<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Http\JsonResponse;

class MerchantController extends Controller
{
    /**
     * GET /api/merchants
     * Get all merchants with optional filters
     */
    public function index(Request $request): JsonResponse
    {
        // Read from merchants.json file (like the original Express.js backend)
        $jsonPath = base_path('merchants.json');

        if (!file_exists($jsonPath)) {
            return response()->json([]);
        }

        $merchants = json_decode(file_get_contents($jsonPath), true);

        // Filter by bbox if provided
        if ($request->has('bbox') && !empty($request->bbox)) {
            $bbox = explode(',', $request->bbox);
            if (count($bbox) === 4) {
                $minLng = (float) $bbox[0];
                $minLat = (float) $bbox[1];
                $maxLng = (float) $bbox[2];
                $maxLat = (float) $bbox[3];

                $merchants = array_filter($merchants, function ($m) use ($minLat, $maxLat, $minLng, $maxLng) {
                    return $m['latitude'] >= $minLat &&
                        $m['latitude'] <= $maxLat &&
                        $m['longitude'] >= $minLng &&
                        $m['longitude'] <= $maxLng;
                });
            }
        }

        // Filter by categories if provided
        if ($request->has('categories') && !empty($request->categories)) {
            $categories = explode(',', $request->categories);
            $merchants = array_filter($merchants, function ($m) use ($categories) {
                return in_array($m['category'], $categories);
            });
        }


        // Return plain values
        return response()->json(array_map(function ($m) {
            $m['latitude'] = (float) $m['latitude'];
            $m['longitude'] = (float) $m['longitude'];
            return $m;
        }, array_values($merchants)));
    }
}