<?php
    defined('BASEPATH') OR exit('No direct script access allowed');

    class Posts extends MY_Controller
    {

        public function __construct()
        {
            parent::__construct('profile', 'language_names', 'country_names');
            $this->load->model('UserModel', '', TRUE);
            $this->load->model('PostsModel', '', TRUE);
        }

        public function index()
        {
            if (isset($_SESSION['user']) && !empty($_SESSION['user']))
                redirect(base_url('posts/feed'));
            redirect(base_url('posts/popular'));
        }

        public function feed()
        {
            if (!isset($_SESSION['user']) || empty($_SESSION['user']))
                redirect(base_url('posts'));

            $this->load->view('header', ['active' => 'feed', 'title' => 'Dein Feed', 'additionalStyles' => ['posts_list.css']]);
            $this->load->view('network/posts/posts_list', ['active', 'feed']);
            $this->load->view('footer', ['additionalScripts' => ['post_feed.js', 'post_search.js']]);
        }

        public function getFeedPosts()
        {
            if (!isset($_SESSION['user']) || empty($_SESSION['user']))
                redirect(base_url('posts'));

            $amount = (int)$this->input->get('amount');
            $offset = (int)$this->input->get('offset') * $amount;
            $posts = $this->PostsModel->getFeedPosts($_SESSION['user']['ID'], $amount, $offset);

            foreach ($posts as $post) {
                $this->load->view('network/posts/post_item', $post);
            }
        }

        public function popular()
        {
            $this->load->view('header', ['active' => 'popular', 'title' => 'Beliebte Posts', 'additionalStyles' => ['posts_list.css']]);
            $this->load->view('network/posts/posts_list', ['active' => 'popular']);
            $this->load->view('footer', ['additionalScripts' => ['post_feed.js', 'post_search.js']]);
        }

        public function getPopularPosts()
        {
            $amount = (int)$this->input->get('amount');
            $offset = (int)$this->input->get('offset') * $amount;
            $posts = $this->PostsModel->getPopularPosts($amount, $offset);

            foreach ($posts as $post) {
                $this->load->view('network/posts/post_item', $post);
            }
        }

        public function addPostLike()
        {
            header('Content-Type: application/json');
            if (!isset($_SESSION['user']) || empty($_SESSION['user'])) {
                echo json_encode([
                    'success' => false,
                    'message' => lang('post_like_account_missing')
                ]);
                exit;
            }

            $postUUID = $this->input->post('postUUID');

            $isLiked = $this->PostsModel->addPostLikeByUUID($postUUID, $_SESSION['user']['ID']);
            $likeCount = $this->PostsModel->getPostLikeCountByUUID($postUUID);

            echo json_encode([
                'success' => true,
                'message' => 'Du hast den Post erfolgreich bewertet.',
                'isLiked' => $isLiked,
                'likeCount' => $likeCount
            ]);
        }

        public function search()
        {
            $type = $this->input->get('type');
            $query = $this->input->get('q');
            $rank = $this->input->get('rank');

            $this->load->view('header', ['active' => 'search', 'title' => 'Suche', 'additionalStyles' => ['posts_list.css']]);
            $this->load->view('network/posts/posts_list', ['active' => 'search', 'search' => ['query' => $query, 'type' => $type, 'rank' => $rank]]);
            $this->load->view('footer', ['additionalScripts' => ['post_search.js']]);
        }

        public function getSearchPosts()
        {
            $type = $this->input->get('type');
            $query = $this->input->get('query');
            $rank = $type == 'type-users' ? $this->input->get('rank') : '';
            $lang = $type == 'type-users' ? $this->input->get('lang') : '';
            $country = $type == 'type-users' ? $this->input->get('country') : '';
            $amount = (int)$this->input->get('amount');
            $offset = (int)$this->input->get('offset') * $amount;

            if ($type !== 'type-users' && $rank !== '' && $lang !== '' && strlen($query) < 4) {
                exit;
            }

            if (($type == 'type-all' && $offset == 0) || $type == 'type-users') {
                $userAmount = $type == 'type-users' ? $amount : 3;
                $userOffset = $type == 'type-users' ? $offset : 0;
                $users = $this->UserModel->searchUsers($query, $rank, $country, $lang, $userAmount, $userOffset);

                if (!empty($users)) {
                    if($offset == 0) {
                        echo '<h2>Nutzer (' . sizeof($users) . ')</h2>';
                    }

                    echo '<div class="row">';
                    foreach ($users as $user) {
                        $user['about'] = strlen($user['about']) > 60 ? substr($user['about'], 0, 60) . '...' : $user['about'];

                        echo $this->load->view('network/user/user_overview_card', $user, true);
                    }
                    echo '</div>';
                }
            }

            if ($type == 'type-all' || $type == 'type-posts') {
                $posts = $this->PostsModel->searchPosts($query, $amount, $offset);

                if (!empty($posts) && $offset == 0) {
                    echo '<h2>Posts</h2>';
                }

                foreach ($posts as $post) {
                    $this->load->view('network/posts/post_item', $post);
                }
            }
        }

        public function getAvailableCountries() {
            $countries = $this->UserModel->getAvailableCountries();

            foreach ($countries as $i => $country) {
                $countries[$i]['name'] = lang('country_' . $country['country']);
            }

            header('Content-Type: application/json');
            echo json_encode(['countries' => $countries]);
        }

        public function getAvailableLanguages() {
            $languages = $this->UserModel->getAvailableLanguages();

            foreach ($languages as $i => $language) {
                $languages[$i]['name'] = lang('lang_' . strtolower($language['language']));
            }

            header('Content-Type: application/json');
            echo json_encode(['languages' => $languages]);
        }

        public function getReportModal() {
            $this->load->view('network/posts/report_modal');
        }

        public function reportPost() {
            header('Content-Type: application/json');
            $uuid = $this->input->post('uuid');
            $reason = $this->input->post('reason');
            $reasonText = $this->input->post('explanation');

            if($reason == '') {
                echo json_encode(['success' => false, 'message' => 'Bitte wähle einen Grund für deine Meldung aus.']);
                exit;
            }

            $allowedReasons = ['hatespeech', 'racism', 'terrorism', 'abuse', 'violence', 'copyright', 'spam', 'technical-issue'];

            if(!array_search($reason, $allowedReasons)) {
                echo json_encode(['success' => false, 'message' => 'Bitte wähle einen standardmäßig vorhandenen und validen Grund für die Meldung aus.']);
                exit;
            }

            if(!$this->PostsModel->isUUIDValid($uuid)) {
                echo json_encode(['success' => true, 'message' => 'Der ausgewählte Post ist nicht (mehr) vorhanden. Sollte es sich hierbei um ein Irrtum handeln, verfasse bitte über den Button unten rechts ein Feedback.']);
                exit;
            }

            $this->PostsModel->reportPost($uuid, $reason, $reasonText);

            echo json_encode(['success' => true, 'message' => 'Vielen Dank für das Melden dieses Posts. Wir werden schnellstmöglich angemessene Aktionen unternehmen.']);
        }

        public function getDeleteModal() {
            header('Content-Type: application/json');
            if(!isset($_SESSION['user'])) {
                echo json_encode(['success' => false, 'message' => 'Du musst eingeloggt sein, um die Posts deines Accounts zu löschen']);
                exit;
            }

            $uuid = $this->input->post('uuid');
            $post = $this->PostsModel->getPostByUUID($uuid);

            if(empty($post)) {
                echo json_encode(['success' => false, 'message' => 'Der angegebene Post existiert nicht.']);
                exit;
            }

            if($post[0]['user_id'] != $_SESSION['user']['ID']) {
                echo json_encode(['success' => false, 'message' => 'Du kannst keine Posts löschen, die dir nicht gehören.']);
                exit;
            }

            $post = $this->PostsModel->preparePostList($post);
            $body = $this->load->view('network/posts/delete_modal', ['post' => $post[0]], true);

            echo json_encode(['success' => true, 'title' => 'Post löschen', 'body' => $body]);
        }

        public function deletePost() {
            header('Content-Type: application/json');
            if(!isset($_SESSION['user'])) {
                echo json_encode(['success' => false, 'message' => 'Du musst eingeloggt sein, um die Posts deines Accounts zu löschen']);
                exit;
            }

            $uuid = $this->input->post('uuid');
            $post = $this->PostsModel->getPostByUUID($uuid);

            if(empty($post)) {
                echo json_encode(['success' => false, 'message' => 'Der angegebene Post existiert nicht.']);
                exit;
            }

            if($post[0]['user_id'] != $_SESSION['user']['ID']) {
                echo json_encode(['success' => false, 'message' => 'Du kannst keine Posts löschen, die dir nicht gehören.']);
                exit;
            }

            $this->PostsModel->deletePost($_SESSION['user']['ID'], $uuid);

            echo json_encode(['success' => true, 'message' => 'Der Post wurde erfolgreich gelöscht.']);
        }
    }