// cosmetics.ts — Système cosmétique (récompenses achievements + prestige)

import type { GameState } from "./economy";
import { ACHIEVEMENTS } from "../data/achievements";

export type CosmeticSlot = "hat" | "eyes" | "body" | "tail" | "accessory";

export interface Cosmetic {
  id: string;
  name: string;
  slot: CosmeticSlot;
  svg: string;            // chemin vers le SVG overlay (/svg/cosmetics/...)
  source: "achievement" | "prestige";
  sourceId: string;       // achievement id ou "prestige_N"
  description: string;
}

export interface CosmeticState {
  inventory: string[];                          // ids des cosmétiques débloqués
  equipped: Partial<Record<CosmeticSlot, string>>;  // slot → cosmetic id
}

export const DEFAULT_COSMETIC_STATE: CosmeticState = {
  inventory: [],
  equipped: {},
};

// --- Catalogue des cosmétiques ---

export const COSMETICS: Cosmetic[] = [
  // Hat
  { id: "crown",           name: "Couronne Ancestrale",  slot: "hat",       svg: "/svg/cosmetics/crown.svg",           source: "prestige",    sourceId: "prestige_10",   description: "10 prestiges — la royauté du marais" },
  { id: "cap_swamp",       name: "Casquette du Marais",  slot: "hat",       svg: "/svg/cosmetics/cap-swamp.svg",       source: "achievement", sourceId: "industriel",     description: "10 générateurs au total" },

  // Eyes
  { id: "glasses_savant",  name: "Lunettes du Savant",   slot: "eyes",      svg: "/svg/cosmetics/glasses-savant.svg",  source: "prestige",    sourceId: "prestige_5",    description: "5 prestiges — la sagesse" },
  { id: "mask_frog",       name: "Masque Grenouille",    slot: "eyes",      svg: "/svg/cosmetics/mask-frog.svg",       source: "achievement", sourceId: "empire",        description: "1M têtards — le regard de l'empire" },

  // Body
  { id: "cape_algae",      name: "Cape d'Algues",        slot: "body",      svg: "/svg/cosmetics/cape-algae.svg",      source: "prestige",    sourceId: "prestige_25",   description: "25 prestiges — tissée par le marais" },
  { id: "armor_scales",    name: "Armure d'Écailles",    slot: "body",      svg: "/svg/cosmetics/armor-scales.svg",    source: "achievement", sourceId: "tycoon",        description: "100 générateurs — blindage total" },

  // Tail
  { id: "flame_tail",      name: "Queue Enflammée",      slot: "tail",      svg: "/svg/cosmetics/flame-tail.svg",      source: "prestige",    sourceId: "prestige_50",   description: "50 prestiges — la traîne de feu" },
  { id: "ribbon",          name: "Ruban du Nouveau-Né",  slot: "tail",      svg: "/svg/cosmetics/ribbon.svg",          source: "achievement", sourceId: "first_prestige", description: "Premier prestige — le début de tout" },

  // Accessory
  { id: "aura_swamp",      name: "Aura du Marais",       slot: "accessory", svg: "/svg/aura-swamp.svg",                source: "achievement", sourceId: "veteran",       description: "5 prestiges — l'aura des anciens" },
  { id: "particles_gold",  name: "Particules Dorées",    slot: "accessory", svg: "/svg/cosmetics/particles-gold.svg",  source: "prestige",    sourceId: "prestige_3",    description: "3 prestiges — poussière d'étoiles" },
];

// --- Fonctions cosmétiques ---

// Vérifie si un cosmétique devrait être débloqué
export function shouldUnlockCosmetic(cosmetic: Cosmetic, state: GameState): boolean {
  if (cosmetic.source === "prestige") {
    const tier = parseInt(cosmetic.sourceId.replace("prestige_", ""), 10);
    return state.prestigeCount >= tier;
  }
  if (cosmetic.source === "achievement") {
    const achievement = ACHIEVEMENTS.find((a) => a.id === cosmetic.sourceId);
    return achievement ? achievement.check(state) : false;
  }
  return false;
}

// Calcule les cosmétiques nouvellement débloqués (pas encore dans l'inventaire)
export function computeNewUnlocks(state: GameState, cosmeticState: CosmeticState): string[] {
  return COSMETICS
    .filter((c) => !cosmeticState.inventory.includes(c.id) && shouldUnlockCosmetic(c, state))
    .map((c) => c.id);
}

// Équiper un cosmétique (retourne le nouvel état)
export function equipCosmetic(cosmeticState: CosmeticState, cosmeticId: string): CosmeticState {
  const cosmetic = COSMETICS.find((c) => c.id === cosmeticId);
  if (!cosmetic) return cosmeticState;
  if (!cosmeticState.inventory.includes(cosmeticId)) return cosmeticState;

  return {
    ...cosmeticState,
    equipped: { ...cosmeticState.equipped, [cosmetic.slot]: cosmeticId },
  };
}

// Déséquiper un slot
export function unequipSlot(cosmeticState: CosmeticState, slot: CosmeticSlot): CosmeticState {
  const { [slot]: _, ...rest } = cosmeticState.equipped;
  return { ...cosmeticState, equipped: rest };
}

// Ajouter des cosmétiques à l'inventaire
export function addToInventory(cosmeticState: CosmeticState, ids: string[]): CosmeticState {
  const newIds = ids.filter((id) => !cosmeticState.inventory.includes(id));
  if (newIds.length === 0) return cosmeticState;
  return { ...cosmeticState, inventory: [...cosmeticState.inventory, ...newIds] };
}