/**
 * The preset scenes the Play layer offers — each one an ordinary SceneSpec,
 * nothing a user could not build by hand in the Build tab. A preset is a
 * starting point, not a mode: picking one loads its spec into the builder,
 * and everything stays editable from there.
 */
import type { SceneSpec } from './types.ts';

export interface Preset {
  key: string;
  label: string;
  blurb: string;
  /** What the excite button says for this scene. */
  verb: string;
  spec: SceneSpec;
  /** Where the microphone starts, metres. */
  mic: { x: number; y: number; z: number };
}

export const PRESETS: Preset[] = [
  {
    key: 'dulcimer',
    label: 'Dulcimer',
    blurb: 'One plucked string over a rigid box with a sound hole — the scene the dulcimer project hardcodes, here just a preset.',
    verb: 'Pluck',
    spec: {
      objects: [
        {
          id: 's1', type: 'string', size: { L1: 0.6 },
          params: {}, place: {},
        },
      ],
      body: { type: 'box', params: {} },
    },
    mic: { x: 0.12, y: 0.08, z: 0.1 },
  },
  {
    key: 'drum',
    label: 'Drum',
    blurb: 'A struck membrane over a cylindrical shell. The head’s inharmonic modes plus the cavity under it are what make it a drum.',
    verb: 'Strike',
    spec: {
      objects: [
        {
          id: 'm1', type: 'membrane', size: { L1: 0.32, L2: 0.32 },
          params: {}, place: {},
        },
      ],
      body: { type: 'shell', params: {} },
    },
    mic: { x: 0.15, y: 0.1, z: 0.12 },
  },
  {
    key: 'chime',
    label: 'Chime',
    blurb: 'A stiff bar in open air, struck. No tension, so the stiffness sets the partials — at n²·f1, which is the bell-like sound.',
    verb: 'Strike',
    spec: {
      objects: [
        {
          id: 'b1', type: 'bar', size: { L1: 0.3 },
          params: {}, place: { oz: 0.05 },
        },
      ],
      body: { type: 'none', params: {} },
    },
    mic: { x: 0.12, y: 0.08, z: 0.1 },
  },
  {
    key: 'bare',
    label: 'Bare string',
    blurb: 'The control experiment: the same plucked string with no body at all. Compare it to the dulcimer to hear what the box adds.',
    verb: 'Pluck',
    spec: {
      objects: [
        {
          id: 's1', type: 'string', size: { L1: 0.6 },
          params: { gair: 1, gbridge: 0 }, place: {},
        },
      ],
      body: { type: 'none', params: {} },
    },
    mic: { x: 0.12, y: 0.08, z: 0.1 },
  },
  {
    key: 'duet',
    label: 'Duet',
    blurb: 'Two strings a fifth apart over one box, plucked together — the smallest ensemble, and the point of composing scenes.',
    verb: 'Pluck',
    spec: {
      objects: [
        {
          id: 's1', type: 'string', size: { L1: 0.6 },
          params: { f0: 294 }, place: { oy: -0.03 },
        },
        {
          id: 's2', type: 'string', size: { L1: 0.6 },
          params: { f0: 441, pluckpos: 0.3 }, place: { oy: 0.03 },
        },
      ],
      body: { type: 'box', params: { boxw: 0.22 } },
    },
    mic: { x: 0.12, y: 0.08, z: 0.1 },
  },
  {
    key: 'kit',
    label: 'Drum and chime',
    blurb: 'A membrane over its shell and a bar beside it, struck together — two kinds of physics in one air.',
    verb: 'Strike',
    spec: {
      objects: [
        {
          id: 'm1', type: 'membrane', size: { L1: 0.3, L2: 0.3 },
          params: { f0: 100 }, place: {},
        },
        {
          id: 'b1', type: 'bar', size: { L1: 0.25 },
          params: { f1: 880 }, place: { oy: -0.12, oz: 0.06 },
        },
      ],
      body: { type: 'shell', params: { shellr: 0.16 } },
    },
    mic: { x: 0.18, y: 0.1, z: 0.12 },
  },
];

export const presetByKey = (key: string): Preset | undefined =>
  PRESETS.find((p) => p.key === key);

/** Deep-copy a preset's spec so edits do not bleed back into the preset. */
export const cloneSpec = (spec: SceneSpec): SceneSpec =>
  JSON.parse(JSON.stringify(spec)) as SceneSpec;