<?php

namespace internship\controller;

use internship\bo\Category;
use internship\model\CategoryDao;
use n2n\context\attribute\Inject;
use n2n\web\http\BadRequestException;
use n2n\web\http\controller\ControllerAdapter;
use n2n\web\http\controller\ParamBody;
use n2n\web\http\PageNotFoundException;
use n2n\web\http\StatusException;

/**
 * REST Controller
 * https://dev.n2n.rocks/de/n2n/docs/rest
 */
class CategoryController extends ControllerAdapter {
    #[Inject]
    private CategoryDao $categoryDao;

	function prepare(): void {
		if ($_SERVER['REQUEST_METHOD'] === 'OPTIONS') {
			header('Access-Control-Allow-Origin: *');
			header('Access-Control-Allow-Methods: GET, POST, PUT, DELETE, OPTIONS');
			header('Access-Control-Allow-Headers: Content-Type, Authorization');
			header('Access-Control-Max-Age: 86400'); // cache preflight
			http_response_code(204); // No Content
			exit;
		}
		$this->getResponse()->setHeader("Access-Control-Allow-Headers: X-Requested-With, Content-Type,Accept, Origin");
		$this->getResponse()->setHeader("Access-Control-Allow-Origin: http://localhost:4200");
		$this->getResponse()->setHeader('Access-Control-Allow-Methods: GET, POST, PUT, DELETE, HEAD, OPTIONS');
	}
    /**
     * gibt die {@see Category} mit der entsprechenden id im JSON format zurück.
     *
     * @param int $categoryId
     * @return void
     * @throws PageNotFoundException if the category could not be found.
     */
    function getDoCategory(int $categoryId): void {
        $category = $this->categoryDao->getCategoryById($categoryId);
        if ($category === null) {
            throw new PageNotFoundException('category does not exist');
        }
        $this->sendJson($category,true);
    }

    /**
     * Gibt alle {@see Category} im JSON Format zurück.
     *
     * @return void
     * @throws PageNotFoundException if category could not be found.
     */
    function getDoCategories(): void {
        $categories = $this->categoryDao->getCategories();
        $this->sendJson($categories);
    }

    /**
     * Speichere eine {@see Category}.
     *
     * @param ParamBody $body
     * @throws StatusException
     * @throws BadRequestException if category is not 'Travel', 'Health' oder 'Finance'
     */

    function postDoCategory(ParamBody $body) :void {
        $httpData = $body->parseJsonToHttpData();
        $text = $httpData->reqString('text');
        $categoryName = $httpData->reqString('category_name');

        $uniqueCategories = $this->categoryDao->getCategories();
        $uniqueCategoryNames = array_column($uniqueCategories,'name');
        if(in_array($categoryName,$uniqueCategoryNames)) {
            throw new BadRequestException('Category Name already exists');
        }

        $category = new Category();
        $category->setName($categoryName);
        $category->setText($text);

        if ($category->getName() != 'Travel'
                && $category->getName() != 'Finance'
                && $category->getName() != 'Health') {
            throw new BadRequestException('Category name not supported.');
        }

        $this->beginTransaction();
        $this->categoryDao->saveCategory($category);
        $this->commit();
        echo 'Category saved successfully';
    }

    /**
     * Editiere eine {@see Category}.
     *
     * @param int $categoryId
     * @param ParamBody $body
     * @throws BadRequestException if category is not 'Travel', 'Health' oder 'Finance'
     * @throws StatusException
     */

    function putDoCategory(int $categoryId, ParamBody $body): void {
        $httpData = $body->parseJsonToHttpData();

        $name = $httpData->optString('category_name');
        $text = $httpData->optString('text');
        $category = $this->categoryDao->getCategoryById($categoryId);

        if($category === null) {
            throw new BadRequestException('The category you are trying to edit does not exist!');
        }

        if ($category->getName() != 'Travel'
            && $category->getName() != 'Finance'
            && $category->getName() != 'Health') {
            throw new BadRequestException('Category name not supported');
        }

        if ($name) {
            $category->setName($name);
        }
        if ($text) {
            $category->setText($text);
        }

        $this->beginTransaction();
        $this->categoryDao->saveCategory($category);
        $this->commit();
        echo 'category saved successfully.';
    }

    /**
     * Löscht die {@see Category} mit der dazugehörigen Id.
     *
     * @return void
     * @throws PageNotFoundException if the category does not exist
     */
    function deleteDoCategory(int $categoryId): void {
        $category = $this->categoryDao->getCategoryById($categoryId);
        if ($category === null) {
            throw new PageNotFoundException('The category you are trying to delete does not exist.');
        }
        $this->beginTransaction();
        $this->categoryDao->removeCategory($category);
        $this->commit();
        echo 'category with id ' .$categoryId. ' was removed.';
    }
}