<?php

namespace App\Http\Controllers\API;

use App\Http\Controllers\Controller;
use App\Http\Resources\CityResource;
use App\Models\City;
use Illuminate\Http\Request;

class FavoriteController extends Controller
{
    /**
     * Get user's favorite cities
     */
    public function index(Request $request)
    {
        $favorites = $request->user()
            ->favoriteCities()
            ->withCount('attractions')
            ->get();

        return CityResource::collection($favorites);
    }

    /**
     * Add city to favorites
     */
    public function store(Request $request, City $city)
    {
        $user = $request->user();

        // Check if already favorited
        if ($user->favoriteCities()->where('city_id', $city->id)->exists()) {
            return response()->json([
                'message' => 'City already in favorites',
            ], 409);
        }

        $user->favoriteCities()->attach($city->id);

        return response()->json([
            'message' => 'City added to favorites',
            'city' => new CityResource($city),
        ], 201);
    }

    /**
     * Remove city from favorites
     */
    public function destroy(Request $request, City $city)
    {
        $user = $request->user();
        $user->favoriteCities()->detach($city->id);

        return response()->json([
            'message' => 'City removed from favorites',
        ]);
    }
}