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// magenta_prompts.js
// Minimal browser port of MagentaPrompts (Swift) with single-word vibes,
// descriptive instruments, and micro-genre leaning. Outputs 1–3 words.
export const MagentaPrompts = (() => {
// ---- Base pools ----
const instruments = [
"electric guitar","acoustic guitar","flamenco guitar","bass guitar",
"electric piano","grand piano","synth lead","synth arpeggio",
"violin","cello","trumpet","saxophone","clarinet",
"drums","808 drums","live drums",
"strings","brass section","hammond organ","wurlitzer","moog bass","analog synth"
];
// single-word vibes only (kept surprising like 'warmup')
const vibes = [
"warmup","afterglow","sunrise","midnight","dusk","twilight","daybreak","nocturne","aurora","ember",
"neon","chrome","velvet","glass","granite","desert","oceanic","skyline","underground","warehouse",
"dreamy","nostalgic","moody","uplifting","mysterious","energetic","chill","dark","bright","atmospheric",
"spacey","groovy","ethereal","glitchy","dusty","tape","vintage","hazy","crystalline","shimmer",
"magnetic","luminous","starlit","shadow","smolder","static","drift","bloom","horizon"
];
const genres = [
"synthwave","death metal","lofi hiphop","acid house","techno","ambient",
"jazz","blues","rock","pop","electronic","hip hop","reggae","folk",
"classical","funk","soul","disco","dubstep","drum and bass","trance","garage"
];
const microGenres = [
"breakbeat","boom bap","uk garage","two step","dub techno","deep house",
"lofi house","minimal techno","progressive house","psytrance","goa",
"liquid dnb","neurofunk","glitch hop","idm","electro","footwork",
"phonk","dark trap","hyperpop","darksynth","chillwave","vaporwave","future garage"
];
const genreQualifiers = ["deep","dub","dark","melodic","minimal","uplifting","lofi","industrial","retro","neo"];
const genericTechniques = ["arpeggio","ostinato","staccato","legato","tremolo","harmonics","plucks","pad","chops"];
const instrumentDescriptors = {
"electric guitar": ["palm-muted","tremolo","shoegaze","chorused","lead","octave"],
"acoustic guitar": ["fingerstyle","nylon","arpeggio","strummed"],
"flamenco guitar": ["rasgueado","picado"],
"bass guitar": ["slap","picked","sub","syncopated"],
"moog bass": ["sub","resonant","rubbery"],
"analog synth": ["pad","plucks","supersaw","arpeggio"],
"synth lead": ["portamento","supersaw","mono"],
"electric piano": ["rhodes","chorused","tine"],
"wurlitzer": ["dirty","tremolo"],
"grand piano": ["felt","upright","arpeggio"],
"hammond organ": ["leslie","drawbar"],
"strings": ["pizzicato","ostinato","legato"],
"violin": ["pizzicato","legato","tremolo"],
"cello": ["sul tasto","legato","pizzicato"],
"trumpet": ["muted","harmon"],
"saxophone": ["breathy","subtone"],
"clarinet": ["staccato","legato"],
"drums": ["brushed","breakbeat","rimshot"],
"808 drums": ["808","trap"],
"live drums": ["brushed","tight","roomy"],
"brass section": ["stabs","swell"]
};
// ---- cycling state ----
const categories = ["instrument","vibe","genre"];
let currentCategoryIndex = 0;
// ---- public API ----
function getNextCyclingStyle() {
const cat = categories[currentCategoryIndex];
currentCategoryIndex = (currentCategoryIndex + 1) % categories.length;
if (cat === "instrument") return getRandomInstrument();
if (cat === "vibe") return getRandomVibe();
return getRandomGenre();
}
function getRandomInstrument() {
const inst = oneOf(instruments) ?? "electric guitar";
if (chance(0.45)) {
const specific = oneOf(instrumentDescriptors[inst] || []);
const tech = specific || oneOf(genericTechniques) || "arpeggio";
return clip1to3([tech, inst]);
}
return inst;
}
function getRandomVibe() {
return oneOf(vibes) ?? "warmup"; // single word only
}
function getRandomGenre() {
if (chance(0.65)) {
return oneOf(microGenres) ?? "breakbeat";
} else {
const pool = genres.filter(g => g.toLowerCase() !== "jazz"); // avoid pure "jazz" on dice
const base = oneOf(pool) ?? "electronic";
if (chance(0.30)) {
const q = oneOf(genreQualifiers) ?? "deep";
return clip1to3([q, base]);
}
return base;
}
}
function getRandomStyle() {
const r = Math.floor(Math.random()*3);
return r===0 ? getRandomInstrument() : r===1 ? getRandomVibe() : getRandomGenre();
}
function resetCycle(){ currentCategoryIndex = 0; }
// ---- helpers ----
const chance = p => Math.random() < Math.max(0, Math.min(1, p));
const oneOf = arr => (arr && arr.length) ? arr[Math.floor(Math.random()*arr.length)] : undefined;
const clip1to3 = (words, max=3) =>
words.flatMap(w => String(w).split(" ")).slice(0, max).join(" ");
return { getNextCyclingStyle, getRandomStyle, resetCycle };
})();
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