import { useCallback, useEffect, useMemo, useRef, useState } from "react";
import { UnitType, usePlayer } from "../providers/PlayerProvider";
import styles from "../styles/Army.module.css";
import { calculateBalance, toReadable } from "./Counter";
import PixelatedQuote from "./PixelatedQuote";

const PRECISION = BigInt(10000);
const PRICE_FACTOR = BigInt(11500);

const base_cost: Record<UnitType, bigint> = {
  0: BigInt(380000),
  1: BigInt(3420000),
  2: BigInt(30096000),
  3: BigInt(255816000),
};

const profits: Record<UnitType, bigint> = {
  0: BigInt(2533),
  1: BigInt(27863),
  2: BigInt(306493),
  3: BigInt(3371423),
};

function calculateUnitPrice(
  unit: UnitType,
  currentLevel: number,
  units: number
) {
  let rollingPriceCalculation = base_cost[unit];
  let price = BigInt(0);

  // Each level costs 15% more than previous
  for (let i = 0; i < currentLevel + units; i++) {
    if (i >= currentLevel) {
      price += rollingPriceCalculation;
    }
    rollingPriceCalculation =
      (rollingPriceCalculation * PRICE_FACTOR) / PRECISION;
  }
  return price;
}

function calculateProfitPerSecond(unit: UnitType, level: number) {
  // Each next unit scales progressivelly better
  return BigInt(level) * profits[unit];
}

const unitTypeToCss: Record<UnitType, string> = {
  0: styles.moloch_denier,
  1: styles.apprentice,
  2: styles.anointed,
  3: styles.champion,
};

const unitTypeToName: Record<UnitType, string> = {
  0: "Moloch denier",
  1: "Apprentice",
  2: "Anointed",
  3: "Champion",
};

const defaultAvailabilityMap: Record<UnitType, boolean> = {
  0: false,
  1: false,
  2: false,
  3: false,
};

const unitDiscoveredAt: Record<UnitType, bigint> = {
  0: BigInt(0),
  1: BigInt(300_0000),
  2: BigInt(2800_0000),
  3: BigInt(24000_0000),
};
const unitAvailableToDiscoverAt: Record<UnitType, bigint> = {
  0: BigInt(0),
  1: BigInt(200_0000),
  2: BigInt(2000_0000),
  3: BigInt(25000_0000),
};

interface UnitProps {
  addUnit: (unitType: UnitType) => void;
  unitType: UnitType;
  canPurchase: boolean;
  isShrouded: boolean;
  n_units: number;
}

const Unit = ({
  addUnit,
  unitType,
  canPurchase,
  isShrouded,
  n_units,
}: UnitProps) => {
  const [unitPrice, unitProfit] = useMemo(() => {
    return [
      toReadable(calculateUnitPrice(unitType, n_units, 1)),
      toReadable(calculateProfitPerSecond(unitType, n_units)),
    ];
  }, [n_units, unitType]);
  return (
    <div
      onClick={() => addUnit(unitType)}
      className={`${styles.armyUnit} ${canPurchase ? "" : styles.isUnavailable
        }`}
    >
      <div
        className={`
      ${unitTypeToCss[unitType]} 
      ${styles.person} 
      ${styles.static} 
      ${isShrouded ? styles.isShrouded : ""}
    `}
      />
      <span className={`${styles.unitName} ${styles.uiElement}`}>
        {isShrouded ? "???????" : unitTypeToName[unitType]}
      </span>
      {isShrouded ? null : (
        <span className={`${styles.unitPrice} ${styles.uiElement}`}>
          {unitPrice} <small>GELD</small>
        </span>
      )}
      {n_units > 0 ? (
        <span className={`${styles.unitSupply} ${styles.uiElement}`}>
          {n_units}
        </span>
      ) : null}
      {n_units > 0 ? (
        <span className={`${styles.unitProfit} ${styles.uiElement}`}>
          {unitProfit} <small>per sec</small>
        </span>
      ) : null}
    </div>
  );
};

const Army = () => {
  const { army, addUnit, isRegistered, player, balance } = usePlayer();
  const [canPurchase, setCanPurchase] = useState<Record<UnitType, boolean>>(
    defaultAvailabilityMap
  );
  const [isShrouded, setIsShrouded] = useState<Record<UnitType, boolean>>(
    defaultAvailabilityMap
  );
  const [canKnowAbout, setCanKnowAbout] = useState<Record<UnitType, boolean>>(
    defaultAvailabilityMap
  );
  const balanceCount = useRef(BigInt(balance ?? 0));

  const setAvailabilities = useCallback(() => {
    if (isRegistered) {
      const totalMinted =
        (player?.total_minted ?? BigInt(0)) +
        (balanceCount.current - (balance ?? BigInt(0)));
      const n_units: Record<UnitType, number> = {
        0: army?.moloch_denier.level ?? 0,
        1: army?.apprentice.level ?? 0,
        2: army?.anointed.level ?? 0,
        3: army?.champion.level ?? 0,
      };
      const inShroud = {
        0: totalMinted < unitDiscoveredAt[0],
        1: totalMinted < unitDiscoveredAt[1],
        2: totalMinted < unitDiscoveredAt[2],
        3: totalMinted < unitDiscoveredAt[3],
      };
      const isKnown = {
        0: totalMinted >= unitAvailableToDiscoverAt[0],
        1: totalMinted >= unitAvailableToDiscoverAt[1],
        2: totalMinted >= unitAvailableToDiscoverAt[2],
        3: totalMinted >= unitAvailableToDiscoverAt[3],
      };
      const canActuallyBuy = {
        0:
          balanceCount.current >= calculateUnitPrice(0, n_units[0], 1) &&
          isKnown[0] &&
          !inShroud[0],
        1:
          balanceCount.current >= calculateUnitPrice(1, n_units[1], 1) &&
          isKnown[1] &&
          !inShroud[1],
        2:
          balanceCount.current >= calculateUnitPrice(2, n_units[2], 1) &&
          isKnown[2] &&
          !inShroud[2],
        3:
          balanceCount.current >= calculateUnitPrice(3, n_units[3], 1) &&
          isKnown[3] &&
          !inShroud[3],
      };
      setCanPurchase(canActuallyBuy);
      setIsShrouded(inShroud);
      setCanKnowAbout(isKnown);
    } else {
      setCanPurchase(defaultAvailabilityMap);
      setIsShrouded(defaultAvailabilityMap);
      setCanKnowAbout(defaultAvailabilityMap);
    }
  }, [army, balance, isRegistered, player?.total_minted]);

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

  return (
    <>
      <div
        className={`${styles.tavern_keeper} ${styles.person} ${styles.static}`}
      >
        <PixelatedQuote />
      </div>
      <div className={styles.armyUnits}>
        {canKnowAbout[0] && (
          <Unit
            n_units={army?.moloch_denier.level ?? 0}
            addUnit={addUnit}
            unitType={0}
            canPurchase={canPurchase[0]}
            isShrouded={isShrouded[0]}
          />
        )}
        {canKnowAbout[1] && (
          <Unit
            n_units={army?.apprentice.level ?? 0}
            addUnit={addUnit}
            unitType={1}
            canPurchase={canPurchase[1]}
            isShrouded={isShrouded[1]}
          />
        )}
        {canKnowAbout[2] && (
          <Unit
            n_units={army?.anointed.level ?? 0}
            addUnit={addUnit}
            unitType={2}
            canPurchase={canPurchase[2]}
            isShrouded={isShrouded[2]}
          />
        )}
        {canKnowAbout[3] && (
          <Unit
            n_units={army?.champion.level ?? 0}
            addUnit={addUnit}
            unitType={3}
            canPurchase={canPurchase[3]}
            isShrouded={isShrouded[3]}
          />
        )}
      </div>
    </>
  );
};

export default Army;