// ─── Dynamic Computations ──────────────────────────────────────────────────
// Dynamic computation functions that depend on special effects

import type { ComputedEffects } from './upgrade-effects.types';

import { SPECIAL_EFFECTS, hasSpecial } from './special-effects';

// Threshold ratios for mana-dependent effects (currentMana / maxMana)
const MANA_HIGH_THRESHOLD = 0.75;
const MANA_LOW_THRESHOLD = 0.25;
const MANA_CRITICAL_THRESHOLD = 0.1;

// Regen multipliers for mana-dependent thresholds
const MANA_TORRENT_MULTIPLIER = 1.5;
const MANA_CRISIS_MULTIPLIER = 1.5;  // Desperate / Despair Wells
const PANIC_RESERVE_MULTIPLIER = 2.0;
const REGEN_BOOST_PER_100_MANA = 0.1;

/**
 * Compute regen with special effects that depend on dynamic values
 */
export function computeDynamicRegen(
  effects: ComputedEffects,
  baseRegen: number,
  maxMana: number,
  currentMana: number,
  incursionStrength: number
): number {
  let regen = baseRegen;

  // Per-100-max-mana regen bonuses
  const manaHundreds = Math.floor(maxMana / 100);
  if (hasSpecial(effects, SPECIAL_EFFECTS.MANA_CASCADE)) {
    regen += manaHundreds * REGEN_BOOST_PER_100_MANA;
  }
  if (hasSpecial(effects, SPECIAL_EFFECTS.MANA_WATERFALL)) {
    regen += manaHundreds * 0.25;
  }
  if (hasSpecial(effects, SPECIAL_EFFECTS.DEEP_RESERVE)) {
    regen += manaHundreds * 0.5;
  }

  // Fractional max-mana regen
  if (hasSpecial(effects, SPECIAL_EFFECTS.MANA_CORE)) {
    regen += maxMana * 0.005;
  }

  // Mana Tide: sinusoidal pulse
  if (hasSpecial(effects, SPECIAL_EFFECTS.MANA_TIDE)) {
    regen *= (1.0 + 0.5 * Math.sin(Date.now() / 10000));
  }

  // Mana-ratio-dependent multipliers
  const manaRatio = currentMana / maxMana;
  if (hasSpecial(effects, SPECIAL_EFFECTS.MANA_TORRENT) && manaRatio > MANA_HIGH_THRESHOLD) {
    regen *= MANA_TORRENT_MULTIPLIER;
  }
  if ((hasSpecial(effects, SPECIAL_EFFECTS.DESPERATE_WELLS) || hasSpecial(effects, SPECIAL_EFFECTS.DESPAIR_WELLS)) && manaRatio < MANA_LOW_THRESHOLD) {
    regen *= MANA_CRISIS_MULTIPLIER;
  }
  if (hasSpecial(effects, SPECIAL_EFFECTS.PANIC_RESERVE) && manaRatio < MANA_CRITICAL_THRESHOLD) {
    regen *= PANIC_RESERVE_MULTIPLIER;
  }

  // Eternal Flow: skip incursion + multiplier below
  if (hasSpecial(effects, SPECIAL_EFFECTS.ETERNAL_FLOW)) {
    return regen * effects.regenMultiplier;
  }

  // Steady Stream: skip incursion only
  if (!hasSpecial(effects, SPECIAL_EFFECTS.STEADY_STREAM)) {
    regen *= (1 - incursionStrength);
  }

  return regen * effects.regenMultiplier;
}

/**
 * Compute click mana with special effects
 */
export function computeDynamicClickMana(
  effects: ComputedEffects,
  baseClickMana: number
): number {
  return Math.floor((baseClickMana + effects.clickManaBonus) * effects.clickManaMultiplier);
}