// Integration test for the standalone "人衣图生成" admin tool
// (admin-dressgen.html + admin-dressgen-task.html): however many person
// reference photos the admin actually uploads (any subset of full-body/face
// × front/side/back, at least 1) + 1 garment image -> 3 new full-body images
// (front/side/back) of that person wearing the garment. This is a real
// background task: POST /api/admin/dressgen returns the row (status
// "queued") immediately and the 3 sequential gpt-image-2 calls run
// fire-and-forget after the response — a blocking synchronous version of
// this endpoint hit a real 502 from a front-end proxy timing out on the
// ~3.5 minutes 3 sequential ~70s calls can take (CODEX-IMAGEGEN.md), which
// is why this is async now. Tests poll GET /api/admin/dressgen/:id until
// the task reaches a terminal status, the same way a real client would.
//
// Runs server.js against a mock gpt-image-2 relay (IMAGE2_API_BASE points
// at it, over plain http — insecureHttpsRequest dispatches on the URL's own
// protocol for exactly this reason) so the whole upload -> task -> 3x
// edit-call -> save-outputs path runs offline. This does NOT prove the real
// 万界方舟 relay actually speaks this contract at /api/v1/images/edits — see
// generateDressImage()'s doc comment in server.js: that path's *existence*
// and the model-id/host/TLS quirks are confirmed (an OPTIONS/GET probe plus
// a working curl for the sibling /images/generations endpoint), but nobody
// has yet made a real authenticated call to /images/edits itself. Its
// request shape here mirrors OpenAI's own public /v1/images/edits contract,
// which the vendor is expected (per the user, not yet verified end-to-end)
// to mirror too.
const test = require("node:test");
const assert = require("node:assert/strict");
const fs = require("node:fs");
const path = require("node:path");
const os = require("node:os");
const http = require("node:http");
const { spawn } = require("node:child_process");

const PORT = 25934 + Math.floor(Math.random() * 1000);
const BASE = `http://localhost:${PORT}`;
const ADMIN_PASSWORD = "test-password-only-for-this-run";
const IMAGE2_API_KEY = "sk-mock-image2-key";
let cookie, child, cwd, mockImage2, mockImage2Port;
let editRequests;

const TINY_VALID_PNG = Buffer.from(
  "iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAIAAAD91JpzAAAAEklEQVR4nGPkEpFjYGBgYgADAALmAEAUQs4PAAAAAElFTkSuQmCC",
  "base64"
);
// A second, distinguishable 1x1 PNG, so the "generated" output isn't
// byte-identical to an input (would mask a wiring bug that echoes an input
// back instead of the mock's own response).
const OUTPUT_PNG = Buffer.from(
  "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAAg+lmCAAAAAXNSR0IArs4c6QAAAAtJREFUCNdj+M8AAAICAQD8p9y9AAAAAElFTkSuQmCC",
  "base64"
);

function waitForServer(url, timeoutMs = 10000) {
  const deadline = Date.now() + timeoutMs;
  return (async function poll() {
    while (Date.now() < deadline) {
      try {
        await fetch(url);
        return;
      } catch {
        await new Promise((r) => setTimeout(r, 100));
      }
    }
    throw new Error("server did not come up in time");
  })();
}

async function waitUntilTerminal(id, timeoutMs = 8000) {
  const deadline = Date.now() + timeoutMs;
  while (Date.now() < deadline) {
    const record = await fetch(`${BASE}/api/admin/dressgen/${id}`, { headers: { Cookie: cookie } }).then((r) => r.json());
    if (["done", "partial", "failed"].includes(record.status)) return record;
    await new Promise((r) => setTimeout(r, 50));
  }
  throw new Error("task did not reach a terminal status in time");
}

// "success": every call succeeds. "fail-all": every call fails. "fail-2nd":
// only the 2nd call (by arrival order — calls are sequential, so this is
// deterministic) fails.
let editMode = "success";
let concurrentCallsSeen = false;
let inFlight = 0;

// wavespeed mock state — a separate provider path exercised by its own
// tests (provider:"wavespeed"), sharing the same mock http server as
// IMAGE2 (routing is by path, same trick as the rest of this file).
let wavespeedUploadCount = 0;
let wavespeedSubmitBody = null;
let wavespeedShouldFail = false;
function BASE_MOCK_URL() {
  return `http://localhost:${mockImage2Port}`;
}

function startMockImage2() {
  return new Promise((resolve) => {
    mockImage2 = http.createServer((req, res) => {
      const chunks = [];
      req.on("data", (c) => chunks.push(c));
      req.on("end", () => {
        if (req.method === "POST" && req.url === "/api/v3/media/upload/binary") {
          wavespeedUploadCount++;
          res.writeHead(200, { "Content-Type": "application/json" });
          res.end(JSON.stringify({ code: 200, message: "success", data: { type: "image", download_url: `${BASE_MOCK_URL()}/uploaded-${wavespeedUploadCount}.png`, filename: `uploaded-${wavespeedUploadCount}.png`, size: 123 } }));
          return;
        }
        if (req.method === "POST" && req.url === "/api/v3/bytedance/seedream-v4/edit") {
          wavespeedSubmitBody = JSON.parse(Buffer.concat(chunks).toString("utf8"));
          res.writeHead(200, { "Content-Type": "application/json" });
          res.end(JSON.stringify({ code: 200, message: "success", data: { id: "ws-task-1", status: "created", urls: { get: `${BASE_MOCK_URL()}/api/v3/predictions/ws-task-1/result` } } }));
          return;
        }
        if (req.method === "GET" && req.url === "/api/v3/predictions/ws-task-1/result") {
          if (wavespeedShouldFail) {
            res.writeHead(200, { "Content-Type": "application/json" });
            res.end(JSON.stringify({ code: 200, message: "success", data: { id: "ws-task-1", status: "failed", error: "mock: wavespeed content rejected" } }));
            return;
          }
          res.writeHead(200, { "Content-Type": "application/json" });
          res.end(JSON.stringify({ code: 200, message: "success", data: { id: "ws-task-1", status: "completed", outputs: [`${BASE_MOCK_URL()}/wavespeed-output.png`] } }));
          return;
        }
        if (req.method === "GET" && req.url === "/wavespeed-output.png") {
          res.writeHead(200, { "Content-Type": "image/png" });
          res.end(OUTPUT_PNG);
          return;
        }
        if (req.method === "POST" && req.url === "/api/v1/images/edits") {
          inFlight++;
          if (inFlight > 1) concurrentCallsSeen = true;
          const bodyText = Buffer.concat(chunks).toString("latin1");
          editRequests.push({
            headers: req.headers,
            imageCount: (bodyText.match(/name="image\[\]"/g) || []).length,
            promptMatch: bodyText.match(/name="prompt"\r\n\r\n([^\r]*)/),
            modelMatch: bodyText.match(/name="model"\r\n\r\n([^\r]*)/),
            sizeMatch: bodyText.match(/name="size"\r\n\r\n([^\r]*)/),
          });
          const callNumber = editRequests.length;
          const shouldFail = editMode === "fail-all" || (editMode === "fail-2nd" && callNumber === 2);
          setTimeout(() => {
            inFlight--;
            if (shouldFail) {
              res.writeHead(400, { "Content-Type": "application/json" });
              res.end(JSON.stringify({ error: "mock: content rejected" }));
              return;
            }
            res.writeHead(200, { "Content-Type": "application/json" });
            res.end(JSON.stringify({ data: [{ b64_json: OUTPUT_PNG.toString("base64") }] }));
          }, 20); // small delay so a concurrent implementation would overlap calls
          return;
        }
        res.writeHead(404, { "Content-Type": "application/json" });
        res.end(JSON.stringify({ error: "not found in mock" }));
      });
    });
    mockImage2.listen(0, () => {
      mockImage2Port = mockImage2.address().port;
      resolve();
    });
  });
}

test.before(async () => {
  await startMockImage2();

  cwd = fs.mkdtempSync(path.join(os.tmpdir(), "dressgen-generate-"));
  for (const f of ["server.js", "ingest.js", "uploads.js", "store.js", "dressup-store.js", "prompt-template.js", "db.js", "pricing.js"]) {
    fs.copyFileSync(path.join(__dirname, f), path.join(cwd, f));
  }
  fs.writeFileSync(path.join(cwd, "dress-gen.json"), "[]");

  child = spawn(process.execPath, ["server.js"], {
    cwd,
    env: {
      ...process.env,
      PORT: String(PORT),
      H3_CONSOLE_BASE: "",
      H3_CONSOLE_TOKEN: "",
      ADMIN_PASSWORD,
      IMAGE2_API_KEY,
      IMAGE2_API_BASE: `http://localhost:${mockImage2Port}`,
      WAVESPEED_API_KEY: "ws-mock-key",
      WAVESPEED_API_BASE: `http://localhost:${mockImage2Port}`,
      WAVESPEED_POLL_INTERVAL_MS: "50",
    },
    stdio: "pipe",
  });
  await waitForServer(BASE);

  const loginRes = await fetch(`${BASE}/api/admin/login`, {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({ password: ADMIN_PASSWORD }),
  });
  cookie = (loginRes.headers.get("set-cookie") || "").split(";")[0];
});

test.after(() => {
  child.kill();
  mockImage2.close();
  fs.rmSync(cwd, { recursive: true, force: true });
});

async function uploadTinyPng(name) {
  const fd = new FormData();
  fd.append("file", new Blob([TINY_VALID_PNG], { type: "image/png" }), name);
  const res = await fetch(`${BASE}/api/admin/upload`, { method: "POST", headers: { Cookie: cookie }, body: fd });
  assert.equal(res.status, 200);
  return (await res.json()).url;
}

async function createTask(body) {
  const res = await fetch(`${BASE}/api/admin/dressgen`, {
    method: "POST",
    headers: { "Content-Type": "application/json", Cookie: cookie },
    body: JSON.stringify(body),
  });
  return { status: res.status, record: await res.json() };
}

test("GET /api/admin/dressgen/prompts returns one default prompt per view, front/side/back all distinct", async () => {
  const res = await fetch(`${BASE}/api/admin/dressgen/prompts`, { headers: { Cookie: cookie } });
  assert.equal(res.status, 200);
  const prompts = await res.json();
  assert.ok(prompts.front && prompts.side && prompts.back);
  assert.notEqual(prompts.front, prompts.side);
  assert.notEqual(prompts.side, prompts.back);
});

test("POST /api/admin/dressgen returns immediately with a queued task id (doesn't block on the 3 upstream calls)", async () => {
  editMode = "success";
  editRequests = [];
  const bodyFront = await uploadTinyPng("body-front.png");
  const faceFront = await uploadTinyPng("face-front.png");
  const garmentImage = await uploadTinyPng("garment.png");

  const { status, record } = await createTask({ bodyFront, faceFront, garmentImage });
  assert.equal(status, 200);
  assert.ok(record.id);
  assert.equal(record.status, "queued");
  assert.equal(record.outputImages.front, null, "must not have waited for generation to finish");
  assert.equal(editRequests.length, 0, "the edit calls happen after the response, not before it");

  const final = await waitUntilTerminal(record.id);
  assert.equal(final.status, "done");
  assert.equal(editRequests.length, 3, "one call per view even with fewer person refs");
  for (const r of editRequests) {
    assert.equal(r.imageCount, 3, "2 uploaded person refs + garment = 3 images per call");
    assert.equal(r.modelMatch && r.modelMatch[1], "GPT Image 2", "model id must be the literal vendor string, with spaces");
    assert.equal(r.sizeMatch && r.sizeMatch[1], "1024x1536");
  }
  assert.equal(concurrentCallsSeen, false, "calls must be sequential, not concurrent");
  for (const view of ["front", "side", "back"]) {
    assert.equal(final.viewStatus[view], "done");
    const served = await fetch(`${BASE}${final.outputImages[view]}`);
    assert.ok(Buffer.from(await served.arrayBuffer()).equals(OUTPUT_PNG));
  }

  const list = await fetch(`${BASE}/api/admin/dressgen?pageSize=100`, { headers: { Cookie: cookie } }).then((r) => r.json());
  assert.ok(list.items.some((r) => r.id === record.id));
  assert.ok(list.total >= 1);

  const fetched = await fetch(`${BASE}/api/admin/dressgen/${record.id}`, { headers: { Cookie: cookie } });
  assert.equal(fetched.status, 200);
});

test("GET /api/admin/dressgen/:id 404s for an unknown id", async () => {
  const res = await fetch(`${BASE}/api/admin/dressgen/does-not-exist`, { headers: { Cookie: cookie } });
  assert.equal(res.status, 404);
});

test("POST /api/admin/dressgen: a missing garmentImage is rejected synchronously, no task created", async () => {
  const bodyFront = await uploadTinyPng("body-front2.png");
  const { status } = await createTask({ bodyFront });
  assert.equal(status, 400);
});

test("POST /api/admin/dressgen: zero person refs is rejected synchronously (need at least one)", async () => {
  const garmentImage = await uploadTinyPng("garment2.png");
  const { status } = await createTask({ garmentImage });
  assert.equal(status, 400);
});

test("POST /api/admin/dressgen: a per-view custom prompt is sent verbatim to that view's edit call, others keep their own default", async () => {
  editMode = "success";
  editRequests = [];
  const bodyFront = await uploadTinyPng("body-front3.png");
  const garmentImage = await uploadTinyPng("garment3.png");
  // ASCII-only on purpose: the mock decodes the raw multipart body as
  // latin1 (binary-safe for the image bytes elsewhere in the same body),
  // which would mangle a UTF-8/Chinese string — not a real server
  // limitation, just this test's own byte-extraction trick.
  const customSidePrompt = "CUSTOM_SIDE_PROMPT_ONLY_FOR_THIS_TEST";

  const { status, record } = await createTask({ bodyFront, garmentImage, prompts: { side: customSidePrompt } });
  assert.equal(status, 200);
  assert.equal(record.prompts.side, customSidePrompt);
  assert.notEqual(record.prompts.front, record.prompts.side);

  await waitUntilTerminal(record.id);
  const sidePromptSent = editRequests.map((r) => r.promptMatch && r.promptMatch[1]).find((p) => p === customSidePrompt);
  assert.ok(sidePromptSent, "the custom side prompt must actually reach the edit call, not just the stored record");
});

test("one view failing (2nd, sequential) doesn't lose the other two — task settles as 'partial'", async () => {
  // Both providers must fail for this view to genuinely fail, now that
  // image2 auto-falls-back to wavespeed (see the fallback test above).
  editMode = "fail-2nd";
  wavespeedShouldFail = true;
  editRequests = [];
  const bodyFront = await uploadTinyPng("body-front4.png");
  const garmentImage = await uploadTinyPng("garment4.png");

  const { record } = await createTask({ bodyFront, garmentImage });
  const final = await waitUntilTerminal(record.id);
  assert.equal(final.status, "partial");
  assert.ok(final.outputImages.front);
  assert.equal(final.outputImages.side, null);
  assert.equal(final.viewStatus.side, "failed");
  assert.match(final.errors.side, /wavespeed generation failed/, "fallback ran and its failure is what's recorded");
  assert.ok(final.outputImages.back);
  editMode = "success";
  wavespeedShouldFail = false;
});

test("all 3 views failing -> task settles as 'failed'", async () => {
  editMode = "fail-all";
  wavespeedShouldFail = true; // both providers must fail — see note above
  editRequests = [];
  const bodyFront = await uploadTinyPng("body-front5.png");
  const garmentImage = await uploadTinyPng("garment5.png");

  const { record } = await createTask({ bodyFront, garmentImage });
  const final = await waitUntilTerminal(record.id);
  assert.equal(final.status, "failed");
  for (const view of ["front", "side", "back"]) {
    assert.equal(final.outputImages[view], null);
    assert.match(final.errors[view], /wavespeed generation failed/);
  }
  wavespeedShouldFail = false;
});

test("POST /api/admin/dressgen: rejects a non-/uploads/ path (defense against arbitrary local file reads)", async () => {
  const garmentImage = await uploadTinyPng("garment6.png");
  const { status } = await createTask({ bodyFront: "/etc/passwd", garmentImage });
  assert.equal(status, 400);
});

test("POST /api/admin/dressgen/:id/retry: whole-task retry reuses the original images/prompts, only redoes the failed view", async () => {
  // Pick up the failed-all task from the previous test and fix the mock.
  const failedRes = await fetch(`${BASE}/api/admin/dressgen?pageSize=100`, { headers: { Cookie: cookie } }).then((r) => r.json());
  const failedTask = failedRes.items.find((r) => r.status === "failed"); // items are already newest-first
  assert.ok(failedTask, "expected a failed task from the earlier all-fail test");

  editMode = "success";
  editRequests = [];
  const res = await fetch(`${BASE}/api/admin/dressgen/${failedTask.id}/retry`, { method: "POST", headers: { Cookie: cookie } });
  assert.equal(res.status, 200);
  const kicked = await res.json();
  assert.equal(kicked.status, "generating");

  const final = await waitUntilTerminal(failedTask.id);
  assert.equal(final.status, "done");
  assert.equal(editRequests.length, 3, "retry reprocesses all 3 views since all 3 had failed");
  // No new images were uploaded for the retry — it must be the original ones.
  assert.equal(final.garmentImage, failedTask.garmentImage);
  assert.equal(final.bodyFront, failedTask.bodyFront);
});

test("POST /api/admin/dressgen/:id/retry/:view: regenerates only that one view, leaves the others untouched", async () => {
  editMode = "fail-2nd";
  wavespeedShouldFail = true; // both providers must fail to get a genuinely partial task
  editRequests = [];
  const bodyFront = await uploadTinyPng("body-front6.png");
  const garmentImage = await uploadTinyPng("garment7.png");
  const { record } = await createTask({ bodyFront, garmentImage });
  const partial = await waitUntilTerminal(record.id);
  assert.equal(partial.status, "partial");
  const originalFront = partial.outputImages.front;
  wavespeedShouldFail = false;

  editMode = "success";
  editRequests = [];
  const res = await fetch(`${BASE}/api/admin/dressgen/${record.id}/retry/side`, { method: "POST", headers: { Cookie: cookie } });
  assert.equal(res.status, 200);

  const final = await waitUntilTerminal(record.id);
  assert.equal(final.status, "done");
  assert.equal(editRequests.length, 1, "per-view retry only calls the API once, for that view");
  assert.equal(final.outputImages.front, originalFront, "the already-succeeded front view must be untouched by a side-only retry");
  assert.ok(final.outputImages.side);
});

test("POST /api/admin/dressgen/:id/retry/:view: an optional prompt override is used for that call and persisted on the record", async () => {
  editMode = "fail-2nd";
  editRequests = [];
  const bodyFront = await uploadTinyPng("body-front7.png");
  const garmentImage = await uploadTinyPng("garment8.png");
  const { record } = await createTask({ bodyFront, garmentImage });
  await waitUntilTerminal(record.id);

  editMode = "success";
  editRequests = [];
  const overridePrompt = "REGENERATE_SIDE_WITH_THIS_EXACT_PROMPT";
  const res = await fetch(`${BASE}/api/admin/dressgen/${record.id}/retry/side`, {
    method: "POST",
    headers: { "Content-Type": "application/json", Cookie: cookie },
    body: JSON.stringify({ prompt: overridePrompt }),
  });
  assert.equal(res.status, 200);
  const kicked = await res.json();
  assert.equal(kicked.prompts.side, overridePrompt, "the override must be persisted on the record immediately");

  const final = await waitUntilTerminal(record.id);
  assert.equal(final.prompts.side, overridePrompt);
  const sidePromptSent = editRequests.map((r) => r.promptMatch && r.promptMatch[1]).find((p) => p === overridePrompt);
  assert.ok(sidePromptSent, "the override must actually reach the edit call");
});

test("POST /api/admin/dressgen/:id/retry: unknown id 404s", async () => {
  const res = await fetch(`${BASE}/api/admin/dressgen/does-not-exist/retry`, { method: "POST", headers: { Cookie: cookie } });
  assert.equal(res.status, 404);
});

// provider:"wavespeed" — the second provider (2026-09-03), pickable per
// task via the admin UI, or used automatically as an image2-failure
// fallback (see the auto-fallback test below, and server.js's
// WAVESPEED_API_KEY doc comment for the history of that decision).
// Exercises the real upload -> submit -> poll -> fetch-output contract
// against the mock wavespeed routes added to the same mock server.
test("POST /api/admin/dressgen with provider:'wavespeed' uploads every image, submits once per view, and downloads the completed output", async () => {
  editMode = "success";
  wavespeedShouldFail = false;
  wavespeedUploadCount = 0;
  wavespeedSubmitBody = null;
  const bodyFront = await uploadTinyPng("ws-body-front.png");
  const garmentImage = await uploadTinyPng("ws-garment.png");

  const { status, record } = await createTask({ bodyFront, garmentImage, provider: "wavespeed" });
  assert.equal(status, 200);
  assert.equal(record.provider, "wavespeed");

  const final = await waitUntilTerminal(record.id);
  assert.equal(final.status, "done");
  assert.equal(wavespeedUploadCount, 6, "2 images (body+garment) uploaded once per each of the 3 sequential view calls");
  assert.ok(Array.isArray(wavespeedSubmitBody.images) && wavespeedSubmitBody.images.length === 2, "submit body must carry the uploaded image URLs, not local paths");
  assert.ok(wavespeedSubmitBody.prompt, "submit body must carry the view's prompt");

  for (const view of ["front", "side", "back"]) {
    const served = await fetch(`${BASE}${final.outputImages[view]}`);
    assert.ok(Buffer.from(await served.arrayBuffer()).equals(OUTPUT_PNG));
  }
});

test("POST /api/admin/dressgen with provider:'wavespeed': a failed generation is recorded per view same as the image2 path", async () => {
  wavespeedShouldFail = true;
  const bodyFront = await uploadTinyPng("ws-body-front2.png");
  const garmentImage = await uploadTinyPng("ws-garment2.png");

  const { record } = await createTask({ bodyFront, garmentImage, provider: "wavespeed" });
  const final = await waitUntilTerminal(record.id);
  assert.equal(final.status, "failed");
  for (const view of ["front", "side", "back"]) {
    assert.equal(final.outputImages[view], null);
    assert.match(final.errors[view], /wavespeed generation failed/);
  }
  wavespeedShouldFail = false;
});

test("POST /api/admin/dressgen: default provider (image2) failing auto-falls-back to wavespeed per view, no admin action needed", async () => {
  editMode = "fail-all";
  wavespeedShouldFail = false;
  const bodyFront = await uploadTinyPng("fallback-body-front.png");
  const garmentImage = await uploadTinyPng("fallback-garment.png");

  const { status, record } = await createTask({ bodyFront, garmentImage }); // no provider -> defaults to image2
  assert.equal(status, 200);
  assert.equal(record.provider, "image2");

  const final = await waitUntilTerminal(record.id);
  assert.equal(final.status, "done", "image2 failed on every view but wavespeed picked up each one");
  for (const view of ["front", "side", "back"]) {
    assert.ok(final.outputImages[view], `${view} must have an output despite image2 failing`);
    assert.equal(final.errors[view], null);
    assert.equal(final.viewProvider[view], "wavespeed", "record must reflect which provider actually produced this view");
  }
  editMode = "success";
});

test("POST /api/admin/dressgen: an unrecognized provider value falls back to the default (image2), not an error", async () => {
  editMode = "success";
  editRequests = [];
  const bodyFront = await uploadTinyPng("ws-body-front3.png");
  const garmentImage = await uploadTinyPng("ws-garment3.png");

  const { status, record } = await createTask({ bodyFront, garmentImage, provider: "not-a-real-provider" });
  assert.equal(status, 200);
  assert.equal(record.provider, "image2");
  await waitUntilTerminal(record.id);
});

// Pagination (2026-09-03) — GET /api/admin/dressgen used to return the
// whole file as a bare array; by this point in the suite there are well
// over 2 records, so this doesn't need to create its own.
test("GET /api/admin/dressgen: paginates, newest first, page 1 and page 2 don't overlap", async () => {
  const page1 = await fetch(`${BASE}/api/admin/dressgen?page=1&pageSize=2`, { headers: { Cookie: cookie } }).then((r) => r.json());
  assert.equal(page1.items.length, 2);
  assert.equal(page1.page, 1);
  assert.equal(page1.pageSize, 2);
  assert.ok(page1.total >= 10, "the suite has created well more than 2 tasks by now");

  const page2 = await fetch(`${BASE}/api/admin/dressgen?page=2&pageSize=2`, { headers: { Cookie: cookie } }).then((r) => r.json());
  assert.equal(page2.items.length, 2);
  const page1Ids = new Set(page1.items.map((r) => r.id));
  assert.ok(page2.items.every((r) => !page1Ids.has(r.id)), "page 2 must not repeat page 1's items");
  assert.ok(page1.items[0].createdAt >= page1.items[1].createdAt, "newest-first within a page");
  assert.ok(page1.items[1].createdAt >= page2.items[0].createdAt, "newest-first across pages too");
});

// Stale-task recovery (2026-09-03): a record can be left sitting in
// "generating" forever if the process dies mid-view — nothing resumes an
// in-flight HTTP call across a restart. Own isolated server + mock (a mock
// that never responds, so the task is provably still "generating" when
// killed) sharing one on-disk dress-gen.json across two child processes,
// simulating a crash-and-restart.
test("a task stuck in 'generating' when the process restarts is marked failed on the next boot, not stuck forever", async () => {
  let hangingMock;
  const hangingPort = await new Promise((resolve) => {
    hangingMock = http.createServer((req, res) => {
      if (req.method === "POST" && req.url === "/api/v1/images/edits") return; // never responds
      res.writeHead(404).end();
    });
    hangingMock.listen(0, () => resolve(hangingMock.address().port));
  });

  const port2 = 26934 + Math.floor(Math.random() * 1000);
  const base2 = `http://localhost:${port2}`;
  const cwd2 = fs.mkdtempSync(path.join(os.tmpdir(), "dressgen-restart-"));
  for (const f of ["server.js", "ingest.js", "uploads.js", "store.js", "dressup-store.js", "prompt-template.js", "db.js", "pricing.js"]) {
    fs.copyFileSync(path.join(__dirname, f), path.join(cwd2, f));
  }
  fs.writeFileSync(path.join(cwd2, "dress-gen.json"), "[]");
  fs.mkdirSync(path.join(cwd2, "uploads"), { recursive: true });
  fs.writeFileSync(path.join(cwd2, "uploads", "restart-body.png"), TINY_VALID_PNG);
  fs.writeFileSync(path.join(cwd2, "uploads", "restart-garment.png"), TINY_VALID_PNG);

  const env2 = {
    ...process.env,
    PORT: String(port2),
    H3_CONSOLE_BASE: "",
    H3_CONSOLE_TOKEN: "",
    ADMIN_PASSWORD,
    IMAGE2_API_KEY,
    IMAGE2_API_BASE: `http://localhost:${hangingPort}`,
    WAVESPEED_API_KEY: "", // no fallback — this test wants a plain stuck "generating" view
  };

  let child2 = spawn(process.execPath, ["server.js"], { cwd: cwd2, env: env2, stdio: "pipe" });
  try {
    await waitForServer(base2);
    const loginRes = await fetch(`${base2}/api/admin/login`, {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ password: ADMIN_PASSWORD }),
    });
    const cookie2 = (loginRes.headers.get("set-cookie") || "").split(";")[0];

    const created = await fetch(`${base2}/api/admin/dressgen`, {
      method: "POST",
      headers: { "Content-Type": "application/json", Cookie: cookie2 },
      body: JSON.stringify({ bodyFront: "/uploads/restart-body.png", garmentImage: "/uploads/restart-garment.png" }),
    }).then((r) => r.json());

    // Wait for the front view to actually reach "generating" (i.e. the
    // hanging mock has been called) before killing — proves this is a
    // genuinely in-flight task, not a "queued" one that never started.
    const deadline = Date.now() + 5000;
    let record;
    do {
      record = await fetch(`${base2}/api/admin/dressgen/${created.id}`, { headers: { Cookie: cookie2 } }).then((r) => r.json());
      if (record.viewStatus.front === "generating") break;
      await new Promise((r) => setTimeout(r, 20));
    } while (Date.now() < deadline);
    assert.equal(record.viewStatus.front, "generating", "front view must genuinely be in flight before the simulated crash");

    child2.kill("SIGKILL"); // simulate a crash — no graceful shutdown, no chance to mark anything failed on the way out
    await new Promise((r) => setTimeout(r, 200));

    child2 = spawn(process.execPath, ["server.js"], { cwd: cwd2, env: env2, stdio: "pipe" });
    await waitForServer(base2);
    // adminSessions lives in memory — a fresh process means the old cookie
    // is gone too, not just the in-flight generation.
    const loginRes2 = await fetch(`${base2}/api/admin/login`, {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ password: ADMIN_PASSWORD }),
    });
    const cookie3 = (loginRes2.headers.get("set-cookie") || "").split(";")[0];
    const recovered = await fetch(`${base2}/api/admin/dressgen/${created.id}`, { headers: { Cookie: cookie3 } }).then((r) => r.json());
    assert.equal(recovered.viewStatus.front, "failed");
    assert.match(recovered.errors.front, /进程重启/);
    assert.equal(recovered.status, "failed", "no view ever succeeded, so the whole task is 'failed'");
  } finally {
    child2.kill();
    hangingMock.close();
    fs.rmSync(cwd2, { recursive: true, force: true });
  }
});