<?php

/*
 * This file is part of the Monolog package.
 *
 * (c) Jordi Boggiano <j.boggiano@seld.be>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Monolog\Formatter;

use Exception;
use Monolog\Utils;

/**
 * Normalizes incoming records to remove objects/resources so it's easier to dump to various targets
 *
 * @author Jordi Boggiano <j.boggiano@seld.be>
 */
class NormalizerFormatter implements FormatterInterface
{
    const SIMPLE_DATE = "Y-m-d H:i:s";

    protected $dateFormat;
    protected $maxDepth;

    /**
     * @param string $dateFormat The format of the timestamp: one supported by DateTime::format
     * @param int $maxDepth
     */
    public function __construct($dateFormat = null, $maxDepth = 9)
    {
        $this->dateFormat = $dateFormat ?: static::SIMPLE_DATE;
        $this->maxDepth = $maxDepth;
        if (!function_exists('json_encode')) {
            throw new \RuntimeException('PHP\'s json extension is required to use Monolog\'s NormalizerFormatter');
        }
    }

    /**
     * {@inheritdoc}
     */
    public function format(array $record)
    {
        return $this->normalize($record);
    }

    /**
     * {@inheritdoc}
     */
    public function formatBatch(array $records)
    {
        foreach ($records as $key => $record) {
            $records[$key] = $this->format($record);
        }

        return $records;
    }

    /**
     * @return int
     */
    public function getMaxDepth()
    {
        return $this->maxDepth;
    }

    /**
     * @param int $maxDepth
     */
    public function setMaxDepth($maxDepth)
    {
        $this->maxDepth = $maxDepth;
    }

    protected function normalize($data, $depth = 0)
    {
        if ($depth > $this->maxDepth) {
            return 'Over '.$this->maxDepth.' levels deep, aborting normalization';
        }

        if (null === $data || is_scalar($data)) {
            if (is_float($data)) {
                if (is_infinite($data)) {
                    return ($data > 0 ? '' : '-') . 'INF';
                }
                if (is_nan($data)) {
                    return 'NaN';
                }
            }

            return $data;
        }

        if (is_array($data)) {
            $normalized = array();

            $count = 1;
            foreach ($data as $key => $value) {
                if ($count++ > 1000) {
                    $normalized['...'] = 'Over 1000 items ('.count($data).' total), aborting normalization';
                    break;
                }

                $normalized[$key] = $this->normalize($value, $depth+1);
            }

            return $normalized;
        }

        if ($data instanceof \DateTime) {
            return $data->format($this->dateFormat);
        }

        if (is_object($data)) {
            // TODO 2.0 only check for Throwable
            if ($data instanceof Exception || (PHP_VERSION_ID > 70000 && $data instanceof \Throwable)) {
                return $this->normalizeException($data);
            }

            // non-serializable objects that implement __toString stringified
            if (method_exists($data, '__toString') && !$data instanceof \JsonSerializable) {
                $value = $data->__toString();
            } else {
                // the rest is json-serialized in some way
                $value = $this->toJson($data, true);
            }

            return sprintf("[object] (%s: %s)", Utils::getClass($data), $value);
        }

        if (is_resource($data)) {
            return sprintf('[resource] (%s)', get_resource_type($data));
        }

        return '[unknown('.gettype($data).')]';
    }

    protected function normalizeException($e)
    {
        // TODO 2.0 only check for Throwable
        if (!$e instanceof Exception && !$e instanceof \Throwable) {
            throw new \InvalidArgumentException('Exception/Throwable expected, got '.gettype($e).' / '.Utils::getClass($e));
        }

        $data = array(
            'class' => Utils::getClass($e),
            'message' => $e->getMessage(),
            'code' => (int) $e->getCode(),
            'file' => $e->getFile().':'.$e->getLine(),
        );

        if ($e instanceof \SoapFault) {
            if (isset($e->faultcode)) {
                $data['faultcode'] = $e->faultcode;
            }

            if (isset($e->faultactor)) {
                $data['faultactor'] = $e->faultactor;
            }

            if (isset($e->detail)) {
                if  (is_string($e->detail)) {
                    $data['detail'] = $e->detail;
                } elseif (is_object($e->detail) || is_array($e->detail)) {
                    $data['detail'] = $this->toJson($e->detail, true);
                }
            }
        }

        $trace = $e->getTrace();
        foreach ($trace as $frame) {
            if (isset($frame['file'])) {
                $data['trace'][] = $frame['file'].':'.$frame['line'];
            }
        }

        if ($previous = $e->getPrevious()) {
            $data['previous'] = $this->normalizeException($previous);
        }

        return $data;
    }

    /**
     * Return the JSON representation of a value
     *
     * @param  mixed             $data
     * @param  bool              $ignoreErrors
     * @throws \RuntimeException if encoding fails and errors are not ignored
     * @return string
     */
    protected function toJson($data, $ignoreErrors = false)
    {
        return Utils::jsonEncode($data, null, $ignoreErrors);
    }
}