<?php

namespace App\Search;

class View extends \Qs_ViewController
{
    const DEFAULT_TITLE_FIELD = 'title';

    protected $_actions = ['partialList', 'providerList'];
    protected $_hasFilter = true;
    protected $_hasLog = true;

    /** @var array */
    protected $_filter;

    /** @var array */
    protected $_provider;

    /** @var array */
    protected $_providers;

    /** @var array */
    protected $_providersAliases;

    /**
     * @return View|\Qs_ViewController
     */
    public function exec()
    {
        \Qs_Navigation::disable();

        if ($this->_restParams) {
            $alias = reset($this->_restParams);
            if (!in_array($alias, $this->_getProvidersAliases())) {
                $this->_do404();
                return $this;
            }
            $this->_provider = $this->_getProviderByAlias($alias);
            $this->_defaultAction = 'providerList';
        }

        return parent::exec();
    }

    /**
     * @return mixed
     * @throws \Qs_Exception
     */
    protected function _getProviders()
    {
        if (null === $this->_providers) {
            $this->_providers = $this->getConfig('providers')->toArray();
            if (!$this->_providers || !is_array($this->_providers)) {
                throw new \Qs_Exception('Search data providers are not defined.');
            }
        }
        return $this->_providers;
    }

    /**
     * @return array
     * @throws \Qs_Exception
     */
    protected function _getProvidersAliases()
    {
        if (null === $this->_providersAliases) {
            $this->_providersAliases = \Qs_Array::fetchCol($this->_getProviders(), 'fullResultsAlias');
            if (!$this->_providersAliases || !is_array($this->_providersAliases)) {
                throw new \Qs_Exception('Search data providers declaration is wrong.');
            }
        }
        return $this->_providersAliases;
    }

    /**
     * @param string $alias
     * @return array|bool
     */
    protected function _getProviderByAlias($alias)
    {
        $providers = $this->_getProviders();
        /** @var array $provider */
        foreach ($providers as $provider) {
            if ($alias == $provider['fullResultsAlias']) {
                return $provider;
            }
        }
        return false;
    }

    /**
     * @return array
     */
    protected function _getFilterFormOptions()
    {
        $options = [
            'method' => 'get',
        ];
        return $options;
    }

    /**
     * @return View|\Qs_ViewController
     */
    protected function _addFilterItem()
    {
        if ($this->_hasFilter) {
            $form = $this->_getFilterForm();
            if ($form->isSubmitted() && $form->validate()) {
                $this->_filter = $form->getValues();
            }
            $this->_addFormItem($form);
        }
        return $this;
    }

    /**
     * @return array
     */
    protected function _getListOptions()
    {
        $options = [
            'restParams'   => $this->getRestParams(),
            'templatePath' => $this->_getTemplatePath(),
            'idItem'       => $this->getIdItem(),
        ];
        return $options;
    }

    /**
     * @param array $provider
     * @return \Qs_Db_Obj
     * @throws \Qs_Exception
     */
    protected function _getProviderDataObj(array $provider)
    {
        if (class_exists($provider['dataObjClass'])) {
            /** @var \Qs_Db_Obj $dataObj */
            $dataObj = new $provider['dataObjClass'];
            $dataObj->addFilter($this->_filter);
            if (!empty($provider['filterFields'])) {
                $dataObj->setFilterFields($provider['filterFields']);
            }
        } else {
            throw new \Qs_Exception('Search provider with class ' . $provider['dataObjClass'] . ' is not found.');
        }

        return $dataObj;
    }

    /**
     * @param array $provider
     * @return array
     */
    protected function _getProviderTemplatePath(array $provider)
    {
        /** @var array $paths */
        $paths = $this->_getTemplatePath();
        $dir = preg_split('/[^a-zA-Z0-9]+/', $provider['fullResultsAlias']);
        array_walk($dir, function (&$value, $key) {
            $value = ucfirst($value);
        });
        $dir = implode('', $dir);
        $providerPath = reset($paths) . '/Provider/' . $dir;
        array_unshift($paths, $providerPath);
        return $paths;
    }

    /**
     * @param array $provider
     * @return \Qs_ViewController_List
     */
    protected function _getProviderList(array $provider)
    {
        $className = $this->_getClassName('List', substr($provider['dataObjClass'], 0, -3));
        if (!class_exists($className)) {
            $className = 'Qs_ViewController_List';
        }

        /** @var \Qs_ViewController_List $list */
        $list = new $className($this->_getListOptions());
        $list->addUrlVariables(['query']);

        return $list;
    }

    /**
     * @return View
     */
    protected function _addPartialListItem()
    {
        $emptyResults = true;

        foreach ($this->_getProviders() as $provider) {

            $dataObj = $this->_getProviderDataObj($provider);

            $list = $this->_getProviderList($provider);
            $list->setIpp(\Qs_Array::get($provider, 'shortResultsLimit', $this->getConfig('shortResultsLimit')));
            $list->setList($dataObj->setSelectOptions($list->getSelectOptions())->getSearchList($provider));
            $list->setListSelect($dataObj->getListSelect());

            $item = $list->toArray();
            if (empty($item['list'])) {
                continue;
            } else {
                $emptyResults = false;
            }

            $item['provider'] = $provider;
            $item['baseUrl'] = constant('BASE_URL') . '/' . constant('CURRENT_PAGE_FINAL');
            $item['filterString'] = http_build_query($this->_filter);
            $item['templatePath'] = $this->_getProviderTemplatePath($provider);

            $item['tpl'] = \Qs_SiteMap::getTemplate('partialList.tpl', $item['templatePath']);
            $this->_doc->addItem($item);

            if ($this->_doc->isGtmEnabled() && $dataObj instanceof \App_ECommerce_Product_Search_Obj) {
                $this->_addGtmValues($item['list'], $list);
            }
        }

        if ($emptyResults) {
            $this->_addItem(['tpl' => $this->getTemplate('empty-results.tpl')]);
        }

        return $this;
    }

    /**
     * @return View
     * @throws \Qs_Exception
     */
    protected function _addProviderListItem()
    {
        if ($this->_provider) {
            $dataObj = $this->_getProviderDataObj($this->_provider);

            $list = $this->_getProviderList($this->_provider);
            $list->setList($dataObj->setSelectOptions($list->getSelectOptions())->getSearchList($this->_provider));
            $list->setListSelect($dataObj->getListSelect());

            $item = $list->toArray();
            $item['baseUrl'] = constant('BASE_URL') . '/' . constant('CURRENT_PAGE_FINAL');
            $item['filterString'] = http_build_query($this->_filter);
            $item['providerTitle'] = $this->_provider['providerTitle'];

            $item['partialSearchUrl'] = BASE_URL_LANGUAGE . '/' . CURRENT_PAGE_FINAL
                . '?' . http_build_query($this->_filter);

            $item['templatePath'] = $this->_getProviderTemplatePath($this->_provider);
            $item['tpl'] = \Qs_SiteMap::getTemplate('providerList.tpl', $item['templatePath']);
            $this->_doc->addItem($item);

            if ($this->_doc->isGtmEnabled() && $dataObj instanceof \App_ECommerce_Product_Search_Obj) {
                $this->_addGtmValues($item['list'], $list);
            }
        } else {
            throw new \Qs_Exception('Search data provider is not defined');
        }

        return $this;
    }

    protected function _addGtmValues(array $products, \Qs_ViewController_List $list)
    {
        $products = array_combine(\Qs_Array::fetchCol($products, 'id'), $products);
        foreach ($products as &$product) {
            $product['title'] = strip_tags($product['title']);
        }

        $listTitle = 'Search Results';
        $pageNumber = (int) $list->getPageNumber();
        $ipp = (int) $this->_getList()->getIpp();
        $startPosition = --$pageNumber * $ipp;
        $this->_doc->addGtmValues(\Qs_Gtm::eeGetProductImpressions($products, null, $listTitle, $startPosition));

        $options = [
            'products'    => \Qs_Gtm::eeGetProducts($products, \Qs_Gtm::DATASET_CLICK, [], true),
            'actionField' => ['list' => $listTitle],
        ];
        $this->_doc->addInitObject('lib.Gtm', [$options]);
    }

    /**
     * @return View
     */
    protected function _doPartialList()
    {
        $this->_addFilterItem();
        if ('' != $this->_filter['query']) {
            $this->_addPartialListItem();
            $this->_log();
        } else {
            $this->_addItem(['tpl' => $this->getTemplate('empty-query.tpl')]);
        }
        return $this;
    }

    /**
     * @return View
     */
    protected function _doProviderList()
    {
        $this->_addFilterItem();
        if (!empty($this->_filter['query'])) {
            $this->_addProviderListItem();
            $this->_log();
        } else {
            $this->_addItem(['tpl' => $this->getTemplate('empty-query.tpl')]);
        }
        return $this;
    }

    /**
     * @return View|\Qs_ViewController
     */
    protected function _log()
    {
        if ($this->_hasLog && \Qs_ViewController_Log::getEnabled()) {
            $this->_getLog()->write($this->_action, $this->_getObjectInfo());
        }
        return $this;
    }

    protected function _getObjectInfo()
    {
        $info = [];
        $info['itemName'] = $this->getConfig('itemName');
        $info['itemsName'] = $this->getConfig('itemsName');

        if ($this->_provider) {
            $info = array_merge($info, $this->_provider);
        }

        $info = array_merge($info, $this->_filter);

        return $info;
    }

    protected function _getLog()
    {
        if (null === $this->_log) {
            parent::_getLog();
            if (\Qs_Array::get($this->_filter, 'query')) {
                $this->_log->addIgnoredControllers('App_Cms_View');
                $this->_log->setAction('partialList', 'Made a site search. Keyword(s): "%query%"');
                $this->_log->setAction('providerList', 'Made a site search. Category: %providerTitle%; Keyword(s): "%query%"');
            } else {
                $this->_log->removeIgnoredController('App_Cms_View');
            }
        }
        return $this->_log;
    }
}