@jeremyckahn/farmhand/src/game-logic/reducers/plantTreeInPlot.ts

A farming game

import { itemsMap } from '../../data/maps.js'
import { getFinalCropItemIdFromSeedItemId } from '../../utils/getFinalCropItemIdFromSeedItemId.js'
import { getRandomizedLifespan } from '../../utils/getRandomizedLifespan.js'

import { decrementItemFromInventory } from './decrementItemFromInventory.js'
import { modifyForestPlotAt } from './modifyForestPlotAt.js'

export const plantTreeInPlot = (
  state: farmhand.state,
  x: number,
  y: number,
  saplingItemId: string
): farmhand.state => {
  if (
    !saplingItemId ||
    !state.inventory.some(({ id }) => id === saplingItemId)
  ) {
    return state
  }

  const row = state.forest[y]

  if (!row || row[x]) {
    // Out of bounds, or something is already planted at forest[y][x].
    return state
  }

  const finalTreeItemId = getFinalCropItemIdFromSeedItemId(saplingItemId)

  if (!finalTreeItemId) {
    return state
  }

  const defaultLifespan = itemsMap[finalTreeItemId]?.lifespan
  const lifespan =
    defaultLifespan !== undefined
      ? getRandomizedLifespan(defaultLifespan)
      : undefined

  state = modifyForestPlotAt(state, x, y, () => ({
    itemId: finalTreeItemId,
    daysOld: 0,
    daysSinceLastHarvest: 0,
    ...(lifespan !== undefined && { lifespan }),
  }))

  state = decrementItemFromInventory(state, saplingItemId)

  return {
    ...state,
    selectedForestItemId: state.inventory.find(({ id }) => id === saplingItemId)
      ? saplingItemId
      : '',
  }
}