// @vitest-environment jsdom

import {
  QueryClient,
  QueryClientProvider,
} from "@tanstack/react-query";
import { render, screen, waitFor } from "@testing-library/react";
import userEvent from "@testing-library/user-event";
import { describe, expect, it, vi } from "vitest";

import { createDemoSessionAdapter } from "../../../src/adapters/auth/external-session-adapter.ts";
import type { AuthSessionPort } from "../../../src/application/ports/auth-session-port.ts";
import type { MutationIntentFactory } from "../../../src/application/ports/mutation-intent-factory.ts";
import type {
  ReferenceFeatureInput,
  ReferenceResult,
} from "../../../src/features/reference-feature/application/reference-feature-api.ts";
import { REFERENCE_FEATURE_ID } from "../../../src/features/reference-feature/contracts/reference-feature-contract.ts";
import type { ReferenceResourceView } from "../../../src/features/reference-feature/contracts/reference-mapper.ts";
import { createFailure } from "../../../src/contracts/errors.ts";
import type { QueryInvalidationCoordinator } from "../../../src/contracts/query-invalidation.ts";
import { QueryInvalidationProvider } from "../../../src/presentation/adapters/query/query-invalidation-provider.tsx";
import { MutationIntentProvider } from "../../../src/presentation/adapters/query/mutation-intent-provider.tsx";
import { ServerStateScopeProvider } from "../../../src/presentation/adapters/query/server-state-scope-provider.tsx";
import { createServerStateScopeRuntime } from "../../../src/adapters/query-cache/server-state-scope-runtime.ts";
import { ApplicationProvider } from "../../../src/presentation/providers/application-provider.tsx";
import { AppRouter } from "../../../src/presentation/routes/app-router.tsx";
import { createTestApplication } from "../../helpers/create-test-application.ts";

function renderReference(
  input: ReferenceFeatureInput,
  url = "/examples/reference-resources?limit=5",
  session: AuthSessionPort = createDemoSessionAdapter("authenticated"),
) {
  window.history.pushState({}, "", url);
  const client = new QueryClient({
    defaultOptions: {
      queries: { retry: false, gcTime: Infinity },
      mutations: { retry: false },
    },
  });
  const invalidation: QueryInvalidationCoordinator = Object.freeze({
    async invalidate() {},
    beginMutation() {
      return Object.freeze({
        async release() {},
      });
    },
    async resetLocal() {},
    dispose() {},
  });
  const serverStateScope = createServerStateScopeRuntime({
    session,
    queryInvalidation: invalidation,
  });
  let intentSequence = 0;
  const mutationIntentFactory: MutationIntentFactory = Object.freeze({
    create(input) {
      intentSequence += 1;
      return Object.freeze({
        intentId: `reference-page-intent-${intentSequence}`,
        operationId: input.operationId,
        canonicalInputIdentity: input.canonicalInputIdentity,
        ...(input.requiresIdempotencyKey
          ? { idempotencyKey: `reference-page-key-${intentSequence}` }
          : {}),
        createdAtMonotonicMs: intentSequence,
      });
    },
  });
  return render(
    <MutationIntentProvider factory={mutationIntentFactory}>
      <QueryClientProvider client={client}>
        <ServerStateScopeProvider runtime={serverStateScope}>
          <QueryInvalidationProvider coordinator={invalidation}>
            <ApplicationProvider
              application={createTestApplication({
                session,
                featureInputs: { [REFERENCE_FEATURE_ID]: input },
              })}
            >
              <AppRouter />
            </ApplicationProvider>
          </QueryInvalidationProvider>
        </ServerStateScopeProvider>
      </QueryClientProvider>
    </MutationIntentProvider>,
  );
}

function inputWith(
  overrides: Partial<ReferenceFeatureInput> = {},
): ReferenceFeatureInput {
  return {
    listResources: async () => ({ ok: true, value: [] }),
    createResource: async ({ name }) => ({
      ok: true,
      value: {
        resourceId: "created",
        title: name,
        createdAt: null,
      },
    }),
    getResource: async (resourceId) => ({
      ok: true,
      value: {
        resourceId,
        title: "Detail",
        createdAt: null,
      },
    }),
    ...overrides,
  };
}

describe("reference feature page states", () => {
  it("renders loading, success and empty states through the installed route", async () => {
    let resolveList:
      | ((result: ReferenceResult<readonly ReferenceResourceView[]>) => void)
      | undefined;
    const pending = new Promise<
      ReferenceResult<readonly ReferenceResourceView[]>
    >((resolve) => {
      resolveList = resolve;
    });
    const loaded = renderReference(
      inputWith({ listResources: async () => pending }),
    );
    expect(await screen.findByLabelText("불러오는 중")).toBeVisible();
    resolveList?.({
      ok: true,
      value: [
        {
          resourceId: "reference-1",
          title: "Loaded",
          createdAt: null,
        },
      ],
    });
    expect(await screen.findByText("Loaded")).toBeVisible();
    loaded.unmount();

    renderReference(inputWith(), "/examples/reference-resources?limit=10");
    expect(
      await screen.findByRole("heading", {
        name: "표시할 항목이 없습니다.",
      }),
    ).toBeVisible();
  });

  it("rejects invalid URL input before the feature application input", async () => {
    const listResources = vi.fn();
    renderReference(
      inputWith({ listResources }),
      "/examples/reference-resources?limit=invalid",
    );
    expect(
      await screen.findByRole("heading", {
        name: "올바르지 않은 주소입니다.",
      }),
    ).toBeVisible();
    expect(listResources).not.toHaveBeenCalled();
  });

  it("renders backend forbidden even when the client access hint allowed entry", async () => {
    const user = userEvent.setup();
    renderReference(
      inputWith({
        listResources: async () => ({
          ok: false,
          error: createFailure(
            "FORBIDDEN",
            "LIST_REFERENCE_RESOURCES",
            0,
          ),
        }),
      }),
    );
    expect(await screen.findByRole("alert")).toHaveTextContent(
      "이 작업을 수행할 권한이 없습니다.",
    );
    await user.click(
      screen.getByRole("button", { name: "안전한 화면으로 이동" }),
    );
    expect(
      await screen.findByRole("heading", {
        level: 1,
        name: "Clean Architecture Frontend",
      }),
    ).toBeVisible();
  });

  it("starts sign-in with the current route for a backend auth failure", async () => {
    const user = userEvent.setup();
    const demoSession = createDemoSessionAdapter("authenticated");
    const beginSignIn = vi.fn(async () => {});
    const session = { ...demoSession, beginSignIn };
    renderReference(
      inputWith({
        listResources: async () => ({
          ok: false,
          error: createFailure(
            "AUTH_REQUIRED",
            "LIST_REFERENCE_RESOURCES",
            0,
          ),
        }),
      }),
      "/examples/reference-resources?limit=5",
      session,
    );

    await user.click(await screen.findByRole("button", { name: "로그인" }));
    expect(beginSignIn).toHaveBeenCalledWith(
      "/examples/reference-resources?limit=5",
    );
  });

  it("falls back to a public route when starting sign-in fails", async () => {
    const user = userEvent.setup();
    const demoSession = createDemoSessionAdapter("authenticated");
    const beginSignIn = vi.fn(async () => {
      throw new Error("identity provider unavailable");
    });
    renderReference(
      inputWith({
        listResources: async () => ({
          ok: false,
          error: createFailure(
            "AUTH_REQUIRED",
            "LIST_REFERENCE_RESOURCES",
            0,
          ),
        }),
      }),
      "/examples/reference-resources?limit=5",
      { ...demoSession, beginSignIn },
    );

    await user.click(await screen.findByRole("button", { name: "로그인" }));
    expect(
      await screen.findByRole("heading", {
        level: 1,
        name: "Clean Architecture Frontend",
      }),
    ).toBeVisible();
  });

  it("deduplicates create, preserves input and surfaces a conflict", async () => {
    const user = userEvent.setup();
    let finish:
      | ((result: ReferenceResult<ReferenceResourceView>) => void)
      | undefined;
    const createResource = vi.fn(
      () =>
        new Promise<ReferenceResult<ReferenceResourceView>>((resolve) => {
          finish = resolve;
        }),
    );
    renderReference(
      inputWith({ createResource }),
      "/examples/reference-resources/new",
    );
    await screen.findByRole("heading", {
      name: "Reference resource 만들기",
    });
    await user.type(
      screen.getByRole("textbox", { name: /새 항목 이름/ }),
      "Conflicting",
    );
    await user.type(screen.getByLabelText("설명"), "Keep this input");
    const submit = screen.getByRole("button", { name: "저장" });
    await user.dblClick(submit);

    await waitFor(() => expect(createResource).toHaveBeenCalledOnce());
    expect(screen.getByRole("button", { name: "저장 중…" })).toBeDisabled();

    finish?.({
      ok: false,
      error: createFailure(
        "CONFLICT",
        "CREATE_REFERENCE_RESOURCE",
        0,
        { effect: "NOT_APPLIED" },
      ),
    });
    expect(await screen.findByText(/다른 변경과 충돌했습니다/)).toBeVisible();
    expect(
      screen.getByRole("textbox", { name: /새 항목 이름/ }),
    ).toHaveValue("Conflicting");
    expect(screen.getByLabelText("설명")).toHaveValue("Keep this input");
  });

  it("blocks resubmit and exposes only reconciliation for an unknown create effect", async () => {
    const user = userEvent.setup();
    const createResource = vi.fn(async () => ({
      ok: false as const,
      error: createFailure(
        "SERVER_FAILURE",
        "CREATE_REFERENCE_RESOURCE",
        0,
        { effect: "MAYBE_APPLIED" },
      ),
    }));
    renderReference(
      inputWith({ createResource }),
      "/examples/reference-resources/new",
    );
    await user.type(
      await screen.findByRole("textbox", { name: /새 항목 이름/ }),
      "Unknown result",
    );
    await user.click(screen.getByRole("button", { name: "저장" }));

    expect(
      await screen.findByText("변경 결과를 확인할 수 없습니다."),
    ).toBeVisible();
    expect(screen.getByRole("button", { name: "저장" })).toBeDisabled();
    expect(
      screen.queryByText("저장하지 못했습니다. 잠시 후 다시 시도해 주세요."),
    ).not.toBeInTheDocument();
    await user.click(screen.getByRole("button", { name: "저장" }));
    expect(createResource).toHaveBeenCalledOnce();
    expect(
      screen.getByRole("textbox", { name: /새 항목 이름/ }),
    ).toHaveValue("Unknown result");

    await user.click(
      screen.getByRole("button", { name: "변경되지 않음으로 확인" }),
    );
    await waitFor(() =>
      expect(screen.getByRole("button", { name: "저장" })).toBeEnabled(),
    );
    expect(createResource).toHaveBeenCalledOnce();
    expect(
      screen.getByRole("textbox", { name: /새 항목 이름/ }),
    ).toHaveValue("Unknown result");
  });

  it("settles the form after confirming an unknown create was applied", async () => {
    const user = userEvent.setup();
    const createResource = vi.fn(async () => ({
      ok: false as const,
      error: createFailure(
        "SERVER_FAILURE",
        "CREATE_REFERENCE_RESOURCE",
        0,
        { effect: "MAYBE_APPLIED" },
      ),
    }));
    renderReference(
      inputWith({ createResource }),
      "/examples/reference-resources/new",
    );
    const name = await screen.findByRole("textbox", {
      name: /새 항목 이름/,
    });
    await user.type(name, "Already created");
    await user.click(screen.getByRole("button", { name: "저장" }));
    await user.click(
      await screen.findByRole("button", { name: "변경됨으로 확인" }),
    );

    expect(await screen.findByRole("status")).toHaveTextContent("저장했습니다.");
    expect(name).toHaveValue("");
    await user.click(screen.getByRole("button", { name: "저장" }));
    expect(createResource).toHaveBeenCalledOnce();
  });

  it("treats an applied-confirmed failure as a settled create", async () => {
    const user = userEvent.setup();
    const createResource = vi.fn(async () => ({
      ok: false as const,
      error: createFailure(
        "SERVER_FAILURE",
        "CREATE_REFERENCE_RESOURCE",
        0,
        { effect: "APPLIED_CONFIRMED" },
      ),
    }));
    renderReference(
      inputWith({ createResource }),
      "/examples/reference-resources/new",
    );
    const name = await screen.findByRole("textbox", {
      name: /새 항목 이름/,
    });
    await user.type(name, "Committed despite response");
    await user.click(screen.getByRole("button", { name: "저장" }));

    expect(await screen.findByRole("status")).toHaveTextContent("저장했습니다.");
    expect(name).toHaveValue("");
    expect(
      screen.queryByText("저장하지 못했습니다. 잠시 후 다시 시도해 주세요."),
    ).not.toBeInTheDocument();
    await user.click(screen.getByRole("button", { name: "저장" }));
    expect(createResource).toHaveBeenCalledOnce();
  });

  it("keeps stale data visible during refresh failure and recovers on retry", async () => {
    const user = userEvent.setup();
    const listResources = vi
      .fn<ReferenceFeatureInput["listResources"]>()
      .mockResolvedValueOnce({
        ok: true,
        value: [
          {
            resourceId: "existing",
            title: "Existing",
            createdAt: null,
          },
        ],
      })
      .mockResolvedValueOnce({
        ok: false,
        error: createFailure(
          "SERVER_FAILURE",
          "LIST_REFERENCE_RESOURCES",
          0,
        ),
      })
      .mockResolvedValue({
        ok: true,
        value: [
          {
            resourceId: "recovered",
            title: "Recovered",
            createdAt: null,
          },
        ],
      });
    renderReference(inputWith({ listResources }));
    await screen.findByText("Existing");
    await user.click(screen.getByRole("button", { name: "새로고침" }));

    expect(
      await screen.findByText("기존 정보를 표시하고 있습니다."),
    ).toBeVisible();
    expect(screen.getByText("Existing")).toBeVisible();
    await user.click(screen.getByRole("button", { name: "다시 시도" }));
    expect(await screen.findByText("Recovered")).toBeVisible();
    await waitFor(() =>
      expect(screen.queryByText("stale-degraded")).not.toBeInTheDocument(),
    );
    expect(listResources).toHaveBeenCalledTimes(3);
  });
});