import { INGREDIENTS, type IngredientId } from './ingredients';

/**
 * The temperature clock, generalized from butter softness (M2) to any perishable
 * that drifts on the bench.
 *
 * Butter softness was always a static dial the order handed you. This is that
 * dial made real: a cheese sat in the fridge is cold and firm; left on the bench
 * it warms toward soft in real time, on its own `softensInSec`. Two perishables,
 * two opposite needs, and that is the whole planning game of the bruschetta:
 *
 *   brie      needsSoft — spreadable by assembly time. Get it OUT early or it
 *             places like a stone.
 *   parmesan  needsCold — shaves clean only cold (the M13 grater rule: warm
 *             cheese smears). Leave it IN until you need it.
 *
 * You set each state at order start and can revisit it — for a price in service
 * time, because opening the fridge again mid-service costs you (the game charges
 * the seconds; this sim just flips the state). The pressure is felt through the
 * ticket hint and the clock, never a tutorial: by the time you assemble, the
 * cheese is however warm your planning left it, and the judge tastes it.
 *
 * Pure and time-stepped — no three.js — so the harness can warm a cheese headless
 * and read exactly how ready it is.
 */

export type TempState = 'fridge' | 'bench';

export interface Perishable {
  id: IngredientId;
  name: string;
  state: TempState;
  /** 0 = fridge-cold and firm, 1 = out-all-morning warm and soft. */
  temp: number;
  /** Wants to be warm/soft by assembly (brie). */
  needsSoft: boolean;
  /** Wants to be cold/firm at assembly (parmesan). */
  needsCold: boolean;
  /** Seconds on the bench to drift a full 0→1. Fridge cools at the same rate. */
  softensInSec: number;
}

export interface TempReadiness {
  /** The perishable's current 0..1 warmth. */
  temp: number;
  /** 0..1 — how well it meets its need right now. */
  score: number;
  /** The readout word, in the judge's own thresholds. */
  word: string;
}

/** A perishable starts cold in the fridge — you decide what comes out. */
function makePerishable(id: IngredientId): Perishable {
  const ing = INGREDIENTS[id];
  return {
    id,
    name: ing.name,
    state: 'fridge',
    temp: 0,
    needsSoft: !!ing.temp?.needsSoft,
    needsCold: !!ing.temp?.needsCold,
    softensInSec: ing.temp?.softensInSec ?? 90,
  };
}

export class TempClock {
  readonly items: Perishable[];

  constructor(ids: IngredientId[]) {
    this.items = ids.map(makePerishable);
  }

  get(id: IngredientId): Perishable | undefined {
    return this.items.find((p) => p.id === id);
  }

  /** Flip fridge↔bench. The game charges the service-time cost; this just flips. */
  toggle(id: IngredientId): void {
    const p = this.get(id);
    if (p) p.state = p.state === 'fridge' ? 'bench' : 'fridge';
  }

  setState(id: IngredientId, state: TempState): void {
    const p = this.get(id);
    if (p) p.state = state;
  }

  /** Drift every perishable one tick toward its state's target temperature. */
  step(dt: number): void {
    if (dt <= 0) return;
    for (const p of this.items) {
      const target = p.state === 'bench' ? 1 : 0;
      const rate = dt / p.softensInSec;
      if (p.temp < target) p.temp = Math.min(target, p.temp + rate);
      else if (p.temp > target) p.temp = Math.max(target, p.temp - rate);
    }
  }

  /** How ready one perishable is for assembly, scored against its need. */
  readiness(id: IngredientId): TempReadiness {
    const p = this.get(id);
    if (!p) return { temp: 0, score: 1, word: 'n/a' };
    return readinessOf(p);
  }

  /**
   * The one number The Bench temperature row reads: the whole plan's readiness,
   * dragged down to its worst perishable — one cold-hard brie or one sweaty
   * parmesan is enough to hear about it.
   */
  overall(): { score: number; worst: Perishable; word: string } {
    let worst = this.items[0];
    let worstScore = 1;
    for (const p of this.items) {
      const s = readinessOf(p).score;
      if (s < worstScore) {
        worstScore = s;
        worst = p;
      }
    }
    return { score: worstScore, worst, word: readinessOf(worst).word };
  }
}

const clamp01 = (v: number) => (v < 0 ? 0 : v > 1 ? 1 : v);

function readinessOf(p: Perishable): TempReadiness {
  if (p.needsSoft) {
    // Soft is the whole point: cold-hard scores nothing, spreadable scores full.
    const score = clamp01((p.temp - 0.12) / 0.45);
    const word = p.temp < 0.2 ? 'fridge-hard' : p.temp < 0.5 ? 'softening' : 'spreadable';
    return { temp: p.temp, score, word };
  }
  if (p.needsCold) {
    // Cold shaves clean; warm smears (the grater's lesson, one clock over).
    const score = clamp01(1 - (p.temp - 0.2) / 0.45);
    const word = p.temp < 0.25 ? 'cold' : p.temp < 0.55 ? 'sweating' : 'smearing';
    return { temp: p.temp, score, word };
  }
  return { temp: p.temp, score: 1, word: 'fine' };
}