// @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.js";
import type {
  ReferenceFeatureInput,
  ReferenceResult,
} from "../../../src/features/reference-feature/application/reference-feature-api.js";
import { REFERENCE_FEATURE_ID } from "../../../src/features/reference-feature/contracts/reference-feature-contract.js";
import type { ReferenceResourceView } from "../../../src/features/reference-feature/contracts/reference-mapper.js";
import { createFailure } from "../../../src/contracts/errors.js";
import { ApplicationProvider } from "../../../src/presentation/providers/application-provider.js";
import { AppRouter } from "../../../src/presentation/routes/app-router.js";
import { createTestApplication } from "../../helpers/create-test-application.js";

function renderReference(
  input: ReferenceFeatureInput,
  url = "/examples/reference-resources?limit=5",
) {
  window.history.pushState({}, "", url);
  const client = new QueryClient({
    defaultOptions: {
      queries: { retry: false, gcTime: Infinity },
      mutations: { retry: false },
    },
  });
  return render(
    <QueryClientProvider client={client}>
      <ApplicationProvider
        application={createTestApplication({
          session: createDemoSessionAdapter("authenticated"),
          featureInputs: { [REFERENCE_FEATURE_ID]: input },
        })}
      >
        <AppRouter />
      </ApplicationProvider>
    </QueryClientProvider>,
  );
}

function inputWith(
  overrides: Partial<ReferenceFeatureInput> = {},
): ReferenceFeatureInput {
  return {
    listResources: async () => ({ ok: true, value: [] }),
    createResource: async ({ name }) => ({
      ok: true,
      value: {
        resourceId: "created",
        title: name,
        createdAtLabel: 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",
          createdAtLabel: 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 () => {
    renderReference(
      inputWith({
        listResources: async () => ({
          ok: false,
          error: createFailure(
            "FORBIDDEN",
            "LIST_REFERENCE_RESOURCES",
            0,
          ),
        }),
      }),
    );
    expect(await screen.findByRole("alert")).toHaveTextContent(
      "이 작업을 수행할 권한이 없습니다.",
    );
  });

  it("deduplicates optimistic create and rolls back 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({
        listResources: async () => ({
          ok: true,
          value: [
            {
              resourceId: "existing",
              title: "Existing",
              createdAtLabel: null,
            },
          ],
        }),
        createResource,
      }),
    );
    await screen.findByText("Existing");
    await user.type(screen.getByLabelText("새 항목 이름"), "Conflicting");
    const submit = screen.getByRole("button", { name: "추가" });
    await user.dblClick(submit);

    await waitFor(() => expect(createResource).toHaveBeenCalledOnce());
    expect(await screen.findByText("Conflicting")).toHaveAttribute(
      "data-optimistic",
      "true",
    );
    expect(screen.getByText("mutation-pending")).toBeVisible();

    finish?.({
      ok: false,
      error: createFailure(
        "CONFLICT",
        "CREATE_REFERENCE_RESOURCE",
        0,
      ),
    });
    expect(
      await screen.findByRole("button", { name: "충돌 해결" }),
    ).toBeVisible();
    expect(screen.queryByText("Conflicting")).not.toBeInTheDocument();
    await user.click(screen.getByRole("button", { name: "충돌 해결" }));
    await waitFor(() =>
      expect(screen.queryByText("mutation-conflict")).not.toBeInTheDocument(),
    );
  });

  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",
            createdAtLabel: null,
          },
        ],
      })
      .mockResolvedValueOnce({
        ok: false,
        error: createFailure(
          "SERVER_FAILURE",
          "LIST_REFERENCE_RESOURCES",
          0,
        ),
      })
      .mockResolvedValue({
        ok: true,
        value: [
          {
            resourceId: "recovered",
            title: "Recovered",
            createdAtLabel: null,
          },
        ],
      });
    renderReference(inputWith({ listResources }));
    await screen.findByText("Existing");
    await user.type(screen.getByLabelText("새 항목 이름"), "Created");
    await user.click(screen.getByRole("button", { name: "추가" }));

    expect(await screen.findByText("stale-degraded")).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);
  });
});