<?php
// {{{ICINGA_LICENSE_HEADER}}}
// {{{ICINGA_LICENSE_HEADER}}}

namespace Icinga\Web\Widget\Dashboard;

use Zend_Form_Element_Button;
use Icinga\Application\Config;
use Icinga\Web\Form;
use Icinga\Web\Url;
use Icinga\Web\Widget\AbstractWidget;
use Icinga\Exception\IcingaException;

/**
 * A dashboard pane component
 *
 * This is the element displaying a specific view in icinga2web
 *
 */
class Component extends AbstractWidget
{
    /**
     * The url of this Component
     *
     * @var \Icinga\Web\Url
     */
    private $url;

    /**
     * The title being displayed on top of the component
     * @var
     */
    private $title;

    /**
     * The pane containing this component, needed for the 'remove button'
     * @var Pane
     */
    private $pane;

    /**
     * The disabled option is used to "delete" default dashlets provided by modules
     *
     * @var bool
     */
    private $disabled = false;

    /**
     * The template string used for rendering this widget
     *
     * @var string
     */
    private $template =<<<'EOD'

    <div class="container" data-icinga-url="{URL}">
        <h1>{REMOVE}<a href="{FULL_URL}" data-base-target="col1">{TITLE}</a></h1>
        <noscript>
            <iframe src="{IFRAME_URL}" style="height:100%; width:99%" frameborder="no"></iframe>
        </noscript>
    </div>
EOD;

    /**
     * Create a new component displaying the given url in the provided pane
     *
     * @param string $title     The title to use for this component
     * @param Url|string $url   The url this component uses for displaying information
     * @param Pane $pane        The pane this Component will be added to
     */
    public function __construct($title, $url, Pane $pane)
    {
        $this->title = $title;
        $this->pane = $pane;
        if ($url instanceof Url) {
            $this->url = $url;
        } elseif ($url) {
            $this->url = Url::fromPath($url);
        } else {
            throw new IcingaException(
                'Cannot create dashboard component "%s" without valid URL',
                $title
            );
        }
    }

    /**
     * Retrieve the components title
     *
     * @return string
     */
    public function getTitle()
    {
        return $this->title;
    }

    /**
     * Retrieve the components url
     *
     * @return Url
     */
    public function getUrl()
    {
        return $this->url;
    }

    /**
     * Set the components URL
     *
     * @param  string|Url $url  The url to use, either as an Url object or as a path
     *
     * @return self
     */
    public function setUrl($url)
    {
        if ($url instanceof Url) {
            $this->url = $url;
        } else {
            $this->url = Url::fromPath($url);
        }
        return $this;
    }

    /**
     * Set the disabled property
     *
     * @param boolean $disabled
     */
    public function setDisabled($disabled)
    {
        $this->disabled = $disabled;
    }

    /**
     * Get the disabled property
     *
     * @return boolean
     */
    public function getDisabled()
    {
        return $this->disabled;
    }

    /**
     * Return this component's structure as array
     *
     * @return  array
     */
    public function toArray()
    {
        $array = array('url' => $this->url->getPath());
        foreach ($this->url->getParams()->toArray() as $param) {
            $array[$param[0]] = $param[1];
        }
        return $array;
    }

    /**
     * @see Widget::render()
     */
    public function render()
    {
        if ($this->disabled === true) {
            return '';
        }

        $view = $this->view();
        $url = clone($this->url);
        $url->setParam('view', 'compact');
        $iframeUrl = clone($url);
        $iframeUrl->setParam('isIframe');

        $html = str_replace('{URL}', $url, $this->template);
        $html = str_replace('{IFRAME_URL}', $iframeUrl, $html);
        $html = str_replace('{FULL_URL}', $url->getUrlWithout(array('view', 'limit')), $html);
        $html = str_replace('{REMOVE_BTN}', $this->getRemoveForm($view), $html);
        $html = str_replace('{TITLE}', $view->escape($this->getTitle()), $html);
        $html = str_replace('{REMOVE}', $this->getRemoveForm(), $html);
        return $html;
    }

    /**
     * Render the form for removing a dashboard elemetn
     *
     * @return string                       The html representation of the form
     */
    protected function getRemoveForm()
    {
        // TODO: temporarily disabled, should point to a form asking for confirmal
        return '';
        $removeUrl = Url::fromPath(
            '/dashboard/removecomponent',
            array(
                'pane' => $this->pane->getName(),
                'component' => $this->getTitle()
            )
        );
        $form = new Form();
        $form->setMethod('POST');
        $form->setAttrib('class', 'inline');
        $form->setAction($removeUrl);
        $form->addElement(
            new Zend_Form_Element_Button(
                'remove_pane_btn',
                array(
                    'class'=> 'link-like pull-right',
                    'type' => 'submit',
                    'label' => 'x'
                )
            )
        );
        return $form;
    }

    /**
     * Create a @see Component instance from the given Zend config, using the provided title
     *
     * @param $title            The title for this component
     * @param Config $config    The configuration defining url, parameters, height, width, etc.
     * @param Pane $pane        The pane this component belongs to
     *
     * @return Component        A newly created Component for use in the Dashboard
     */
    public static function fromIni($title, Config $config, Pane $pane)
    {
        $height = null;
        $width = null;
        $url = $config->get('url');
        $parameters = $config->toArray();
        unset($parameters['url']); // otherwise there's an url = parameter in the Url

        $cmp = new Component($title, Url::fromPath($url, $parameters), $pane);
        return $cmp;
    }
}
