<?php

namespace App\Http\Controllers\Api\V1\Geo;

use App\Http\Controllers\Api\V1\ApiController;
use App\Models\Tenant;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Facades\Http;
use Illuminate\Support\Facades\Log;

class FetchBoundaryController extends ApiController
{
    public function __invoke(Request $request): JsonResponse
    {
        $request->validate([
            'q' => ['required', 'string', 'max:100'],
        ]);

        $searchQuery = $request->string('q');
        $user = $request->user();
        $lguSuffix = '';

        if ($user && $user->tenant_id) {
            $tenant = $user->tenant ?: Tenant::find($user->tenant_id);
            if ($tenant && $tenant->cityMunicipality) {
                $lguSuffix = ', ' . $tenant->cityMunicipality->name;
            }
        }

        $fullQuery = $searchQuery . $lguSuffix . ', Philippines';

        // Cache lookup results to protect Nominatim API rate limits
        $cacheKey = 'geo_boundary_' . md5(strtolower($fullQuery));

        $results = Cache::remember($cacheKey, now()->addDays(7), function () use ($fullQuery) {
            try {
                $response = Http::withHeaders([
                    'User-Agent' => 'Verde Waste Management App (admin@verde.local)',
                ])->get('https://nominatim.openstreetmap.org/search', [
                    'q' => $fullQuery,
                    'format' => 'json',
                    'polygon_geojson' => 1,
                    'limit' => 5,
                ]);

                if ($response->successful()) {
                    $data = $response->json() ?? [];
                    return collect($data)
                        ->filter(fn ($item) => isset($item['geojson']))
                        ->map(fn ($item) => [
                            'display_name' => $item['display_name'] ?? 'Unknown Location',
                            'geojson' => $item['geojson'],
                        ])
                        ->values()
                        ->all();
                }
            } catch (\Exception $e) {
                Log::error('Nominatim boundary fetch failed: ' . $e->getMessage());
            }

            return [];
        });

        return $this->ok($results);
    }
}