// @vitest-environment jsdom
//
// A closed-set config key is picked, not typed: a short list renders as a segmented bar, a long one as
// a dropdown, and the pick is what Save sends. A cleared draft (reset to the default) shows the default
// as the active option rather than no option at all.
//
// i18n is a key-passthrough, except for an option's label: a full key would distort the
// bar-or-dropdown choice, which weighs the real label length, so a choice id resolves to its value
// under a one-character marker. The marker is what makes a lost lookup visible — rendering the bare
// value instead of the id would be indistinguishable from `label: c`. The admin config API is stubbed.
import { afterEach, describe, expect, it, vi } from "vitest";
import { cleanup, fireEvent, render, screen, waitFor } from "@testing-library/react";
import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
import type { ConfigItem } from "../lib/api";

vi.mock("react-i18next", async (importOriginal) => {
  const actual = await importOriginal<typeof import("react-i18next")>();
  return {
    ...actual,
    useTranslation: () => ({
      // Only an id the fixture really defines resolves: a dropped lookup renders the bare value and
      // a malformed id renders the key (long enough to turn every bar into a dropdown), so the
      // assertions below see both.
      t: (key: string) => CHOICE_LABELS[key] ?? key,
      i18n: { language: "en" },
    }),
  };
});

const choice = (key: string, choices: string[], value: string, is_set = false): ConfigItem => ({
  key,
  type: "choice",
  group: "g",
  secret: false,
  min: null,
  max: null,
  is_set,
  allow_empty: false,
  choices,
  value,
  default: choices[0],
});

const PRESETS = ["ultrafast", "superfast", "veryfast", "faster", "fast", "medium", "slow"];
const LEVELS = ["TRACE", "DEBUG", "INFO", "WARNING", "ERROR"];
const CHOICE_LABELS: Record<string, string> = Object.fromEntries(
  (
    [
      ["plex_transcode_hw", ["auto", "on", "off"]],
      ["plex_transcode_preset", PRESETS],
      ["log_level", LEVELS],
    ] as const
  ).flatMap(([key, choices]) =>
    choices.map((c) => [`config.choices.${key}.${c}`, `~${c}`] as const),
  ),
);
const setConfig = vi.fn((_key: string, _value: unknown) => Promise.resolve({}));
const resetConfig = vi.fn((_key: string) => Promise.resolve({}));

vi.mock("../lib/api", async (importOriginal) => {
  const actual = await importOriginal<typeof import("../lib/api")>();
  return {
    ...actual,
    api: {
      ...actual.api,
      adminConfig: () =>
        Promise.resolve({
          groups: {
            g: [
              choice("plex_transcode_hw", ["auto", "on", "off"], "on", true),
              choice("plex_transcode_preset", PRESETS, "veryfast"),
              choice("log_level", LEVELS, "INFO"),
            ],
          },
          secrets_manageable: true,
        }),
      setConfig: (key: string, value: unknown) => setConfig(key, value),
      resetConfig: (key: string) => resetConfig(key),
    },
  };
});
vi.mock("../lib/useMe", () => ({ useMe: () => ({ email_configured: true }) }));

import ConfigPanel from "./ConfigPanel";

afterEach(() => {
  cleanup();
  vi.clearAllMocks();
});

const mount = () =>
  render(
    <QueryClientProvider client={new QueryClient()}>
      <ConfigPanel />
    </QueryClientProvider>,
  );

describe("ConfigPanel choice keys", () => {
  it("renders a short list as a segmented bar and saves the pick", async () => {
    mount();
    const bar = await screen.findByRole("group", { name: "config.fields.plex_transcode_hw.label" });
    const pressed = () =>
      [...bar.querySelectorAll('[aria-pressed="true"]')].map((b) => b.textContent);
    expect(pressed()).toEqual(["~on"]);
    expect(screen.queryByRole("textbox")).toBeNull(); // no free-text field for a choice key

    fireEvent.click(screen.getByRole("button", { name: "~off" }));
    fireEvent.click(await screen.findByRole("button", { name: "config.save" }));
    await waitFor(() => expect(setConfig).toHaveBeenCalledWith("plex_transcode_hw", "off"));
  });

  it("shows the default as active once the override is reset, and Save resets it", async () => {
    mount();
    await screen.findByRole("group", { name: "config.fields.plex_transcode_hw.label" });
    fireEvent.click(screen.getByRole("button", { name: /config\.reset$/ }));
    expect(screen.getByRole("button", { name: "~auto" }).getAttribute("aria-pressed")).toBe("true");
    fireEvent.click(await screen.findByRole("button", { name: "config.save" }));
    await waitFor(() => expect(resetConfig).toHaveBeenCalledWith("plex_transcode_hw"));
  });

  it("renders a long list as a dropdown showing only the value", async () => {
    mount();
    const trigger = await screen.findByRole("button", {
      name: "config.fields.plex_transcode_preset.label: ~veryfast",
    });
    expect(trigger.textContent).toBe("~veryfast");
    fireEvent.click(trigger);
    // The popover rows are queried as FilterSelect.dom.test does (`hidden: true`, picked by text).
    const rows = screen.getAllByRole("menuitemradio", { hidden: true });
    fireEvent.click(rows.find((r) => r.textContent === "~slow")!);
    fireEvent.click(await screen.findByRole("button", { name: "config.save" }));
    await waitFor(() => expect(setConfig).toHaveBeenCalledWith("plex_transcode_preset", "slow"));
  });

  it("a few options with long labels are a dropdown too: a bar that wide does not fit a phone", async () => {
    mount();
    await screen.findByRole("button", { name: "config.fields.log_level.label: ~INFO" });
    expect(screen.queryByRole("group", { name: "config.fields.log_level.label" })).toBeNull();
  });
});