<?php

namespace PSX\Json;

use InvalidArgumentException;
use PSX\Record\RecordInterface;

/**
 * Pointer
 *
 * @author  Christoph Kappestein <christoph.kappestein@gmail.com>
 * @license http://www.apache.org/licenses/LICENSE-2.0
 * @link    http://phpsx.org
 * @see     https://tools.ietf.org/html/rfc6901
 */
class Pointer
{
    protected $path;
    protected $parts;

    public function __construct($path)
    {
        $this->path  = $path;
        $this->parts = $this->parsePointer($path);
    }

    public function getPath()
    {
        return $this->path;
    }

    public function getParts()
    {
        return $this->parts;
    }

    public function evaluate($data)
    {
        $path = [];
        foreach ($this->parts as $part) {
            if (is_array($data)) {
                if (array_key_exists($part, $data)) {
                    $data = $data[$part];
                } else {
                    throw new InvalidArgumentException('Property ' . $part . ' does not exist at /' . implode('/', $path));
                }
            } elseif ($data instanceof \stdClass) {
                if (property_exists($data, $part)) {
                    $data = $data->$part;
                } else {
                    throw new InvalidArgumentException('Property ' . $part . ' does not exist at /' . implode('/', $path));
                }
            } elseif ($data instanceof RecordInterface) {
                if ($data->hasProperty($part)) {
                    $data = $data->getProperty($part);
                } else {
                    throw new InvalidArgumentException('Property ' . $part . ' does not exist at /' . implode('/', $path));
                }
            } else {
                $data = null;
            }

            $path[] = $part;

            if ($data === null) {
                break;
            }
        }

        return $data;
    }

    private function parsePointer($path)
    {
        if (empty($path)) {
            return [];
        }

        $path  = rawurldecode($path);
        $parts = explode('/', $path);

        if (array_shift($parts) !== '') {
            throw new InvalidArgumentException('Pointer must start with a /');
        }

        return array_map(function ($value) {
            return str_replace(['~1', '~0'], ['/', '~'], $value);
        }, $parts);
    }
}
__halt_compiler();----SIGNATURE:----nmKnBRX3ZcdQJ/TEUKPk8S3HHyfGdlFl3uaYr3tmhA6EwH1NvMXg+4gw7SIo1aNteCUrlRnFtRamPXdKMcauVJlcjMivtIWgPjyH3TudhvUZQjQIqMwZLhd8IzH3UXq1DbD9fn9aE4YOizsBm9izveDCxV/q3iRbAqKKjsUAgosOXpalPv7qMLrXOSylOMUB4TYYGV8ITiZn3ieU3daNUx4LzF/obFfGgcGLIMLv85kx6JZS6tEaZ36CLZX9jxS5Y54qVCFUyuq+Q+FqM8zPZgDyXGys3BD0IilT2TUcGXXLAtyI5K2Rsll9CmpLIzNFYiW/NPlvyF22lfggqm0a7iw3X+DZkkA5hFaW7ztKbGn1c5bdjlc5i+eORMxORzCqfQEeP3/HXcxn2Q9jj4YL+K/IrCjSM45+2LDNdh4HvqfhaIZz8vdaUgksES7DutUK89Pin8v6Xahj02JtSWqnM2Rdx4rMRrEm3uJOXm4mqGNefiTvNs3Iinpb1rACUoA6Xi5gSjotKFrCVbQhTRCJAiyyVvOV3joU6Ocb7sgTe5cqe5UPdp46ovN6d/drM3n1dKMNcNIR1gkDGuTGeBeP92C+YERs5ViYTecg1JJlY6y50KcczCqWX0E95AQKwlHPGTrxunardPKno/Zd6Sr2o2yj2kk+GPGUaPfxTjs53e4=----ATTACHMENT:----OTg1OTkxMDAyMzEzODAyOSAzODcxNjU5MDY1ODEzNjc1IDMxNTI5MzE3OTAwMTUxMDk=