<?php

namespace Illuminate\Http;

use Closure;
use ArrayAccess;
use SplFileInfo;
use RuntimeException;
use Illuminate\Support\Arr;
use Illuminate\Support\Str;
use Symfony\Component\HttpFoundation\ParameterBag;
use Symfony\Component\HttpFoundation\Request as SymfonyRequest;

class Request extends SymfonyRequest implements ArrayAccess
{
    /**
     * The decoded JSON content for the request.
     *
     * @var string
     */
    protected $json;

    /**
     * The user resolver callback.
     *
     * @var \Closure
     */
    protected $userResolver;

    /**
     * The route resolver callback.
     *
     * @var \Closure
     */
    protected $routeResolver;

    /**
     * Create a new Illuminate HTTP request from server variables.
     *
     * @return static
     */
    public static function capture()
    {
        static::enableHttpMethodParameterOverride();

        return static::createFromBase(SymfonyRequest::createFromGlobals());
    }

    /**
     * Return the Request instance.
     *
     * @return $this
     */
    public function instance()
    {
        return $this;
    }

    /**
     * Get the request method.
     *
     * @return string
     */
    public function method()
    {
        return $this->getMethod();
    }

    /**
     * Get the root URL for the application.
     *
     * @return string
     */
    public function root()
    {
        return rtrim($this->getSchemeAndHttpHost().$this->getBaseUrl(), '/');
    }

    /**
     * Get the URL (no query string) for the request.
     *
     * @return string
     */
    public function url()
    {
        return rtrim(preg_replace('/\?.*/', '', $this->getUri()), '/');
    }

    /**
     * Get the full URL for the request.
     *
     * @return string
     */
    public function fullUrl()
    {
        $query = $this->getQueryString();

        return $query ? $this->url().'?'.$query : $this->url();
    }

    /**
     * Get the current path info for the request.
     *
     * @return string
     */
    public function path()
    {
        $pattern = trim($this->getPathInfo(), '/');

        return $pattern == '' ? '/' : $pattern;
    }

    /**
     * Get the current encoded path info for the request.
     *
     * @return string
     */
    public function decodedPath()
    {
        return rawurldecode($this->path());
    }

    /**
     * Get a segment from the URI (1 based index).
     *
     * @param  int  $index
     * @param  string|null  $default
     * @return string|null
     */
    public function segment($index, $default = null)
    {
        return Arr::get($this->segments(), $index - 1, $default);
    }

    /**
     * Get all of the segments for the request path.
     *
     * @return array
     */
    public function segments()
    {
        $segments = explode('/', $this->path());

        return array_values(array_filter($segments, function ($v) {
            return $v != '';
        }));
    }

    /**
     * Determine if the current request URI matches a pattern.
     *
     * @param  mixed  string
     * @return bool
     */
    public function is()
    {
        foreach (func_get_args() as $pattern) {
            if (Str::is($pattern, urldecode($this->path()))) {
                return true;
            }
        }

        return false;
    }

    /**
     * Determine if the request is the result of an AJAX call.
     *
     * @return bool
     */
    public function ajax()
    {
        return $this->isXmlHttpRequest();
    }

    /**
     * Determine if the request is the result of an PJAX call.
     *
     * @return bool
     */
    public function pjax()
    {
        return $this->headers->get('X-PJAX') == true;
    }

    /**
     * Determine if the request is over HTTPS.
     *
     * @return bool
     */
    public function secure()
    {
        return $this->isSecure();
    }

    /**
     * Returns the client IP address.
     *
     * @return string
     */
    public function ip()
    {
        return $this->getClientIp();
    }

    /**
     * Returns the client IP addresses.
     *
     * @return array
     */
    public function ips()
    {
        return $this->getClientIps();
    }

    /**
     * Determine if the request contains a given input item key.
     *
     * @param  string|array  $key
     * @return bool
     */
    public function exists($key)
    {
        $keys = is_array($key) ? $key : func_get_args();

        $input = $this->all();

        foreach ($keys as $value) {
            if (! array_key_exists($value, $input)) {
                return false;
            }
        }

        return true;
    }

    /**
     * Determine if the request contains a non-empty value for an input item.
     *
     * @param  string|array  $key
     * @return bool
     */
    public function has($key)
    {
        $keys = is_array($key) ? $key : func_get_args();

        foreach ($keys as $value) {
            if ($this->isEmptyString($value)) {
                return false;
            }
        }

        return true;
    }

    /**
     * Determine if the given input key is an empty string for "has".
     *
     * @param  string  $key
     * @return bool
     */
    protected function isEmptyString($key)
    {
        $value = $this->input($key);

        $boolOrArray = is_bool($value) || is_array($value);

        return ! $boolOrArray && trim((string) $value) === '';
    }

    /**
     * Get all of the input and files for the request.
     *
     * @return array
     */
    public function all()
    {
        return array_replace_recursive($this->input(), $this->files->all());
    }

    /**
     * Retrieve an input item from the request.
     *
     * @param  string  $key
     * @param  string|array|null  $default
     * @return string|array
     */
    public function input($key = null, $default = null)
    {
        $input = $this->getInputSource()->all() + $this->query->all();

        return Arr::get($input, $key, $default);
    }

    /**
     * Get a subset of the items from the input data.
     *
     * @param  array  $keys
     * @return array
     */
    public function only($keys)
    {
        $keys = is_array($keys) ? $keys : func_get_args();

        $results = [];

        $input = $this->all();

        foreach ($keys as $key) {
            Arr::set($results, $key, Arr::get($input, $key));
        }

        return $results;
    }

    /**
     * Get all of the input except for a specified array of items.
     *
     * @param  array|mixed  $keys
     * @return array
     */
    public function except($keys)
    {
        $keys = is_array($keys) ? $keys : func_get_args();

        $results = $this->all();

        Arr::forget($results, $keys);

        return $results;
    }

    /**
     * Retrieve a query string item from the request.
     *
     * @param  string  $key
     * @param  string|array|null  $default
     * @return string|array
     */
    public function query($key = null, $default = null)
    {
        return $this->retrieveItem('query', $key, $default);
    }

    /**
     * Determine if a cookie is set on the request.
     *
     * @param  string  $key
     * @return bool
     */
    public function hasCookie($key)
    {
        return ! is_null($this->cookie($key));
    }

    /**
     * Retrieve a cookie from the request.
     *
     * @param  string  $key
     * @param  string|array|null  $default
     * @return string|array
     */
    public function cookie($key = null, $default = null)
    {
        return $this->retrieveItem('cookies', $key, $default);
    }

    /**
     * Retrieve a file from the request.
     *
     * @param  string  $key
     * @param  mixed  $default
     * @return \Symfony\Component\HttpFoundation\File\UploadedFile|array|null
     */
    public function file($key = null, $default = null)
    {
        return Arr::get($this->files->all(), $key, $default);
    }

    /**
     * Determine if the uploaded data contains a file.
     *
     * @param  string  $key
     * @return bool
     */
    public function hasFile($key)
    {
        if (! is_array($files = $this->file($key))) {
            $files = [$files];
        }

        foreach ($files as $file) {
            if ($this->isValidFile($file)) {
                return true;
            }
        }

        return false;
    }

    /**
     * Check that the given file is a valid file instance.
     *
     * @param  mixed  $file
     * @return bool
     */
    protected function isValidFile($file)
    {
        return $file instanceof SplFileInfo && $file->getPath() != '';
    }

    /**
     * Retrieve a header from the request.
     *
     * @param  string  $key
     * @param  string|array|null  $default
     * @return string|array
     */
    public function header($key = null, $default = null)
    {
        return $this->retrieveItem('headers', $key, $default);
    }

    /**
     * Retrieve a server variable from the request.
     *
     * @param  string  $key
     * @param  string|array|null  $default
     * @return string|array
     */
    public function server($key = null, $default = null)
    {
        return $this->retrieveItem('server', $key, $default);
    }

    /**
     * Retrieve an old input item.
     *
     * @param  string  $key
     * @param  string|array|null  $default
     * @return string|array
     */
    public function old($key = null, $default = null)
    {
        return $this->session()->getOldInput($key, $default);
    }

    /**
     * Flash the input for the current request to the session.
     *
     * @param  string  $filter
     * @param  array   $keys
     * @return void
     */
    public function flash($filter = null, $keys = [])
    {
        $flash = (! is_null($filter)) ? $this->$filter($keys) : $this->input();

        $this->session()->flashInput($flash);
    }

    /**
     * Flash only some of the input to the session.
     *
     * @param  array|mixed  $keys
     * @return void
     */
    public function flashOnly($keys)
    {
        $keys = is_array($keys) ? $keys : func_get_args();

        return $this->flash('only', $keys);
    }

    /**
     * Flash only some of the input to the session.
     *
     * @param  array|mixed  $keys
     * @return void
     */
    public function flashExcept($keys)
    {
        $keys = is_array($keys) ? $keys : func_get_args();

        return $this->flash('except', $keys);
    }

    /**
     * Flush all of the old input from the session.
     *
     * @return void
     */
    public function flush()
    {
        $this->session()->flashInput([]);
    }

    /**
     * Retrieve a parameter item from a given source.
     *
     * @param  string  $source
     * @param  string  $key
     * @param  string|array|null  $default
     * @return string|array
     */
    protected function retrieveItem($source, $key, $default)
    {
        if (is_null($key)) {
            return $this->$source->all();
        }

        return $this->$source->get($key, $default, true);
    }

    /**
     * Merge new input into the current request's input array.
     *
     * @param  array  $input
     * @return void
     */
    public function merge(array $input)
    {
        $this->getInputSource()->add($input);
    }

    /**
     * Replace the input for the current request.
     *
     * @param  array  $input
     * @return void
     */
    public function replace(array $input)
    {
        $this->getInputSource()->replace($input);
    }

    /**
     * Get the JSON payload for the request.
     *
     * @param  string  $key
     * @param  mixed   $default
     * @return mixed
     */
    public function json($key = null, $default = null)
    {
        if (! isset($this->json)) {
            $this->json = new ParameterBag((array) json_decode($this->getContent(), true));
        }

        if (is_null($key)) {
            return $this->json;
        }

        return Arr::get($this->json->all(), $key, $default);
    }

    /**
     * Get the input source for the request.
     *
     * @return \Symfony\Component\HttpFoundation\ParameterBag
     */
    protected function getInputSource()
    {
        if ($this->isJson()) {
            return $this->json();
        }

        return $this->getRealMethod() == 'GET' ? $this->query : $this->request;
    }

    /**
     * Determine if the given content types match.
     *
     * @param  string  $actual
     * @param  string  $type
     * @return bool
     */
    public static function matchesType($actual, $type)
    {
        if ($actual === $type) {
            return true;
        }

        $split = explode('/', $actual);

        return isset($split[1]) && preg_match('#'.preg_quote($split[0], '#').'/.+\+'.preg_quote($split[1], '#').'#', $type);
    }

    /**
     * Determine if the request is sending JSON.
     *
     * @return bool
     */
    public function isJson()
    {
        return Str::contains($this->header('CONTENT_TYPE'), ['/json', '+json']);
    }

    /**
     * Determine if the current request is asking for JSON in return.
     *
     * @return bool
     */
    public function wantsJson()
    {
        $acceptable = $this->getAcceptableContentTypes();

        return isset($acceptable[0]) && Str::contains($acceptable[0], ['/json', '+json']);
    }

    /**
     * Determines whether the current requests accepts a given content type.
     *
     * @param  string|array  $contentTypes
     * @return bool
     */
    public function accepts($contentTypes)
    {
        $accepts = $this->getAcceptableContentTypes();

        if (count($accepts) === 0) {
            return true;
        }

        $types = (array) $contentTypes;

        foreach ($accepts as $accept) {
            if ($accept === '*/*' || $accept === '*') {
                return true;
            }

            foreach ($types as $type) {
                if ($this->matchesType($accept, $type) || $accept === strtok($type, '/').'/*') {
                    return true;
                }
            }
        }

        return false;
    }

    /**
     * Return the most suitable content type from the given array based on content negotiation.
     *
     * @param  string|array  $contentTypes
     * @return string|null
     */
    public function prefers($contentTypes)
    {
        $accepts = $this->getAcceptableContentTypes();

        $contentTypes = (array) $contentTypes;

        foreach ($accepts as $accept) {
            if (in_array($accept, ['*/*', '*'])) {
                return $contentTypes[0];
            }

            foreach ($contentTypes as $contentType) {
                $type = $contentType;

                if (! is_null($mimeType = $this->getMimeType($contentType))) {
                    $type = $mimeType;
                }

                if ($this->matchesType($type, $accept) || $accept === strtok($type, '/').'/*') {
                    return $contentType;
                }
            }
        }
    }

    /**
     * Determines whether a request accepts JSON.
     *
     * @return bool
     */
    public function acceptsJson()
    {
        return $this->accepts('application/json');
    }

    /**
     * Determines whether a request accepts HTML.
     *
     * @return bool
     */
    public function acceptsHtml()
    {
        return $this->accepts('text/html');
    }

    /**
     * Get the data format expected in the response.
     *
     * @param  string  $default
     * @return string
     */
    public function format($default = 'html')
    {
        foreach ($this->getAcceptableContentTypes() as $type) {
            if ($format = $this->getFormat($type)) {
                return $format;
            }
        }

        return $default;
    }

    /**
     * Create an Illuminate request from a Symfony instance.
     *
     * @param  \Symfony\Component\HttpFoundation\Request  $request
     * @return \Illuminate\Http\Request
     */
    public static function createFromBase(SymfonyRequest $request)
    {
        if ($request instanceof static) {
            return $request;
        }

        $content = $request->content;

        $request = (new static)->duplicate(

            $request->query->all(), $request->request->all(), $request->attributes->all(),

            $request->cookies->all(), $request->files->all(), $request->server->all()
        );

        $request->content = $content;

        $request->request = $request->getInputSource();

        return $request;
    }

    /**
     * {@inheritdoc}
     */
    public function duplicate(array $query = null, array $request = null, array $attributes = null, array $cookies = null, array $files = null, array $server = null)
    {
        return parent::duplicate($query, $request, $attributes, $cookies, array_filter((array) $files), $server);
    }

    /**
     * Get the session associated with the request.
     *
     * @return \Illuminate\Session\Store
     *
     * @throws \RuntimeException
     */
    public function session()
    {
        if (! $this->hasSession()) {
            throw new RuntimeException('Session store not set on request.');
        }

        return $this->getSession();
    }

    /**
     * Get the user making the request.
     *
     * @return mixed
     */
    public function user()
    {
        return call_user_func($this->getUserResolver());
    }

    /**
     * Get the route handling the request.
     *
     * @param string|null $param
     *
     * @return \Illuminate\Routing\Route|object|string
     */
    public function route($param = null)
    {
        $route = call_user_func($this->getRouteResolver());

        if (is_null($route) || is_null($param)) {
            return $route;
        } else {
            return $route->parameter($param);
        }
    }

    /**
     * Get the user resolver callback.
     *
     * @return \Closure
     */
    public function getUserResolver()
    {
        return $this->userResolver ?: function () {
            //
        };
    }

    /**
     * Set the user resolver callback.
     *
     * @param  \Closure  $callback
     * @return $this
     */
    public function setUserResolver(Closure $callback)
    {
        $this->userResolver = $callback;

        return $this;
    }

    /**
     * Get the route resolver callback.
     *
     * @return \Closure
     */
    public function getRouteResolver()
    {
        return $this->routeResolver ?: function () {
            //
        };
    }

    /**
     * Set the route resolver callback.
     *
     * @param  \Closure  $callback
     * @return $this
     */
    public function setRouteResolver(Closure $callback)
    {
        $this->routeResolver = $callback;

        return $this;
    }

    /**
     * Determine if the given offset exists.
     *
     * @param  string  $offset
     * @return bool
     */
    public function offsetExists($offset)
    {
        return array_key_exists($offset, $this->all());
    }

    /**
     * Get the value at the given offset.
     *
     * @param  string  $offset
     * @return mixed
     */
    public function offsetGet($offset)
    {
        return Arr::get($this->all(), $offset);
    }

    /**
     * Set the value at the given offset.
     *
     * @param  string  $offset
     * @param  mixed  $value
     * @return void
     */
    public function offsetSet($offset, $value)
    {
        return $this->getInputSource()->set($offset, $value);
    }

    /**
     * Remove the value at the given offset.
     *
     * @param  string  $offset
     * @return void
     */
    public function offsetUnset($offset)
    {
        return $this->getInputSource()->remove($offset);
    }

    /**
     * Check if an input element is set on the request.
     *
     * @param  string  $key
     * @return bool
     */
    public function __isset($key)
    {
        return ! is_null($this->__get($key));
    }

    /**
     * Get an input element from the request.
     *
     * @param  string  $key
     * @return mixed
     */
    public function __get($key)
    {
        $all = $this->all();

        if (array_key_exists($key, $all)) {
            return $all[$key];
        } else {
            return $this->route($key);
        }
    }
}
