<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

abstract class Perceptron extends Model
{
    public function __construct(
        private array $synaptic_weights,
    ) {
        $this->synaptic_weights = $synaptic_weights;
    }

    public function test(array $inputs): int
    {
        $inputs = array_merge([1], $inputs); // Add bias input

        if (count($inputs) !== count($this->synaptic_weights)) { // Check
            throw new \InvalidArgumentException("Number of inputs must match number of synaptic weights.");
        }

        $weighted_sum = array_sum(array_map(fn($input, $weight) => $input * $weight, $inputs, $this->synaptic_weights));
        return $this->activationFunction($weighted_sum);
    }

    abstract public function activationFunction(float $weighted_sum): int;

    public function getSynapticWeights(): array
    {
        return $this->synaptic_weights;
    }

    public function setSynapticWeights(array $synaptic_weights): void
    {
        $this->synaptic_weights = $synaptic_weights;
    }
}