<?php

namespace Catalyst\MenuBundle\Service;

use Symfony\Component\Routing\Exception\RouteNotFoundException;
use Symfony\Component\Yaml\Parser as YamlParser;
use Symfony\Component\Config\ConfigCache;
use Symfony\Component\Config\Resource\FileResource;
use Symfony\Component\Routing\RouterInterface;

use Catalyst\MenuBundle\Menu\Collection;
use Catalyst\MenuBundle\Menu\Item;


class Generator
{
    protected $index;
    protected $menu;

    protected $router;
    protected $menu_data;

    public function __construct(RouterInterface $router, $menu_data)
    {
        $this->index = new Collection();
        $this->menu = new Collection();
        $this->router = $router;
        $this->menu_data = $this->processConfigs($menu_data);
    }

    public function getMenu($menu_key)
    {
        if (!isset($this->menu_data[$menu_key]))
            return null;

        return $this->menu_data[$menu_key];
    }

    protected function processConfigs($data)
    {
        $pdata = [];

        error_log(print_r($data, true));

        // first layer contains all the instances in config
        foreach ($data as $instance_data)
        {
            // 2nd layer are the groups and the parents
            foreach ($instance_data as $group => $group_data)
            {
				// initialize group data
                if (!isset($pdata[$group]))
				{
                    $pdata[$group] = [
                        'menu' => new Collection(),
                        'index' => new Collection(),
                    ];
                }

                $index = $pdata[$group]['index'];
                $menu = $pdata[$group]['menu'];

                foreach ($group_data as $mi_data)
                {
                    // check params
                    if (!isset($mi_data['icon']))
                        $mi_data['icon'] = null;

                    // instantiate
                    $mi = $this->newItem($index, $mi_data['id'], $mi_data['label'], $mi_data['icon']);

                    // acl
                    if (isset($mi_data['acl']))
                        $mi->setACLKey($mi_data['acl']);

                    // check parent
                    if (isset($mi_data['parent']) && $mi_data['parent'] != null)
                    {
                        $parent = $index->get($mi_data['parent']);
                        if ($parent == null)
                            continue;

                        $parent->addChild($mi);
                    }
                    else
                        $menu->add($mi);
                }
            }
        }

        error_log(print_r($pdata, true));

        return $pdata;
    }

    protected function newItem($index, $id, $label, $icon = null)
    {
        $mi = new Item();
        $mi->setID($id)
            ->setLabel($label);

        // TODO: have a way to set manual links or specify route parameters
        try
        {
            $mi->setLink($this->router->generate($id));
        }
        catch (RouteNotFoundException $e)
        {
            // no route, set to #
            $mi->setLink('javascript:;');
        }

        if ($icon != null)
            $mi->setIcon($icon);

        $index->add($mi);

        return $mi;
    }
}