<?php

declare(strict_types=1);

namespace App\Http\Controllers;

use App\Models\Tracker;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;

class TrackerController extends Controller
{
    public function show(): JsonResponse
    {
        $tracker = Tracker::current();

        if (! $tracker) {
            return response()->json(['exists' => false]);
        }

        return response()->json(['exists' => true, 'tracker' => $tracker]);
    }

    public function store(Request $request): JsonResponse
    {
        $validated = $request->validate([
            'label' => 'sometimes|string|max:255',
            'unit' => 'sometimes|string|max:50',
        ]);

        if (Tracker::current()) {
            return response()->json(['error' => 'Tracker already exists.'], 409);
        }

        $tracker = Tracker::create([
            'label' => $validated['label'] ?? 'Counter',
            'unit' => $validated['unit'] ?? 'units',
        ]);

        return response()->json($tracker, 201);
    }

    public function update(Request $request): JsonResponse
    {
        $validated = $request->validate([
            'label' => 'sometimes|string|max:255',
            'unit' => 'sometimes|string|max:50',
        ]);

        $tracker = Tracker::current();

        if (! $tracker) {
            return response()->json(['error' => 'No counter found.'], 404);
        }

        $tracker->update($validated);

        return response()->json($tracker);
    }
}