/** 组件传输替身只验证渲染与取数路径；真实后端旅程由 Playwright 承担。 */
import { afterEach, expect, it, vi } from "vitest";
import {
  cleanup,
  render,
  screen,
  fireEvent,
  waitFor,
} from "@testing-library/react";
import { Ui依赖装配 } from "../../src/应用/依赖装配";
import { Ui任务上下文 } from "../../src/功能/上下文";

afterEach(() => {
  cleanup();
  vi.unstubAllGlobals();
});

const 有效快照 = {
  snapshot_id: "snap-1",
  task_id: "task-1",
  work_id: "work-1",
  input_hash: "a".repeat(64),
  state: "有效",
  invalidation: null,
  changes: [] as string[],
  assembly: {
    included_sources: ["目标章细纲", "历史:ch-1"],
    text_hash: "b".repeat(64),
    byte_size: 328,
    omissions: [{ source: "参考:超长素材", reason: "BUDGET_EXCEEDED" }],
  },
  sources: [
    {
      source_id: "doc-1",
      data_version: "1",
      schema_hash: "c".repeat(64),
      projection_version: "visible-text-codepoints/v1:production:generation",
      current_state: "有效",
    },
  ],
};

function 桩快照(快照: unknown) {
  return vi.fn(async (request: Request) => {
    expect(new URL(request.url).pathname).toBe(
      "/api/v1/tasks/task-1/context-snapshots/page",
    );
    return new Response(
      JSON.stringify({ items: 快照, has_more: false, next_cursor: null }),
      {
        headers: { "Content-Type": "application/json" },
      },
    );
  });
}

// @muse-case {"case_id":"NC-ui-context-snapshot-list","environment":"离线组件，传输替身","given":"含省略条目的有效快照","when":"渲染任务上下文组件","then":["材料清单、字节数与省略原因渲染；取数走 /tasks/{id}/context-snapshots"],"contract":"docs/系统架构/新版设计/模块设计/B09-上下文.md"}
it("NC-ui-context-snapshot-list：材料清单与省略原因渲染", async () => {
  vi.stubGlobal("fetch", 桩快照([有效快照]));
  render(
    <Ui依赖装配>
      <Ui任务上下文 taskId="task-1" scope="work-1" />
    </Ui依赖装配>,
  );
  expect(
    await screen.findByText("目标章细纲", { selector: ".step-list strong" }),
  ).toBeTruthy();
  expect(screen.getByText("历史:ch-1")).toBeTruthy();
  expect(screen.getByText("省略原因：超出材料预算，整项省略")).toBeTruthy();
  expect(screen.getByText(/材料 328 字节/)).toBeTruthy();
  expect(screen.getByText(new RegExp("b".repeat(64)))).toBeTruthy();
  expect(screen.getByText("doc-1")).toBeTruthy();
  expect(screen.getByText("版本 1")).toBeTruthy();
  expect(
    screen.getByText(/visible-text-codepoints\/v1:production:generation/),
  ).toBeTruthy();
  expect(screen.getByText("仍有效")).toBeTruthy();
  expect(screen.queryByRole("status")).toBeNull();
});

// @muse-case {"case_id":"NC-ui-context-stale-evidence","environment":"离线组件，传输替身","given":"漂移后的快照","when":"渲染任务上下文组件","then":["失效标注与具体变化项可见；来源证据仍显示版本与哈希"],"contract":"docs/系统架构/新版设计/模块设计/B09-上下文.md"}
it("NC-ui-context-stale-evidence：来源漂移后失效标注与具体变化可见", async () => {
  const 漂移快照 = {
    ...有效快照,
    state: "SOURCE_STALE",
    invalidation:
      "文稿 ch-1 已漂移（当前版本 2，冻结版本 1）；冻结范围当前失效，需重新授权",
    changes: ["文稿 ch-1 已从版本 1 前进到 2；来源锁定失效"],
    sources: [
      {
        ...有效快照.sources[0],
        data_version: "1",
        current_state: "SOURCE_STALE",
      },
    ],
  };
  vi.stubGlobal("fetch", 桩快照([漂移快照]));
  render(
    <Ui依赖装配>
      <Ui任务上下文 taskId="task-1" scope="work-1" />
    </Ui依赖装配>,
  );
  expect(await screen.findByText("来源已漂移，需重新授权")).toBeTruthy();
  expect(screen.getByText(/文稿 ch-1 已漂移/)).toBeTruthy();
  expect(
    screen.getByText("文稿 ch-1 已从版本 1 前进到 2；来源锁定失效"),
  ).toBeTruthy();
  expect(screen.getByText("已漂移")).toBeTruthy();
  // 失效不改写历史装配：清单与省略原因仍按冻结时原样显示。
  expect(screen.getByText("历史:ch-1")).toBeTruthy();
  expect(screen.getByText("省略原因：超出材料预算，整项省略")).toBeTruthy();
});

// @muse-case {"case_id":"NC-ui-context-empty-state","environment":"离线组件，传输替身","given":"没有快照的任务","when":"渲染任务上下文组件","then":["如实显示空态，不伪造材料"],"contract":"docs/系统架构/新版设计/模块设计/B09-上下文.md"}
it("NC-ui-context-empty-state：无快照任务如实显示空态", async () => {
  vi.stubGlobal("fetch", 桩快照([]));
  render(
    <Ui依赖装配>
      <Ui任务上下文 taskId="task-1" scope={null} />
    </Ui依赖装配>,
  );
  expect(await screen.findByText("这个任务还没有冻结材料快照")).toBeTruthy();
  expect(screen.getByText("0 份冻结快照")).toBeTruthy();
});

// @muse-case {"case_id":"O08-context-explicit-page","then":"材料分页初始只读20份，只有点击才读下一页，连续加载最多保留3页"}
it("O08-context-explicit-page：材料快照按页读取且缓存有界", async () => {
  const reads: string[] = [];
  vi.stubGlobal(
    "fetch",
    vi.fn(async (request: Request) => {
      const url = new URL(request.url);
      reads.push(url.searchParams.get("cursor") ?? "first");
      expect(url.pathname).toBe("/api/v1/tasks/task-1/context-snapshots/page");
      expect(url.searchParams.get("limit")).toBe("20");
      const page = Number(url.searchParams.get("cursor") ?? 0);
      return new Response(
        JSON.stringify({
          items: Array.from({ length: 20 }, (_, index) => ({
            ...有效快照,
            snapshot_id: `s-${page}-${index}`,
          })),
          has_more: page < 3,
          next_cursor: page < 3 ? String(page + 1) : null,
        }),
        { headers: { "Content-Type": "application/json" } },
      );
    }),
  );
  render(
    <Ui依赖装配>
      <Ui任务上下文 taskId="task-1" scope="work-1" />
    </Ui依赖装配>,
  );
  await screen.findByText("20 份冻结快照");
  expect(reads).toEqual(["first"]);
  for (let page = 1; page <= 3; page++) {
    fireEvent.click(screen.getByRole("button", { name: "加载更多材料快照" }));
    await waitFor(() => expect(reads).toHaveLength(page + 1));
    await screen.findByText(`${Math.min(page + 1, 3) * 20} 份冻结快照`);
  }
  expect(screen.queryByRole("button", { name: "加载更多材料快照" })).toBeNull();
});