<?php
SESSION_START();
require_once '../model/LocalArticleManager.php';
require_once '../model/ArticleManager.php';
require_once '../validator/article-validator.php';

    if ($_SERVER["REQUEST_METHOD"] === "POST") {
        $_SESSION["old_title"]    = $_POST["title"] ?? '';
        $_SESSION["old_content"]  = $_POST["content"] ?? '';
        $_SESSION["old_category"] = $_POST["category"] ?? '';
        $_SESSION["old_tags"]     = $_POST["tags"] ?? '';

        if(!isset($_POST["title"]) ||!isset($_POST["content"]) || !isset($_POST["category"])){
            $_SESSION["message"] = "missing_parameters";
            header("location: ../../index.php?pfad=createArticle");
            exit();
        } else {
            $title = $_POST["title"];
            $content = $_POST["content"];
            $author = $_SESSION["user_email"];
            $category = $_POST["category"];
            $tags = $_POST['tags'] ?? '';

            // -------------------------------- Validierung der Daten: -------------------------
            if (!articleAuthorValidator($author)) {
                $_SESSION["message"] = "author_not_valid";
                header("location: ../../index.php?pfad=createArticle");
                exit();
            }

            if (!articleTitleValidator($title)) {
                $_SESSION["message"] = "invalid_title";
                header("location: ../../index.php?pfad=createArticle");
                exit();
            }

            if (!articleContentValidator($content)) {
                $_SESSION["message"] = "invalid_content";
                header("location: ../../index.php?pfad=createArticle");
                exit();
            }

            if (!articleCategoryValidator($category)) {
                $_SESSION["message"] = "invalid_category";
                header("location: ../../index.php?pfad=createArticle");
                exit();
            }

            if (!articleTagValidator($tags)) {
                $_SESSION["message"] = "invalid_tags";
                header("location: ../../index.php?pfad=createArticle");
                exit();
            } else {
                $cleanedTags = [];
                $rawTags = explode(',', $tags);
                foreach ($rawTags as $rawTag) {
                    // Leerzeichen am Anfang/Ende des einzelnen Tags entfernen:
                    $tag = trim($rawTag);
                    $cleanedTags[] = $tag;
                }
                // Duplikate entfernen:
                $cleanedTags = array_unique($cleanedTags);
                $cleanedTags = implode(',', $cleanedTags);
            }
            // ----------------- Übertragung der validierten Daten in ArticleManager: ---------------------------
            try {
                $articleManager = ArticleManager::getInstance();
                $articleManager->addArticle($title, $content, $author, $category, $cleanedTags);

                // Formulardaten nach erfolgreichem Erstellen aus der Session löschen
                unset($_SESSION["old_title"], $_SESSION["old_content"], $_SESSION["old_category"], $_SESSION["old_tags"]);

            } catch (Exception $e){
                $_SESSION["message"] = "internal_error";
                header("location: ../../index.php?pfad=createArticle");
                exit();
            }

            $_SESSION["message"] = "new_article";
            // Weiterleitung zur Homepage
            header("location: ../../index.php");
            exit();
        }
    }


?>