<?php
namespace frontend\widgets;

use common\models\SeoDynamic;
use common\modules\product\models\Brand;
use common\modules\rubrication\models\TaxGroup;
use common\modules\rubrication\models\TaxOption;
use yii\base\Widget;
use yii\helpers\ArrayHelper;

class Seo extends Widget
{
    private $url;
    public $row;
    public $own_attr;
    public $fields;
    public $category_name;
    public $page;
    public $description;
    public $title;
    public $meta;
    public $seo_text;
    public $h1;
    public $key;
    public $name;
    public $project_name;
    public static $optionsList;
    protected static $check_url;
    protected static $check_url_bool;


    const SEO_TEXT = 'seo_text';
    const DESCRIPTION = 'description';
    const META = 'meta';
    const H1 = 'h1';
    const TITLE = 'title';
    const PAGE = 'page';

    public function init()
    {
        $this->url = \Yii::$app->request->url;
        $this->project_name = \Yii::$app->name;
        $this->page = \Yii::$app->request->get('page', []);
        if(empty(self::$optionsList)){
            self::$optionsList = ArrayHelper::getColumn(TaxGroup::find()->where(['is_filter' => 'TRUE'])->all(),'alias');
        }

        parent::init();

    }


    public function run()
    {

        $seoData = $this->getViewData();


        foreach ($seoData as $key => $value) {
            $this->$key = $value;
        }


        $priority = 0;
        switch ($this->row) {
            case self::SEO_TEXT:


                $filter = \Yii::$app->request->get('filters', []);
                $sort = \Yii::$app->request->get('sort', []);

                if(empty($filter) && empty($sort) && empty($this->page) ){

                    return $this->selectSeoData(self::SEO_TEXT, $priority);

                } else {

                    $widgetData = static::findSeoByUrl($this->url);

                    $result = '';

                    if ($widgetData instanceof \common\models\Seo) {

                        $result = $widgetData->{self::SEO_TEXT};

                    } else {

                        $widgetData = $this->findSeoByDynamic();

                        if ($widgetData instanceof SeoDynamic) {

                            $result = $widgetData->{self::SEO_TEXT};

                        }

                    }

                    return $this->replaceData($result);
                }


                break;
            case self::H1:

                $filter = \Yii::$app->request->get('filters', []);

                $default = $this->selectSeoData(self::H1, $priority);

                if (($default != $this->{self::H1}) || $priority == 1) {

                    return $default;


                } else if(!empty($filter) && !$this->checkFilter($filter)){

                    $array = $this->arrayBuilder($filter);
                    return $this->getNameString($array);
                }
                else {

                    return $default;
                }
                break;
            case self::TITLE:

                $filter = \Yii::$app->request->get('filters', []);


                $title = $this->selectSeoData(self::TITLE, $priority);


                if(!empty($filter) && isset($this->fields['meta-title']) && $title == $this->fields['meta-title']) {

                    $array = [
                        'category' => $this->category_name
                    ];


                    if (isset($filter['brands']) && count($filter['brands']) == 1) {
                        $model = Brand::find()->where(['alias' => $filter['brands'][0]])->one();
                        if(!$model instanceof Brand){

                            \Yii::$app->response->redirect(['/site/error'],404);
                        } else {
                            $array['brand'] = $model->name;
                        }

                    }


                    foreach(self::$optionsList as $optionList){


                        if (isset($filter[$optionList]) && count($filter[$optionList]) == 1) {

                            $model = TaxOption::find()->where(['alias' =>$filter[$optionList]])->one();
                            if(!$model instanceof TaxOption){

                                \Yii::$app->response->redirect(['site/error'],404);
                            } else {
                                $array[$optionList] = $model->value->value;
                            }


                        }


                    }

                    $title_string = $this->getTitleString($array);

                    if($title_string){
                        return $this->addPage($this->my_mb_ucfirst(trim($title_string)));
                    }

                }

                if (!empty($title)) {
                    return $this->addPage($title);
                } else  {
                    return $this->addPage($this->project_name);
                }

                break;
            case self::DESCRIPTION:
                $description = $this->selectSeoData(self::DESCRIPTION, $priority);


                $filter = \Yii::$app->request->get('filters', []);

                if(!empty($filter) && $description == $this->{self::DESCRIPTION}){
                    $array = $this->arrayBuilder($filter);
                    $this->getView()->registerMetaTag([
                        'name' => 'description',
                        'content' => $this->addPage($this->getDescriptionString($array))
                    ]);
                }elseif (!empty($description)) {

                    $this->getView()->registerMetaTag([
                        'name' => 'description',
                        'content' => $this->addPage($description)
                    ]);

                }

                break;
            case self::META:

                $meta = $this->selectSeoData(self::META, $priority);

                $filter = \Yii::$app->request->get('filters', []);
                $sort = \Yii::$app->request->get('sort', []);
                $paginate = \Yii::$app->request->get('page', []);
                $language = \Yii::$app->request->get('language', []);


                if (!empty($meta) && empty($sort) && !isset($filter['prices']) ) {

                    $this->getView()->registerMetaTag([
                        'name' => 'robots',
                        'content' => $meta
                    ]);

                } else if(!empty($filter['special'])){

                    $this->getView()->registerMetaTag([
                        'name' => 'robots',
                        'content' => 'noindex,follow'
                    ]);

                } else if (
                    isset($filter['brands']) && count($filter['brands']) > 1
                    || isset($filter)  && $this->checkFilter($filter)|| !empty($sort) || isset($filter['prices'])

                ) {


                    $this->getView()->registerMetaTag([
                        'name' => 'robots',
                        'content' => 'noindex,nofollow'
                    ]);

                } else if ( isset($filter) && count($filter, COUNT_RECURSIVE) > 4) {
                    $this->getView()->registerMetaTag([
                        'name' => 'robots',
                        'content' => 'noindex,follow'
                    ]);
                }
                else if (isset($language) && $language == 'ua') {
                    $this->getView()->registerMetaTag([
                        'name' => 'robots',
                        'content' => 'noindex,nofollow'
                    ]);
                }
                else {

                    $this->getView()->registerMetaTag([
                        'name' => 'robots',
                        'content' => 'index,follow'
                    ]);
                }


                break;
        }


    }


    protected function checkFilter($filter){
        foreach(self::$optionsList as $optionList){

            if(isset($filter[$optionList]) && count($filter[$optionList])  > 1){
                return true;
            }

        }
        return false;
    }

    protected function replaceData($str)
    {

        if (!empty($this->fields)) {
            foreach ($this->fields as $field_name => $field_value) {
                $str = str_replace('{' . $field_name . '}', $field_value, $str);
            }
        }
        $str = str_replace('{project_name}', $this->project_name, $str);
        return $str;
    }

    protected static function findSeoByUrl($url)
    {
        if(empty(self::$check_url_bool)){
            self::$check_url = \common\models\Seo::findOne(['url' => $url]);
            self::$check_url_bool = true;
        }
        return self::$check_url;
    }

    protected function findSeoByDynamic()
    {

        if(!empty($this->key)){

            $query = SeoDynamic::find()->joinWith('seoCategory')->where(['controller' => \Yii::$app->controller->id, 'action' => \Yii::$app->controller->action->id, 'key' => $this->key]);
        } else {


            $query = SeoDynamic::find()->joinWith('seoCategory')->where(['controller' => \Yii::$app->controller->id, 'action' => \Yii::$app->controller->action->id]);
        }

        return $query->one();
    }

    protected function findSeoByDynamicForFilters(){
        return SeoDynamic::find()->joinWith('seoCategory')->where(['param' =>'filters'])->one();
    }

    protected function getViewData()
    {
        $params = $this->getView()->params;
        if (isset($params['seo'])) {
            return $params['seo'];
        } else {
            return [];
        }
    }

    protected function selectSeoData($param, &$priority)
    {
        $result = '';

        $widgetData = static::findSeoByUrl($this->url);

        if ($widgetData instanceof \common\models\Seo) {

            $result = $widgetData->$param;
            $priority = 1;

        } else if (!empty($this->$param)) {

            $result = $this->$param;
            $priority = 2;

        } else {

            $widgetData = $this->findSeoByDynamic();

            if ($widgetData instanceof SeoDynamic) {

                $result = $widgetData->$param;
                $priority = 3;

            }

        }

        return   $this->replaceData($result);

    }

    public function getTitleString($array){

        $template = SeoDynamic::find()->select('title')->where(['param' =>'filters'])->one();
        if($template instanceof SeoDynamic){
            foreach ($array as $field_name => $field_value) {
                $template->title = str_replace('{' . $field_name . '}', mb_strtolower($field_value), $template->title);
            }
            $template =  preg_replace('/\{.[^\}]*\}\s/','',$template->title);
            return $template;
        }

        return false;

    }

    public function my_mb_ucfirst($str) {
        $str = strtolower($str);
        $fc = mb_strtoupper(mb_substr($str, 0, 1));
        return $fc.mb_substr($str, 1);
    }

    public function getDescriptionString($array){
        // "{Название раздела | Название блока фильтра: Фильтр 1 | Название блока фильтра: Фильтр 2 | Название блока фильтра: Фильтр 3}. по самой лучшей цене с гарантией от производителя - Ruzkachok.com.ua";
        $row = '';
        foreach($array as $name => $field){

            if($name == 'category' ){
                $row = $field.' '.$row;
            } else {
                $row .= $field['value'].' '  ;
            }


        }
        $row .= " по самой лучшей цене с гарантией от производителя - Ruzkachok.com.ua";
        return $row;

    }

    public function getNameString($array){
        $row = '';
        foreach($array as $name => $field){

            if($name == 'category' ){
                $row = $field.' '.$row;
            } else {
                $row .= $field['value'].' '  ;
            }


        }

        return $row;

    }

    public function arrayBuilder($filter)
    {

        $array = [
            'category' => $this->category_name
        ];


        if (isset($filter['brands']) && count($filter['brands']) == 1) {
            $model = Brand::find()->where(['alias' => $filter['brands'][0]])->one();
            if (!$model instanceof Brand) {

                \Yii::$app->response->redirect(['/site/error'], 404);
            } else {
                $array['brand']['name'] = 'Бренд';
                $array['brand']['value'] = $model->name;
            }

        }


        $optionsList = ArrayHelper::map(TaxGroup::find()->where(['is_filter' => 'TRUE'])->all(), 'alias', 'name');


        foreach ($optionsList as $optionList => $name) {


            if (isset($filter[$optionList]) && count($filter[$optionList]) == 1) {

                $model = TaxOption::find()->where(['alias' => $filter[$optionList]])->one();
                if (!$model instanceof TaxOption) {

                    \Yii::$app->response->redirect(['site/error'], 404);
                } else {
                    $array[$optionList]['value'] = $model->value->value;
                    $array[$optionList]['name'] = $name;
                }


            }


        }

        return $array;

    }


    public function addPage($string){

        if($this->page){
            return $string." - страница {$this->page}";
        }
        return $string;
    }
}