<?php
namespace Incoviba\Common\Implement\Log\Processor;

use Throwable;
use Monolog\LogRecord;
use Monolog\Processor\ProcessorInterface;

class Exception implements ProcessorInterface
{
    public function __invoke(LogRecord $record): LogRecord
    {
        $context = $record->context;
        $changed = false;
        array_walk_recursive($context, function (&$item) use (&$changed) {
            if (is_a($item, Throwable::class)) {
                $item = $this->processException($item);
                $changed = true;
            }
        });
        if ($changed) {
            $new_record = new LogRecord(
                $record->datetime,
                $record->channel,
                $record->level,
                $record->message,
                $context,
                $record->extra
            );
            $record = $new_record;
        }
        if (is_a($record->message, Throwable::class)) {
            $exception = $record->message;
            $output = $this->processException($exception);
            $message = $output['message'];
            if (array_key_exists('exception', $context)) {
                $context['other_exception'] = $context['exception'];
            }
            $context['exception'] = $output;
            $new_record = new LogRecord(
                $record->datetime,
                $record->channel,
                $record->level,
                $message,
                $context,
                $record->extra
            );
            $record = $new_record;
        }

        return $record;
    }

    protected function processException(Throwable $exception): array
    {
        $output = [
            'class' => get_class($exception),
            'code' => $exception->getCode(),
            'message' => $exception->getMessage(),
            'file' => $exception->getFile(),
            'line' => $exception->getLine(),
            'trace' => $exception->getTraceAsString(),
        ];
        if ($exception->getPrevious() !== null) {
            $output['previous'] = $this->processException($exception);
        }
        return $output;
    }
}