import { WOW335_TALENT_NODES } from "./wow335Talents.generated";

export const WOW335_DEATH_KNIGHT_BLOOD_GORGED_TALENT_ID = "talent-2034";

const BLOOD_GORGED_DAMAGE_CHILD_IDS = [50096, 50108, 50109, 50110, 50111] as const;
const BLOOD_GORGED_ARMOR_CHILD_IDS = [61274, 61275, 61276, 61277, 61278] as const;

/** Local Spell.dbc uses Death Knight family 15 and this three-word aura mask. */
export const WOW335_DEATH_KNIGHT_BLOOD_GORGED_FAMILY_NAME = 15;
export const WOW335_DEATH_KNIGHT_BLOOD_GORGED_FAMILY_MASK = [0x01400001, 0, 0] as const;

const BLOOD_GORGED_NODE = WOW335_TALENT_NODES.find(
  (node) => node.id === WOW335_DEATH_KNIGHT_BLOOD_GORGED_TALENT_ID,
);

export interface Wow335DeathKnightBloodGorgedProfile {
  readonly rank: number;
  readonly damageBonusPercent: number;
  readonly armorPenetrationPercent: number;
  readonly damageChildSpellId: number;
  readonly armorChildSpellId: number;
  readonly damageAuraType: 79;
  readonly damageSchoolMask: 127;
  readonly armorAuraType: 280;
  readonly spellFamilyName: 15;
  readonly spellFamilyMask: readonly [number, number, number];
}

/**
 * Read the rank values and child-spell links from the generated local talent
 * rows. Aura types and the family mask are verified against the local 3.3.5
 * Spell.dbc and recorded in docs/WOW_DEATH_KNIGHT_BLOOD_GORGED.md.
 */
export function wow335DeathKnightBloodGorgedProfile(
  rank: number,
): Wow335DeathKnightBloodGorgedProfile | null {
  const normalizedRank = Math.trunc(rank);
  const rankEffect = BLOOD_GORGED_NODE?.rankEffects[normalizedRank - 1];
  const rankDescription = BLOOD_GORGED_NODE?.rankDescriptions[normalizedRank - 1];
  if (normalizedRank < 1 || !rankEffect || !rankDescription) return null;

  const descriptionValues = rankDescription.match(
    /^When you are above 75% health, you deal (\d+)% more damage\. In addition, your attacks ignore up to (\d+)% of your opponent's armor at all times\.$/,
  );
  const damageBonusPercent = Number(descriptionValues?.[1]);
  const armorPenetrationPercent = Number(descriptionValues?.[2]);
  const damageChild = rankEffect.effects.find(
    (effect) => effect.triggerSpellId === BLOOD_GORGED_DAMAGE_CHILD_IDS[normalizedRank - 1],
  );
  const armorChild = rankEffect.effects.find(
    (effect) => effect.triggerSpellId === BLOOD_GORGED_ARMOR_CHILD_IDS[normalizedRank - 1],
  );

  if (!descriptionValues
    || !damageChild
    || !armorChild
    || damageChild.basePoints !== damageBonusPercent
    || armorChild.basePoints !== armorPenetrationPercent
    || damageBonusPercent <= 0
    || armorPenetrationPercent <= 0) return null;

  return {
    rank: normalizedRank,
    damageBonusPercent,
    armorPenetrationPercent,
    damageChildSpellId: damageChild.triggerSpellId,
    armorChildSpellId: armorChild.triggerSpellId,
    damageAuraType: 79,
    damageSchoolMask: 127,
    armorAuraType: 280,
    spellFamilyName: WOW335_DEATH_KNIGHT_BLOOD_GORGED_FAMILY_NAME,
    spellFamilyMask: WOW335_DEATH_KNIGHT_BLOOD_GORGED_FAMILY_MASK,
  };
}

/** The local DBC aura applies only to matching Death Knight family-15 spells. */
export function wow335DeathKnightBloodGorgedAffectsSpell(
  spellFamilyName: number,
  spellFamilyFlags: readonly [number, number, number],
): boolean {
  if (spellFamilyName !== WOW335_DEATH_KNIGHT_BLOOD_GORGED_FAMILY_NAME) return false;
  if (spellFamilyFlags.some((flags) => !Number.isSafeInteger(flags) || flags < 0 || flags > 0xFFFFFFFF)) return false;
  return WOW335_DEATH_KNIGHT_BLOOD_GORGED_FAMILY_MASK.some((mask, index) => (
    (spellFamilyFlags[index] & mask) !== 0
  ));
}

/** Above 75% is strict; exactly 75% does not receive the damage bonus. */
export function wow335DeathKnightBloodGorgedDamageBonusPercent(
  rank: number,
  currentHealth: number,
  maximumHealth: number,
  spellFamilyName: number,
  spellFamilyFlags: readonly [number, number, number],
): number {
  const profile = wow335DeathKnightBloodGorgedProfile(rank);
  if (!profile
    || !wow335DeathKnightBloodGorgedAffectsSpell(spellFamilyName, spellFamilyFlags)
    || !Number.isFinite(currentHealth)
    || currentHealth < 0
    || !Number.isFinite(maximumHealth)
    || maximumHealth <= 0
    || currentHealth <= maximumHealth * 0.75) return 0;
  return profile.damageBonusPercent;
}

/** Armor penetration is unconditional on health, but remains family-mask gated. */
export function wow335DeathKnightBloodGorgedArmorPenetrationPercent(
  rank: number,
  spellFamilyName: number,
  spellFamilyFlags: readonly [number, number, number],
): number {
  const profile = wow335DeathKnightBloodGorgedProfile(rank);
  if (!profile || !wow335DeathKnightBloodGorgedAffectsSpell(spellFamilyName, spellFamilyFlags)) return 0;
  return profile.armorPenetrationPercent;
}