// ─── Computed Getters ──────────────────────────────────────────────────────

import type { GameState } from '../types';
import { ENCHANTMENT_EFFECTS } from '../data/enchantment-effects';

export function getEquipmentSpells(get: () => GameState): string[] {
  const state = get();
  const spells: string[] = [];

  for (const instanceId of Object.values(state.equippedInstances || {})) {
    if (!instanceId) continue;
    const instance = state.equipmentInstances[instanceId];
    if (!instance) continue;

    for (const ench of instance.enchantments) {
      const effectDef = ENCHANTMENT_EFFECTS[ench.effectId];
      if (effectDef?.effect.type === 'spell' && effectDef.effect.spellId) {
        spells.push(effectDef.effect.spellId);
      }
    }
  }

  return [...new Set(spells)];
}

export function getEquipmentEffects(get: () => GameState): Record<string, number> {
  const state = get();
  const effects: Record<string, number> = {};

  for (const instanceId of Object.values(state.equippedInstances || {})) {
    if (!instanceId) continue;
    const instance = state.equipmentInstances[instanceId];
    if (!instance) continue;

    for (const ench of instance.enchantments) {
      const effectDef = ENCHANTMENT_EFFECTS[ench.effectId];
      if (!effectDef) continue;

      if (effectDef.effect.type === 'bonus' && effectDef.effect.stat && effectDef.effect.value) {
        effects[effectDef.effect.stat] = (effects[effectDef.effect.stat] || 0) + effectDef.effect.value * ench.stacks;
      }
    }
  }

  return effects;
}

export function getAvailableCapacity(
  instanceId: string,
  get: () => GameState
): number {
  const state = get();
  const instance = state.equipmentInstances[instanceId];
  if (!instance) return 0;
  return instance.totalCapacity - instance.usedCapacity;
}