<?php

namespace App\Models;

use App\Events\PerceptronTrainingEnded;
use App\Services\DataSetReader;
use App\Services\IPerceptronIterationEventBuffer;

abstract class NetworkTraining
{
    protected int $epoch = 0;

    /**
     * @abstract
     * @var ActivationsFunctions
     */
    public ActivationsFunctions $activationFunction;

    public function __construct(
        protected DataSetReader $datasetReader,
        protected int $maxEpochs,
        protected IPerceptronIterationEventBuffer $iterationEventBuffer,
        protected string $sessionId,
        protected string $trainingId,
    ) {
    }

    abstract public function start() : void;
    abstract protected function stopCondition(): bool;

    protected function checkPassedMaxIterations(?float $finalError) {
        if ($this->epoch >= $this->maxEpochs) {
            $message = 'Le nombre maximal d\'epoch a été atteint';
            if ($finalError) {
                $message .= " avec une erreur finale de $finalError";
            }

            event(new PerceptronTrainingEnded($message, $this->sessionId, $this->trainingId));
        }
    }

    protected function addIterationToBuffer(float $error, array $synapticWeights) {
        $this->iterationEventBuffer->addIteration($this->epoch, $this->datasetReader->getLastReadLineIndex(), $error, $synapticWeights);
    }
}