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

use Throwable;
use Monolog\Formatter\JsonFormatter;
use Monolog\LogRecord;

class PDO extends JsonFormatter
{
    public function __construct(int $batchMode = self::BATCH_MODE_JSON, bool $appendNewline = false, bool $ignoreEmptyContextAndExtra = false, bool $includeStacktraces = true)
    {
        parent::__construct($batchMode, $appendNewline, $ignoreEmptyContextAndExtra, $includeStacktraces);
    }

    public function format(LogRecord $record): string
    {
        if (is_a($record->message, Throwable::class)) {
            $exception = $record->message;
            $message = $this->normalizeException($exception);
            $context = $record->context;
            $context['exception'] = $exception;
            if ($exception->getPrevious()) {
                $context['previous'] = $this->walkException($exception);
            }
            $new_record = new LogRecord(
                $record->datetime,
                $record->channel,
                $record->level,
                json_encode($message),
                $context,
                $record->extra
            );
            $record = $new_record;
        }
        $normalized = $this->normalize($record, $this->maxNormalizeDepth);
        return $normalized['message'];
    }

    protected function walkException(Throwable $exception, int $depth = 0): array
    {
        $output = [];
        $currentDepth = $depth;
        while ($previous = $exception->getPrevious() and $currentDepth < $this->maxNormalizeDepth) {
            $output []= $this->normalizeException($previous);
        }
        return $output;
    }
}