// PROCITY shop & town name generator — seeded, deterministic, 90s-Australian flavour.
// Given a shop's stable seed, produces the same {name, sign} forever. `sign` is the short form
// that fits a signboard (the game renders it big; `name` is the full directory/label string).
//
// Pure: only imports prng (mulberry32) + wordlists. No THREE, no network, no Math.random.

import { mulberry32 } from '../core/prng.js';
import * as W from './wordlists.js';

const pick = (r, arr) => arr[(r() * arr.length) | 0];
const cap  = s => s.charAt(0).toUpperCase() + s.slice(1);
const initials = (r) => pick(r, ['A', 'B', 'C', 'D', 'E', 'G', 'J', 'K', 'M', 'P', 'R', 'S', 'T', 'V'])
                      + ' & ' + pick(r, ['A', 'B', 'C', 'D', 'E', 'G', 'J', 'K', 'M', 'P', 'R', 'S', 'T', 'V']);

// Token → wordlist resolver. Each token draws from the bank with the given stream.
function tok(r, t) {
  switch (t) {
    case 'Word':    return pick(r, W.WORDS);
    case 'Adj':     return pick(r, W.ADJ);
    case 'Noun':    return pick(r, W.NOUN);
    case 'Suburb':  return pick(r, W.SUBURB);
    case 'Family':  return pick(r, W.FAMILY);
    case 'Saint':   return pick(r, W.SAINT);
    case 'Charity': return pick(r, W.CHARITY);
    case 'First':   return pick(r, W.FIRSTNAME);
    case 'Animal':  return pick(r, W.ANIMAL);
    case 'Init':    return initials(r);
    default:        return t;
  }
}

// Fill "{Adj} {Noun}" style token patterns. Possessives are written with a literal ’s in the
// pattern itself (e.g. "{First}’s Records", "{Saint}’s Charity Barn") — one mechanism, no magic.
function fill(r, pattern) {
  return pattern.replace(/\{(\w+)\}/g, (_, t) => tok(r, t));
}

// ── name patterns per shop type (≥40 across the board) ─────────────────────────────
const PATTERNS = {
  record: [
    '{Word} Records', '{Suburb} Sound Exchange', '{Adj} Groove', '{Word} & Wax',
    'Rotation', '{First}’s Records', 'The {Animal} Sound Co.', '{Suburb} Vinyl',
  ],
  opshop: [
    'St {Saint}’s Opportunity Shop', '{Charity} Op Shop', 'The {Adj} Op Shop',
    '{Suburb} Recycled', '{Saint}’s Charity Barn', 'Second Time {Suburb}', 'The Op Shop',
  ],
  toy: [
    '{First}’s Toys', 'The {Adj} Toy Box', '{Word} Toys & Games', '{Animal} Playthings',
    '{Suburb} Toyworld-ish', 'Marbles & Kites', 'The Toy Nook',
  ],
  book: [
    'The {Adj} Book Barn', '{Suburb} Books', '{Word} & Sons Booksellers', 'The {Animal} Bookshop',
    'Dusty Pages', '{Init} Books', 'Second-Hand Reads', 'The Book Cellar',
  ],
  video: [
    '{Suburb} Video', '{Adj} Video', 'Video {Word}', '{First}’s Video',
    'The Picture Show', 'Late Nite Video', 'Video Barn',
  ],
  pawn: [
    '{Suburb} Cash Converters-ish', '{First}’s Pawn & Loan', '{Adj} Cash', 'The Cash Corner',
    '{Init} Trading Co.', 'Quick Cash Pawn', 'Second Chance Loans',
  ],
  milkbar: [
    '{Family} Milk Bar', '{Suburb} Milk Bar', 'The {Adj} Corner Store', '{First}’s Milk Bar',
    '{Family}’s Deli & Milk Bar', 'Corner Store', 'The Milk Bar',
  ],
  dept: [
    '{Suburb} Emporium', '{Family} & Co.', 'The Grand {Word}', '{Adj} Department Store',
    '{Suburb} Trading Co.', 'Palais {Word}',
  ],
  stall: [
    '{First}’s Stall', '{Word} Stall', '{Adj} Bits', 'Trash & Treasure', '{Animal} Wares',
    'Bric-a-Brac', 'Sunday Stall',
  ],
};

// ── short signboard forms (what actually fits above the door) ──────────────────────
const SIGN_PATTERNS = {
  record:  ['{Word}', 'RECORDS', 'VINYL', '{Suburb} SOUND'],
  opshop:  ['OP SHOP', 'ST {Saint}’S', '{Charity}', 'RECYCLED'],
  toy:     ['TOYS', '{Adj} TOYS', 'TOY BOX', 'GAMES'],
  book:    ['BOOKS', 'BOOK BARN', '{Suburb} BOOKS', 'READS'],
  video:   ['VIDEO', '{Suburb} VIDEO', 'MOVIES', 'RENTALS'],
  pawn:    ['CASH', 'PAWN', 'LOANS', '{Init}'],
  milkbar: ['MILK BAR', '{Family}', 'DELI', 'CORNER STORE'],
  dept:    ['{Suburb}', 'EMPORIUM', '{Family} & CO'],
  stall:   ['STALL', 'BITS', 'BRIC-A-BRAC', 'WARES'],
};

// Public: name a shop from its stable seed + type. Returns { name, sign }.
export function shopName(seed, type) {
  const r = mulberry32((seed ^ 0x9e3779b9) >>> 0); // decorrelate from other seed uses
  const pats = PATTERNS[type] || PATTERNS.stall;
  const signs = SIGN_PATTERNS[type] || SIGN_PATTERNS.stall;
  const name = fill(r, pick(r, pats)).replace(/\s+/g, ' ').trim();
  let sign = fill(r, pick(r, signs)).replace(/\s+/g, ' ').trim();
  // Signboard can't be too long — fall back to a punchy word from the full name.
  if (sign.length > 16) {
    const word = name.split(' ').sort((a, b) => b.length - a.length)[0] || sign;
    sign = word.slice(0, 16).toUpperCase();
  }
  return { name, sign };
}

// Public: name the town from the city seed.
export function townName(citySeed) {
  const r = mulberry32((citySeed ^ 0x2545f491) >>> 0);
  const root = pick(r, W.TOWN_ROOT);
  const suffix = pick(r, W.TOWN_SUFFIX);
  const usePrefix = r() < 0.35;
  const prefix = usePrefix ? pick(r, W.TOWN_PREFIX) + ' ' : '';
  return `${prefix}${cap(root)}${suffix ? ' ' + suffix : ''}`.trim();
}