/** Per-group colors and identity, and the feature toggles that have gone back and
 * forth while this design was under review - flip one here rather than hunting
 * through the components that read it. Most toggles are about the browse screen's
 * shelf/row look, but some (`SHOW_GLASS_BLUR`, `SHOW_AMBIENCE`,
 * `SHOW_DECORATIVE_ANIMATIONS`) reach further: the play view, the player bar, the
 * room page and `App.tsx` all read this module too, wherever they share the same
 * "cut this on weak hardware" knob.
 *
 * `SHOW_ROW_TITLES` and `SHOW_ROW_ICONS` both `true` reproduces the original shelf
 * header - an icon badge plus label button above each row's tiles. */

import type { CSSProperties } from "react";

import type { Group } from "./search";
import type { UiState } from "./keyboard";

// ---------------------------------------------------------------- toggles --

/** Tint each shelf panel and its rows with the group's hue below. */
export const SHOW_ROW_TINT = false;

/** Show each shelf's title text ("Musik", "Hörbücher", "Podcasts") above its tiles. */
export const SHOW_ROW_TITLES = true;

/** Show the small icon badge (🎵/📖/🎙️) beside the title. Stands alone fine with
 * `SHOW_ROW_TITLES` off (an icon-only header), but the original look needs both. */
export const SHOW_ROW_ICONS = true;

/** Vertical gap between shelves on the root browse screen, in px. */
export const ROW_SPACING = 25;

/** Fade the album/category grid in (with a slight upward slide) when a group or
 * category is entered, and the album modal in when it opens. One animation per
 * container, not per card, so cost stays flat regardless of grid size. */
export const ANIMATE_VIEW_TRANSITIONS = true;

/** Frost the glass panels/cards/rows with a real backdrop blur. `backdrop-filter` is
 * one of the most GPU-expensive CSS effects in the app - a live backdrop copy+blur
 * per element, repeated for every album card in the unvirtualized grid - so turn
 * this off on weak hardware (e.g. an old Raspberry Pi) to fall back to a plain
 * translucent background with no blur. */
export const SHOW_GLASS_BLUR = true;

/** Render the play view's animated canvas background (gradient + bubbles, both
 * redrawn every frame at 60fps). Off falls back to `.stage`'s own static CSS
 * gradient, which is still underneath the canvas either way. */
export const SHOW_AMBIENCE = true;

/** Run the purely decorative CSS animation loops: the room page's bubble field and
 * the dolphin mascot's bob/swim. Individually cheap (opacity/transform only) but
 * free to cut on weak hardware. */
export const SHOW_DECORATIVE_ANIMATIONS = true;

// ------------------------------------------------------------------ colors --

/** Per-group hue (oklch degrees). The play view's ambient water uses the same
 * family (`ambienceBaseFor` in `lib/ambience.ts`), so a tinted shelf already hints
 * at the mood its albums play into - and so does the book/music card tint in
 * `lib/covers.ts`, which reads `GROUP_HUE.audiobooks`/`GROUP_HUE.music` too. */
export const GROUP_HUE: Record<Group, number> = {
  music: 210, // today's sea - Dolphin Beats' baseline hue
  audiobooks: 55, // warm amber - richer than the old shared hue (80)'s dull brown
  podcasts: 300, // the one otherwise-unused family
};

export const GROUP_ICON: Record<Group, string> = {
  music: "🎵",
  audiobooks: "📖",
  podcasts: "🎙️",
};

export const GROUP_LABEL: Record<Group, string> = {
  music: "Musik",
  audiobooks: "Hörbücher",
  podcasts: "Podcasts",
};

/** How much horizontal space the tab rail's own glass bar claims on the right edge
 * (its `right` inset plus its rendered width) - scrollable content reserves this much
 * padding on that side so a full row/grid never renders underneath it. Keep in sync
 * with the geometry in `TabRail.tsx`. */
export const TAB_RAIL_CLEARANCE = 88;

/** Icon/label for the vertical tab rail - one entry per `UiState["page"]`. The
 * smarthome tab only renders when Home Assistant is configured (see `App.tsx`); the
 * other two always show. */
export const PAGE_ICON: Record<UiState["page"], string> = {
  music: "🎵",
  room: "💡",
  typing: "⌨️",
};

export const PAGE_LABEL: Record<UiState["page"], string> = {
  music: "Musik",
  room: "Mein Zimmer",
  typing: "Tippen",
};

/** A shelf/row's frosted background and border, tinted with its group's hue - or,
 * with `SHOW_ROW_TINT` off, `{}` so `.glass-panel`'s own neutral CSS shows through. */
export function glassTint(hue: number): CSSProperties {
  if (!SHOW_ROW_TINT) return {};
  return {
    background: `linear-gradient(160deg, oklch(55% 0.1 ${hue} / .32), oklch(30% 0.06 ${hue} / .14))`,
    borderColor: `oklch(75% 0.09 ${hue} / .4)`,
  };
}

/** One list row's background, tinted with its group's hue and brighter/more opaque
 * while it's the currently-playing row - or, with `SHOW_ROW_TINT` off, the same
 * neutral highlight the row used before tinting existed. */
export function rowTint(hue: number, highlighted: boolean): CSSProperties {
  if (!SHOW_ROW_TINT) {
    return { background: `oklch(97% 0.01 210 / ${highlighted ? ".22" : ".10"})` };
  }
  return {
    background: `oklch(${highlighted ? "62% 0.12" : "42% 0.08"} ${hue} / ${highlighted ? ".34" : ".2"})`,
    borderColor: `oklch(78% 0.09 ${hue} / ${highlighted ? ".5" : ".28"})`,
  };
}