<?php
namespace ScummVM;

use Smarty;
use ScummVM\Models\MenuModel;

/**
 * The Controller class will create an instance of the Smarty object configured
 * as specified in config.inc. Should be subclassed by all webpages so they can
 * take advantage of Smarty.
 */
class Controller
{
    private $smarty;
    private $css_files;
    private $js_files;

    /**
     * Constructor that will create a Smarty object and configure it according
     * to what's been specified in config.inc.
     */
    public function __construct()
    {
        /* Create a Smarty object. */
        $this->smarty = new Smarty();

        # Stick it globally so we could refer the translations
        global $Smarty;
        $Smarty = $this->smarty;

        global $lang;
        global $available_languages;

        /* Configure smarty. */
        $this->smarty->compile_dir = SMARTY_DIR_COMPILE;
        $this->smarty->cache_dir = SMARTY_DIR_CACHE;
        $this->smarty->config_dir = SMARTY_DIR_CONFIG;
        $this->smarty->caching = SMARTY_CACHING_ENABLE;
        $this->smarty->cache_lifetime = SMARTY_CACHING_LIFETIME;
        $this->smarty->compile_check = SMARTY_CACHING_COMPILE_CHECK;
        $this->smarty->force_compile = SMARTY_CACHING_FORCE_RECHECK;
        $this->smarty->template_dir = array("templates_$lang", 'templates');
        $this->smarty->compile_id = $lang;
        $this->smarty->config_dir = ".";

        # First we read English, so all defaults are there
        $this->smarty->configLoad(DIR_LANG . "/lang.en.ini");

        # Now we try to read translations
        if (is_file(($fname = DIR_LANG . "/lang.$lang.ini"))
            && is_readable($fname)) {
            $this->smarty->configLoad($fname);
        }

        setlocale(LC_TIME, $Smarty->getConfigVars('locale'));

        /**
         * Add a output-filter to make sure ampersands are properly encoded to
         * HTML-entities.
         */
        $this->smarty->registerFilter('output', array($this, 'outputFilter'));

        /* Give Smarty-template access to date(). */
        $this->smarty->registerPlugin('modifier', 'date_f', array(&$this, 'dateFormatSmartyModifier'));
        $this->smarty->registerPlugin('modifier', 'date_localized', array(&$this, 'dateLocalizedSmartyModifier'));

        /* Give Smarty-templates access to the ampersandEntity() function. */
        $this->smarty->registerPlugin(
            'modifier',
            'escapeAmpersand',
            array(&$this, 'ampersandEntity')
        );

        $this->css_files = array();
        $this->js_files = array();

        /* The menus have caused an exception, need to skip them. */
        if (!ExceptionHandler::skipMenus()) {
            $menus = MenuModel::getAllMenus();
        }

        # Construct lang URL
        $pageurl = preg_replace('/\?lang=[a-z]*$/', '', $_SERVER['REQUEST_URI']);

        /* Set up the common variables before displaying. */
        $vars = array(
            'release' => RELEASE,
            'baseurl' => URL_BASE,
            'heroes_num' => HEROES_NUM,
            'menus' => $menus,
            'pageurl' => $pageurl,
            'available_languages' => $available_languages,
        );
        $this->smarty->assign($vars);
    }

    /** Smarty outputfilter, run just before displaying. */
    public function outputFilter($string, $smarty)
    {
        /* Properly encode all ampersands as "&amp;". */
        $string = preg_replace('/&(?!([a-z]+|(#\d+));)/i', '&amp;', $string);
        /* Replace weird characters that appears in some of the data. */
        return $string;
    }

    /** Escape ampersands to the HTML-entitiy '&amp;'. */
    public static function ampersandEntity($string)
    {
        //return preg_replace('/&(?!amp|nbsp|lt|gt|quot;)/', '&amp;', $string);
        //return preg_replace('/&(?![a-z];|#[0-9];)/', '&amp;', $string);
        return $string;
    }

    /** Formating of dates, registered as a modifier for Smarty templates. */
    public function dateFormatSmartyModifier($timestamp, $format)
    {
        return date($format, $timestamp);
    }

    /** Formating of dateAs, registered as a modifier for Smarty templates. */
    public function dateLocalizedSmartyModifier($timestamp, $format)
    {
        if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN') {
            $format = preg_replace('#(?<!%)((?:%%)*)%e#', '\1%#d', $format);
        }
        return strftime($format, $timestamp);
    }

    /* Render the HTML using the template and any set variables and displays it. */
    public function display($content)
    {
        if (!is_string($content) || strlen($content) == 0) {
        }
        $vars = array(
            'css_files' => $this->css_files,
            'js_files' => $this->js_files,
            'content' => $content,
        );
        $this->smarty->assign($vars);
        return $this->smarty->display('pages/index.tpl');
    }

    /* Render the HTML using the template and any set variables and returns it. */
    public function fetch($template, $vars = null)
    {
        if (!is_file(SMARTY_DIR_TEMPLATE . "/{$template}")) {
        }
        if (!is_null($vars)) {
            $this->smarty->assign($vars);
        }
        return $this->smarty->fetch($template);
    }

    /* Set up the variables used by the template and render the page. */
    public function renderPage($vars, $template)
    {
        if (!is_string($template)) {
        }
        return $this->display($this->fetch($template, $vars));
    }

    /* Assign extra CSS files needed by the different pages/templates. */
    public function addCSSFiles($extra_css)
    {
        if (is_array($extra_css)) {
            $this->css_files = array_merge(
                $this->css_files,
                $extra_css
            );
        } elseif (is_string($extra_css) && strlen($extra_css) > 0) {
            $this->css_files[] = $extra_css;
        }
    }

    /* Assign javascripts files needed by the different pages/templates. */
    public function addJSFiles($extra_js)
    {
        if (is_array($extra_js)) {
            $this->js_files = array_merge(
                $this->js_files,
                $extra_js
            );
        } elseif (is_string($extra_js) && strlen($extra_js) > 0) {
            $this->js_files[] = $extra_js;
        }
    }
}