// @vitest-environment jsdom

import { render, screen, within } from "@testing-library/react";
import { type ComponentType } from "react";
import {
  createMemoryRouter,
  Outlet,
  RouterProvider,
} from "react-router-dom";
import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";

import { createTechLogFeatureInstalledInput } from "../../../src/features/tech-log/adapters/create-tech-log-feature-input.ts";
import { MOCK_STUDIO_INSTALL_CONTEXT } from "../../helpers/studio-install-context.ts";
import {
  TECH_LOG_ROUTE_REGISTRY,
  TECH_LOG_ROUTE_RUNTIME_CONTRACT,
} from "../../../src/features/tech-log/contracts/tech-log-route-contract.ts";
import { CasePage } from "../../../src/features/tech-log/presentation/public/pages/case-page.tsx";
import { QuestionPage } from "../../../src/features/tech-log/presentation/public/pages/question-page.tsx";
import { ReferencePage } from "../../../src/features/tech-log/presentation/public/pages/reference-page.tsx";
import { TopicPage } from "../../../src/features/tech-log/presentation/public/pages/topic-page.tsx";
import { PublicNotFoundPage as NotFoundPage } from "../../../src/features/tech-log/presentation/public/pages/public-not-found-page.tsx";
import { PublicShell } from "../../../src/features/tech-log/presentation/public/public-shell.tsx";
import { TECH_LOG_ROUTE_CODECS } from "../../../src/features/tech-log/presentation/tech-log-route-codecs.ts";
import { ApplicationProvider } from "../../../src/presentation/providers/application-provider.tsx";
import { createGroupedRouteObjects } from "../../../src/presentation/routes/app-router.tsx";
import { PLATFORM_ROUTE_CODECS } from "../../../src/presentation/routes/platform-route-codecs.ts";
import { createTestApplication } from "../../helpers/create-test-application.ts";
import { renderWithQueryProviders } from "../../helpers/query-providers.tsx";

const routeCodecs = Object.freeze({
  ...PLATFORM_ROUTE_CODECS,
  ...TECH_LOG_ROUTE_CODECS,
});

const routeComponents = {
  TECH_LOG_CASE: CasePage,
  TECH_LOG_REFERENCE: ReferencePage,
  TECH_LOG_QUESTION: QuestionPage,
  TECH_LOG_TOPIC: TopicPage,
} as const satisfies Record<string, ComponentType>;

type DocumentRouteId = keyof typeof routeComponents;

/** 머리말이 거는 주제 링크를 확인하기 위한 픽스처의 이름 → slug 대응. */
const topicSlugs: Readonly<Record<string, string>> = {
  JPA: "jpa",
  Authentication: "authentication",
  Redis: "redis",
};

class NoopIntersectionObserver implements IntersectionObserver {
  readonly root = null;
  readonly rootMargin = "0px";
  readonly scrollMargin = "0px";
  readonly thresholds = [0];

  disconnect() {}
  observe() {}
  takeRecords(): IntersectionObserverEntry[] {
    return [];
  }
  unobserve() {}
}

beforeEach(() => {
  vi.stubGlobal("IntersectionObserver", NoopIntersectionObserver);
});

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

async function renderDocumentRoute(routeId: DocumentRouteId, initialEntry: string) {
  const definition = TECH_LOG_ROUTE_REGISTRY[routeId];
  const runtime = TECH_LOG_ROUTE_RUNTIME_CONTRACT[routeId];
  const Component = routeComponents[routeId];
  const router = createMemoryRouter(
    createGroupedRouteObjects(
      {
        [routeId]: definition,
        NOT_FOUND: TECH_LOG_ROUTE_REGISTRY.NOT_FOUND,
      },
      {
        [routeId]: { moduleId: runtime.moduleId, Component },
        NOT_FOUND: {
          moduleId: TECH_LOG_ROUTE_RUNTIME_CONTRACT.NOT_FOUND.moduleId,
          Component: NotFoundPage,
        },
      },
      {
        PUBLIC: (
          <PublicShell>
            <Outlet />
          </PublicShell>
        ),
        STUDIO: <Outlet />,
      },
      "task-8-test-build",
      routeCodecs,
    ),
    { initialEntries: [initialEntry] },
  );
  const techLog = createTechLogFeatureInstalledInput(MOCK_STUDIO_INSTALL_CONTEXT).input;
  const view = render(
    renderWithQueryProviders(
    <ApplicationProvider
      application={createTestApplication({
        featureInputs: { "tech-log": techLog },
      })}
    >
      <RouterProvider router={router} />
    </ApplicationProvider>,
    ));
  // 포트가 async 가 되면서 첫 페인트에는 데이터가 없다. 화면이 정착한 뒤
  // 단언하도록 여기서 한 번 기다린다 — 각 테스트에 흩어 놓으면 빠뜨린 곳이 생긴다.
  await screen.findByRole("main");
  return { ...view, router };
}

describe("TechLog canonical Public documents", () => {
  it.each([
    {
      routeId: "TECH_LOG_CASE" as const,
      path: "/cases/collection-fetch-join-pagination",
      title: "컬렉션 Fetch Join과 페이징은 왜 충돌하는가",
      kind: "Case",
      topic: "JPA",
      project: "Backend Skeleton",
      published: "2026.08.11",
      evidence: "Join 결과 행 1,961개",
      relations: [
        "/questions/collection-fetch-join-with-pagination",
        "/projects/backend-skeleton/decisions#feed-pagination-boundary",
        "/references/jpa-list-fetch-strategy",
      ],
    },
    {
      routeId: "TECH_LOG_CASE" as const,
      path: "/cases/redis-adapter-ttl-boundary",
      title: "Redis Adapter가 도메인 TTL 정책을 소유하지 않는 이유",
      kind: "Case",
      topic: "Redis",
      project: "Backend Skeleton",
      published: "2026.08.07",
      evidence: "정책과 저장 명령의 주인을 구분하기",
      relations: [
        "/projects/backend-skeleton",
        "/projects/backend-skeleton/decisions#storage-port-unification",
      ],
    },
    {
      routeId: "TECH_LOG_REFERENCE" as const,
      path: "/references/state-and-nonce-boundary",
      title: "Authorization Code Flow에서 state와 nonce의 경계",
      kind: "Reference",
      topic: "Authentication",
      project: "Auth Lab",
      published: "2026.08.09",
      evidence: "state는 요청과 콜백을 연결합니다",
      relations: [
        "/questions/validate-edge-token-again",
        "/projects/auth-lab",
      ],
    },
    {
      routeId: "TECH_LOG_REFERENCE" as const,
      path: "/references/jpa-list-fetch-strategy",
      title: "JPA 목록 조회에서 Fetch 전략을 선택하는 기준",
      kind: "Reference",
      topic: "JPA",
      project: "Backend Skeleton",
      published: "2026.08.10",
      evidence: "부모 페이지 경계를 먼저 고정합니다",
      relations: [
        "/cases/collection-fetch-join-pagination",
        "/questions/collection-fetch-join-with-pagination",
      ],
    },
    {
      routeId: "TECH_LOG_QUESTION" as const,
      path: "/questions/validate-edge-token-again",
      title: "oauth2-proxy가 전달한 토큰을 다시 검증해야 하는가?",
      kind: "Open Question",
      topic: "Authentication",
      project: "Auth Lab",
      published: "2026.08.08",
      evidence: "토큰 전달안과 신뢰 헤더안을 위협 모델로 비교하고",
      relations: [
        "/references/state-and-nonce-boundary",
        "/projects/auth-lab/activity#edge-trust-boundary",
      ],
    },
    {
      routeId: "TECH_LOG_QUESTION" as const,
      path: "/questions/collection-fetch-join-with-pagination",
      title: "컬렉션 Fetch Join을 유지하면서 페이징할 수 있는가?",
      kind: "Open Question",
      topic: "JPA",
      project: "Backend Skeleton",
      published: "2026.08.05",
      evidence: "해결 과정을 Case로 읽기",
      relations: [
        "/cases/collection-fetch-join-pagination",
        "/references/jpa-list-fetch-strategy",
      ],
    },
  ])(
    "renders $path with exact metadata, evidence, and ordered relations",
    async ({ routeId, path, title, kind, topic, project, published, evidence, relations }) => {
      const { container } = await renderDocumentRoute(routeId, path);
      const main = screen.getByRole("main");

      expect(within(main).getByRole("heading", { level: 1, name: title })).toBeVisible();
      /*
        목차가 본문의 절 제목을 그대로 다시 적으므로 같은 글이 두 자리에 나온다. 여기서 확인하려는
        것은 "그 글이 문서에 있는가" 이므로 첫 자리로 충분하다.
      */
      const [firstEvidence] = within(main).getAllByText(evidence, { exact: false });
      expect(firstEvidence).toBeVisible();
      const breadcrumb = within(main).getByRole("navigation", { name: "문서 경로" });
      expect(breadcrumb).toHaveTextContent(`${kind}/${topic}/${project}`);
      /*
        글자만 보고 있었더니 주제 링크가 어디로 가는지는 아무도 묻지 않았다. 그 링크는
        `/topics/:slug` 를 가리켰고, 그 화면은 세 개의 주제를 하드코딩해 두고 있어 실제 주제는
        무엇이든 404 였다 — 게시한 모든 문서가 죽은 링크를 하나씩 달고 있었다.
      */
      expect(within(breadcrumb).getByRole("link", { name: topic })).toHaveAttribute(
        "href",
        `/explore?topic=${topicSlugs[topic]}`,
      );

      /*
        Case 는 한 배치를 쓴다. 예전에는 픽스처 문서 하나만 `.case-meta` 를 받고 나머지 Case 는
        `.public-document-header dl` 로 떨어졌으므로 여기도 경로로 갈랐다. 이제 유형으로 가른다.
      */
      if (kind === "Case") {
        expect(container.querySelector(".case-meta")).toHaveTextContent(`게시 ${published}`);
      } else {
        const metadata = container.querySelector(".public-document-header dl");
        expect(metadata).toHaveTextContent(`유형${kind}`);
        expect(metadata).toHaveTextContent(`프로젝트${project}`);
        expect(metadata).toHaveTextContent(`게시${published}`);
      }

      expect(
        Array.from(container.querySelectorAll(".document-relations li a"), (link) =>
          link.getAttribute("href"),
        ),
      ).toEqual(relations);
    },
  );

  it("preserves the specialized Fetch Join layout, TOC, rendered blocks, anchors, and evidence media", async () => {
    const { container } = await renderDocumentRoute(
      "TECH_LOG_CASE",
      "/cases/collection-fetch-join-pagination",
    );
    const main = screen.getByRole("main");

    expect(main).toHaveClass("case-page");
    expect(main.querySelector("header.shell.case-header")).not.toBeNull();
    expect(screen.getByRole("region", { name: "문제와 결론" })).toHaveTextContent(
      "FeedItem 20건을 요청했지만",
    );
    expect(screen.getByText("Fetch 전략별 페이징 경계 관찰")).toBeVisible();
    expect(screen.getByText("firstResult/maxResults specified with collection fetch; applying in memory")).toBeVisible();
    expect(screen.getAllByText("MultipleBagFetchException")).toHaveLength(2);
    expect(screen.getByRole("link", { name: "관찰한 값 바로가기" })).toHaveAttribute(
      "href",
      "#observed-values",
    );
    expect(screen.getAllByRole("navigation", { name: "문서 목차" })).toHaveLength(1);
    expect(container.querySelectorAll('[aria-label="코드 복사"]')).toHaveLength(3);

    const image = screen.getByRole("img", {
      name: "Fetch Join은 전체 조인 결과를 읽은 뒤 메모리에서 20개를 고르고, Batch Fetch는 부모 20개를 먼저 고른 뒤 해당 ID의 컬렉션만 조회한다.",
    });
    expect(image).toHaveAttribute("src", "/media/fetch-strategy-boundary.svg");
    expect(image).toHaveAttribute("width", "1080");
    expect(image).toHaveAttribute("height", "420");
    expect(image).toHaveAttribute("loading", "lazy");
  });

  it("uses the one Case layout and omits source relations for the canonical empty state", async () => {
    const generic = await renderDocumentRoute(
      "TECH_LOG_CASE",
      "/cases/redis-adapter-ttl-boundary",
    );
    expect(screen.getByRole("main")).toHaveClass("case-page");
    expect(generic.container.querySelector("#ownership")).toHaveTextContent(
      "정책과 저장 명령의 주인을 구분하기",
    );
    generic.unmount();

    const empty = await renderDocumentRoute(
      "TECH_LOG_CASE",
      "/cases/collection-fetch-join-pagination?state=relations-empty",
    );
    expect(empty.container.querySelector(".document-relations")).toBeNull();
    expect(screen.queryByText("Explicit relations")).not.toBeInTheDocument();
    expect(screen.queryByRole("heading", { name: "이 기록의 연결" })).not.toBeInTheDocument();
  });

  it("preserves Reference rule order and resolved Question evidence and empty copy", async () => {
    const reference = await renderDocumentRoute(
      "TECH_LOG_REFERENCE",
      "/references/state-and-nonce-boundary",
    );
    expect(
      Array.from(reference.container.querySelectorAll(".reference-rules h3"), (heading) =>
        heading.textContent,
      ),
    ).toEqual([
      "state는 요청과 콜백을 연결합니다",
      "nonce는 인증 결과와 ID Token을 연결합니다",
      "PKCE는 Code를 교환할 클라이언트를 증명합니다",
    ]);
    expect(screen.getByText("마지막 검증 2026.08.09")).toBeVisible();
    reference.unmount();

    await renderDocumentRoute(
      "TECH_LOG_QUESTION",
      "/questions/collection-fetch-join-with-pagination",
    );
    expect(screen.getByText("RESOLVED")).toHaveClass(
      "question-status",
      "question-status--resolved",
    );
    expect(screen.getByText("해결 과정에서 남은 미지수가 없습니다.")).toBeVisible();
    expect(screen.getByRole("link", { name: "해결 과정을 Case로 읽기" })).toHaveAttribute(
      "href",
      "/cases/collection-fetch-join-pagination",
    );
  });
});

describe("TechLog topics and Public not-found routing", () => {
  it.each([
    ["jpa", "JPA", "목록 조회, 연관 로딩과 페이지 경계를 함께 검증한 기록입니다.", "3개의 관련 기록"],
    ["authentication", "Authentication", "브라우저와 Edge, Resource Server 사이의 인증 책임과 신뢰 경계를 검증한 기록입니다.", "2개의 관련 기록"],
    ["redis", "Redis", "애플리케이션 정책과 Redis 저장 명령의 책임 경계를 검증한 기록입니다.", "1개의 관련 기록"],
  ])("aggregates /topics/%s with exact copy and count", async (slug, title, description, count) => {
    await renderDocumentRoute("TECH_LOG_TOPIC", `/topics/${slug}`);

    expect(screen.getByRole("heading", { level: 1, name: title })).toBeVisible();
    expect(screen.getByText(description)).toBeVisible();
    expect(screen.getByText(count)).toBeVisible();
  });

  it("keeps JPA topic records in canonical published order", async () => {
    const { container } = await renderDocumentRoute("TECH_LOG_TOPIC", "/topics/jpa");

    expect(
      Array.from(container.querySelectorAll(".public-record-list > li > a"), (link) =>
        link.getAttribute("href"),
      ),
    ).toEqual([
      "/cases/collection-fetch-join-pagination",
      "/references/jpa-list-fetch-strategy",
      "/questions/collection-fetch-join-with-pagination",
    ]);
  });

  it.each([
    ["TECH_LOG_CASE" as const, "/cases/not-registered"],
    ["TECH_LOG_REFERENCE" as const, "/references/not-registered"],
    ["TECH_LOG_QUESTION" as const, "/questions/not-registered"],
    ["TECH_LOG_TOPIC" as const, "/topics/not-registered"],
  ])("keeps the unreachable client fallback accessible for %s", async (routeId, path) => {
    const { container, router } = await renderDocumentRoute(routeId, path);

    expect(router.state.location.pathname).toBe(path);
    expect(
      await screen.findByRole("heading", { name: "페이지를 찾을 수 없습니다." }),
    ).toBeVisible();
    expect(screen.queryByRole("heading", { name: "화면을 표시하지 못했습니다." })).not.toBeInTheDocument();
    expect(container.querySelector(".site-frame")).not.toBeNull();
  });
});