<?php

namespace App\Model\Building;

use App\Model\Unit;
use App\Model\Village;

class Farm extends ResourceGenerator
{
  public string $unitType = 'Farmer';
  public int $buildTimeFactor = 1;
  public int $maxLevel = 25;

  public array $resourceRequirements = [
    'wood' => 1.0,
    'clay' => 1.0,
    'iron' => 1.0,
  ];

  public string $resourceType = 'food';

  public function getResourceIncrementor(): int
  {
    $populationDemand = array_reduce(
      Village::getUnits($this->villageId, Village::FETCH_UNIT_RESIDENCE),
      function ($carry, Unit $unit) {
        return $carry + $unit->getPopulationDemand();
      }
    );

    return parent::getResourceIncrementor() - $populationDemand;
  }
}