import { describe, expect, it } from "vitest";
import { readSources } from "../../lib/rawSources.testkit";

// docs/DESIGN.md "Text stays selectable": a click surface whose text is a title or a name (a card, a
// row, a person, a channel, a playlist, a log line) is `<Pressable selectable`, so its words select and
// the click that ends selecting them does nothing. A Pressable that is NOT selectable is a control whose
// text is its own label or that has no text at all (a menu row, an option, a tab, a nav item, a
// picture, a switch). Which one a new surface is cannot be read from the code, so every plain one is
// pinned here with the reason: a new Pressable, or one that lost its flag, fails this test until
// someone decides.

const files = readSources(__dirname, [
  "../**/*.tsx",
  "!../**/*.test.*",
  "!../design-lab/**",
]) as Record<string, string>;

/** file → [how many plain Pressables, why they are not titles]. */
const PLAIN: Record<string, [number, string]> = {
  "DownloadTray.tsx": [
    2,
    "the folded pill (its summary is its label); a failure's reason, which opens its details",
  ],
  "FileCard.tsx": [1, "a card's picture (named by aria-label; its title is the caption)"],
  "FilesRail.tsx": [2, "the load-error retry; the New-folder command"],
  "Home.tsx": [
    2,
    "the hero's picture and a shelf tile's picture (each named by aria-label; its title sits outside)",
  ],
  "LanguageSwitcher.tsx": [1, "an option row"],
  "NavSidebar.tsx": [4, "the account trigger and its menu rows"],
  "PaletteLauncher.tsx": [2, "launcher controls"],
  "PlaylistsRail.tsx": [1, "the load-error retry"],
  "PlexCollectionEditor.tsx": [1, "a checkbox row in a picker"],
  "PlexInfo.tsx": [1, "the rating filter (a number)"],
  "PlexPlayerSettings.tsx": [1, "the clock's date-style options"],
  "PlexPlaylistAdd.tsx": [1, "a checkbox row in a picker"],
  "PlexPlaylistView.tsx": [1, "a show's poster stack (aria-hidden)"],
  "PlexSearchBox.tsx": [1, "a listbox option"],
  "plexCards.tsx": [1, "a card's picture (named by aria-label; its title is the caption)"],
  "Scheduler.tsx": [1, "the interval editor trigger"],
  "SettingsPanel.tsx": [1, "a colour swatch"],
  "SyncStatus.tsx": [1, "the status pill trigger"],
  "TagManager.tsx": [1, "a suggestion in a picker"],
  "UploadDialog.tsx": [1, "the drop zone"],
  "VideoEditor.tsx": [2, "timeline glyphs"],
  "Welcome.tsx": [1, "a screenshot (zoom)"],
  "playlistColumns.tsx": [1, "the thumbnail"],
  "plexDetailUi.tsx": [2, "a switch row and the poster"],
  "plexViews.tsx": [1, "the rating filter (a number)"],
  "ui/ActionMenu.tsx": [1, "a menu row"],
  "ui/BackToTop.tsx": [1, "a control"],
  "ui/CommandPalette.tsx": [1, "a command row"],
  "ui/NavRail.tsx": [
    2,
    "the action rows (About, Sign out) and the group row that opens its panel; a page row is a link",
  ],
  "ui/PanelGroup.tsx": [2, "a group's collapse toggle and its label"],
  "ui/SidePanel.tsx": [2, "panel controls"],
  "ui/tableHeader.tsx": [1, "a column's sort header"],
};

function scan(): { plain: Record<string, number>; selectable: number } {
  const plain: Record<string, number> = {};
  let selectable = 0;
  for (const [path, code] of Object.entries(files)) {
    // Glob keys are relative to this folder: `./x.tsx` is ui/, `../x.tsx` is components/.
    const rel = path.startsWith("./") ? `ui/${path.slice(2)}` : path.replace(/^\.\.\//, "");
    for (const m of code.matchAll(/<Pressable\b/g)) {
      if (/\sselectable\b(?!=)/.test(openingTag(code, m.index))) selectable++;
      else plain[rel] = (plain[rel] ?? 0) + 1;
    }
  }
  return { plain, selectable };
}

/** The opening tag starting at `from`: up to its `>` outside any `{…}` expression, quoted string or
 *  line comment (an arrow's `=>` sits inside braces, a class like `[&>svg]` inside quotes). */
function openingTag(code: string, from: number): string {
  let depth = 0;
  let quote: string | null = null;
  for (let i = from + 1; i < code.length; i++) {
    const c = code[i];
    if (quote) {
      if (c === quote) quote = null;
    } else if (c === "/" && code[i + 1] === "/") {
      i = code.indexOf("\n", i); // a comment between the props: its apostrophes are not quotes
      if (i < 0) break;
    } else if (c === '"' || c === "'" || c === "`") quote = c;
    else if (c === "{") depth++;
    else if (c === "}") depth--;
    else if (c === ">" && depth === 0) return code.slice(from, i + 1);
  }
  return code.slice(from);
}

describe("every Pressable decides whether its text is a title", () => {
  it("finds the selectable ones, and no plain one outside the pinned list", () => {
    const { plain, selectable } = scan();
    // A scan that stopped matching would be green over nothing.
    expect(selectable).toBeGreaterThan(15);
    const pinned = Object.fromEntries(Object.entries(PLAIN).map(([f, [n]]) => [f, n]));
    expect(plain).toEqual(pinned);
  });
});