<?php
namespace Qiniu\Pili;

class HttpResponse
{
    private $code;
    private $raw_body;
    private $body;
    private $headers;

    /**
     * @param int $code response code of the cURL request
     * @param string $raw_body the raw body of the cURL response
     * @param string $headers raw header string from cURL response
     */
    public function __construct($code, $raw_body, $headers)
    {
        $this->code     = $code;
        $this->headers  = $this->get_headers_from_curl_response($headers);
        $this->raw_body = $raw_body;
        $this->body     = $raw_body;
        $json           = json_decode($raw_body, true);
        if (json_last_error() == JSON_ERROR_NONE) {
            $this->body = $json;
        }
    }

    /**
     * Return a property of the response if it exists.
     * Possibilities include: code, raw_body, headers, body (if the response is json-decodable)
     * @return mixed
     */
    public function __get($property)
    {
        if (property_exists($this, $property)) {
            return $this->$property;
        }
    }

    /**
     * Set the properties of this object
     * @param string $property the property name
     * @param mixed $value the property value
     */
    public function __set($property, $value)
    {
        if (property_exists($this, $property)) {
            $this->$property = $value;
        }
        return $this;
    }

    /**
     * Retrieve the cURL response headers from the
     * header string and convert it into an array
     * @param  string $headers header string from cURL response
     * @return array
     */
    private function get_headers_from_curl_response($headers)
    {
        $headers = explode("\r\n", $headers);
        array_shift($headers);
        foreach ($headers as $line) {
            if (strstr($line, ': ')) {
                list($key, $value) = explode(': ', $line);
                $result[$key] = $value;
            }
        }
        return $result;
    }
}