<?php

namespace App\Services;

use Illuminate\Http\Client\ConnectionException;
use Illuminate\Http\Client\PendingRequest;
use Illuminate\Http\Client\RequestException;
use Illuminate\Support\Facades\Http;
use Illuminate\Support\Facades\Log;

class GeocodingService
{
    /**
     * @return array<int, array<string, mixed>>
     */
    public function search(string $query): array
    {
        $query = trim($query);

        if (strlen($query) < 3) {
            return [];
        }

        try {
            $response = $this->client()->get(config('services.nominatim.url').'/search', [
                'q' => $query,
                'format' => 'json',
                'addressdetails' => 1,
                'limit' => 5,
                'countrycodes' => 'fr',
            ]);
        } catch (ConnectionException|RequestException $exception) {
            Log::warning('Geocoding search failed.', [
                'query' => $query,
                'message' => $exception->getMessage(),
            ]);

            return [];
        }

        if (! $response->successful()) {
            return [];
        }

        return collect($response->json())
            ->map(fn (array $item) => $this->formatResult($item))
            ->filter(fn (array $item) => $item['address'] !== '')
            ->values()
            ->all();
    }

    /**
     * @return array{latitude: float, longitude: float}|null
     */
    public function geocode(string $address, ?string $city = null, ?string $zipCode = null): ?array
    {
        $query = collect([$address, $zipCode, $city, 'France'])
            ->filter(fn (?string $part) => $part !== null && trim($part) !== '')
            ->implode(', ');

        $results = $this->search($query);

        if ($results === [] || $results[0]['latitude'] === null || $results[0]['longitude'] === null) {
            return null;
        }

        return [
            'latitude' => $results[0]['latitude'],
            'longitude' => $results[0]['longitude'],
        ];
    }

    private function client(): PendingRequest
    {
        return Http::withHeaders([
            'User-Agent' => config('services.nominatim.user_agent'),
            'Accept-Language' => 'fr',
        ])
            ->withOptions([
                'verify' => (bool) config('services.nominatim.verify_ssl', true),
            ])
            ->timeout(8)
            ->connectTimeout(4);
    }

    /**
     * @param  array<string, mixed>  $item
     * @return array<string, mixed>
     */
    private function formatResult(array $item): array
    {
        $addressParts = $item['address'] ?? [];
        $street = trim(($addressParts['house_number'] ?? '').' '.($addressParts['road'] ?? ''));

        if ($street === '') {
            $street = trim((string) ($item['name'] ?? ''));
        }

        return [
            'label' => (string) ($item['display_name'] ?? $street),
            'address' => $street,
            'city' => $addressParts['city']
                ?? $addressParts['town']
                ?? $addressParts['village']
                ?? $addressParts['municipality']
                ?? '',
            'zip_code' => (string) ($addressParts['postcode'] ?? ''),
            'latitude' => isset($item['lat']) ? (float) $item['lat'] : null,
            'longitude' => isset($item['lon']) ? (float) $item['lon'] : null,
        ];
    }
}