<?php

namespace Trinity\Bundle\ContentManagerBundle\Page;

use Trinity\Bundle\ContentManagerBundle\Model\Nav;
use Trinity\Bundle\ContentManagerBundle\Navigation\NavigationInterface;
use \Trinity\Bundle\ContentManagerBundle\Model\Node;
use \Trinity\Bundle\ContentManagerBundle\Block\BlockManager;
use \Trinity\Bundle\ContentManagerBundle\Model\SeoPageInterface;
use \Trinity\Bundle\ContentManagerBundle\Exception\NodeNotFoundException;
use \Trinity\Bundle\ContentManagerBundle\Exception\PageNotFoundException;

class PageManager implements PageManagerInterface
{
    protected $navigation;
    protected $blockManager;

    public $current_page = null;
    public $current_node = null;

    public $menus = null;

    public function __construct(BlockManager $blockManager)
    {
        $this->blockManager = $blockManager;
    }

    public function getCurrentPage()
    {
        return $this->current_page;
    }

    public function changeCurrentPage()
    {
        if (!$this->current_node) {
            throw new NodeNotFoundException('Check the decorator_strategy configuration otherwise create a new node to support this path.');
        }

        $page = $this->current_node->getPage();

        if ($this->current_node->isHybrid() && !$page) {
            return;
        }

        if (!$page) {
            throw new PageNotFoundException(sprintf('You must create a page for the node named : "%s"',$this->current_node->getTitle()));
        }

        $this->setCurrentPage($page);
        $this->loadBlocks();
    }

    public function setNavigation(NavigationInterface $nav)
    {
        $this->navigation = $nav;
    }

    public function setCurrentPage(SeoPageInterface $page)
    {
        $this->current_page = $page;
    }

    public function setCurrentNode(Node $node)
    {
        $this->current_node = $node;
    }

    public function getPage()
    {
        return $this->current_page;
    }

    /**
     * @return null | Node
     */
    public function getCurrentNode()
    {
        return $this->current_node;
    }

    public function getMenu($menu_name)
    {
        if (null === $this->menus) {
            $this->loadMenus();
        }

        return $this->menus[$menu_name];
    }

    public function loadBlocks()
    {
        $this->blockManager->loadPageBlocks($this->current_page);
    }

    public function loadMenus()
    {
        $menus = $this->navigation->getMenus();

        foreach ($menus as $menu) {
            $menu->loadVisibleNodes();
            $this->menus[$menu->getName()] = $menu;
        }
    }
}