<?php

namespace App\Http\Controllers;

use App\Http\Controllers\Concerns\ResolvesActiveUnit;
use App\Services\ClassService;
use App\Http\Requests\ClassRequest;
use App\Http\Resources\ClassResource;
use Illuminate\Http\Request;
use Illuminate\Http\JsonResponse;

class ClassController extends Controller
{
    use ResolvesActiveUnit;

    public function __construct(
        protected ClassService $service,
    ) {}

    public function index(): JsonResponse
    {
        $unitId = $this->activeUnitId();
        if (!$unitId) {
            return $this->successResponse(payload: []);
        }

        $items = $this->service->getAllByUnit($unitId);
        return $this->successResponse(payload: ClassResource::collection($items));
    }

    public function store(ClassRequest $request): JsonResponse
    {
        $data = array_merge($request->validated(), ['unit_id' => $this->activeUnitId()]);
        $item = $this->service->create($data);
        return $this->successResponse(payload: new ClassResource($item), message: __('messages.created'), code: 201);
    }

    public function show(int $id): JsonResponse
    {
        $item = $this->service->findById($id);
        return $this->successResponse(payload: new ClassResource($item));
    }

    public function update(ClassRequest $request, int $id): JsonResponse
    {
        $item = $this->service->update($id, $request->validated());
        return $this->successResponse(payload: new ClassResource($item), message: __('messages.updated'));
    }

    public function destroy(int $id): JsonResponse
    {
        $this->service->delete($id);
        return $this->successResponse(message: __('messages.deleted'), code: 204);
    }

    /**
     * Alunos com contrato ativo no pacote da aula + presença registrada.
     */
    public function students(int $id): JsonResponse
    {
        $students = $this->service->getStudentsForClass($id);
        return $this->successResponse(payload: $students);
    }

    /**
     * Salva a lista de presença da aula (upsert em lote).
     */
    public function saveAttendance(Request $request, int $id): JsonResponse
    {
        $validated = $request->validate([
            'attendances'              => 'required|array',
            'attendances.*.student_id' => 'required|integer|exists:students,id',
            'attendances.*.in_class'   => 'required|boolean',
            'attendances.*.justified'  => 'sometimes|boolean',
            'attendances.*.notes'      => 'nullable|string',
        ]);

        $this->service->saveAttendance($id, $validated['attendances']);
        return $this->successResponse(message: __('messages.updated'));
    }
}