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

export const WOW335_SHAMAN_ELEMENTAL_FOCUS_TALENT_ID = "talent-574";
export const WOW335_SHAMAN_ELEMENTAL_FOCUS_AURA_TAG = "wow335-shaman-elemental-focus-clearcasting";
export const WOW335_SHAMAN_ELEMENTAL_FOCUS_DURATION_MS = 15_000;

const ELEMENTAL_FOCUS_SOURCE = WOW335_TALENT_NODES.find((node) => (
  node.id === WOW335_SHAMAN_ELEMENTAL_FOCUS_TALENT_ID
));

export interface Wow335ShamanElementalFocusProfile {
  readonly procChancePercent: number;
  readonly costReductionPercent: number;
  readonly charges: 2;
  readonly durationMs: number;
}

/** Reads the proc chance and discount from the generated local talent tooltip. */
export function wow335ShamanElementalFocusProfileForRank(
  rank: number,
): Wow335ShamanElementalFocusProfile | null {
  const safeRank = Math.max(0, Math.min(2, Math.trunc(Number.isFinite(rank) ? rank : 0)));
  const description = safeRank > 0
    ? ELEMENTAL_FOCUS_SOURCE?.rankDescriptions[safeRank - 1]
    : undefined;
  const match = description?.match(/you have a (\d+(?:\.\d+)?)% chance.*?next two .*? by (\d+(?:\.\d+)?)%/i);
  if (!match) return null;
  const procChancePercent = Number(match[1]);
  const costReductionPercent = Number(match[2]);
  if (!Number.isFinite(procChancePercent) || !Number.isFinite(costReductionPercent)) return null;
  return {
    procChancePercent,
    costReductionPercent,
    charges: 2,
    // The local triggered Clearcasting effect is 15 seconds (SpellDuration row 8).
    durationMs: WOW335_SHAMAN_ELEMENTAL_FOCUS_DURATION_MS,
  };
}

export function wow335ShamanElementalFocusShouldProc(
  profile: Wow335ShamanElementalFocusProfile | null,
  school: string,
  critical: boolean,
  periodic: boolean,
  roll: number,
): boolean {
  return profile !== null
    && critical
    && !periodic
    && ["fire", "frost", "nature"].includes(school.toLowerCase())
    && Number.isFinite(roll)
    && roll >= 0
    && roll < profile.procChancePercent / 100;
}