import type { AuraDefinition } from "./combatAuras";

export const WOW335_MAGE_ARCANE_POTENCY_TALENT_ID = "talent-1725";
export const WOW335_MAGE_MASTER_OF_ELEMENTS_TALENT_ID = "talent-1639";
export const WOW335_MAGE_ARCANE_POTENCY_TAG = "wow335-mage-arcane-potency";

const ARCANE_POTENCY_CRIT_BONUS_PERCENT_BY_RANK = [0, 15, 30] as const;

export type Wow335MageArcanePotencyTrigger =
  | "presence-of-mind"
  | "arcane-concentration-clearcasting"
  | "other";

export interface Wow335MageArcanePotencyCastProfile {
  readonly consumesCharge: boolean;
  readonly criticalChanceBonusPercent: number;
}

function normalizedRank(rank: number, maximum: number): number {
  return Number.isFinite(rank) ? Math.max(0, Math.min(maximum, Math.trunc(rank))) : 0;
}

/** Local talent rank rows 31571/31572 grant 15%/30% crit to the next damaging spell. */
export function wow335MageArcanePotencyCriticalChanceBonusPercent(rank: number): number {
  return ARCANE_POTENCY_CRIT_BONUS_PERCENT_BY_RANK[normalizedRank(rank, 2)] ?? 0;
}

/**
 * Arcane Potency is earned only from Presence of Mind or Arcane Concentration's
 * Clearcasting proc. A different source of Clearcasting does not qualify.
 */
export function wow335MageArcanePotencyCanProc(
  rank: number,
  trigger: Wow335MageArcanePotencyTrigger,
): boolean {
  return normalizedRank(rank, 2) > 0 && trigger !== "other";
}

/**
 * The next damaging spell gains the rank's crit bonus. The tooltip consumes
 * the buff on any spell cast, so callers consume whenever `auraActive` is true,
 * even if the cast cannot deal damage or critically strike.
 */
export function wow335MageArcanePotencyCastProfile(
  rank: number,
  auraActive: boolean,
  abilityDealsDirectDamage: boolean,
): Wow335MageArcanePotencyCastProfile {
  return {
    consumesCharge: auraActive,
    criticalChanceBonusPercent: auraActive && abilityDealsDirectDamage
      ? wow335MageArcanePotencyCriticalChanceBonusPercent(rank)
      : 0,
  };
}

export const WOW335_MAGE_ARCANE_POTENCY_AURA: AuraDefinition = {
  id: "wow335:mage:arcane-potency",
  name: "Arcane Potency",
  description: "Your next damaging spell gains critical strike chance after Presence of Mind or Clearcasting.",
  disposition: "buff",
  // The generated row supplies no expiration; the aura is consumed on the next spell cast.
  durationMs: null,
  maxStacks: 1,
  stackBehavior: "replace",
  utilityTags: [WOW335_MAGE_ARCANE_POTENCY_TAG],
};

/**
 * The passive +1/2/3% spell crit is already represented by generated rank
 * descriptions in talentModifiers. Only rank 3 (spell 29076) has the
 * executable local auraType 4 mana-refund effect; ranks 1/2 have effectType 0.
 */
export function wow335MageMasterOfElementsManaRefundPercent(rank: number): number {
  return normalizedRank(rank, 3) === 3 ? 40 : 0;
}

/**
 * Refund 40% of the Mana actually spent by an eligible direct spell critical.
 * “Direct” excludes periodic damage, including channel pulses and DoT ticks;
 * callers supply false for those events. The caller supplies the resolved spend
 * after cast discounts (for example, Clearcasting makes that spend zero).
 */
export function wow335MageMasterOfElementsManaRefund(
  rank: number,
  manaSpent: number,
  directDamageSpell: boolean,
  critical: boolean,
): number {
  const refundPercent = wow335MageMasterOfElementsManaRefundPercent(rank);
  if (refundPercent <= 0 || !directDamageSpell || !critical || !Number.isFinite(manaSpent)) return 0;
  return Math.max(0, Math.round(Math.max(0, manaSpent) * refundPercent / 100));
}