import { act, screen, waitFor } from "@testing-library/react";
import userEvent from "@testing-library/user-event";
import { readFileSync } from "node:fs";
import { join } from "node:path";
import { beforeEach, describe, expect, it } from "vitest";
import { setToken } from "../auth/token.ts";
import settings from "../board/__fixtures__/settings.json";
import { json, mockFetch } from "../test/fetchMock.ts";
import { renderWithProviders } from "../test/render.tsx";
import { IssuesPage } from "./IssuesPage.tsx";

const SNAP = JSON.parse(readFileSync(join(import.meta.dirname, "..", "board", "__fixtures__", "hub-basic.board.json"), "utf8"));
const row = (n: number) => ({ ...SNAP.issues[1], key: `AURORA-${9000 + n}`, summary: `Задача ${n}`, fetched_at: "" });

function hub(pages: (params: URLSearchParams) => unknown[]) {
  return mockFetch((_m, url) => {
    if (url.pathname === "/settings") return json(200, settings);
    if (url.pathname === "/board") return json(200, SNAP);
    if (url.pathname === "/issues") return json(200, { issues: pages(url.searchParams) });
    return json(404, {});
  });
}
const issuesCalls = (fetch: ReturnType<typeof hub>) =>
  fetch.mock.calls.map(([u]) => new URL(String(u), "http://hub.test")).filter((u) => u.pathname === "/issues");

describe("список задач", () => {
  beforeEach(() => setToken("tok"));

  it("фильтры из адреса уходят в GET /issues; ключ ведёт на карточку", async () => {
    const fetch = hub(() => [row(1)]);
    renderWithProviders(<IssuesPage />, { route: "/issues?sprint=AWPCA_Спринт 2&neighbor=1", path: "/issues" });
    expect(await screen.findByRole("link", { name: "AURORA-9001" })).toHaveAttribute("href", "/issues/AURORA-9001");
    const q = issuesCalls(fetch)[0].searchParams;
    expect(q.get("sprint")).toBe("AWPCA_Спринт 2");
    expect(q.get("neighbor")).toBe("1");
    expect(q.get("limit")).toBe("50");
    expect(q.get("offset")).toBe("0");
  });

  it("выбор исполнителя пишет его в адрес и в запрос", async () => {
    const fetch = hub(() => [row(1)]);
    const { router } = renderWithProviders(<IssuesPage />, { route: "/issues", path: "/issues" });
    await screen.findByRole("link", { name: "AURORA-9001" });
    await userEvent.selectOptions(screen.getByLabelText("Исполнитель"), "Петров Пётр Петрович");
    await waitFor(() => expect(router.state.location.search).toContain("assignee="));
    await waitFor(() => expect(issuesCalls(fetch).at(-1)!.searchParams.get("assignee")).toBe("Петров Пётр Петрович"));
  });

  it("«Показать ещё» до неполной порции", async () => {
    const fetch = hub((p) => (p.get("offset") === "0" ? Array.from({ length: 50 }, (_, i) => row(i + 1)) : Array.from({ length: 17 }, (_, i) => row(i + 51))));
    renderWithProviders(<IssuesPage />, { route: "/issues", path: "/issues" });
    await userEvent.click(await screen.findByRole("button", { name: "Показать ещё" }));
    await waitFor(() => expect(screen.getAllByRole("row")).toHaveLength(1 + 67));
    expect(screen.queryByRole("button", { name: "Показать ещё" })).toBeNull();
    expect(issuesCalls(fetch).at(-1)!.searchParams.get("offset")).toBe("50");
  });

  it("поиск — один запрос после паузы ввода", async () => {
    const fetch = hub(() => [row(1)]);
    renderWithProviders(<IssuesPage />, { route: "/issues", path: "/issues" });
    await screen.findByRole("link", { name: "AURORA-9001" });
    const before = issuesCalls(fetch).length;
    await userEvent.type(screen.getByLabelText("Поиск по ключу или теме"), "свод");
    await waitFor(() => expect(issuesCalls(fetch).at(-1)!.searchParams.get("q")).toBe("свод"));
    expect(issuesCalls(fetch).length).toBe(before + 1);
  });

  it("хаб не отвечает — сообщение и «Повторить»", async () => {
    let down = true;
    mockFetch((_m, url) => {
      if (url.pathname === "/issues" && down) throw new TypeError("Failed to fetch");
      if (url.pathname === "/settings") return json(200, settings);
      if (url.pathname === "/board") return json(200, SNAP);
      return json(200, { issues: [row(1)] });
    });
    renderWithProviders(<IssuesPage />, { route: "/issues", path: "/issues" });
    expect(await screen.findByRole("alert")).toHaveTextContent("хаб не отвечает");
    down = false;
    await userEvent.click(screen.getByRole("button", { name: "Повторить" }));
    expect(await screen.findByRole("link", { name: "AURORA-9001" })).toBeInTheDocument();
  });

  it("эпик показывается названием из снимка", async () => {
    hub(() => [row(1)]);
    renderWithProviders(<IssuesPage />, { route: "/issues", path: "/issues" });
    expect(await screen.findByRole("cell", { name: "Тестовый эпик" })).toBeInTheDocument();
  });

  it("T13.2: внешняя смена адреса обновляет поле поиска и не перезаписывается через 300 мс", async () => {
    hub(() => [row(1)]);
    const { router } = renderWithProviders(<IssuesPage />, { route: "/issues?q=свод", path: "/issues" });
    const box = await screen.findByLabelText("Поиск по ключу или теме");
    expect(box).toHaveValue("свод");
    await act(async () => { await router.navigate("/issues"); });
    await waitFor(() => expect(box).toHaveValue(""));
    await new Promise((r) => setTimeout(r, 450));
    expect(router.state.location.search).toBe("");
    expect(box).toHaveValue("");
  });

  it("T13.2: ввод поиска пишется в адрес через replace (шаг «назад» не застревает)", async () => {
    hub(() => [row(1)]);
    const { router } = renderWithProviders(<IssuesPage />, { route: "/issues", path: "/issues" });
    await screen.findByRole("link", { name: "AURORA-9001" });
    const before = router.state.historyAction;
    await userEvent.type(screen.getByLabelText("Поиск по ключу или теме"), "свод");
    await waitFor(() => expect(router.state.location.search).toBe("?q=%D1%81%D0%B2%D0%BE%D0%B4"));
    expect(before).toBe("POP");
    expect(router.state.historyAction).toBe("REPLACE");
  });
});