// @vitest-environment jsdom
//
// E22.6: the admin log console. A request id narrows the list to that request (and says so, in the
// filter row and the URL); a filter value the facets no longer count stays pickable; "Live" watches
// the newest page only, and stops on a failed read instead of re-raising it; a failed read is an
// error, not an empty log; Copy takes every loaded line, oldest first.
import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
import { act, cleanup, fireEvent, render, screen, waitFor, within } from "@testing-library/react";
import { QueryClient, QueryClientProvider } from "@tanstack/react-query";

import type { LogFacets, LogPage, LogQuery, ServerLogRow } from "../lib/api";

vi.mock("react-i18next", async (importOriginal) => {
  const actual = await importOriginal<typeof import("react-i18next")>();
  return {
    ...actual,
    useTranslation: () => ({
      t: (key: string, vars?: Record<string, unknown>) =>
        vars?.id != null ? `${key}:${String(vars.id)}` : key,
      i18n: { language: "en" },
    }),
  };
});

const logsMock = vi.fn<(query: LogQuery, before: string | null) => Promise<LogPage>>();
const facetsMock = vi.fn<(query: LogQuery) => Promise<LogFacets>>();
vi.mock("../lib/api", async (importOriginal) => {
  const actual = await importOriginal<typeof import("../lib/api")>();
  return {
    ...actual,
    api: {
      ...actual.api,
      adminLogs: (query: LogQuery, before: string | null) => logsMock(query, before),
      adminLogFacets: (query: LogQuery) => facetsMock(query),
    },
  };
});

const copied: string[] = [];
vi.mock("../lib/clipboard", () => ({
  copyText: (text: string) => {
    copied.push(text);
    return Promise.resolve(true);
  },
}));

import AdminLogs from "./AdminLogs";

function row(id: number, extra: Partial<ServerLogRow> = {}): ServerLogRow {
  return {
    id,
    ts: new Date(Date.UTC(2026, 8, 19, 12, 0, id)).toISOString(),
    level: "INFO",
    source: "api",
    logger: "siftlode.http",
    event: "http.request",
    msg: `GET /api/thing/${id} 200`,
    attrs: null,
    exc: null,
    request_id: `req-${String(id).padStart(8, "0")}`,
    user_id: 1,
    job_id: null,
    debug_session_id: null,
    version: "0.90.0",
    ...extra,
  };
}

const FACETS: LogFacets = {
  levels: [{ value: "INFO", count: 3 }],
  sources: [{ value: "api", count: 3 }],
  events: [{ value: "http.request", count: 3 }],
  users: [{ value: "1", count: 3 }],
  accounts: { "1": "admin@example.com" },
  total: 3,
};

function renderConsole() {
  const qc = new QueryClient({ defaultOptions: { queries: { retry: false } } });
  return render(
    <QueryClientProvider client={qc}>
      <AdminLogs />
    </QueryClientProvider>,
  );
}

// react-query hands its updates to React on a (real) timer tick, after the promise that caused them.
const settle = () => act(() => new Promise((resolve) => setTimeout(resolve, 20)));

const lines = () =>
  within(screen.getByTestId("admin-logs-lines"))
    .queryAllByRole("button")
    .filter((b) => b.hasAttribute("aria-expanded"));

beforeEach(() => {
  window.history.replaceState(null, "", "/?page=logs");
  facetsMock.mockResolvedValue(FACETS);
});
afterEach(() => {
  vi.useRealTimers();
  cleanup();
  logsMock.mockReset();
  facetsMock.mockReset();
});

describe("AdminLogs", () => {
  it("a request id narrows the list to that request, with every other filter off", async () => {
    window.history.replaceState(null, "", "/?page=logs&lgrp=error&lq=boom");
    logsMock.mockResolvedValue({ items: [row(1)], accounts: {}, next_cursor: null });
    renderConsole();

    await waitFor(() => expect(lines()).toHaveLength(1));
    fireEvent.click(lines()[0]!);
    fireEvent.click(screen.getByRole("button", { name: "req-00000001" }));

    await waitFor(() =>
      expect(logsMock).toHaveBeenLastCalledWith(
        expect.objectContaining({ request_id: "req-00000001", levels: undefined, q: undefined }),
        null,
      ),
    );
    expect(screen.getByText("adminLogs.pivotRequest:req-00000001")).toBeTruthy();
    const url = new URLSearchParams(window.location.search);
    expect([url.get("lreq"), url.get("lgrp"), url.get("lq")]).toEqual(["req-00000001", null, null]);
  });

  it("Back from a request's lines returns to the view the pivot was made from", async () => {
    window.history.replaceState({ sfPage: "logs" }, "", "/?page=logs&lgrp=error&lq=boom");
    const depth = window.history.length;
    logsMock.mockResolvedValue({ items: [row(1)], accounts: {}, next_cursor: null });
    renderConsole();
    await waitFor(() => expect(lines()).toHaveLength(1));
    fireEvent.click(lines()[0]!);
    fireEvent.click(screen.getByRole("button", { name: "req-00000001" }));
    await waitFor(() =>
      expect(screen.getByText("adminLogs.pivotRequest:req-00000001")).toBeTruthy(),
    );
    expect(window.history.length).toBe(depth + 1);

    await act(async () => {
      const landed = new Promise((resolve) =>
        window.addEventListener("popstate", resolve, { once: true }),
      );
      window.history.back();
      await landed;
    });

    await waitFor(() =>
      expect(logsMock).toHaveBeenLastCalledWith(
        expect.objectContaining({
          request_id: undefined,
          levels: ["ERROR", "CRITICAL"],
          q: "boom",
        }),
        null,
      ),
    );
    expect(screen.queryByText("adminLogs.pivotRequest:req-00000001")).toBeNull();
    const url = new URLSearchParams(window.location.search);
    expect([url.get("lreq"), url.get("lgrp"), url.get("lq")]).toEqual([null, "error", "boom"]);
    // Neither jump waited out the typing debounce: no read ever mixed one view's filters with the
    // other's search text (the request with "boom", or the restored view without it).
    const mixed = logsMock.mock.calls.filter(([q]) => (q.request_id != null) === (q.q === "boom"));
    expect(mixed).toEqual([]);
  });

  it("keeps the account in use offered when the facets no longer count it", async () => {
    window.history.replaceState(null, "", "/?page=logs&lu=7");
    logsMock.mockResolvedValue({ items: [], accounts: {}, next_cursor: null });
    renderConsole();
    await waitFor(() => expect(facetsMock).toHaveBeenCalled());

    fireEvent.click(screen.getByTestId("logs-user"));

    expect(await screen.findByTestId("logs-user-7")).toBeTruthy();
    expect(screen.getByTestId("logs-user-1")).toBeTruthy();
  });

  it("Live watches the newest page only", async () => {
    logsMock.mockImplementation(async (_q, before) =>
      before === null
        ? { items: [row(3), row(2)], accounts: {}, next_cursor: "c1" }
        : { items: [row(1)], accounts: {}, next_cursor: null },
    );
    renderConsole();
    await waitFor(() => expect(lines()).toHaveLength(2));
    fireEvent.click(screen.getByRole("button", { name: "adminLogs.older" }));
    await waitFor(() => expect(lines()).toHaveLength(3));

    fireEvent.click(screen.getByRole("button", { name: "adminLogs.live" }));

    await waitFor(() => expect(lines()).toHaveLength(2));
    expect(
      screen.getByRole("button", { name: "adminLogs.live" }).getAttribute("aria-pressed"),
    ).toBe("true");
  });

  it("a page that lands after Live went on is dropped at the next tick", async () => {
    let landOlder!: (page: LogPage) => void;
    logsMock.mockImplementation((_q, before) =>
      before === null
        ? Promise.resolve({ items: [row(3), row(2)], accounts: {}, next_cursor: "c1" })
        : new Promise<LogPage>((resolve) => (landOlder = resolve)),
    );
    renderConsole();
    await waitFor(() => expect(lines()).toHaveLength(2));
    fireEvent.click(screen.getByRole("button", { name: "adminLogs.older" }));
    await waitFor(() => expect(landOlder).toBeTypeOf("function"));

    vi.useFakeTimers({ toFake: ["setInterval", "clearInterval"] });
    fireEvent.click(screen.getByRole("button", { name: "adminLogs.live" }));
    await act(async () => landOlder({ items: [row(1)], accounts: {}, next_cursor: null }));
    await settle();
    expect(lines()).toHaveLength(3);
    const olderReads = logsMock.mock.calls.filter(([, before]) => before !== null).length;

    await act(async () => vi.advanceTimersByTimeAsync(4000));
    await settle();

    expect(lines()).toHaveLength(2);
    expect(logsMock.mock.calls.filter(([, before]) => before !== null)).toHaveLength(olderReads);
  });

  it("a failed live read stops the polling and says the list may be old", async () => {
    logsMock.mockResolvedValueOnce({ items: [row(1)], accounts: {}, next_cursor: null });
    renderConsole();
    await waitFor(() => expect(lines()).toHaveLength(1));

    logsMock.mockRejectedValue(new Error("500"));
    vi.useFakeTimers({ toFake: ["setInterval", "clearInterval"] });
    fireEvent.click(screen.getByRole("button", { name: "adminLogs.live" }));
    await act(async () => vi.advanceTimersByTimeAsync(4000));
    await settle();

    expect(screen.getByRole("alert").textContent).toContain("adminLogs.stale");
    expect(lines()).toHaveLength(1);
    const reads = logsMock.mock.calls.length;
    await act(async () => vi.advanceTimersByTimeAsync(12000));
    expect(logsMock.mock.calls.length).toBe(reads);
    // The button says polling stopped, and pressing it reads again.
    const liveButton = screen.getByRole("button", { name: "adminLogs.live" });
    expect(liveButton.getAttribute("aria-pressed")).toBe("false");
    fireEvent.click(liveButton);
    await settle();
    expect(logsMock.mock.calls.length).toBe(reads + 1);
  });

  it("a failed older page says so, not that the list is out of date", async () => {
    logsMock.mockImplementation(async (_q, before) => {
      if (before !== null) throw new Error("500");
      return { items: [row(2)], accounts: {}, next_cursor: "c1" };
    });
    renderConsole();
    await waitFor(() => expect(lines()).toHaveLength(1));

    fireEvent.click(screen.getByRole("button", { name: "adminLogs.older" }));

    expect((await screen.findByRole("alert")).textContent).toContain("adminLogs.olderFailed");
  });

  it("offers no older page while a filter change loads", async () => {
    let landErrors!: (page: LogPage) => void;
    logsMock.mockImplementation((q) =>
      q.levels
        ? new Promise<LogPage>((resolve) => (landErrors = resolve))
        : Promise.resolve({ items: [row(2)], accounts: {}, next_cursor: "c1" }),
    );
    renderConsole();
    await waitFor(() => expect(lines()).toHaveLength(1));
    expect(screen.queryByRole("button", { name: "adminLogs.older" })).toBeTruthy();

    fireEvent.click(screen.getByRole("button", { name: /settings\.myLog\.filters\.error/ }));
    await waitFor(() => expect(landErrors).toBeTypeOf("function"));

    // The rows on screen are the previous filter's: their cursor is not this list's.
    expect(screen.queryByRole("button", { name: "adminLogs.older" })).toBeNull();
    await act(async () => landErrors({ items: [row(1)], accounts: {}, next_cursor: null }));
  });

  it("copies every loaded line, oldest first", async () => {
    logsMock.mockImplementation(async (_q, before) =>
      before === null
        ? { items: [row(3), row(2)], accounts: {}, next_cursor: "c1" }
        : { items: [row(1)], accounts: {}, next_cursor: null },
    );
    renderConsole();
    await waitFor(() => expect(lines()).toHaveLength(2));
    fireEvent.click(screen.getByRole("button", { name: "adminLogs.older" }));
    await waitFor(() => expect(lines()).toHaveLength(3));

    await act(async () => {
      fireEvent.click(screen.getByRole("button", { name: "adminLogs.copy" }));
    });

    const ids = copied[copied.length - 1]!.split("\n").map((l) => JSON.parse(l).id);
    expect(ids).toEqual([1, 2, 3]);
  });

  it("the keyboard can walk the lines and open one (NavGrid items)", async () => {
    logsMock.mockResolvedValue({ items: [row(2), row(1)], accounts: {}, next_cursor: null });
    renderConsole();
    await waitFor(() => expect(lines()).toHaveLength(2));

    const items = lines().map((b) => b.parentElement!);
    expect(items.map((el) => el.getAttribute("data-nav-index"))).toEqual(["0", "1"]);
    expect(lines().every((b) => b.hasAttribute("data-nav-open"))).toBe(true);
    expect(screen.getByTestId("admin-logs-lines").querySelector("[data-nav-list]")).toBeTruthy();
  });

  it("a failed read is an error with a retry, not an empty log", async () => {
    logsMock.mockRejectedValue(new Error("502"));
    renderConsole();

    expect(await screen.findByRole("alert")).toBeTruthy();
    expect(screen.queryByText("adminLogs.empty")).toBeNull();
  });
});