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

export const WOW335_DEATH_KNIGHT_WANDERING_PLAGUE_TALENT_ID = "talent-2003";
export const WOW335_DEATH_KNIGHT_WANDERING_PLAGUE_DAMAGE_ABILITY_ID = "wow335-death-knight-wandering-plague";
export const WOW335_DEATH_KNIGHT_WANDERING_PLAGUE_DISEASE_TAGS = [
  "blood-plague",
  "frost-fever",
] as const;

const WANDERING_PLAGUE_TARGET_RADIUS_YARDS = 8;
const WANDERING_PLAGUE_INTERNAL_COOLDOWN_MS = 1_000;
const WANDERING_PLAGUE_TALENT = WOW335_TALENT_NODES.find(
  (node) => node.id === WOW335_DEATH_KNIGHT_WANDERING_PLAGUE_TALENT_ID,
);
const DEATH_KNIGHT_GLOBAL_MELEE_CRIT_TALENT_SPECS = [
  {
    talentId: "talent-1943",
    rankDescriptionPattern: /chance to critically hit with weapons, spells and abilities by (\d+(?:\.\d+)?)%/i,
  },
  {
    talentId: "talent-2043",
    rankDescriptionPattern: /critical strike chance with weapons and spells by (\d+(?:\.\d+)?)% at all times/i,
  },
] as const;
const WANDERING_PLAGUE_DISEASE_TAG_SET = new Set<string>(WOW335_DEATH_KNIGHT_WANDERING_PLAGUE_DISEASE_TAGS);

export interface Wow335DeathKnightWanderingPlagueProfile {
  readonly rank: number;
  readonly extraDamagePercent: number;
  readonly targetRadiusYards: number;
  readonly internalCooldownMs: number;
}

export interface Wow335DeathKnightWanderingPlagueProc {
  readonly extraDamage: number;
  readonly targetRadiusYards: number;
  readonly nextReadyAt: number;
}

/** Read the splash amount from the local generated 3.3.5a talent rank. */
export function wow335DeathKnightWanderingPlagueProfileForRank(
  rank: number,
): Wow335DeathKnightWanderingPlagueProfile | null {
  const normalizedRank = Math.max(0, Math.min(3, Math.trunc(rank)));
  if (normalizedRank <= 0) return null;
  const effect = WANDERING_PLAGUE_TALENT?.rankEffects[normalizedRank - 1]?.effects.find(
    (candidate) => candidate.auraType === 4,
  );
  const extraDamagePercent = Math.max(0, Math.trunc(effect?.basePoints ?? 0));
  if (extraDamagePercent <= 0) return null;
  return {
    rank: normalizedRank,
    extraDamagePercent,
    targetRadiusYards: WANDERING_PLAGUE_TARGET_RADIUS_YARDS,
    internalCooldownMs: WANDERING_PLAGUE_INTERNAL_COOLDOWN_MS,
  };
}

export function wow335DeathKnightWanderingPlagueIsDiseaseTag(tag: string | undefined): boolean {
  return tag !== undefined && WANDERING_PLAGUE_DISEASE_TAG_SET.has(tag);
}

/** Read the two generated global melee-crit passives for the live proc chance. */
export function wow335DeathKnightWanderingPlagueMeleeCritBonusPercentForTalentRanks(
  talentRanks: Readonly<Record<string, number>>,
): number {
  return DEATH_KNIGHT_GLOBAL_MELEE_CRIT_TALENT_SPECS.reduce((total, spec) => {
    const node = WOW335_TALENT_NODES.find((candidate) => candidate.id === spec.talentId);
    const rank = Math.max(0, Math.min(node?.rankDescriptions.length ?? 0,
      Math.trunc(talentRanks[spec.talentId] ?? 0)));
    if (rank <= 0) return total;
    const description = node?.rankDescriptions[rank - 1] ?? "";
    const match = description.match(spec.rankDescriptionPattern);
    return total + (match ? Number(match[1]) : 0);
  }, 0);
}

/** Resolve a qualifying disease tick against the source's live melee critical chance. */
export function wow335DeathKnightWanderingPlagueProcForDiseaseTick(
  rank: number,
  tag: string | undefined,
  tickDamage: number,
  meleeCriticalChancePercent: number,
  roll: number,
  now: number,
  readyAt: number,
): Wow335DeathKnightWanderingPlagueProc | null {
  const profile = wow335DeathKnightWanderingPlagueProfileForRank(rank);
  if (!profile
    || !wow335DeathKnightWanderingPlagueIsDiseaseTag(tag)
    || !Number.isFinite(tickDamage)
    || tickDamage <= 0
    || !Number.isFinite(meleeCriticalChancePercent)
    || meleeCriticalChancePercent <= 0
    || !Number.isFinite(roll)
    || roll < 0
    || roll >= Math.min(100, meleeCriticalChancePercent) / 100
    || !Number.isFinite(now)
    || !Number.isFinite(readyAt)
    || now < readyAt) return null;

  return {
    // Damage is integer-valued in this runtime; round the source percentage once.
    extraDamage: Math.max(0, Math.round(tickDamage * profile.extraDamagePercent / 100)),
    targetRadiusYards: profile.targetRadiusYards,
    nextReadyAt: now + profile.internalCooldownMs,
  };
}