<?php
/**
 * Copyright © Magefan (support@magefan.com). All rights reserved.
 * See LICENSE.txt for license details (http://opensource.org/licenses/osl-3.0.php).
 *
 * Glory to Ukraine! Glory to the heroes!
 */

namespace Magefan\Blog\Block;

use Magento\Framework\Api\SortOrder;
use Magento\Store\Model\ScopeInterface;
use Magefan\Blog\Model\Config\Source\PostsSortBy;

/**
 * Blog index block
 */
class Index extends \Magefan\Blog\Block\Post\PostList
{
    /**
     * Preparing global layout
     *
     * @return $this
     */
    protected function _prepareLayout()
    {
        $this->_addBreadcrumbs();
        $this->pageConfig->getTitle()->set($this->_getConfigValue('title'));
        $this->pageConfig->setKeywords($this->_getConfigValue('meta_keywords'));
        $this->pageConfig->setDescription($this->_getConfigValue('meta_description'));

        if ($this->config->getDisplayCanonicalTag(\Magefan\Blog\Model\Config::CANONICAL_PAGE_TYPE_INDEX)) {
            $this->pageConfig->addRemotePageAsset(
                $this->_url->getBaseUrl(),
                'canonical',
                ['attributes' => ['rel' => 'canonical']]
            );
        }

        return parent::_prepareLayout();
    }

    /**
     * Prepare posts collection
     *
     * @return void
     */
    protected function _preparePostCollection()
    {
        parent::_preparePostCollection();

        $displayMode = $this->_scopeConfig->getValue(
            \Magefan\Blog\Model\Config::XML_PATH_HOMEPAGE_DISPLAY_MODE,
            ScopeInterface::SCOPE_STORE
        );
        /* If featured posts enabled */
        if ($displayMode == 1) {
            $postIds = $this->_scopeConfig->getValue(
                \Magefan\Blog\Model\Config::XML_PATH_HOMEPAGE_FEATURED_POST_IDS,
                ScopeInterface::SCOPE_STORE
            );
            $this->_postCollection->addPostsFilter($postIds);
        } else {
            $this->_postCollection->addRecentFilter();
        }
    }

     /**
      * Retrieve collection order field
      *
      * @return string
      */
    public function getCollectionOrderField()
    {
        $postsSortBy = $this->_scopeConfig->getValue(
            \Magefan\Blog\Model\Config::XML_PATH_HOMEPAGE_POSTS_SORT_BY,
            ScopeInterface::SCOPE_STORE
        );

        switch ($postsSortBy) {
            case PostsSortBy::POSITION:
                return self::POSTS_SORT_FIELD_BY_POSITION;
            case PostsSortBy::TITLE:
                return self::POSTS_SORT_FIELD_BY_TITLE;
            default:
                return parent::getCollectionOrderField();
        }
    }

    /**
     * Retrieve collection order direction
     *
     * @return string
     */
    public function getCollectionOrderDirection()
    {
        $postsSortBy = $this->_scopeConfig->getValue(
            \Magefan\Blog\Model\Config::XML_PATH_HOMEPAGE_POSTS_SORT_BY,
            ScopeInterface::SCOPE_STORE
        );

        if (PostsSortBy::TITLE == $postsSortBy) {
            return SortOrder::SORT_ASC;
        }
        return parent::getCollectionOrderDirection();
    }

    /**
     * Retrieve blog title
     * @return string
     */
    protected function _getConfigValue($param)
    {
        return $this->_scopeConfig->getValue(
            'mfblog/index_page/'.$param,
            ScopeInterface::SCOPE_STORE
        );
    }


    /**
     * Prepare breadcrumbs
     *
     * @param  string $title
     * @param  string $key
     * @throws \Magento\Framework\Exception\LocalizedException
     * @return void
     */
    protected function _addBreadcrumbs($title = null, $key = null)
    {
        if ($breadcrumbsBlock = $this->getBreadcrumbsBlock()) {
            $breadcrumbsBlock->addCrumb(
                'home',
                [
                    'label' => __('Home'),
                    'title' => __('Go to Home Page'),
                    'link' => $this->_storeManager->getStore()->getBaseUrl()
                ]
            );

            $blogTitle = $this->_scopeConfig->getValue(
                'mfblog/index_page/title',
                ScopeInterface::SCOPE_STORE
            );
            $breadcrumbsBlock->addCrumb(
                'blog',
                [
                    'label' => __($blogTitle),
                    'title' => __($blogTitle),
                    'link' => null,
                ]
            );
        }
    }
}
