<?php

namespace App\Http\Controllers\Api;

use App\Services\Posts\NotificationDigestService;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use App\Http\Controllers\Controller;

/**
 * GET  /api/notifications           — digestd notification list
 * POST /api/notifications/read-all  — mark all unread as read
 * POST /api/notifications/{id}/read — mark single as read
 */
class NotificationController extends Controller
{
    public function __construct(private NotificationDigestService $digest) {}

    public function index(Request $request): JsonResponse
    {
        $user = $request->user();
        $page = max(1, (int) $request->query('page', 1));

        $notifications = $user->notifications()
            ->latest()
            ->limit(200) // aggregate from last 200 raw notifs
            ->get();

        $digested = $this->digest->aggregate($notifications);

        // Simple manual pagination on the digested array
        $perPage  = 20;
        $total    = count($digested);
        $sliced   = array_slice($digested, ($page - 1) * $perPage, $perPage);
        $unread   = $user->unreadNotifications()->count();

        return response()->json([
            'data'         => array_values($sliced),
            'unread_count' => $unread,
            'meta'         => [
                'total'        => $total,
                'current_page' => $page,
                'last_page'    => (int) ceil($total / $perPage) ?: 1,
                'per_page'     => $perPage,
            ],
        ]);
    }

    public function readAll(Request $request): JsonResponse
    {
        $request->user()->unreadNotifications->markAsRead();
        return response()->json(['message' => 'All notifications marked as read.']);
    }

    public function markRead(Request $request, string $id): JsonResponse
    {
        $notif = $request->user()->notifications()->findOrFail($id);
        $notif->markAsRead();
        return response()->json(['message' => 'Notification marked as read.']);
    }
}