bitburner-src/src/Hacknet/formulas/HacknetNodes.ts

import { BitNodeMultipliers } from "../../BitNode/BitNodeMultipliers";
import { HacknetNodeConstants } from "../data/Constants";

export function calculateMoneyGainRate(level: number, ram: number, cores: number, mult: number): number {
    const gainPerLevel = HacknetNodeConstants.MoneyGainPerLevel;

    const levelMult = (level * gainPerLevel);
    const ramMult = Math.pow(1.035, ram - 1);
    const coresMult = ((cores + 5) / 6);
    return levelMult *
           ramMult *
           coresMult *
           mult *
           BitNodeMultipliers.HacknetNodeMoney;
}

export function calculateLevelUpgradeCost(startingLevel: number, extraLevels=1, costMult=1): number {
    const sanitizedLevels = Math.round(extraLevels);
    if (isNaN(sanitizedLevels) || sanitizedLevels < 1) {
        return 0;
    }

    if (startingLevel >= HacknetNodeConstants.MaxLevel) {
        return Infinity;
    }

    const mult = HacknetNodeConstants.UpgradeLevelMult;
    let totalMultiplier = 0;
    let currLevel = startingLevel;
    for (let i = 0; i < sanitizedLevels; ++i) {
        totalMultiplier += (HacknetNodeConstants.LevelBaseCost * Math.pow(mult, currLevel));
        ++currLevel;
    }

    return HacknetNodeConstants.BaseCost / 2 * totalMultiplier * costMult;
}

export function calculateRamUpgradeCost(startingRam: number, extraLevels=1, costMult=1): number {
    const sanitizedLevels = Math.round(extraLevels);
    if (isNaN(sanitizedLevels) || sanitizedLevels < 1) {
        return 0;
    }

    if (startingRam >= HacknetNodeConstants.MaxRam) {
        return Infinity;
    }

    let totalCost = 0;
    let numUpgrades = Math.round(Math.log2(startingRam));
    let currentRam = startingRam;

    for (let i = 0; i < sanitizedLevels; ++i) {
        const baseCost = currentRam * HacknetNodeConstants.RamBaseCost;
        const mult = Math.pow(HacknetNodeConstants.UpgradeRamMult, numUpgrades);

        totalCost += (baseCost * mult);

        currentRam *= 2;
        ++numUpgrades;
    }

    totalCost *= costMult;

    return totalCost;
}

export function calculateCoreUpgradeCost(startingCore: number, extraLevels=1, costMult=1): number {
    const sanitizedCores = Math.round(extraLevels);
    if (isNaN(sanitizedCores) || sanitizedCores < 1) {
        return 0;
    }

    if (startingCore >= HacknetNodeConstants.MaxCores) {
        return Infinity;
    }

    const coreBaseCost  = HacknetNodeConstants.CoreBaseCost;
    const mult          = HacknetNodeConstants.UpgradeCoreMult;
    let totalCost       = 0;
    let currentCores    = startingCore;
    for (let i = 0; i < sanitizedCores; ++i) {
        totalCost += (coreBaseCost * Math.pow(mult, currentCores-1));
        ++currentCores;
    }

    totalCost *= costMult;

    return totalCost;
}

export function calculateNodeCost(n: number, mult=1): number {
    if(n <= 0) {
        return 0;
    }
    return HacknetNodeConstants.BaseCost * Math.pow(HacknetNodeConstants.PurchaseNextMult, n-1) * mult;
}