalStore;
  manager: AssistantManager;
  events: { chatKey: string; text: string }[];
  logFile: string;
}

async function createHarness(options: { initialize?: boolean; agentEnv?: Record<string, string> } = {}): Promise<Harness> {
  const home = await fs.promises.mkdtemp(path.join(os.tmpdir(), "gori-assistant-home-"));
  const workspace = await fs.promises.mkdtemp(path.join(os.tmpdir(), "gori-assistant-ws-"));
  const logFile = path.join(home, "fake-acp.log");
  const config = parseConfig({
    configVersion: 3,
    bot: { id: "test-bot", workspace, persona: "", agent: { id: "fake", command: process.execPath, args: [fixture], env: { FAKE_ACP_LOG: logFile, ...options.agentEnv } }, permissions: { mode: "deny" } },
    gateway: { platform: { type: "webhook", secret: "secret" } },
    runtime: { acp: { promptTimeoutMs: 10_000, cancelGraceMs: 200 } }
  });
  const identity = { botId: "test-bot", platform: "webhook" };
  const store = new DurableSessionStore(path.join(home, "state", "acp-sessions.json"), identity);
  const proposals = new ProposalStore(path.join(home, "state", "proposals.json"), identity);
  await store.open();
  await proposals.open();
  const events: { chatKey: string; text: string }[] = [];
  const manager = new AssistantManager(config.runtime.acp, new BotProfileResolver(config).bot, store, proposals, {
    assistantWorkspaceHome: home,
    allowUnverifiedAssistantAgent: true
  });
  manager.setEventSink(async (chatKey, text) => { events.push({ chatKey, text }); });
  if (options.initialize !== false) await manager.initialize();
  return { home, workspace, store, proposals, manager, events, logFile };
}

async function reopenManager(harness: Harness): Promise<void> {
  await harness.manager.shutdown().catch(() => undefined);
  await harness.proposals.close().catch(() => undefined);
  await harness.store.close().catch(() => undefined);
  const identity = { botId: "test-bot", platform: "webhook" };
  harness.store = new DurableSessionStore(path.join(harness.home, "state", "acp-sessions.json"), identity);
  harness.proposals = new ProposalStore(path.join(harness.home, "state", "proposals.json"), identity);
  await harness.store.open();
  await harness.proposals.open();
  const config = parseConfig({
    configVersion: 3,
    bot: { id: "test-bot", workspace: harness.workspace, persona: "", agent: { id: "fake", command: process.execPath, args: [fixture], env: { FAKE_ACP_LOG: harness.logFile } }, permissions: { mode: "deny" } },
    gateway: { platform: { type: "webhook", secret: "secret" } },
    runtime: { acp: { promptTimeoutMs: 10_000, cancelGraceMs: 200 } }
  });
  harness.manager = new AssistantManager(config.runtime.acp, new BotProfileResolver(config).bot, harness.store, harness.proposals, {
    assistantWorkspaceHome: harness.home,
    allowUnverifiedAssistantAgent: true
  });
  harness.manager.setEventSink(async (chatKey, text) => { harness.events.push({ chatKey, text }); });
  await harness.manager.initialize();
}

async function closeHarness(harness: Harness): Promise<void> {
  await harness.manager.shutdown().catch(() => undefined);
  await harness.proposals.close().catch(() => undefined);
  await harness.store.close().catch(() => undefined);
  await fs.promises.rm(harness.home, { recursive: true, force: true });
  await fs.promises.rm(harness.workspace, { recursive: true, force: true });
}

const request = (text: string, userId = "user-1") => ({ platform: "webhook", chatId: "chat-1", userId, text });

async function waitFor(condition: () => boolean, timeoutMs = 8_000): Promise<void> {
  const deadline = Date.now() + timeoutMs;
  while (!condition()) {
    if (Date.now() > deadline) throw new Error("condition not met before timeout");
    await new Promise((resolve) => setTimeout(resolve, 10));
  }
}

function readLog(logFile: string): { method: string; sessionId?: string; cwd?: string; text?: string }[] {
  if (!fs.existsSync(logFile)) return [];
  return fs.readFileSync(logFile, "utf8").trim().split("\n").filter(Boolean).map((line) => JSON.parse(line) as { method: string });
}

test("create proposal stays proposed until confirm; confirm starts the worker without waiting for it", async () => {
  const harness = await createHarness();
  try {
    const created = await harness.manager.prompt(request("create proposal: hang"));
    assert.equal(created.mode, "assistant");
    const [proposal] = harness.proposals.list();
    assert.ok(proposal);
    assert.equal(proposal.status, "proposed");
    assert.equal(proposal.ownerChatKey, CHAT_KEY);
    assert.equal(readLog(harness.logFile).filter((entry) => entry.method === "session/new" && entry.cwd === harness.workspace).length, 0);
    assert.ok(harness.store.getBinding(CONVERSATION_KEY));

    await harness.manager.prompt(request("confirm"));
    const working = harness.proposals.get(proposal.id)!;
    assert.equal(working.status, "working");
    assert.ok(working.confirmedAt);
    assert.ok(working.startedAt);
    await waitFor(() => Boolean(harness.proposals.get(proposal.id)!.workerProcessGroup));
    assert.equal(harness.proposals.get(proposal.id)!.status, "working");

    await harness.manager.prompt(request("stop"));
    const stopped = harness.proposals.get(proposal.id)!;
    assert.equal(stopped.status, "cancelled");
    assert.equal(stopped.workerProcessGroup, undefined);
    assert.ok(stopped.finishedAt);
  } finally {
    await closeHarness(harness);
  }
});

test("stop does not deadlock while a worker result is waiting to settle", async () => {
  const gateFile = path.join(os.tmpdir(), `gori-worker-gate-${crypto.randomUUID()}`);
  const harness = await createHarness({ agentEnv: { FAKE_ACP_WORKER_GATE_FILE: gateFile } });
  try {
    await harness.manager.prompt(request("create proposal: succeed"));
    const proposal = harness.proposals.list()[0]!;
    await harness.manager.prompt(request("confirm"));
    await waitFor(() => readLog(harness.logFile).some((entry) => entry.method === "session/prompt" && entry.text?.startsWith("Execute this confirmed proposal")));

    type Scheduler = <T>(operation: () => Promise<T> | T) => Promise<T>;
    const internals = harness.manager as unknown as { scheduler: Scheduler };
    const original = internals.scheduler.bind(harness.manager);
    let intercepted = false;
    let notifySettle!: () => void;
    let startSettle: (() => Promise<unknown>) | undefined;
    const settleReached = new Promise<void>((resolve) => { notifySettle = resolve; });
    internals.scheduler = <T>(operation: () => Promise<T> | T): Promise<T> => {
      if (!intercepted) {
        intercepted = true;
        return new Promise<T>((resolve, reject) => {
          notifySettle();
          startSettle = () => original(operation).then(resolve, reject);
        });
      }
      return original(operation);
    };

    fs.writeFileSync(gateFile, "go\n", { mode: 0o600 });
    await settleReached;
    const stopped = harness.manager.stop("webhook", "chat-1", "user-1");
    assert.ok(startSettle);
    void startSettle();
    assert.equal(await stopped, true);
    await waitFor(() => harness.proposals.get(proposal.id)!.status === "cancelled");
    assert.equal(harness.proposals.get(proposal.id)!.status, "cancelled");
  } finally {
    await fs.promises.rm(gateFile, { force: true });
    await closeHarness(harness);
  }
});

test("SUCCESS waits for user confirmation and never auto-completes or auto-starts the next proposal", async () => {
  const harness = await createHarness();
  try {
    await harness.manager.prompt(request("create proposal: succeed"));
    const first = harness.proposals.list()[0]!;
    await harness.manager.prompt(request("confirm"));
    await waitFor(() => harness.proposals.get(first.id)!.status === "awaiting_user_confirmation");
    assert.equal(harness.proposals.get(first.id)!.pending?.kind, "success");
    assert.equal(harness.proposals.get(first.id)!.finishedAt, undefined);

    await harness.manager.prompt(request("create proposal: succeed"));
    const second = harness.proposals.list().find((proposal) => proposal.id !== first.id)!;
    await harness.manager.prompt(request("confirm"));
    assert.equal(harness.proposals.get(second.id)!.status, "queued");
    assert.equal(harness.proposals.get(first.id)!.status, "awaiting_user_confirmation");

    await harness.manager.prompt(request("confirm"));
    assert.equal(harness.proposals.get(first.id)!.status, "completed");
    assert.ok(harness.proposals.get(first.id)!.finishedAt);
    assert.equal(harness.proposals.get(second.id)!.status, "queued");

    await harness.manager.prompt(request("start next"));
    assert.equal(harness.proposals.get(second.id)!.status, "working");
    await waitFor(() => harness.proposals.get(second.id)!.status === "awaiting_user_confirmation");
    await harness.manager.prompt(request("confirm"));
    assert.equal(harness.proposals.get(second.id)!.status, "completed");
  } finally {
    await closeHarness(harness);
  }
});

test("FAILED requires confirmation; confirm ends it and confirm retry restarts a working worker", async () => {
  const harness = await createHarness();
  try {
    await harness.manager.prompt(request("create proposal: fail"));
    const first = harness.proposals.list()[0]!;
    await harness.manager.prompt(request("confirm"));
    await waitFor(() => harness.proposals.get(first.id)!.status === "awaiting_user_confirmation");
    assert.equal(harness.proposals.get(first.id)!.pending?.kind, "failure");
    await harness.manager.prompt(request("confirm"));
    assert.equal(harness.proposals.get(first.id)!.status, "failed");
    assert.ok(harness.proposals.get(first.id)!.finishedAt);

    await harness.manager.prompt(request("create proposal: fail"));
    const second = harness.proposals.list().find((proposal) => proposal.id !== first.id)!;
    await harness.manager.prompt(request("confirm"));
    await waitFor(() => harness.proposals.get(second.id)!.status === "awaiting_user_confirmation");
    await harness.manager.prompt(request("confirm retry"));
    assert.equal(harness.proposals.get(second.id)!.status, "working");
    await waitFor(() => harness.proposals.get(second.id)!.status === "awaiting_user_confirmation");
    assert.equal(harness.proposals.get(second.id)!.pending?.kind, "failure");
    await harness.manager.prompt(request("confirm"));
    assert.equal(harness.proposals.get(second.id)!.status, "failed");
  } finally {
    await closeHarness(harness);
  }
});

test("NEEDS_CONFIRMATION answer continues the same worker session", async () => {
  const harness = await createHarness();
  try {
    await harness.manager.prompt(request("create proposal: ask"));
    const proposal = harness.proposals.list()[0]!;
    await harness.manager.prompt(request("confirm"));
    await waitFor(() => harness.proposals.get(proposal.id)!.status === "awaiting_user_confirmation");
    const pendingStep = harness.proposals.get(proposal.id)!.pending!;
    assert.equal(pendingStep.kind, "step");
    assert.equal(pendingStep.question, "May I overwrite it?");
    const workerSessionId = harness.proposals.get(proposal.id)!.workerNativeSessionId!;
    assert.ok(workerSessionId);

    await harness.manager.prompt(request("answer: yes, overwrite it"));
    await waitFor(() => harness.proposals.get(proposal.id)!.pending?.kind === "success");
    const continued = harness.proposals.get(proposal.id)!;
    assert.equal(continued.workerNativeSessionId, workerSessionId);
    assert.match(continued.lastWorkerSummary || "", new RegExp(`continued ${workerSessionId}`));

    const workerPrompts = readLog(harness.logFile).filter((entry) => entry.method === "session/prompt"
      && entry.text && (entry.text.startsWith("Execute this confirmed proposal") || entry.text.startsWith("The user answered your question")));
    assert.equal(workerPrompts.length, 2);
    assert.ok(workerPrompts.every((entry) => entry.sessionId === workerSessionId));

    await harness.manager.prompt(request("confirm"));
    assert.equal(harness.proposals.get(proposal.id)!.status, "completed");
  } finally {
    await closeHarness(harness);
  }
});

test("assistant tool activity fails closed and the next turn starts a clean session", async () => {
  const harness = await createHarness();
  try {
    await assert.rejects(harness.manager.prompt(request("force tool")), /forbidden tool activity/);
    assert.equal(harness.store.getBinding(CONVERSATION_KEY), undefined);
    const ok = await harness.manager.prompt(request("hello"));
    assert.equal(ok.text, "ok");
    assert.ok(harness.store.getBinding(CONVERSATION_KEY));
  } finally {
    await closeHarness(harness);
  }
});

test("worker completion notifies the owner chat through the event sink", async () => {
  const harness = await createHarness();
  try {
    await harness.manager.prompt(request("create proposal: succeed"));
    const proposal = harness.proposals.list()[0]!;
    await harness.manager.prompt(request("confirm"));
    await waitFor(() => harness.proposals.get(proposal.id)!.status === "awaiting_user_confirmation");
    await waitFor(() => harness.events.length > 0);
    assert.equal(harness.events[0]!.chatKey, CHAT_KEY);
    assert.match(harness.events[0]!.text, /event received: worker update/);
  } finally {
    await closeHarness(harness);
  }
});

test("restart recovery kills the persisted worker group and marks the working proposal failed as worker_lost", async () => {
  const harness = await createHarness();
  const token = crypto.randomUUID();
  const child = spawn(process.execPath, ["-e", "setInterval(() => {}, 1000)"], {
    detached: true,
    stdio: "ignore",
    env: { ...process.env, GORI_AGENT_WORKER_TOKEN: token }
  });
  child.unref();
  try {
    const proposal = await harness.proposals.create({ title: "lost", goal: "lost", steps: ["step"], ownerChatKey: CHAT_KEY, requesterUserId: "user-1" });
    await harness.proposals.update(proposal.id, { status: "working", startedAt: Date.now(), workerProcessGroup: { pgid: child.pid!, token } });
    assert.equal(processGroupExists(child.pid!), true);

    await reopenManager(harness);

    const recovered = harness.proposals.get(proposal.id)!;
    assert.equal(recovered.status, "failed");
    assert.match(recovered.pending?.summary || "", /worker_lost/);
    assert.match(recovered.lastWorkerSummary || "", /worker_lost/);
    assert.ok(recovered.finishedAt);
    await waitFor(() => !processGroupExists(child.pid!));
  } finally {
    try { process.kill(-child.pid!, "SIGKILL"); } catch { /* already dead */ }
    await closeHarness(harness);
  }
});

test("proposals are owned per chat+user: a second user in the same chat cannot confirm, stop, cancel, or list them", async () => {
  const harness = await createHarness();
  try {
    await harness.manager.prompt(request("create proposal: hang", "user-a"));
    await harness.manager.prompt(request("hello", "user-b"));
    assert.equal(harness.store.stats().bindings, 2);
    const proposal = harness.proposals.list()[0]!;
    assert.equal(proposal.status, "proposed");
    assert.equal(proposal.requesterUserId, "user-a");

    assert.equal(await harness.manager.confirm("webhook", "chat-1", "user-b"), false);
    await harness.manager.prompt(request("confirm", "user-b"));
    assert.equal(harness.proposals.get(proposal.id)!.status, "proposed");
    assert.equal(await harness.manager.cancel("webhook", "chat-1", "user-b"), false);
    await harness.manager.prompt(request("cancel proposal", "user-b"));
    assert.equal(harness.proposals.get(proposal.id)!.status, "proposed");
    assert.equal(await harness.manager.stop("webhook", "chat-1", "user-b"), false);
    assert.equal(harness.manager.listProposals("webhook", "chat-1", "user-b").length, 0);
    assert.equal(harness.manager.listProposals("webhook", "chat-1", "user-a").length, 1);

    assert.equal(await harness.manager.confirm("webhook", "chat-1", "user-a"), true);
    assert.equal(harness.proposals.get(proposal.id)!.status, "working");

    await harness.manager.prompt(request("hello again", "user-b"));
    const bPrompt = readLog(harness.logFile).find((entry) => entry.method === "session/prompt" && entry.text?.startsWith("[User message]\nhello again"));
    assert.ok(bPrompt?.text);
    assert.match(bPrompt.text!, /details hidden/);
    assert.doesNotMatch(bPrompt.text!, /Test proposal/);

    assert.equal(await harness.manager.stop("webhook", "chat-1", "user-b"), false);
    assert.equal(harness.proposals.get(proposal.id)!.status, "working");
    assert.equal(await harness.manager.stop("webhook", "chat-1", "user-a"), true);
    assert.equal(harness.proposals.get(proposal.id)!.status, "cancelled");
  } finally {
    await closeHarness(harness);
  }
});

test("start_next only starts the requesting user's own queued proposal", async () => {
  const harness = await createHarness();
  try {
    await harness.manager.prompt(request("create proposal: succeed", "user-a"));
    const first = harness.proposals.list()[0]!;
    await harness.manager.prompt(request("confirm", "user-a"));
    await waitFor(() => harness.proposals.get(first.id)!.status === "awaiting_user_confirmation");
    await harness.manager.prompt(request("create proposal: succeed", "user-a"));
    const second = harness.proposals.list().find((proposal) => proposal.id !== first.id)!;
    await harness.manager.prompt(request("confirm", "user-a"));
    assert.equal(harness.proposals.get(second.id)!.status, "queued");
    await harness.manager.prompt(request("confirm", "user-a"));
    assert.equal(harness.proposals.get(first.id)!.status, "completed");
    assert.equal(harness.proposals.get(second.id)!.status, "queued");

    await harness.manager.prompt(request("start next", "user-b"));
    assert.equal(harness.proposals.get(second.id)!.status, "queued");
    await harness.manager.prompt(request("start next", "user-a"));
    assert.equal(harness.proposals.get(second.id)!.status, "working");
    await waitFor(() => harness.proposals.get(second.id)!.status === "awaiting_user_confirmation");
  } finally {
    await closeHarness(harness);
  }
});

test("stop settles the latest awaiting proposal (success completes, failure fails, step cancels) without auto-starting the next", async () => {
  const harness = await createHarness();
  try {
    await harness.manager.prompt(request("create proposal: succeed", "user-a"));
    const first = harness.proposals.list()[0]!;
    await harness.manager.prompt(request("confirm", "user-a"));
    await waitFor(() => harness.proposals.get(first.id)!.status === "awaiting_user_confirmation");
    assert.equal(harness.proposals.get(first.id)!.pending?.kind, "success");

    await harness.manager.prompt(request("create proposal: succeed", "user-a"));
    const second = harness.proposals.list().find((proposal) => proposal.id !== first.id)!;
    await harness.manager.prompt(request("confirm", "user-a"));
    assert.equal(harness.proposals.get(second.id)!.status, "queued");

    await harness.manager.prompt(request("stop", "user-a"));
    assert.equal(harness.proposals.get(first.id)!.status, "completed");
    assert.ok(harness.proposals.get(first.id)!.finishedAt);
    assert.equal(harness.proposals.get(second.id)!.status, "queued");

    assert.equal(await harness.manager.stop("webhook", "chat-1", "user-b"), false);
    assert.equal(harness.proposals.get(second.id)!.status, "queued");

    await harness.manager.prompt(request("start next", "user-a"));
    await waitFor(() => harness.proposals.get(second.id)!.status === "awaiting_user_confirmation");
    assert.equal(await harness.manager.stop("webhook", "chat-1", "user-a"), true);
    assert.equal(harness.proposals.get(second.id)!.status, "completed");

    await harness.manager.prompt(request("create proposal: fail", "user-a"));
    const third = harness.proposals.list().find((proposal) => proposal.id !== first.id && proposal.id !== second.id)!;
    await harness.manager.prompt(request("confirm", "user-a"));
    await waitFor(() => harness.proposals.get(third.id)!.status === "awaiting_user_confirmation");
    assert.equal(harness.proposals.get(third.id)!.pending?.kind, "failure");
    assert.equal(await harness.manager.stop("webhook", "chat-1", "user-a"), true);
    assert.equal(harness.proposals.get(third.id)!.status, "failed");

    await harness.manager.prompt(request("create proposal: ask", "user-a"));
    const fourth = harness.proposals.list().find((proposal) => proposal.status === "proposed")!;
    await harness.manager.prompt(request("confirm", "user-a"));
    await waitFor(() => harness.proposals.get(fourth.id)!.status === "awaiting_user_confirmation");
    assert.equal(harness.proposals.get(fourth.id)!.pending?.kind, "step");
    assert.equal(await harness.manager.stop("webhook", "chat-1", "user-a"), true);
    assert.equal(harness.proposals.get(fourth.id)!.status, "cancelled");
    assert.equal(harness.manager.status("webhook", "chat-1", "user-a").workerRunning, false);
  } finally {
    await closeHarness(harness);
  }
});

test("envelope parsers accept valid tails and reject invalid ones", () => {
  assert.deepEqual(
    parseAssistantActions(`text\n<GORI_ASSISTANT_ACTION_V1>{"reply":"hi","actions":[{"type":"stop"}]}</GORI_ASSISTANT_ACTION_V1>`),
    { reply: "hi", actions: [{ type: "stop" }] }
  );
  assert.equal(parseAssistantActions("no envelope"), undefined);
  assert.equal(parseAssistantActions(`x\n<GORI_ASSISTANT_ACTION_V1>{"reply":"hi","actions":[{"type":"nuke"}]}</GORI_ASSISTANT_ACTION_V1>`), undefined);
  assert.deepEqual(
    parseWorkerResult(`text\n<GORI_WORKER_RESULT_V1>{"status":"NEEDS_CONFIRMATION","summary":"s","question":"q","dirty":true}</GORI_WORKER_RESULT_V1>`),
    { status: "NEEDS_CONFIRMATION", summary: "s", question: "q", nextStep: undefined, dirty: true }
  );
  assert.equal(parseWorkerResult(`x\n<GORI_WORKER_RESULT_V1>{"status":"DONE","summary":"s"}</GORI_WORKER_RESULT_V1>`), undefined);
});

function processGroupExists(pgid: number): boolean {
  try { process.kill(-pgid, 0); return true; }
  catch (error) { return (error as NodeJS.ErrnoException).code === "EPERM"; }
}