gregory-jagermeister_Fantasy-Content-Generator/generators/loot.ts

import { currency, lootTables } from "main";

export function generateLoot(enableCurrency: boolean, currencyFrequency: number, currencyTypes: currency[], lootTable: lootTables) {
    const adjectives = lootTable.adj;
    const nouns = lootTable.nouns;
    
    const ItemAmount = Math.floor(Math.random() * (5 - 1 + 1)) + 1;

    let loot = '';

    for (let index = 0; index < ItemAmount; index++) {
        const randomAdjective = adjectives[Math.floor(Math.random() * adjectives.length)];
        const amount = generateRareHighNumber(50, 0.1);
        const vowels = ["a", "e", "i", "o", "u"];
        const randomNoun = nouns[Math.floor(Math.random() * nouns.length)]; 
        const vowelOrNot = isFirstCharInArray(vowels, randomAdjective) ? "an" : "a";
        let addS = randomNoun;
        if (!(randomNoun[randomNoun.length-1] === "e") && !(randomNoun[randomNoun.length] === "s")) {
            addS = randomNoun[randomNoun.length] === "s" ? randomNoun + "'s" : randomNoun + "s";
        }
            amount > 1 ? loot += `${amount} ${randomAdjective} ${addS}` : loot += `${vowelOrNot} ${randomAdjective} ${randomNoun}`;
        loot += ", "
    }

    if (enableCurrency) {
        let currencyLoot = '';
        const shouldGenCurrency = Math.floor(Math.random() * 100);
        if (shouldGenCurrency < currencyFrequency) {
            currencyTypes.forEach(element => {
                const randomCurrencyAmount = generateRareHighNumberByRarity(element.rarity);
                if (randomCurrencyAmount > 0) {
                    currencyLoot += randomCurrencyAmount + " " + element.name + ", ";
                }
            });
        }

        loot += currencyLoot;
    }

    return loot;
}
function isFirstCharInArray(array: string[], string: string) {
    return array.includes(string[0]);
}
 
function generateRareHighNumber(maxNumber: number, rarityFactor: number) {
    const randomNumber = Math.random();
    
    if (randomNumber < rarityFactor) {
      return Math.floor(Math.random() * maxNumber);
    } else {
      return Math.floor(Math.random() * (maxNumber / 10));
    }
}
  
function generateRareHighNumberByRarity(rarity: string) {
    let rarityFactor = 0;
    let maxNumber = 0;
    const randomNumber = Math.random();
    const isZero = Math.random();

    if (rarity === "common" && isZero > 0.3) {
        rarityFactor = 0.7;
        maxNumber = 300;
    }

    if (rarity === "uncommon" && isZero > 0.5) {
        rarityFactor = 0.5;
        maxNumber = 150;
    }

    if (rarity === "rare" && isZero > 0.8) {
        rarityFactor = 0.2
        maxNumber = 30
    }

    if (rarity === "rarest" && isZero > 0.98) {
        rarityFactor = 0.02
        maxNumber = 10
    }

    if (rarityFactor === 0) {
        return 0;
    }
    
    if (randomNumber < rarityFactor) {
      return Math.floor(Math.random() * maxNumber);
    } else {
      return Math.floor(Math.random() * (maxNumber / 10));
    }
}