import assert from "node:assert/strict";
import test from "node:test";

import { runConsultationRecoveryPoll, type ConsultationRecoveryPollDeps } from "../src/lib/consultation-recovery-poll.ts";
import { ConsultationStatusError } from "../src/lib/home-cloud-sync.ts";
import { previewModelCatalog } from "../src/lib/home-types.ts";
import { withFakeTimers } from "./home-bootstrap-fake-timers.ts";

const sessionId = "11111111-1111-4111-8111-111111111111";
const requestId = "22222222-2222-4222-8222-222222222222";

async function flush() {
  for (let step = 0; step < 8; step += 1) await Promise.resolve();
}

function createPoll(overrides: {
  fetchConsultationStatus: ConsultationRecoveryPollDeps["fetchConsultationStatus"];
  missing?: number;
}) {
  const state = {
    notice: "",
    phase: "recovering" as "recovering" | null,
    pendingSession: sessionId as string | null,
    pendingRequest: requestId as string | null,
    replay: 0,
    error: "",
    refreshed: 0,
  };
  const deps: ConsultationRecoveryPollDeps = {
    pendingSessionId: sessionId,
    pendingRequestId: requestId,
    modelCatalog: previewModelCatalog,
    consultationStatusMissingCount: { current: overrides.missing ?? 0 },
    consultationReplayStarted: { current: null },
    consultationReplay: {
      current: () => {
        state.replay += 1;
        deps.consultationReplayStarted.current = requestId;
      },
    },
    pendingConsultation: { current: { phase: "recovering" } },
    setComposerNotice: (notice) => { state.notice = notice; },
    setSessions: () => undefined,
    setActiveSessionId: () => undefined,
    setPendingSessionId: (id) => { state.pendingSession = id; },
    setPendingRequestId: (id) => { state.pendingRequest = id; },
    setConsultationPhase: (phase) => { state.phase = phase === "recovering" ? "recovering" : null; },
    setStreamingReply: () => undefined,
    setRequestError: (value) => { state.error = value?.message ?? ""; },
    refreshAccount: () => { state.refreshed += 1; },
    online: () => true,
    fetchConsultationStatus: overrides.fetchConsultationStatus,
    fetchSessionDetail: async () => null,
  };
  return { deps, state };
}

test("the first 404 confirms the request and the next 404 replays it once", async () => {
  await withFakeTimers(async (tick) => {
    const { deps, state } = createPoll({
      fetchConsultationStatus: async () => { throw new ConsultationStatusError(404, "missing"); },
    });
    runConsultationRecoveryPoll(deps, new AbortController().signal);
    await flush();
    assert.equal(deps.consultationStatusMissingCount.current, 1);
    assert.equal(state.notice, "正在确认本次咨询请求是否已开始…");
    assert.equal(state.replay, 0);
    assert.equal(state.phase, "recovering");

    tick(1_750);
    await flush();
    assert.equal(deps.consultationStatusMissingCount.current, 2);
    assert.equal(state.replay, 1);
    assert.equal(state.phase, "recovering");
  });
});

test("the fourth missing status gives up and stops polling", async () => {
  await withFakeTimers(async (tick) => {
    const { deps, state } = createPoll({
      fetchConsultationStatus: async () => { throw new ConsultationStatusError(404, "missing"); },
    });
    runConsultationRecoveryPoll(deps, new AbortController().signal);
    await flush();
    tick(1_750);
    await flush();
    tick(1_750);
    await flush();
    assert.equal(deps.consultationStatusMissingCount.current, 3);
    assert.equal(state.notice, "正在重新发起本次咨询…");
    assert.equal(state.replay, 1);

    tick(1_750);
    await flush();
    assert.equal(deps.consultationStatusMissingCount.current, 4);
    assert.equal(state.pendingSession, null);
    assert.equal(state.pendingRequest, null);
    assert.equal(state.phase, null);
    assert.equal(state.error, "后台未找到本次咨询请求，请重新发送。");
    assert.equal(state.notice, "后台未找到本次咨询请求，已停止恢复，请重新发送。");
    const timersBefore = state.notice;
    tick(1_750);
    await flush();
    assert.equal(state.notice, timersBefore);
    assert.equal(deps.consultationStatusMissingCount.current, 4);
  });
});

test("a reserved status clears the missing count", async () => {
  await withFakeTimers(async (tick) => {
    const { deps, state } = createPoll({
      missing: 2,
      fetchConsultationStatus: async () => ({
        sessionId,
        requestId,
        status: "reserved",
      }),
    });
    runConsultationRecoveryPoll(deps, new AbortController().signal);
    await flush();
    assert.equal(deps.consultationStatusMissingCount.current, 2);
    tick(1_750);
    await flush();
    assert.equal(deps.consultationStatusMissingCount.current, 0);
    assert.equal(state.notice, "回答仍在后台生成，正在自动恢复。");
    assert.equal(state.phase, "recovering");
  });
});