<?php
namespace ABeCe\Booking\Service;

use ABeCe\Booking\Domain\CatalogException;
use ABeCe\Booking\Plugin;

/** Explicit admin searches only; never autocomplete or background geocoding. */
final class LocationGeocodingService {
 public function search(array $input):array {
  BookingValidator::fields($input,['address']);
  $address=$input['address']??null;
  if(!is_string($address)||mb_strlen(trim($address))<3||mb_strlen($address)>255)CatalogValidator::invalid('address',__('Enter the venue street, town and country.','abece-booking'));
  $address=trim(sanitize_text_field($address));if(mb_strlen($address)<3)CatalogValidator::invalid('address',__('Enter the venue street, town and country.','abece-booking'));
  $endpoint=apply_filters('abece_booking_geocoding_endpoint',defined('ASB_GEOCODING_URL')?ASB_GEOCODING_URL:'https://nominatim.openstreetmap.org/search');
  if(!is_string($endpoint)||!wp_http_validate_url($endpoint)||wp_parse_url($endpoint,PHP_URL_SCHEME)!=='https')throw new CatalogException('abece_booking_geocoding_unavailable',__('Address search is unavailable. You can enter coordinates manually.','abece-booking'),503);
  $locale=str_replace('_','-',determine_locale());$key='abece_booking_geo_'.hash('sha256',$endpoint.'|'.$locale.'|'.$address);$cached=get_transient($key);if(is_array($cached))return ['results'=>$cached];
  global $wpdb;$lock=\ABeCe\Booking\Infrastructure\Database\Tables::lock($wpdb,'geocoding');
  if((string)$wpdb->get_var($wpdb->prepare('SELECT GET_LOCK(%s,0)',$lock))!=='1')$this->busy();
  try{
   $cached=get_transient($key);if(is_array($cached))return ['results'=>$cached];
   if(microtime(true)-(float)get_transient('abece_booking_geocoding_last_request')<1.0)$this->busy();
   if(!set_transient('abece_booking_geocoding_last_request',microtime(true),60))throw new CatalogException('abece_booking_geocoding_unavailable',__('Address search is unavailable. You can enter coordinates manually.','abece-booking'),503);
   $response=wp_safe_remote_get(add_query_arg(['q'=>$address,'format'=>'jsonv2','limit'=>5],$endpoint),['timeout'=>8,'redirection'=>0,'limit_response_size'=>65536,'user-agent'=>'ABeCe Booking/'.Plugin::VERSION.' (+'.home_url('/').')','headers'=>['Accept'=>'application/json','Accept-Language'=>$locale]]);
   if(is_wp_error($response)||wp_remote_retrieve_response_code($response)!==200)throw new CatalogException('abece_booking_geocoding_unavailable',__('Address search is unavailable. You can enter coordinates manually.','abece-booking'),503);
   $data=json_decode(wp_remote_retrieve_body($response),true);
   if(!is_array($data)||!array_is_list($data))throw new CatalogException('abece_booking_geocoding_unavailable',__('Address search is unavailable. You can enter coordinates manually.','abece-booking'),503);
   $results=[];foreach(array_slice($data,0,5)as $row){
    if(!is_array($row)||!isset($row['lat'],$row['lon'],$row['display_name'])||!is_numeric($row['lat'])||!is_numeric($row['lon'])||!is_string($row['display_name']))continue;
    $lat=(float)$row['lat'];$lon=(float)$row['lon'];if(!is_finite($lat)||!is_finite($lon)||abs($lat)>90||abs($lon)>180)continue;
    $label=sanitize_text_field($row['display_name']);if($label==='')continue;
    $results[]=['latitude'=>$lat,'longitude'=>$lon,'label'=>$label];
   }
   set_transient($key,$results,DAY_IN_SECONDS);return ['results'=>$results];
  }finally{$wpdb->get_var($wpdb->prepare('SELECT RELEASE_LOCK(%s)',$lock));}
 }
 private function busy():never{throw new CatalogException('abece_booking_geocoding_busy',__('Please wait a moment before searching again.','abece-booking'),429);}
}