@jeremyckahn/farmhand/src/common/utils.ts

A farming game

import { itemsMap } from '../data/maps.js'
import { randomStream } from '../enums.js'
import { getValueAdjustmentStream } from '../utils/getValueAdjustmentStream.js'

import { randomNumberService } from './services/randomNumber.ts'

/**
 * @param stream Optional name of the random number stream being drawn from.
 * See RandomNumberService#generateRandomNumber.
 */
export const random = (stream?: randomStream) => {
  return randomNumberService.generateRandomNumber(stream)
}

export const generateValueAdjustments = (
  priceCrashes: Partial<Record<string, farmhand.priceEvent>> = {},
  priceSurges: Partial<Record<string, farmhand.priceEvent>> = {}
): Record<string, number> =>
  Object.keys(itemsMap).reduce(
    (acc, key) => {
      if (itemsMap[key].doesPriceFluctuate) {
        if (priceCrashes[key]) {
          acc[key] = 0.5
        } else if (priceSurges[key]) {
          acc[key] = 1.5
        } else {
          acc[key] = random(getValueAdjustmentStream(key)) + 0.5
        }
      }

      return acc
    },
    {} as Record<string, number>
  )