import type { AuraDefinition } from "./combatAuras";
import { WOW335_TALENT_NODES } from "./wow335Talents.generated";

export const WOW335_DEATH_KNIGHT_DESOLATION_TALENT_ID = "talent-2285";
export const WOW335_DEATH_KNIGHT_BLOOD_STRIKE_SPELL_ID = 45_902;
export const WOW335_DEATH_KNIGHT_BLOOD_STRIKE_ABILITY_ID = "wow335-death-knight-blood-strike";
export const WOW335_DEATH_KNIGHT_DESOLATION_AURA_ID = "wow335:death-knight:desolation";

const DESOLATION_NODE = WOW335_TALENT_NODES.find(
  (node) => node.id === WOW335_DEATH_KNIGHT_DESOLATION_TALENT_ID,
);

export interface Wow335DeathKnightDesolationProfile {
  readonly rank: number;
  readonly damageBonus: number;
  readonly durationMs: number;
  readonly triggerSpellId: number;
}

/**
 * Read the rank value and child trigger directly from the generated local DBC
 * talent row. The resolved tooltip is the source for the hidden child buff's
 * percentage and duration; fail closed if that generated text no longer fits.
 */
export function wow335DeathKnightDesolationProfile(
  rank: number,
): Wow335DeathKnightDesolationProfile | null {
  const normalizedRank = Math.trunc(rank);
  const talentRank = DESOLATION_NODE?.rankEffects[normalizedRank - 1];
  const description = DESOLATION_NODE?.rankDescriptions[normalizedRank - 1];
  if (normalizedRank < 1 || !talentRank || !description || talentRank.procChance !== 100) return null;

  const values = description.match(
    /^Your Blood Strikes cause you to deal (\d+(?:\.\d+)?)% additional damage with all attacks for the next (\d+(?:\.\d+)?) seconds\.$/,
  );
  const triggerSpellId = talentRank.effects.find((effect) => effect.triggerSpellId > 0)?.triggerSpellId ?? 0;
  if (!values || triggerSpellId <= 0) return null;

  const damageBonus = Number(values[1]) / 100;
  const durationMs = Number(values[2]) * 1_000;
  if (!Number.isFinite(damageBonus) || damageBonus <= 0 || !Number.isFinite(durationMs) || durationMs <= 0) return null;
  return { rank: normalizedRank, damageBonus, durationMs, triggerSpellId };
}

/** A landed Blood Strike refreshes the source-defined child buff. */
export function wow335DeathKnightDesolationShouldTrigger(
  rank: number,
  triggeringAbilityId: string,
  hitLanded: boolean,
  isMainHandHit = true,
): boolean {
  return hitLanded
    && isMainHandHit
    && triggeringAbilityId === WOW335_DEATH_KNIGHT_BLOOD_STRIKE_ABILITY_ID
    && wow335DeathKnightDesolationProfile(rank) !== null;
}

/**
 * Build the generic all-school damage-done aura used by both player and
 * generated-companion casts. No school or attack-kind filter is present:
 * the generated tooltip says "all attacks".
 */
export function wow335DeathKnightDesolationAuraDefinition(
  rank: number,
): AuraDefinition | null {
  const profile = wow335DeathKnightDesolationProfile(rank);
  if (!profile) return null;
  return {
    id: WOW335_DEATH_KNIGHT_DESOLATION_AURA_ID,
    name: "Desolation",
    description: `Blood Strike increases damage dealt by ${Math.round(profile.damageBonus * 100)}% for ${profile.durationMs / 1_000} seconds.`,
    disposition: "buff",
    durationMs: profile.durationMs,
    maxStacks: 1,
    stackBehavior: "replace",
    modifiers: [{
      kind: "damage",
      direction: "dealt",
      operation: "percent",
      value: profile.damageBonus,
    }],
  };
}