/** Feature toggles and the one hue this app is built on.
 *
 * Same role as ../../web/src/lib/theme.ts: flip a switch here rather than hunting
 * through components. The hue lives in styles/app.css because CSS is where it is used;
 * it is repeated here only for the canvas, which cannot read a custom property. */

/** The turquoise lagoon. Music is 210, Hörbücher 55, "Mein Zimmer" 300. */
export const HUE = 175;

/** Frost the glass panels with a real backdrop blur. Looks like the first thing to cut
 * on a weak GPU; on the Pi it measured five times worse with it off, because the blur is
 * what gives each panel its own compositing layer. Same finding as the music app's
 * matching toggle - see the table in ../lowPower.ts. */
export const SHOW_GLASS_BLUR = true;

/** The decorative rising bubbles behind everything. A dozen elements on a CSS transform
 * loop; measured as noise on the Pi, so they stay. */
export const SHOW_BUBBLES = true;

/** The earned pets swimming behind every screen. The reward that is always in view - off
 * only to rule it out when chasing a performance problem. */
export const SHOW_AQUARIUM_CREATURES = true;

/** Fade screens in on entry. */
export const ANIMATE_VIEW_TRANSITIONS = true;

/** Show the on-screen keyboard with the finger colours. "auto" fades it out key by key
 * as each one is mastered - the scaffold that removes itself, which is the whole point
 * of teaching touch typing rather than hunt-and-peck. */
export const KEYBOARD_HINT_DEFAULT: "auto" | "on" | "off" = "auto";

/** Read the target letters and words aloud. She is six and still learning to read; a
 * missing reading skill must never block the typing skill. */
export const SPEECH_DEFAULT = true;

export const SOUND_DEFAULT = true;

/** How many letters one bubbles round sends up - matched to the dive mode's length so a
 * mode swap is not also a difficulty swap. Dive-mode line length lives on the lesson
 * itself (`lengthFor` in lib/curriculum.ts). */
export function bubbleCountFor(world: number): number {
  return world === 1 ? 50 : 100;
}