import { isRomClassId, type ClassId, type RomClassId } from "../app/characterCatalog";
import catalog from "./romPlayerCatalog.generated.json";

type SourceStatName = "strength" | "stamina" | "intellect" | "wisdom" | "agility" | "health" | "mana";
interface GrowthRow { readonly levelOne: number; readonly flatGrowth: number; readonly percentGrowth: number }
type GrowthTable = Readonly<Record<RomClassId, Readonly<Record<SourceStatName, GrowthRow>>>>;

const GROWTH = catalog.baseStatGrowth as unknown as GrowthTable;

function sourceValue(row: GrowthRow, level: number): number {
  const safeLevel = Math.max(1, Math.min(80, Math.trunc(level)));
  let value = row.levelOne;
  for (let current = 2; current <= safeLevel; current += 1) value = value * (1 + row.percentGrowth) + row.flatGrowth;
  return Math.max(0, value);
}

export interface RomNativeBaseStats {
  readonly strength: number;
  readonly stamina: number;
  readonly intellect: number;
  readonly wisdom: number;
  readonly agility: number;
  readonly health: number;
  readonly mana: number;
}

export function romNativeClassBaseStats(classId: RomClassId, level: number): RomNativeBaseStats {
  const rows = GROWTH[classId];
  return Object.freeze({
    strength: sourceValue(rows.strength, level),
    stamina: sourceValue(rows.stamina, level),
    intellect: sourceValue(rows.intellect, level),
    wisdom: sourceValue(rows.wisdom, level),
    agility: sourceValue(rows.agility, level),
    health: sourceValue(rows.health, level),
    mana: sourceValue(rows.mana, level),
  });
}

export function romDualClassBaseStats(
  primaryClassId: ClassId,
  secondaryClassId: ClassId | null | undefined,
  level: number,
): RomNativeBaseStats | null {
  if (!isRomClassId(primaryClassId)) return null;
  const primary = romNativeClassBaseStats(primaryClassId, level);
  if (!secondaryClassId || !isRomClassId(secondaryClassId)) return primary;
  const secondary = romNativeClassBaseStats(secondaryClassId, level);
  return Object.freeze(Object.fromEntries(Object.keys(primary).map((key) => [
    key,
    primary[key as keyof RomNativeBaseStats] + secondary[key as keyof RomNativeBaseStats] * .1,
  ])) as unknown as RomNativeBaseStats);
}