<?php

/*
 * This file is part of the Liip/ThemeBundle
 *
 * (c) Liip AG
 *
 * This source file is subject to the MIT license that is bundled
 * with this source code in the file LICENSE.
 */

namespace Liip\ThemeBundle\Helper;

class DeviceDetection implements DeviceDetectionInterface
{
    protected $userAgent;
    protected $devices = array(
        "tablet" => array(
            "androidtablet" => "android(?!.*(?:mobile|opera mobi|opera mini))",
            "blackberrytablet" => "rim tablet os",
            "ipad" => "(ipad)"
        ),
        "plain" => array(
            "kindle" => "(kindle)",
            "IE6" => "MSIE 6.0"
        ),
        "phone" => array(
            "android" => "android.*mobile|android.*opera mobi|android.*opera mini",
            "blackberry" => "blackberry",
            "iphone" => "(iphone|ipod)",
            "palm" => "(avantgo|blazer|elaine|hiptop|palm|plucker|xiino|webOS)",
            "windows" => "windows ce; (iemobile|ppc|smartphone)",
            "windowsphone" => "windows phone",
            "generic" => "(mobile|mmp|midp|o2|pda|pocket|psp|symbian|smartphone|treo|up.browser|up.link|vodafone|wap|opera mini|opera mobi|opera mini)",
        ),
        "desktop" => array(
            "osx" => "Mac OS X",
            "linux" => "Linux",
            "windows" => "Windows",
            "generic" => "",
        )
    );

    protected $type = null;
    protected $device = null;

    public function __construct($userAgent = null)
    {
        $this->setUserAgent($userAgent);
    }

    public function setUserAgent($userAgent)
    {
        $this->userAgent = $userAgent;
    }

    public function setDevices($devices)
    {
        $this->devices = $devices;
    }

    protected function init()
    {
        if (null === $this->type || null === $this->device) {
            list($device, $type) = $this->determineDevice($this->userAgent);
            $this->device = $device;
            $this->type = $type;
        }
    }

    /**
     * Overloads isAndroid() | isAndroidtablet() | isIphone() | isIpad() | isBlackberry() | isBlackberrytablet() | isPalm() | isWindowsphone() | isWindows() | isGeneric() through isDevice()
     *
     * @param string $name
     * @param array $arguments
     * @return bool
     */
    public function __call($name, $arguments)
    {
        $isDevice = substr($name, 2);
        if ($name !== "is" . ucfirst($isDevice)) {
            trigger_error("Method $name not defined", E_USER_WARNING);
        }

        $device = $this->device;
        if (null === $device) {
            if (empty($arguments['userAgent'])) {
                $this->init();
                $device = $this->device;
            } else {
                list($device, $type) = $this->determineDevice($arguments['userAgent']);
            }
        }

        return strtolower($isDevice) === $device;
    }

    /**
     * Returns true if any type of mobile device detected, including special ones
     * 
     * @param string $userAgent optional to override the default user agent
     * 
     * @return bool
     */
    public function isPhone($userAgent = null)
    {
        if (null === $userAgent) {
            $this->init();
            $type = $this->type;
        } else {
            list($device, $type) = $this->determineDevice($userAgent);
        }

        return $type === 'phone';
    }

    /**
     * Returns true if any type of tablet device detected, including special ones
     *
     * @param string $userAgent optional to override the default user agent
     *
     * @return bool
     */
    public function isTablet($userAgent = null)
    {
        if (null === $userAgent) {
            $this->init();
            $type = $this->type;
        } else {
            list($device, $type) = $this->determineDevice($userAgent);
        }

        return $type === 'tablet';
    }

    /**
     * Returns true if any type of desktop device detected, including special ones
     *
     * @param string $userAgent optional to override the default user agent
     *
     * @return bool
     */
    public function isDesktop($userAgent = null)
    {
        if (null === $userAgent) {
            $this->init();
            $type = $this->type;
        } else {
            list($device, $type) = $this->determineDevice($userAgent);
        }

        return $type === 'desktop';
    }

    public function determineDevice($userAgent)
    {
        foreach ($this->devices as $type => $devices) {
            foreach ($devices as $device => $regexp) {
                if ((bool) preg_match("/" . $regexp . "/i", $userAgent)) {
                    return array($device, $type);
                }
            }
        }

        return array(null, null);
    }

    public function getType()
    {
        $this->init();
        return $this->type;
    }

    /**
     * Force device type
     *
     * @param string $type
     */
    public function setType($type)
    {
        if (in_array($type, array_keys($this->devices))) {
            $this->type = $type;
        }
    }

    public function getDevice()
    {
        $this->init();
        return $this->device;
    }
}