<?php
// app/Factories/MetricCalculatorFactory.php

namespace App\Factories;

use App\Contracts\MetricCalculatorInterface;
use App\Services\MetricCalculators\PreoperativeDaysCalculator;
use App\Services\MetricCalculators\LethalityCalculator;
use App\Services\MetricCalculators\AverageBedDaysCalculator;
use RuntimeException;

class MetricCalculatorFactory
{
    protected array $calculators = [];

    public function __construct()
    {
        $this->calculators = [
            18 => AverageBedDaysCalculator::class,
            19 => LethalityCalculator::class,
            21 => PreoperativeDaysCalculator::class,
        ];
    }

    public function getCalculator(int $metricId): MetricCalculatorInterface
    {
        if (!isset($this->calculators[$metricId])) {
            throw new RuntimeException("No calculator for metric ID: {$metricId}");
        }

        $class = $this->calculators[$metricId];
        return app($class);
    }

    public function getAllCalculators(): array
    {
        $calculators = [];
        foreach (array_keys($this->calculators) as $metricId) {
            $calculators[$metricId] = $this->getCalculator($metricId);
        }
        return $calculators;
    }
}