import { z } from 'zod';

/** XP required to go from level L to L+1. */
export function xpForNextLevel(level: number): number {
  return 5 * level * level + 50 * level + 100;
}

/** Total XP needed to reach a given level from 0. */
export function totalXpForLevel(level: number): number {
  let total = 0;
  for (let i = 0; i < level; i += 1) {
    total += xpForNextLevel(i);
  }
  return total;
}

/** Derive level from cumulative XP. */
export function levelFromXp(xp: number): number {
  let level = 0;
  let remaining = Math.max(0, xp);
  while (remaining >= xpForNextLevel(level)) {
    remaining -= xpForNextLevel(level);
    level += 1;
    if (level > 1000) {
      break;
    }
  }
  return level;
}

export function progressInLevel(xp: number): { level: number; intoLevel: number; needed: number } {
  const level = levelFromXp(xp);
  const base = totalXpForLevel(level);
  const intoLevel = xp - base;
  const needed = xpForNextLevel(level);
  return { level, intoLevel, needed };
}

export function randomInt(min: number, max: number): number {
  return Math.floor(Math.random() * (max - min + 1)) + min;
}

export const LevelUpModeSchema = z.enum(['CHANNEL', 'DM', 'OFF']);
export type LevelUpMode = z.infer<typeof LevelUpModeSchema>;

export const MultiplierMapSchema = z.record(z.string(), z.number().positive());
export type MultiplierMap = z.infer<typeof MultiplierMapSchema>;

export function parseMultiplierMap(raw: unknown): MultiplierMap {
  const parsed = MultiplierMapSchema.safeParse(raw);
  return parsed.success ? parsed.data : {};
}

export function formatCurrency(amount: number, symbol: string, name: string): string {
  return `${symbol} ${amount.toLocaleString()} ${name}`;
}

export const EIGHT_BALL_ANSWERS = {
  de: [
    'Ja.',
    'Nein.',
    'Vielleicht.',
    'Frag später nochmal.',
    'Sieht gut aus.',
    'Zweifelhaft.',
    'Auf keinen Fall.',
    'Absolut.'
  ],
  en: [
    'Yes.',
    'No.',
    'Maybe.',
    'Ask again later.',
    'Looks good.',
    'Doubtful.',
    'Absolutely not.',
    'Absolutely.'
  ]
} as const;

export const TRIVIA_QUESTIONS = [
  {
    q: { de: 'Welche Farbe hat der Himmel an einem klaren Tag?', en: 'What color is the sky on a clear day?' },
    options: { de: ['Blau', 'Grün', 'Rot', 'Gelb'], en: ['Blue', 'Green', 'Red', 'Yellow'] },
    answer: 0
  },
  {
    q: { de: 'Wie viele Kontinente gibt es?', en: 'How many continents are there?' },
    options: { de: ['5', '6', '7', '8'], en: ['5', '6', '7', '8'] },
    answer: 2
  },
  {
    q: { de: 'Welches Tier ist ein Säugetier?', en: 'Which animal is a mammal?' },
    options: { de: ['Hai', 'Delphin', 'Thunfisch', 'Lachs'], en: ['Shark', 'Dolphin', 'Tuna', 'Salmon'] },
    answer: 1
  },
  {
    q: { de: 'Was ist 2 + 2?', en: 'What is 2 + 2?' },
    options: { de: ['3', '4', '5', '22'], en: ['3', '4', '5', '22'] },
    answer: 1
  },
  {
    q: { de: 'Hauptstadt von Frankreich?', en: 'Capital of France?' },
    options: { de: ['Berlin', 'Madrid', 'Paris', 'Rom'], en: ['Berlin', 'Madrid', 'Paris', 'Rome'] },
    answer: 2
  }
] as const;

export const HANGMAN_WORDS = {
  de: ['DISCORD', 'NEXUMI', 'SERVER', 'MODERATION', 'BOT', 'KANAL', 'ROLLE'],
  en: ['DISCORD', 'NEXUMI', 'SERVER', 'MODERATION', 'BOT', 'CHANNEL', 'ROLE']
} as const;