/**
 * Slide-animation style registry — the single source of truth.
 *
 * The named styles drive the Veo F2V *motion prompt* used to animate each slide
 * (subtle ambient motion: luminance drift, halftone shimmer, neon glow, etc.).
 * This TS module and the Python generator
 * (`skills/video-replicator/scripts/bunty_animate_slides.py`) BOTH read the same
 * `animation-styles.json`, so adding a style is a one-file change.
 *
 * NOTE on architecture: the actual F2V motion is generated by the Python
 * `bunty_animate_slides.py` (Veo F2V loop per slide). The TS assemble pipeline's
 * `animate-slides.ts` is the FFmpeg *encoder* for a slide segment; it does not
 * generate AI motion. This module gives the CLI/validation/gate a TS-canonical
 * view of the available styles.
 */
import registry from './animation-styles.json' with { type: 'json' };

export interface AnimationStyle {
  /** Stable kebab-case id used by `--style` / `--animation-style`. */
  id: string;
  /** Human-friendly display name. */
  label: string;
  /** One-line summary (shown in the interactive gate + `animation-styles` list). */
  description: string;
  /** The full Veo F2V motion prompt fed to the generator. Motion-only, filter-safe. */
  motionPrompt: string;
}

interface AnimationStyleRegistry {
  schemaVersion: number;
  defaultStyle: string;
  styles: AnimationStyle[];
}

const REGISTRY = registry as AnimationStyleRegistry;

/** All animation styles, in registry order. */
export const ANIMATION_STYLES: readonly AnimationStyle[] = REGISTRY.styles;

/** All valid style ids, in registry order. */
export const ANIMATION_STYLE_IDS: readonly string[] = REGISTRY.styles.map((s) => s.id);

/** The default style id (used when the caller doesn't pick one). */
export const DEFAULT_ANIMATION_STYLE: string = REGISTRY.defaultStyle;

/** Look up a style by id; returns undefined for an unknown id. */
export function getAnimationStyle(id: string): AnimationStyle | undefined {
  return REGISTRY.styles.find((s) => s.id === id);
}

/** Type-guard: is `id` a registered animation style? */
export function isAnimationStyle(id: string): boolean {
  return REGISTRY.styles.some((s) => s.id === id);
}