import { useEffect, useReducer, useRef } from "react";
import { usePlayer } from "../providers/PlayerProvider"
import styles from "../styles/Header.module.css"

const calculateBalance = (balance: bigint, perSecond: bigint, lastRaidedAt: bigint) => {
  // convert to milliseconds trick so we get a more smooth counter
  const millisecondsSinceLastRaid =
    (new Date()).getTime() - parseInt(lastRaidedAt.toString()) * 1000;
  return (
    balance +
    (BigInt(millisecondsSinceLastRaid) * (perSecond * BigInt(10000) /* decimals */)
      / BigInt(1000) /* deduct milliseconds*/))
}

const toReadable = (value: bigint) => {
  value = value / BigInt(10000);
  const suffixes = [
    { value: BigInt('1000'), suffix: 'thousand' },
    { value: BigInt('1000000'), suffix: 'million' },
    { value: BigInt('1000000000'), suffix: 'billion' },
    { value: BigInt('1000000000000'), suffix: 'trillion' },
    { value: BigInt('1000000000000000'), suffix: 'quadrillion' },
    { value: BigInt('1000000000000000000'), suffix: 'quintillion' },
    { value: BigInt('1000000000000000000000'), suffix: 'sextillion' },
    { value: BigInt('1000000000000000000000000'), suffix: 'septillion' },
    { value: BigInt('1000000000000000000000000000'), suffix: 'octillion' },
    { value: BigInt('1000000000000000000000000000000'), suffix: 'nonillion' },
    { value: BigInt('1000000000000000000000000000000000'), suffix: 'decillion' },
    { value: BigInt('1000000000000000000000000000000000000'), suffix: 'undecillion' },
    { value: BigInt('1000000000000000000000000000000000000000'), suffix: 'duodecillion' },
    { value: BigInt('1000000000000000000000000000000000000000000'), suffix: 'tredecillion' },
    { value: BigInt('1000000000000000000000000000000000000000000000'), suffix: 'quattuordecillion' },
    { value: BigInt('1000000000000000000000000000000000000000000000000'), suffix: 'quindecillion' },
    { value: BigInt('1000000000000000000000000000000000000000000000000000'), suffix: 'sexdecillion' },
    { value: BigInt('1000000000000000000000000000000000000000000000000000000'), suffix: 'septendecillion' },
  ];

  for (let i = 0; i < suffixes.length; i++) {
    if (value < suffixes[i].value) {
      if (i == 0) {
        return value;
      } else {
        const divided = value / suffixes[i - 1].value;
        const remainder = value % suffixes[i - 1].value;
        return `${divided.toString()}.${remainder.toString()} ${suffixes[i - 1].suffix}`;
      }
    }
  }

  return value.toString();
}

const Counter = () => {
  const { balance, army, player } = usePlayer();
  const [, render] = useReducer(p => !p, false);
  const balanceCount = useRef(balance.toString() ?? "0")

  useEffect(() => {
    const tickInterval = setInterval(() => {
      balanceCount.current = toReadable(calculateBalance(
        balance,
        army?.profit_per_second ?? BigInt(0),
        player?.last_raided_at ?? BigInt(0)
      )).toString();
      render();
    }, 100);
    return () => clearInterval(tickInterval)
  }, [balance, army?.profit_per_second, player?.last_raided_at])

  return <p className={styles.counter}>
    {balanceCount.current} GELD
  </p>
}

export default Counter