<?php

namespace App\Controller;

use App\Entity\Goal;
use App\Entity\User;
use App\Repository\GoalRepository;
use Doctrine\ORM\EntityManagerInterface;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Attribute\Route;

#[Route('/api/goals')]
class GoalController extends AbstractController
{
    public function __construct(
        private readonly EntityManagerInterface $em,
        private readonly GoalRepository $goals,
    ) {}

    #[Route('', methods: ['GET'])]
    public function list(): JsonResponse
    {
        $user = $this->getUser();
        if (!$user instanceof User) {
            return new JsonResponse(['error' => 'Unauthorized'], Response::HTTP_UNAUTHORIZED);
        }
        $goals = array_map(fn(Goal $g) => $g->toArray(), $this->goals->findByUser($user->getId()));
        return new JsonResponse($goals);
    }

    #[Route('', methods: ['POST'])]
    public function create(Request $request): JsonResponse
    {
        $user = $this->getUser();
        if (!$user instanceof User) {
            return new JsonResponse(['error' => 'Unauthorized'], Response::HTTP_UNAUTHORIZED);
        }

        $data = json_decode($request->getContent(), true) ?? [];
        $name = trim($data['name'] ?? '');
        if (!$name) {
            return new JsonResponse(['error' => 'Name fehlt'], Response::HTTP_BAD_REQUEST);
        }

        try {
            $start = new \DateTime($data['start'] ?? 'now');
        } catch (\Exception) {
            $start = new \DateTime();
        }

        $goal = new Goal();
        $goal->setUserId($user->getId())
             ->setName($name)
             ->setUnit(trim($data['unit'] ?? 'Stück') ?: 'Stück')
             ->setDaily((float)($data['daily'] ?? 1))
             ->setDays((int)($data['days'] ?? 30))
             ->setStart($start)
             ->setSets(is_array($data['sets'] ?? null) ? $data['sets'] : []);

        $this->em->persist($goal);
        $this->em->flush();

        return new JsonResponse($goal->toArray());
    }

    #[Route('/{id}', methods: ['PATCH'])]
    public function update(int $id, Request $request): JsonResponse
    {
        $user = $this->getUser();
        if (!$user instanceof User) {
            return new JsonResponse(['error' => 'Unauthorized'], Response::HTTP_UNAUTHORIZED);
        }

        $goal = $this->goals->findOneBy(['id' => $id, 'userId' => $user->getId()]);
        if (!$goal) {
            return new JsonResponse(['error' => 'Nicht gefunden'], Response::HTTP_NOT_FOUND);
        }

        $data = json_decode($request->getContent(), true) ?? [];
        if (isset($data['name']))  $goal->setName((string)$data['name']);
        if (isset($data['unit']))  $goal->setUnit((string)$data['unit']);
        if (isset($data['daily'])) $goal->setDaily((float)$data['daily']);
        if (isset($data['days']))  $goal->setDays((int)$data['days']);
        if (isset($data['sets']))  $goal->setSets((array)$data['sets']);

        $this->em->flush();
        return new JsonResponse(['ok' => true]);
    }

    #[Route('/{id}', methods: ['DELETE'])]
    public function delete(int $id): JsonResponse
    {
        $user = $this->getUser();
        if (!$user instanceof User) {
            return new JsonResponse(['error' => 'Unauthorized'], Response::HTTP_UNAUTHORIZED);
        }

        $goal = $this->goals->findOneBy(['id' => $id, 'userId' => $user->getId()]);
        if ($goal) {
            $this->em->remove($goal);
            $this->em->flush();
        }
        return new JsonResponse(['ok' => true]);
    }
}