import assert from "node:assert/strict";
import { spawnSync } from "node:child_process";
import { fileURLToPath } from "node:url";
import test from "node:test";

// BUG-1047 D3, route level (TASK-rectification-latency-20260926). The real
// POST /api/rectification/agent handler with fake persistence: a typed answer
// to a pending choice gets its first stream byte — the `turn.progress`
// received line — while the intent classifier is still running, and the
// deterministic reply follows on the same stream after the awaited exit gate.
// The progress line never reaches the persisted assistant message.
// Uses node:test module mocks (Node >= 22.3, same as the other route tests).
test("a typed message streams turn.progress before the classifier answers, then the reply after the exit gate", () => {
  const script = String.raw`
    import assert from 'node:assert/strict';
    import { mock } from 'node:test';
    import { pathToFileURL } from 'node:url';
    import { CASE_ID, SESSION_ID, USER_ID, TURN_ID, FOCUS_ID, dossierFixture,
      conversationSummaryFixture, activeFocusFixture, receiptHandlers } from './tests/rectification-v9-test-support.ts';
    import * as realClassifier from './src/lib/rectification-agentic/v9/turn-intent-classifier.ts';
    import * as realTurnExit from './src/lib/rectification-agentic/v9/turn-exit.ts';
    import { RECTIFICATION_USER_COPY } from './src/lib/rectification-agentic/user-copy.ts';
    import { RECTIFICATION_TURN_PROGRESS_LABELS } from './src/lib/rectification-activity-labels.ts';

    const prompt = '2023 年前后，有没有换过工作或职责明显变化？';
    const focus = activeFocusFixture({ intent: 'distinguish_candidates', questionId: 'd10:career:2023',
      expectedAnswerSchema: { prompt, probe_id: 'probe:career:2023', choice: { prompt,
        option_a: '明确发生且时间吻合', option_b: '发生过但程度较弱', option_c: '没有这回事', option_d: '这段记不清楚',
        options: [
        { key: 'A', label: '明确发生且时间吻合', answer_class: 'yes' },
        { key: 'B', label: '发生过但程度较弱', answer_class: 'weak_yes' },
        { key: 'C', label: '没有这回事', answer_class: 'no' },
        { key: 'D', label: '这段记不清楚', answer_class: 'unsure' },
      ] } } });
    const calls = [];
    const order = [];
    const accounting = { rpc: async (fn, args = {}) => {
      calls.push({ fn, args });
      let data;
      if (fn === 'get_agentic_rectification_case') data = { ...dossierFixture().case, session_id: SESSION_ID, status: 'collecting_evidence' };
      else if (fn === 'get_agentic_rectification_case_dossier') data = dossierFixture({
        conversationSummary: conversationSummaryFixture({ activeFocus: focus }) });
      else if (fn === 'append_agentic_rectification_turn') { order.push('append'); data = { turn_id: TURN_ID, idempotent: false }; }
      else if (receiptHandlers[fn]) data = await receiptHandlers[fn](fn, args);
      else throw new Error('Unexpected persistence RPC: ' + fn);
      return { data: structuredClone(data), error: null };
    }, from: () => { throw new Error('no table access expected'); } };

    let releaseClassifier;
    const classifierGate = new Promise((resolve) => { releaseClassifier = resolve; });
    let classifierStarted = 0;
    mock.module('server-only', { namedExports: {} });
    mock.module('@/lib/supabase/server', { namedExports: { createServerSupabaseClient: async () => ({
      auth: { getUser: async () => ({ data: { user: { id: USER_ID } }, error: null }) },
      from: () => ({ select() { return this; }, eq() { return this; },
        maybeSingle: async () => ({ data: { id: SESSION_ID, session_type: 'birth_time_rectification',
          agentic_rectification_case_id: CASE_ID, model_id: 'synthetic', model_config_version: 1 }, error: null }) })
    }) } });
    mock.module('@/lib/supabase/admin', { namedExports: { createAdminSupabaseClient: () => accounting } });
    mock.module('@/lib/product-access', { namedExports: { isProductEnabled: async () => true } });
    mock.module('@/lib/feature-flags', { namedExports: { loadRuntimeFeatureFlags: async () => new Map([
      ['rectification_runtime_version', { enabled: true }]
    ]) } });
    mock.module('@/lib/model-catalog', { namedExports: { resolveSessionLanguageModel: async () => ({
      id: 'synthetic', configVersion: 1, model: {}
    }) } });
    mock.module('@/mastra/agentic-rectification', { namedExports: { getRectificationV9Agent: async () => {
      throw new Error('the deterministic path must not build an Agent');
    } } });
    mock.module('@/lib/rectification-agentic/v9/turn-intent-classifier', { namedExports: {
      ...realClassifier,
      classifyTurnIntentWithRetry: async () => {
        classifierStarted += 1;
        await classifierGate;
        order.push('classified');
        return { classified: null, expectedWrite: 'unknown', outcome: 'classifier_unavailable',
          diagnostic: { outcome: 'classifier_unavailable', attempts: 2, timedOutAttempts: 2, elapsedMs: 20000 } };
      },
    } });
    mock.module('@/lib/rectification-agentic/v9/turn-exit', { namedExports: {
      ...realTurnExit,
      finalizeSuccessfulTurnExit: async (input) => {
        order.push('exit:' + input.action + ':' + input.askedTurnId);
      },
    } });

    const { POST } = await import(pathToFileURL(process.cwd() + '/src/app/api/rectification/agent/route.ts').href);
    const sentAt = Date.now();
    const response = await POST(new Request('https://example.invalid/api/rectification/agent', {
      method: 'POST', headers: { 'content-type': 'application/json' },
      body: JSON.stringify({ caseId: CASE_ID, sessionId: SESSION_ID, requestId: TURN_ID, action: 'message',
        message: '换过，2023 年 3 月' })
    }));
    assert.equal(response.status, 200);
    const reader = response.body.getReader();
    const decoder = new TextDecoder();
    const first = await reader.read();
    const firstMs = Date.now() - sentAt;
    const firstLine = decoder.decode(first.value).trim().split('\n')[0];
    assert.deepEqual(JSON.parse(firstLine), { type: 'turn.progress', stage: 'received' });
    assert.ok(firstMs <= 300, 'first byte within 300 ms, was ' + firstMs);
    // The classifier is running (or about to) and has not answered: nothing else streamed yet.
    await new Promise((resolve) => setTimeout(resolve, 50));
    assert.equal(classifierStarted, 1);
    assert.deepEqual(order, []);
    releaseClassifier();
    let rest = decoder.decode(first.value).trim().split('\n').slice(1).join('\n');
    for (;;) {
      const { done, value } = await reader.read();
      if (done) break;
      rest += decoder.decode(value, { stream: true });
    }
    const events = rest.trim().split('\n').filter(Boolean).map((line) => JSON.parse(line));
    const types = events.map((event) => event.type);
    assert.deepEqual(types.filter((type) => type !== 'turn.progress'), ['answer.delta', 'run.completed'], JSON.stringify(events));
    assert.equal(events.find((event) => event.type === 'answer.delta').text, RECTIFICATION_USER_COPY.classifierUnavailableReply);
    assert.equal(events.find((event) => event.type === 'run.completed').turnId, TURN_ID);
    // Classified → persisted → awaited exit gate → only then the reply bytes.
    assert.deepEqual(order, ['classified', 'append', 'exit:message:' + TURN_ID]);
    const append = calls.find((call) => call.fn === 'append_agentic_rectification_turn');
    assert.equal(append.args.p_assistant_message, RECTIFICATION_USER_COPY.classifierUnavailableReply);
    for (const line of Object.values(RECTIFICATION_TURN_PROGRESS_LABELS)) {
      assert.equal(JSON.stringify(calls).includes(line), false, 'progress line persisted: ' + line);
    }
    console.log(JSON.stringify({ firstMs, types: ['turn.progress', ...types] }));
  `;
  const result = spawnSync(process.execPath, ["--experimental-test-module-mocks", "--import", "tsx", "--input-type=module", "--eval", script], {
    cwd: fileURLToPath(new URL("../", import.meta.url)), encoding: "utf8", timeout: 60_000,
  });
  assert.equal(result.status, 0, result.stderr + result.stdout);
  console.log(result.stdout.trim());
});

test("a rejected typed message arrives as turn.rejected on the stream with the old status, code and message", () => {
  const script = String.raw`
    import assert from 'node:assert/strict';
    import { mock } from 'node:test';
    import { pathToFileURL } from 'node:url';
    import { CASE_ID, SESSION_ID, USER_ID, TURN_ID, dossierFixture, receiptHandlers } from './tests/rectification-v9-test-support.ts';
    const accounting = { rpc: async (fn, args = {}) => {
      if (fn === 'get_agentic_rectification_case') return { data: { ...dossierFixture().case, session_id: SESSION_ID, status: 'collecting_evidence' }, error: null };
      if (fn === 'get_agentic_rectification_case_dossier') return { data: null, error: { message: 'agentic_rectification_case_terminal' } };
      if (receiptHandlers[fn]) return { data: await receiptHandlers[fn](fn, args), error: null };
      throw new Error('Unexpected persistence RPC: ' + fn);
    } };
    mock.module('server-only', { namedExports: {} });
    mock.module('@/lib/supabase/server', { namedExports: { createServerSupabaseClient: async () => ({
      auth: { getUser: async () => ({ data: { user: { id: USER_ID } }, error: null }) },
      from: () => ({ select() { return this; }, eq() { return this; },
        maybeSingle: async () => ({ data: { id: SESSION_ID, session_type: 'birth_time_rectification',
          agentic_rectification_case_id: CASE_ID, model_id: 'synthetic', model_config_version: 1 }, error: null }) })
    }) } });
    mock.module('@/lib/supabase/admin', { namedExports: { createAdminSupabaseClient: () => accounting } });
    mock.module('@/lib/product-access', { namedExports: { isProductEnabled: async () => true } });
    mock.module('@/lib/feature-flags', { namedExports: { loadRuntimeFeatureFlags: async () => new Map([
      ['rectification_runtime_version', { enabled: true }]
    ]) } });
    mock.module('@/lib/model-catalog', { namedExports: { resolveSessionLanguageModel: async () => ({
      id: 'synthetic', configVersion: 1, model: {}
    }) } });
    mock.module('@/mastra/agentic-rectification', { namedExports: { getRectificationV9Agent: async () => {
      throw new Error('no Agent expected');
    } } });
    const { POST } = await import(pathToFileURL(process.cwd() + '/src/app/api/rectification/agent/route.ts').href);
    const response = await POST(new Request('https://example.invalid/api/rectification/agent', {
      method: 'POST', headers: { 'content-type': 'application/json' },
      body: JSON.stringify({ caseId: CASE_ID, sessionId: SESSION_ID, requestId: TURN_ID, action: 'message', message: '换过' })
    }));
    assert.equal(response.status, 200);
    const events = (await response.text()).trim().split('\n').map((line) => JSON.parse(line));
    assert.deepEqual(events, [
      { type: 'turn.progress', stage: 'received' },
      { type: 'turn.rejected', httpStatus: 409, code: 'case_terminal', message: '该校正已结束，不能继续修改' },
    ]);
    console.log(JSON.stringify(events.map((event) => event.type)));
  `;
  const result = spawnSync(process.execPath, ["--experimental-test-module-mocks", "--import", "tsx", "--input-type=module", "--eval", script], {
    cwd: fileURLToPath(new URL("../", import.meta.url)), encoding: "utf8", timeout: 60_000,
  });
  assert.equal(result.status, 0, result.stderr + result.stdout);
  console.log(result.stdout.trim());
});