import { render, screen, waitFor } from "@testing-library/react";
import userEvent from "@testing-library/user-event";
import { afterEach, expect, it, vi } from "vitest";

import { ANALYTICS_GROUPS, EMPTY_PANELS, TIMES } from "../test/analytics-fixtures.ts";
import { serve } from "../test/http.ts";
import { EMPTY_ROUTES, ROUTES } from "./analytics-routes.ts";

const [ONLY_GROUP] = ANALYTICS_GROUPS.groups;
import { Analytics } from "./analytics.tsx";

// The states that are not "a populated page": nothing recorded, exactly one
// of something, and a history long enough to have a direction. Split out of
// analytics.test.tsx so both stay under the 250-line cap.

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

it("renders every panel against a bot that has never run", async () => {
  // The state a fresh install is in. Every panel has to say so rather than
  // draw an axis over nothing.
  serve(EMPTY_ROUTES);
  render(<Analytics />);
  await waitFor(() => {
    expect(screen.getByTestId("chart-commands-empty")).toBeInTheDocument();
  });
  expect(screen.getByTestId("no-upstream")).toBeInTheDocument();
  expect(screen.getByTestId("no-demand")).toBeInTheDocument();
  expect(screen.getByTestId("no-pools")).toBeInTheDocument();
  expect(screen.getByTestId("chart-calendar-empty")).toBeInTheDocument();
  expect(screen.getByTestId("tiles")).toHaveTextContent("—");
});

it("asks the server for one group when one is picked", async () => {
  // A group id is 44 characters of base64, so it is picked and never typed.
  const fetcher = serve(ROUTES);
  render(<Analytics />);
  await waitFor(() => {
    expect(screen.getByTestId("group-picker")).toBeInTheDocument();
  });
  await userEvent.selectOptions(screen.getByTestId("group-picker"), ONLY_GROUP?.id ?? "");
  await waitFor(() => {
    const asked = fetcher.mock.calls.map((call) => String(call[0]));
    expect(asked.some((url) => url.includes("group="))).toBe(true);
  });
});

it("agrees with itself about one of anything", async () => {
  // Singular. The footnote reads as prose and "1 uses over 1 days" is the
  // sort of thing that gets noticed every single time.
  const one = {
    days: 1,
    enough_for_a_trend: false,
    events: 1,
    first_day: "2026-08-29",
    last_day: "2026-08-29",
    sources: { daily_uses: 0, journald: 0, live: 1 },
  };
  serve({
    ...EMPTY_ROUTES,
    "/api/analytics/demand": {
      body: {
        ...EMPTY_PANELS.demand,
        near_misses: [{ hits: 1, target: "!kot", variants: 1 }],
        window: one,
      },
    },
    "/api/analytics/overview": { body: { ...EMPTY_PANELS.overview, window: one } },
  });
  render(<Analytics />);
  await waitFor(() => {
    expect(screen.getByTestId("sources")).toHaveTextContent("1 recorded use over 1 day");
  });
  expect(screen.getByTestId("demand")).toHaveTextContent("1 near miss");
  expect(screen.getByTestId("demand")).toHaveTextContent("1 spelling");
});

it("states a direction once there are enough days to have one", async () => {
  const long = {
    days: 40,
    enough_for_a_trend: true,
    events: 900,
    first_day: "2026-07-01",
    last_day: "2026-08-31",
    sources: { daily_uses: 0, journald: 0, live: 900 },
  };
  serve({
    ...EMPTY_ROUTES,
    "/api/analytics/overview": { body: { ...EMPTY_PANELS.overview, window: long } },
  });
  render(<Analytics />);
  await waitFor(() => {
    expect(screen.getByTestId("sources")).toHaveTextContent("900 recorded uses over 40 days");
  });
  expect(screen.getByTestId("sources")).not.toHaveTextContent("Too few days");
});

it("says nothing about dates before there are any", async () => {
  serve(EMPTY_ROUTES);
  render(<Analytics />);
  await waitFor(() => {
    expect(screen.getByTestId("sources")).toBeInTheDocument();
  });
  // No parenthesised range at all rather than an empty one.
  expect(screen.getByTestId("sources")).not.toHaveTextContent("()");
});

it("lists an upstream host and a pool when there is one of each", async () => {
  serve(ROUTES);
  render(<Analytics />);
  await waitFor(() => {
    expect(screen.getByTestId("upstream")).toHaveTextContent("commons.example.test");
  });
  expect(screen.getByTestId("sessions")).toHaveTextContent("10 sittings");
});

it("goes back to every group when the picker is cleared", async () => {
  const fetcher = serve(ROUTES);
  render(<Analytics />);
  await waitFor(() => {
    expect(screen.getByTestId("group-picker")).toBeInTheDocument();
  });
  const picker = screen.getByTestId("group-picker");
  await userEvent.selectOptions(picker, ONLY_GROUP?.id ?? "");
  await waitFor(() => {
    expect(fetcher.mock.calls.some((call) => String(call[0]).includes("group="))).toBe(true);
  });

  fetcher.mockClear();
  await userEvent.selectOptions(picker, "");
  await waitFor(() => {
    expect(fetcher.mock.calls.length).toBeGreaterThan(0);
  });
  // The roll-up asks for no group at all rather than for an empty one.
  expect(fetcher.mock.calls.every((call) => !String(call[0]).includes("group="))).toBe(true);
});

it("labels a weekday grid that is longer than a week", async () => {
  // The server sends exactly seven rows. If it ever sent more, they get a
  // number rather than an undefined label -- which is what the index
  // fallback is for, and the only way to reach it.
  serve({
    ...ROUTES,
    "/api/analytics/time": {
      body: {
        ...TIMES,
        weekday_hours: [...TIMES.weekday_hours, Array.from({ length: 24 }, () => 2)],
      },
    },
  });
  render(<Analytics />);
  await waitFor(() => {
    expect(screen.getByTestId("chart-weekday-hours")).toBeInTheDocument();
  });
  expect(screen.getByText("7")).toBeInTheDocument();
});