<?php

namespace WPSocialReviews\App\Services\Platforms\Feeds\Youtube;

use WPSocialReviews\App\Services\GlobalSettings;
use WPSocialReviews\App\Services\Onboarding\OnboardingHelper;
use WPSocialReviews\App\Services\Helper as GlobalHelper;
use WPSocialReviews\App\Services\Platforms\Feeds\BaseFeed;
use WPSocialReviews\App\Services\Platforms\Feeds\CacheHandler;
use WPSocialReviews\App\Services\Platforms\Feeds\Common\FeedFilters;
use WPSocialReviews\App\Services\Platforms\Feeds\Config;
use WPSocialReviews\App\Services\Platforms\Feeds\Youtube\Config as YoutubeConfig;
use WPSocialReviews\Framework\Support\Arr;
use WPSocialReviews\App\Models\Cache;
use WPSocialReviews\App\Services\Platforms\ImageOptimizationHandler;

if (!defined('ABSPATH')) {
    exit;
}

class YoutubeFeed extends BaseFeed
{
    public $platform = 'youtube';
    protected $postId = null;
    protected $oauth;
    protected $cacheHandler;
    private $remoteFetchUrl = 'https://www.googleapis.com/youtube/v3/';
    private $cronScheduleName = 'wpsr_youtube_feed_update';

    public function __construct()
    {
        parent::__construct($this->platform);
        $this->oauth        = new OAuth();
        $this->cacheHandler = new CacheHandler($this->platform);
         (new ImageOptimizationHandler($this->platform))->registerHooks();
    }

    public function pushValidPlatform($platforms)
    {
        $isActive = get_option('wpsr_'.$this->platform.'_verification_configs');
        if($isActive) {
            $platforms['youtube'] = __('Youtube', 'wp-social-reviews');
        }
        return $platforms;
    }

    /**
     * Save YouTube config on wp options table
     *
     * @return json
     * @since 1.2.5
     */
    public function handleCredential($settings = array())
    {
        // verify access token and API key
        try {
            $credentialsType = $settings['credentialsType'];
            $apiKey          = $settings['apiKey'];
            $accessCode      = $settings['accessCode'];
            $accessToken     = $settings['accessToken'];

            $url  = $this->makeConfigAPIRequestUrl($credentialsType, $accessCode, $apiKey, $accessToken);
            $data = $this->getAPIData($url['fetchUrl'], $url['args']);

			if (is_wp_error($data)) {
				$message = $data->get_error_message();
				wp_send_json_error([
					'message' => $message
				], 423);
			}

            if (isset($data['error']) || !empty($data['error'])) {
                $code = isset($data['error']['code']) ? $data['error']['code'] : 401;
                wp_send_json_error([
                    'message' => isset($data['error']['errors'][0]) ? $data['error']['errors'][0]['message'] : __('Sorry, Something went wrong!', 'wp-social-reviews')
                ], $code);
            }

            $configs = [];
            if ((!empty($data) && isset($data['items'][0])) && ($credentialsType === 'oauth2.0' || $credentialsType === 'manually_connect')) {
                $configs['channel_id'] = $data['items'][0]['id'];
                $configs['user_name']  = $data['items'][0]['snippet']['title'];
                $configs['user_avatar'] = $data['items'][0]['snippet']['thumbnails']['high']['url'];
            } else {
                $configs['channel_id'] = 'UCiyeXfnGx9e06hXWf0Hz7ow';
            }

            $configs['access_token']     = Arr::get($url, 'accessToken', '');
            $configs['refresh_token']    = Arr::get($url, 'refresh_token', '');
            $configs['expires_in']       = Arr::get($url, 'expires_in', '');
            $configs['version']          = 'latest';
            $configs['api_key']          = $apiKey;
            $configs['access_code']      = $accessCode;
            $configs['credentials_type'] = $credentialsType;
            $configs['created_at']       = time();
            update_option('wpsr_youtube_verification_configs', $configs, 'no');
            $settings = get_option('wpsr_youtube_verification_configs');

            // add global youtube settings when user verified
            $args = [
                'global_settings' => [
                    'expiration'    => 259200,
                    'caching_type'     => 'background'
                ]
            ];
            update_option('wpsr_youtube_global_settings', $args);

            //$this->doCronEvent();
            wp_send_json_success([
                'settings' => $settings,
                'message'  => __('You are Successfully Verified', 'wp-social-reviews')
            ]);
        } catch (\Exception $exception) {
            wp_send_json_error([
                'message' => $exception->getMessage()
            ], 423);
        }
    }

    /**
     * Make api request url base on credentials type
     *
     * @param string $credentialsType
     * @param string $accessCode
     * @param string $apiKey
     * @param string $accessToken
     *
     * @return array
     * @throws /Exception
     * @since 1.2.5
     */
    private function makeConfigAPIRequestUrl($credentialsType = '', $accessCode = '', $apiKey = '', $accessToken = '')
    {
        $url = [];
        if (($credentialsType === 'oauth2.0' && empty($accessCode)) || ($credentialsType === 'api_key' && empty($apiKey)) || ($credentialsType === 'manually_connect' && empty($accessToken))) {
            wp_send_json_error([
                'message' => __('Field should not be empty!', 'wp-social-reviews')
            ], 423);
        }
        if (($credentialsType === 'oauth2.0' || $credentialsType === 'manually_connect')) {
            if ($accessCode && $credentialsType === 'oauth2.0') {
                $result = $this->oauth->generateAccessKey($accessCode);
                if (is_wp_error($result)) {
                    throw new \Exception(esc_html($result->get_error_message()));
                }
                $tokens['credentials_type'] = 'oauth2.0';
                $accessToken                = $result['access_token'];
                $refreshToken               = $result['refresh_token'];
                $expireTime                 = $result['expires_in'];
                $url['expires_in']          = $expireTime;
                $url['refresh_token']       = $refreshToken;
            }
            $args               = [
                'headers' => [
                    'Authorization' => 'Bearer ' . $accessToken,
                ],
            ];
            $url['args']        = $args;
            $url['accessToken'] = $accessToken;
            $part               = 'mine=true&access_token=' . $accessToken;
            $fetchUrl           = 'https://www.googleapis.com/youtube/v3/channels?part=id,snippet&contentDetails&' . $part;
            $url['fetchUrl']    = $fetchUrl;
        }
        if ($credentialsType === 'api_key' && $apiKey) {
            $part            = 'key=' . $apiKey;
            $fetchUrl        = 'https://www.googleapis.com/youtube/v3/search?part=snippet&q=YouTube+Data+API&type=video&' . $part;
            $url['fetchUrl'] = $fetchUrl;
            $url['args']     = [];
        }

        return $url;
    }

    /**
     * get verified youtube configs data from wp options table
     *
     * @return json
     * @since 1.2.5
     */
    public function getVerificationConfigs()
    {
        $configs = get_option('wpsr_youtube_verification_configs');
        $configs['version'] = Arr::get($configs, 'version', '');

        wp_send_json_success([
            'message'  => __('Youtube Successfully Connected!', 'wp-social-reviews'),
            'settings' => $configs
        ], 200);
    }

    /**
     * delete youtube configs data from wp options table
     *
     * @return json
     * @since 1.2.5
     */
    public function clearVerificationConfigs()
    {
        $has_wpsr_optimize_images_table = get_option( 'wpsr_optimize_images_table_status', false);
        if($has_wpsr_optimize_images_table){
            $imageOptimizationObj = new ImageOptimizationHandler($this->platform);
            $imageOptimizationObj->resetData($this->platform);
        }

        delete_option('wpsr_youtube_verification_configs');
        $this->cacheHandler->clearCache();
        wp_send_json_success([
            'message' => __('Youtube Successfully Disconnected!', 'wp-social-reviews'),
        ], 200);
    }

    public function getTemplateMeta($settings = [], $postId = null)
    {
        $this->postId = $postId;
        $feed_settings = Arr::get($settings, 'feed_settings', []);
        $apiSettings   = Arr::get($feed_settings, 'source_settings', []);
        $response      = $this->apiConnection($apiSettings, $postId);

        if (isset($response['error_message'])) {
            $filterResponse = $response;
        } else {
            $filterResponse = (new FeedFilters())->filterFeedResponse($this->platform, $feed_settings, $response);
        }

        $settings['dynamic'] = $filterResponse;

        $global_settings = get_option('wpsr_youtube_global_settings');
        $advanceSettings = (new GlobalSettings())->getGlobalSettings('advance_settings');

        $optimized_images = Arr::get($global_settings, 'global_settings.optimized_images', 'false');
        $has_gdpr = Arr::get($advanceSettings, 'has_gdpr', "false");

        $items = $settings['dynamic']['items'] ?? [];
        foreach ($items as $index => $item) {
            $configs = get_option('wpsr_youtube_verification_configs');
            $userAvatar = $configs['user_avatar']  ?? null;
            $accountId = $configs['channel_id'] ?? null;
            $headerMeta = 'avatars';

            $imageOptimizationHandler = new ImageOptimizationHandler($this->platform);
            if (method_exists($imageOptimizationHandler, 'maybeLocalHeader')) {
                $local_avatar = $imageOptimizationHandler->maybeLocalHeader($accountId, $userAvatar, $global_settings, $headerMeta);
                $settings['dynamic']['items'][$index]['user_avatar'] = $local_avatar ?? $userAvatar;
            }
        }

        if ($has_gdpr === "true" && $optimized_images == "false") {
            $settings['dynamic']['items'] = [];
            $settings['dynamic']['header'] = [];
            $settings['dynamic']['error_message'] = [
                'error_message' => __('YouTube feeds are not being displayed due to the "optimize images" option being disabled. If the GDPR settings are set to "Yes," it is necessary to enable the optimize images option.', 'wp-social-reviews')
            ];
        }

        if (Arr::get($settings, 'feed_settings.created_from_onboarding')) {
            OnboardingHelper::applyOnboardingSettings($postId, 'youtube', $settings);
        }

        return $settings;
    }

    /**
     * Handle YouTube Feed
     *
     * Make sure all data related to you tube settings are formatted with dynamic youtube feed data from api
     *
     * @return array
     * @since 1.2.5
     */
    public function getEditorSettings($args = [])
    {
        $postId = Arr::get($args, 'postId');
        $youtubeConfig = new YoutubeConfig();

        $feed_meta       = get_post_meta($postId, '_wpsr_template_config', true);
        $feed_style_meta = get_post_meta($postId, '_wpsr_template_styles_config', true);
        $decodedMeta     = json_decode($feed_meta, true);
        $feed_settings   = Arr::get($decodedMeta, 'feed_settings', []);
        $feed_settings   = Config::formatYoutubeConfig($feed_settings, []);
        $settings        = $this->getTemplateMeta($feed_settings, $postId);
        $settings['styles_config'] = $youtubeConfig->formatStylesConfig(json_decode($feed_style_meta, true), $postId);

        $global_settings = get_option('wpsr_'.$this->platform.'_global_settings');
        $advanceSettings = (new GlobalSettings())->getGlobalSettings('advance_settings');

        $image_settings = [
            'optimized_images' => Arr::get($global_settings, 'global_settings.optimized_images', 'false'),
            'has_gdpr' => Arr::get($advanceSettings, 'has_gdpr', "false")
        ];

        $templateDetails = get_post($postId);
        wp_send_json_success([
            'message'          => __('Success', 'wp-social-reviews'),
            'settings'         => $settings,
            'image_settings'   => $image_settings,
            'template_details' => $templateDetails,
            'elements'         => $youtubeConfig->getStyleElement()
        ], 200);
    }

    /**
     * Show updated data if new data fetched in editor without update in db
     *
     * @return json
     * @throws /Exception
     * @since 1.2.5
     */
    public function editEditorSettings($configs = [], $postId = null)
    {
        $editMode = $configs['edit_mode'];
        unset($configs['edit_mode']);

        $styles_config = Arr::get($configs, 'styles_config');

        $feed_meta     = Arr::get($configs, 'feed_settings', []);
        $feed_settings = Config::formatYoutubeConfig($feed_meta, []);
        $feedType      = isset($feed_meta['source_settings']['feed_type']) ? $feed_meta['source_settings']['feed_type'] : 'channel_feed';

        if($editMode){
            $errorCacheName = 'yt_'. $feedType .'_' .$postId . '_error';
            $this->cacheHandler->clearCacheByName($errorCacheName);
        }
        if ($feedType === 'single_video' && $editMode === 'fetching') {
            $cacheName = 'single_video_feed_id_' . $postId;
            $this->cacheHandler->clearCacheByName($cacheName);
        }

        $settings = $this->getTemplateMeta($feed_settings, $postId);
        $settings['styles_config'] = $styles_config;

        $global_settings = get_option('wpsr_'.$this->platform.'_global_settings');
        $advanceSettings = (new GlobalSettings())->getGlobalSettings('advance_settings');

        $image_settings = [
            'optimized_images' => Arr::get($global_settings, 'global_settings.optimized_images', 'false'),
            'has_gdpr' => Arr::get($advanceSettings, 'has_gdpr', "false")
        ];
        $settings['image_settings'] = $image_settings;

        wp_send_json_success([
            'message'  => __('Youtube Settings Updated', 'wp-social-reviews'),
            'settings' => $settings,
            'postId'   => $postId
        ], 200);
    }

    /**
     * Update template is settings is changed in editor
     *
     * @return json
     * @since 1.2.5
     */
    public function updateEditorSettings($settings = [], $postId = null)
    {
        if(defined('WPSOCIALREVIEWS_PRO') && class_exists('\WPSocialReviewsPro\App\Services\TemplateCssHandler')){
            (new \WPSocialReviewsPro\App\Services\TemplateCssHandler())->saveCss($settings, $postId);
        }

        // Remove template from onboarding sessions since it's now been edited
        if (Arr::get($settings, 'feed_settings.created_from_onboarding')) {
            OnboardingHelper::removeFromOnboardingSessions($postId);
        }

        // unset them for wpsr_template_config meta
        $unsetKeys = ['dynamic', 'styles_config', 'styles', 'responsive_styles'];
        foreach ($unsetKeys as $key){
            if(Arr::get($settings, $key, false)){
                unset($settings[$key]);
            }
        }

        $encodedMeta = json_encode($settings, JSON_UNESCAPED_UNICODE);
        update_post_meta($postId, '_wpsr_template_config', $encodedMeta);
        wp_send_json_success([
            'message' => __('Template Saved Successfully!!', 'wp-social-reviews'),
        ], 200);
    }

    /**
     * Handle Api key or token
     **
     * @return string|array
     * @since 1.2.5
     */
    public function getApiKeyOrToken()
    {
        $apiCredentials       = get_option('wpsr_youtube_verification_configs', true);
        $youtubeApiKeyOrToken = '';
        $youtubeAccessToken   = '';
        $youtubeApiKey        = '';

        if (isset($apiCredentials['credentials_type']) && $apiCredentials['credentials_type'] === 'oauth2.0') {
            $youtubeAccessToken = $this->oauth->getAccessToken();
            if (!$youtubeAccessToken) {
                return ['error_message' => __('Error in API key settings,Please check your API key is valid or not.', 'wp-social-reviews')];
            }
        } elseif (isset($apiCredentials['credentials_type']) && $apiCredentials['credentials_type'] === 'api_key') {
            $youtubeApiKey = $apiCredentials['api_key'];
        } elseif (isset($apiCredentials['credentials_type']) && $apiCredentials['credentials_type'] === 'manually_connect') {
            $youtubeAccessToken = $apiCredentials['access_token'];
        }

        if (!empty($youtubeAccessToken) && empty($youtubeApiKey)) {
            $youtubeApiKeyOrToken = 'access_token=' . $youtubeAccessToken . '';
        } else {
            $youtubeApiKeyOrToken = 'key=' . $youtubeApiKey . '';
        }

        if (!$youtubeAccessToken && !$youtubeApiKey) {
            return ['error_message' => __('No credential found. Please configure your YouTube settings correctly.', 'wp-social-reviews')];
        }

        return $youtubeApiKeyOrToken;
    }

    public function getApiDetails($channelId, $playlistId, $feedType, $eventType, $searchTerm, $total)
    {
        if ($feedType === 'channel_feed') {
            return $this->getChannelApiUrlDetails($channelId, $total, $feedType);
        } elseif ($feedType === 'playlist_feed') {
            return apply_filters('wpsocialreviews/youtube_playlist_api_url_details', $playlistId, $total, $this->remoteFetchUrl);
        } elseif ($feedType === 'search_feed') {
            return apply_filters('wpsocialreviews/youtube_search_api_url_details', $searchTerm, $total, $this->remoteFetchUrl);
        } elseif ($feedType === 'live_streams_feed') {
            return apply_filters('wpsocialreviews/youtube_live_streams_api_url_details', $channelId, $eventType, $total, $this->remoteFetchUrl);
        }
    }

    /**
     * Handle YouTube Api Connection
     *
     * Collect youtube data from api
     *
     * @param $apiSettings
     * @param $postId
     *
     * @return array
     * @since 1.2.5
     */
    public function apiConnection($apiSettings = [], $postId = null)
    {
        $total    = (int)Arr::get($apiSettings, 'feed_count', '50');
        $feedType = Arr::get($apiSettings, 'feed_type', 'channel_feed');
        $channelId  = Arr::get($apiSettings, 'channel_id', '');
        $playlistId = Arr::get($apiSettings, 'playlist_id', '');
        $searchTerm = Arr::get($apiSettings, 'search_term', '');
        $videoIds   = Arr::get($apiSettings, 'video_id', '');
        $eventType  = Arr::get($apiSettings, 'event_type', '');

        if (empty($channelId) && empty($playlistId) && empty($searchTerm) && empty($videoIds)) {
            $position = strpos($feedType, '_');
            $type     = substr($feedType, 0, $position);
            $type     = (($type === 'live') ? 'channel' : (($type === 'single') ? 'single videos' : $type));
            $suffix   = $feedType === 'search_feed' ? 'term' : 'id';
            // translators: Please retain the placeholders (%s, %d, etc.) and ensure they are correctly used in context.
            return ['error_message' => sprintf(__('Please enter %1$s %2$s to fetch videos!!', 'wp-social-reviews'), $type, $suffix)];
        }

        if (!defined('WPSOCIALREVIEWS_PRO') && $feedType !== 'channel_feed') {
            return ['error_message' => __('Please upgrade to pro version to use this features!! ', 'wp-social-reviews')];
        }

        if ($feedType === 'single_video') {
            $videoIds      = array_map('trim', explode(",", $videoIds));
            $feedCacheName = 'single_video_feed_id_' . $postId . '_num_' . count($videoIds);

            return $this->getSingleVideoFeeds($videoIds, $feedCacheName);
        }

        //without single video feed we have now api url for fetching videos
        return $this->getYoutubeFeed($channelId, $playlistId, $feedType, $eventType, $searchTerm, $total, true);
    }

    public function sendApiRequest($youtubeFeedApiUrl, $feedType)
    {
        $youtubeApiKeyOrToken = $this->getApiKeyOrToken();
        if (isset($youtubeApiKeyOrToken['error_message'])) {
            return ['error_message' => $youtubeApiKeyOrToken];
        }

        $args     = array(
            'timeout'   => 60
        );
        $feeds = $this->getAPIData($youtubeFeedApiUrl . $youtubeApiKeyOrToken, $args);
        if (is_wp_error($feeds)) {
            $message = $feeds->get_error_message();
            return ['error_message' => $message];
        }

        if (isset($feeds['error']['message'])) {
            $error = $feeds['error']['message'];
            return ['error_message' => $error];
        }

        //we are storing video ids for using in videos api with comma separator
        $videoIds = $this->getVideoIds($feeds);
        $nextPageToken = Arr::get($feeds, 'nextPageToken', '');

        if (is_array($videoIds)) {
            $videoIds = array_map('strval', array_filter($videoIds, 'is_scalar'));
            $videoIds = implode(',', $videoIds);
        }

        $parts = 'id,snippet,status';
        $parts = apply_filters('wpsocialreviews/youtube_api_parts', $parts, $feedType);

        $youtubeUrl = $this->remoteFetchUrl . 'videos?part=' . $parts . '&id=' . $videoIds . '&';
        $videoLists = [];
        $response   = wp_remote_get($youtubeUrl . $youtubeApiKeyOrToken);

        if (is_wp_error($response)) {
            $message = $response->get_error_message();

            return ['error_message' => $message];
        }

        if (!is_wp_error($response)) {
            $videoLists = json_decode(wp_remote_retrieve_body($response), true);

            $errors     = $this->checkYoutubeError($videoLists);
            if (is_array($errors) && (true === $errors[0] || 1 === $errors[0])) {
                return ['error_message' => isset($errors[1]) ? $errors[1] : __('Problem in api key or access token setting!!', 'wp-social-reviews')];
            }

            // unlisted videos remove
            $videoLists = $this->getPublishVideos($videoLists);
        }

        $videoLists['nextPageToken'] = $nextPageToken;

        return $videoLists;
    }

    /**
     * Retrieve 'published' status videos from different statuses videos.
     *
     * @return array
     * @throws /Exception
     * @since 1.2.5
     */
    public function getPublishVideos($videoList)
    {
        $videos = Arr::get($videoList, 'items' , []);
        foreach($videos as $index => $video)
        {
            $videoStatus = Arr::get($video['status'], 'privacyStatus', '');
            if($videoStatus == 'unlisted')
            {
                unset($videoList['items'][$index]);
            }
        }

        return $videoList;
    }

    /**
     * Youtube Feeds Without Single Video
     *
     * @return array
     * @throws /Exception
     * @since 1.2.5
     */
    public function getYoutubeFeed($channelId = '', $playlistId = '', $feedType = 'channel_feed', $eventType = '', $searchTerm = '', $total = 50, $hasCache = false)
    {
        $errorCacheName = 'yt_'.$feedType.'_'. $this->postId . '_error';
        // Check if we have a cached error
        if($this->postId && $errorCacheName){
            // Then check if we have a cached error
            $errorCache = $this->cacheHandler->getFeedCache($errorCacheName);
            if ($errorCache && isset($errorCache['error_message'])) {
                // Return the cached error without making an API call
                return $errorCache;
            }
        }

        $apiDetails = $this->getApiDetails($channelId, $playlistId, $feedType, $eventType, $searchTerm, $total);

        if (isset($apiDetails['error_message'])) {
            if($this->postId){
                // Store the error in cache to prevent repeated API calls
                $this->cacheHandler->createCache($errorCacheName, $apiDetails);
            }
            return $apiDetails;
        }

        $youtubeFeedApiUrl = Arr::get($apiDetails, 'api_url');
        $feedCacheName     = Arr::get($apiDetails, 'cache_name');

        if(empty($youtubeFeedApiUrl)) {
            return ['error_message' => __('No videos found. Make sure this is a valid channel ID and that the channel has videos available on YouTube.', 'wp-social-reviews')];
        }

        if ($youtubeFeedApiUrl) {
            //add max results params in api from here in each call
            $videoLists = [];
            if($hasCache) {
                $videoLists = $this->cacheHandler->getFeedCache($feedCacheName);
            }

            if(isset($videoLists['items']) && empty($videoLists['items'])){
                return ['error_message' => __('No videos found. Please make sure the provided input is correct and the content is publicly available on YouTube.', 'wp-social-reviews')];
            }

            if (empty($videoLists)) {
                $total = min($total, 200);
                $pages = (int)($total/50);
                $pages += (int)(($total%50) > 0);

                $currPage = 1;
                $curTotal = min($total, 50);
                $videoLists = $this->sendApiRequest($youtubeFeedApiUrl.'maxResults='.$curTotal.'&', $feedType);
                $nextPageToken = Arr::get($videoLists, 'nextPageToken');
                while($currPage < $pages && !empty($nextPageToken)) {
                    $curTotal = min($total-(50*$currPage), 50);
                    $currYtFeedApiUrl = $youtubeFeedApiUrl . 'maxResults=' . $curTotal . '&pageToken=' . $nextPageToken . '&';
                    $feeds = $this->sendApiRequest($currYtFeedApiUrl, $feedType);
                    $nextPageToken = Arr::get($feeds, 'nextPageToken');
                    $videoLists['items'] = array_merge(Arr::get($videoLists, 'items', []), Arr::get($feeds, 'items', []));
                    $currPage++;
                }

                // Sanitize user-generated content before caching
                $videoLists = $this->sanitizeFeedItems($videoLists);

                $this->cacheHandler->createCache($feedCacheName, $videoLists);
            }

            if ($feedType === 'playlist_feed' && isset($videoLists['items']) && count($videoLists['items'])) {
                foreach ($videoLists['items'] as $video) {
                    if (isset($video['snippet']['channelId'])) {
                        $channelId = $video['snippet']['channelId'];
                        break;
                    }
                }
            }

            $channelCacheName = 'channel_header_' . $channelId;
            $channelInfo = [];
            if($hasCache) {
                $channelInfo = $this->cacheHandler->getFeedCache($channelCacheName);
            }

            if (empty($channelInfo)) {
                $channelInfo = $this->getChannelInfo($feedType, $videoLists, $channelId);
            }

            $videoLists['header'] = $channelInfo;

            return $videoLists;
        }
    }

    /**
     * Youtube Single Video Feeds
     *
     * @param array $videoIds video ids
     *
     * @return array
     * @throws /Exception
     * @since 1.2.5
     */
    public function getSingleVideoFeeds($videoIds, $feedCacheName)
    {
        if (empty($videoIds)) {
            return ['error_message' => __('Please enter a video id!! ', 'wp-social-reviews')];
        }

        $videoLists = [];
        $parts      = 'id,snippet';
        $parts      = apply_filters('wpsocialreviews/youtube_api_parts', $parts, 'single_video');

	    $videoLists = $this->cacheHandler->getFeedCache($feedCacheName);

        if(isset($videoLists['items']) && empty($videoLists['items'])){
            return ['error_message' => __('No videos found. Please make sure the provided input is correct and the content is publicly available on YouTube.', 'wp-social-reviews')];
        }

        //No need to api call for this if data all ready exists in cache
        if (!$videoLists) {
            $youtubeApiKeyOrToken = $this->getApiKeyOrToken();
            if (isset($youtubeApiKeyOrToken['error_message'])) {
                return ['error_message' => $youtubeApiKeyOrToken];
            }

            $videoIds           = implode(',', $videoIds);
            $channelVideoApiUrl = $this->remoteFetchUrl . 'videos?part=' . $parts . '&id=' . $videoIds . '&';
            $videoLists         = $this->checkYoutubeCache($channelVideoApiUrl, $feedCacheName, 'single_video');

            // Sanitize user-generated content
            $videoLists = $this->sanitizeFeedItems($videoLists);
        }

        $videoLists['header'] = '';

        return $videoLists;
    }

    /**
     * Youtube Channel Api Url Details
     *
     * @param string $channelId Channel ID
     * @param integer $total total
     *
     * @return array
     * @throws /Exception
     * @since 1.2.5
     */
    public function getChannelApiUrlDetails($channelIdentifier, $total, $feedType = '')
    {
        $feedCacheName     = '';
        $youtubeFeedApiUrl = '';
        if (empty($channelIdentifier)) {
            return ['error_message' => __('Please enter Channel ID, Username or Handle to fetch videos!!', 'wp-social-reviews')];
        }

        // Determine the identifier type and build appropriate parameters
        $channelApiParams = $this->determineChannelIdentifierType($channelIdentifier);

        if (isset($channelApiParams['error_message'])) {
            return $channelApiParams;
        }

        $channelCacheName     = 'channel_header_' . $channelIdentifier;
        $youtubeChannelApiUrl = $this->remoteFetchUrl . 'channels?part=id,snippet,contentDetails,statistics,brandingSettings&maxResults=' . $total . '&' . $channelApiParams . '&';
        $videos               = $this->checkYoutubeCache($youtubeChannelApiUrl, $channelCacheName, $feedType);

        if(Arr::get($videos, 'error_message')){
            return ['error_message' => $videos['error_message']];
        }

        $resultSet = isset($videos['pageInfo']['resultsPerPage']) ? $videos['pageInfo']['resultsPerPage'] : 0;
        if (!$resultSet) {
            return ['error_message' => __('Can\'t find any videos to the channel!!', 'wp-social-reviews')];
        }
        $playlist = isset($videos['items'][0]['contentDetails']['relatedPlaylists']['uploads']) ? $videos['items'][0]['contentDetails']['relatedPlaylists']['uploads'] : '';
        if ($playlist) {
            $feedCacheName     = 'channel_feed_id_' . $channelIdentifier . '_num_' . $total;
            $youtubeFeedApiUrl = $this->remoteFetchUrl . 'playlistItems?part=id,snippet&playlistId=' . $playlist . '&';
        }

        return [
            'cache_name' => $feedCacheName,
            'api_url'    => $youtubeFeedApiUrl
        ];
    }

    /**
     * Determine the type of channel identifier and return appropriate API parameters
     *
     * @param string $identifier
     * @return string|array Array with error message on invalid input
     */
    private function determineChannelIdentifierType($identifier)
    {
        // Trim whitespace from the identifier
        $identifier = trim($identifier);

        // Check if identifier is empty after trimming
        if (empty($identifier)) {
            return [
                'error_message' => __('Channel identifier cannot be empty. Please enter a valid Channel ID, Username, or Handle', 'wp-social-reviews')
            ];
        }

        // Handle validation for YouTube handles (starting with @)
        if (strpos($identifier, '@') === 0) {
            $handle = ltrim($identifier ?? '', '@');
            // Validate: @ followed by 3–30 valid characters
            if (!preg_match('/^(?![_\-.·])[a-zA-Z0-9_\-\.·]{3,30}(?<![_\-.·])$/u', $handle)) {
                return [
                    'error_message' => __('Invalid YouTube handle format. Handles should be 3-30 characters and contain only letters, numbers, underscores, and periods.', 'wp-social-reviews')
                ];
            }

            return 'forHandle=' . $handle;
        }

        // Channel ID validation (UC followed by 22 characters)
        if (strpos($identifier, 'UC') === 0) {
            // Strict validation for channel ID format
            if (!preg_match('/^UC[a-zA-Z0-9_-]{22}$/', $identifier)) {
                return [
                    'error_message' => __('Invalid Channel ID format. YouTube Channel IDs start with "UC" followed by 22 characters.', 'wp-social-reviews')
                ];
            }

            return 'id=' . $identifier;
        }

        // Username validation (3-30 characters, alphanumeric, underscores, periods, hyphens)
        if (preg_match('/^[a-zA-Z0-9._-]{3,30}$/', $identifier)) {
            return 'forUsername=' . $identifier;
        }

        // If we reach here, the identifier doesn't match any valid format
        return [
            'error_message' => __('Invalid channel identifier. Please enter a valid Channel ID, Username, or Handle', 'wp-social-reviews')
        ];
    }

    /**
     * This function will set the API url and fetch the YouTube API Data
     *
     * @param string $fetchUrl
     * @param array $args
     *
     * @return json
     * @since 1.2.5
     */
    public function getAPIData($fetchUrl = '', $args = [])
    {
        $response = wp_remote_get($fetchUrl, $args);

        if (is_wp_error($response)) {
            return $response;
        }
        if (!is_wp_error($response)) {
            $response = json_decode(wp_remote_retrieve_body($response), true);
        }

        return $response;
    }

    public function getChannelInfo($feedType, $videoLists, $channelId)
    {
        if ($feedType === 'search_feed' || $feedType === 'single_video_feed') {
            return;
        }

        $youtubeApiKeyOrToken = $this->getApiKeyOrToken();
        if (isset($youtubeApiKeyOrToken['error_message'])) {
            return ['error_message' => $youtubeApiKeyOrToken];
        }

        $feedTypes = ['playlist_feed', 'channel_feed', 'live_streams_feed'];
        if (!empty($channelId) && in_array($feedType, $feedTypes)) {
            if($feedType === 'live_streams_feed') {
                $channelId = Arr::get($videoLists, 'items.0.snippet.channelId', '');
            }

            $channelApiParams = $this->determineChannelIdentifierType($channelId);
            if (isset($channelApiParams['error_message'])) {
                return $channelApiParams;
            }

            $channelCacheName = 'channel_header_' . $channelId;
            $youtubeChannelApiUrl = $this->remoteFetchUrl . 'channels?part=id,snippet,contentDetails,statistics,brandingSettings&maxResults=1&' . $channelApiParams . '&';
            $response             = wp_remote_get($youtubeChannelApiUrl . $youtubeApiKeyOrToken);

            if (is_wp_error($response)) {
                $message = $response->get_error_message();
                return ['error_message' => $message];
            }
            if (!is_wp_error($response)) {
                $channelInfo = json_decode(wp_remote_retrieve_body($response), true);
                $errors      = $this->checkYoutubeError($channelInfo);

                if (is_array($errors) && (true === $errors[0] || 1 === $errors[0])) {
                    return ['error_message' => isset($errors[1]) ? $errors[1] : __('Problem in api key or access token setting!!', 'wp-social-reviews')];
                } else {
                    $this->cacheHandler->createCache($channelCacheName, $channelInfo);
                    return $channelInfo;
                }
            }
        }
    }

    public function getVideoIds($feeds = [])
    {
        $videoIds = [];
        if (isset($feeds['items']) && count($feeds['items'])) {
            foreach ($feeds['items'] as $index => $feed) {
                $videoId = Helper::getVideoId($feed);
                if (!empty($videoId)) {
                    $videoIds[] = $videoId;
                }
            }
        }

        return $videoIds;
    }

    /**
     * Handle Error
     *
     * Check if there any error in youtube api data
     *
     * @param array $feedData feed data
     *
     * @return array
     * @throws /Exception
     * @since 1.2.5
     */
    public function checkYoutubeError($feedData)
    {
        try {
            if (isset($feedData['error']) && 400 === $feedData['error']['code']) {
                throw new \Exception($feedData['error']['code'] . ' - A VALID access token is required to request this resource.');
            }
            if (isset($feedData['error'])) {
                $output = '';
                if (isset($feedData['error']['message'])) {
                    $output = 'Error: ' . $feedData['error']['message'];
                }
                if (isset($feedData['error']['code'])) {
                    $output .= '<br />Code: ' . $feedData['error']['code'];
                }
                throw new \Exception($output);
            }
        } catch (\Exception $e) {
            return [true, $e->getMessage()];
        }
    }

    /**
     * Handle YouTube Cache
     *
     * @param string $youtubeUrl youtube url
     * @param string $cacheName cache name
     *
     * @return array|string
     * @throws /Exception
     * @since 1.2.5
     */
    public function checkYoutubeCache($youtubeUrl, $cacheName, $feedType = '')
    {
		$feedCache = $this->cacheHandler->getFeedCache($cacheName);

        if ($feedCache) {
            return $feedCache;
        }

//        $errorCacheName = '';
//        if($feedType){
//            $errorCacheName = 'yt_'.$feedType.'_'. $this->postId . '_error';
//        }
//
//        // Check if we have a cached error
//        if($this->postId && $errorCacheName){
//            // Then check if we have a cached error
//            $errorCache = $this->cacheHandler->getFeedCache($errorCacheName);
//            if ($errorCache && isset($errorCache['error_message'])) {
//                // Return the cached error without making an API call
//                return $errorCache;
//            }
//        }

        $youtubeApiKeyOrToken = $this->getApiKeyOrToken();
        if (isset($youtubeApiKeyOrToken['error_message'])) {
	        return ['error_message' => $youtubeApiKeyOrToken['error_message']];
        }

        $feedData = [];
        $response = wp_remote_get($youtubeUrl . $youtubeApiKeyOrToken);

        if (is_wp_error($response)) {
            $message = $response->get_error_message();

            return ['error_message' => $message];
        }

        if (!is_wp_error($response)) {
            $feedData = json_decode(wp_remote_retrieve_body($response), true);
        }

        if (!empty($feedData) && !empty($cacheName)) {
            $wpsr_error_check_complete = $this->checkYoutubeError($feedData);
            if (is_array($wpsr_error_check_complete) && (true === $wpsr_error_check_complete[0] || 1 === $wpsr_error_check_complete[0])) {
	            $feedCache = $this->cacheHandler->getFeedCache($cacheName);
				if ($feedCache) {
                    return $feedCache;
                }

                return ['error_message' => isset($wpsr_error_check_complete[1]) ? $wpsr_error_check_complete[1] : __('Problem in api key or access token setting!!', 'wp-social-reviews')];
            } elseif (!$this->cacheHandler->getFeedCache($cacheName)) {
                $this->cacheHandler->createCache($cacheName, $feedData);
                return $feedData;
            }
        } else {
            if (!empty($cacheName) && empty($feedData)) {
	            $feedCache = $this->cacheHandler->getFeedCache($cacheName);
                if ($feedCache) {
                    return $this->cacheHandler->getFeedCache($cacheName, true);
                }
            }
        }
    }

    public function updateCachedFeeds($caches)
    {
        foreach ($caches as $index => $cache) {
            $optionName = $cache['option_name'];
            $event_type = '';
            $searchTerm = '';
            $feed_type  = '';
            $channelId  = '';
            $playlistId = '';
            $num_position = strpos($optionName, '_num_');

            //search term
            $search_term_position = strpos($optionName, '_search_term_');
            if ($search_term_position) {
                $searchTerm = substr($optionName, $search_term_position + strlen('_search_term_'),
                    $num_position - ($search_term_position + strlen('_search_term_')));
            }

            //find total
            $total = substr($optionName, $num_position + strlen('_num_'),
                strlen($optionName) - ($num_position + strlen('_num_')));

            //find id
            $id_position = strpos($optionName, '_id_');
            $id          = substr($optionName, $id_position + strlen('_id_'),
                $num_position - ($id_position + strlen('_id_')));

            //feed type
            $separator        = '_feed';
            $feed_position    = strpos($optionName, $separator) + strlen($separator);
            $initial_position = 0;
            if ($feed_position) {
                $feed_type = substr($optionName, $initial_position, $feed_position - $initial_position);
            }

            if ($feed_type === 'live_streams_feed') {
                $event_type_position = strpos($optionName, '_event_type_');
                $event_type          = substr($optionName, $event_type_position + strlen('_event_type_'),
                    strlen($optionName) - ($event_type_position + strlen('_event_type_')));
                $total               = substr($optionName, $num_position + strlen('_num_'),
                    $event_type_position - ($num_position + strlen('_num_')));
            }

            $total = (int)$total;
            $feedTypes = ['channel_feed', 'playlist_feed', 'single_video_feed', 'search_feed', 'live_streams_feed'];
            if (in_array($feed_type, $feedTypes)) {
                if ($feed_type === 'single_video_feed' && !empty($id)) {
                    $feed_meta     = get_post_meta($id, '_wpsr_template_config', true);
                    $decodedMeta   = json_decode($feed_meta, true);
                    $feed_settings = Arr::get($decodedMeta, 'feed_settings', []);
                    $template_meta = Config::formatYoutubeConfig($feed_settings, []);
                    $videoIds      = $template_meta['feed_settings']['source_settings']['video_id'];
                    $videoIds      = array_map('trim', explode(",", $videoIds));
                    $feedCacheName = 'single_video_feed_id_' . $id . '_num_' . count($videoIds);
                    $this->getSingleVideoFeeds($videoIds, $feedCacheName);
                } else {
                    if ($feed_type === 'channel_feed' || $feed_type == 'live_streams_feed') {
                        $channelId  = $id;
                    } elseif ($feed_type === 'playlist_feed') {
                        $playlistId = $id;
                    }

                    $this->getYoutubeFeed($channelId, $playlistId, $feed_type, $event_type, $searchTerm, $total);
                }
            }
        }
    }

    /**
     * Sanitize user-generated content in YouTube feed items
     *
     * @param array $videoLists Array of video feed data
     * @return array Sanitized video feed data
     */
    public function sanitizeFeedItems($videoLists)
    {
        if (!isset($videoLists['items']) || !is_array($videoLists['items'])) {
            return $videoLists;
        }

        foreach ($videoLists['items'] as &$item) {
            // Sanitize video title
            if (isset($item['snippet']['title'])) {
                $item['snippet']['title'] = GlobalHelper::sanitizeForStorage($item['snippet']['title']);
            }

            // Sanitize video description
            if (isset($item['snippet']['description'])) {
                $item['snippet']['description'] = GlobalHelper::sanitizeForStorage($item['snippet']['description']);
            }
        }
        unset($item);

        return $videoLists;
    }

    public function clearCache()
    {
        $this->cacheHandler->clearCache();
        wp_send_json_success([
            'message' => __('Cache cleared successfully!', 'wp-social-reviews'),
        ], 200);
    }
}
