<?php
    
    namespace common\modules\product\models;
    
    use yii\base\Model;
    use yii\data\ActiveDataProvider;
    use yii\db\ActiveQuery;
    
    /**
     * BrandSearch represents the model behind the search form about
     * `common\modules\product\models\Brand`.
     */
    class BrandSearch extends Brand
    {
        
        public $brand_name;
        
        /**
         * @inheritdoc
         */
        public function rules()
        {
            return [
                [
                    [ 'brand_name' ],
                    'safe',
                ],
                [
                    [ 'brand_id' ],
                    'integer',
                ],
            ];
        }
        
        public function behaviors()
        {
            return [];
        }
        
        /**
         * @inheritdoc
         */
        public function scenarios()
        {
            // bypass scenarios() implementation in the parent class
            return Model::scenarios();
        }
        
        /**
         * Creates data provider instance with search query applied
         *
         * @param array $params
         *
         * @return ActiveDataProvider
         */
        public function search($params)
        {
            $query = Brand::find()
                          ->joinWith('lang');
            
            // add conditions that should always apply here
            
            $dataProvider = new ActiveDataProvider([
                'query' => $query,
            ]);
            
            $this->load($params);
            
            /*if (!$this->validate()) {
                // uncomment the following line if you do not want to return any records when validation fails
                // $query->where('0=1');
                return $dataProvider;
            }*/
            
            $dataProvider->setSort([
                'attributes' => [
                    'brand_id',
                    'brand_name' => [
                        'asc'  => [ 'brand_lang.name' => SORT_ASC ],
                        'desc' => [ 'brand_lang.name' => SORT_DESC ],
                    ],
                ],
            ]);
            
            // grid filtering conditions
            $query->andFilterWhere([
                'brand.brand_id' => $this->brand_id,
            ])
                  ->andFilterWhere([
                      'ilike',
                      'brand_lang.name',
                      $this->brand_name,
                  ]);
            
            return $dataProvider;
        }
        
        /**
         * @param null|Category    $category
         * @param array            $params
         * @param null|ActiveQuery $productQuery
         *
         * @return ActiveQuery
         */
        public function getBrands($category = NULL, $params = [], $productQuery = NULL)
        {
            
            $query = Brand::find()
                          ->select([
                              Brand::tableName() . '.*',
                          ])
                          ->innerJoin(Product::tableName(), Product::tableName() . '.brand_id=' . Brand::tableName() . '.brand_id')
                          ->innerJoin(ProductCategory::tableName(), ProductCategory::tableName() . '.product_id=' . Product::tableName() . '.product_id');
            
            $query->innerJoin('product_variant', 'product_variant.product_id = ' . Product::tableName() . '.product_id');
            $query->where([
                '!=',
                'product_variant.stock',
                0,
            ]);
            $query->groupBy(Product::tableName() . '.product_id');
            if(!empty( $category )) {
                $query->andWhere([
                    ProductCategory::tableName() . '.category_id' => $category->category_id,
                ]);
            }
            $query->groupBy(Brand::tableName() . '.brand_id');
            
            return $query;
        }
    }