<?php

declare(strict_types=1);

namespace GeoIp2\WebService;

use GeoIp2\Exception\AddressNotFoundException;
use GeoIp2\Exception\AuthenticationException;
use GeoIp2\Exception\GeoIp2Exception;
use GeoIp2\Exception\HttpException;
use GeoIp2\Exception\InvalidRequestException;
use GeoIp2\Exception\OutOfQueriesException;
use GeoIp2\Model\City;
use GeoIp2\Model\Country;
use GeoIp2\Model\Insights;
use GeoIp2\ProviderInterface;
use MaxMind\Exception\InsufficientFundsException;
use MaxMind\Exception\IpAddressNotFoundException;
use MaxMind\Exception\WebServiceException;
use MaxMind\WebService\Client as WsClient;

/**
 * This class provides a client API for all the GeoIP web services.
 * The services are Country, City Plus, and Insights. Each service returns
 * a different set of data about an IP address, with Country returning the
 * least data and Insights the most.
 *
 * Each web service is represented by a different model class, and these model
 * classes in turn contain multiple record classes. The record classes have
 * attributes which contain data about the IP address.
 *
 * If the web service does not return a particular piece of data for an IP
 * address, the associated attribute is not populated.
 *
 * The web service may not return any information for an entire record, in
 * which case all of the attributes for that record class will be empty.
 *
 * ## Usage ##
 *
 * The basic API for this class is the same for all of the web service end
 * points. First you create a web service object with your MaxMind `$accountId`
 * and `$licenseKey`, then you call the method corresponding to a specific end
 * point, passing it the IP address you want to look up.
 *
 * If the request succeeds, the method call will return a model class for
 * the service you called. This model in turn contains multiple record
 * classes, each of which represents part of the data returned by the web
 * service.
 *
 * If the request fails, the client class throws an exception.
 */
class Client implements ProviderInterface
{
    private readonly WsClient $client;
    private static string $basePath = '/geoip/v2.1';

    public const VERSION = 'v3.4.0';

    /**
     * Constructor.
     *
     * @param int                  $accountId  your MaxMind account ID
     * @param string               $licenseKey your MaxMind license key
     * @param list<string>         $locales    list of locale codes to use in name property
     *                                         from most preferred to least preferred
     * @param array<string, mixed> $options    array of options. Valid options include:
     *                                         * `host` - The host to use when querying the web
     *                                         service. To query the GeoLite web service
     *                                         instead of the GeoIP web service, set the
     *                                         host to `geolite.info`. To query the Sandbox
     *                                         GeoIP web service instead of the production
     *                                         GeoIP web service, set the host to
     *                                         `sandbox.maxmind.com`. The sandbox allows you to
     *                                         experiment with the API without affecting your
     *                                         production data.
     *                                         * `timeout` - Timeout in seconds.
     *                                         * `connectTimeout` - Initial connection timeout in seconds.
     *                                         * `proxy` - The HTTP proxy to use. May include a schema, port,
     *                                         username, and password, e.g.,
     *                                         `http://username:password@127.0.0.1:10`.
     */
    public function __construct(
        int $accountId,
        string $licenseKey,
        /** @var list<string> */
        public readonly array $locales = ['en'], // Promoted and readonly
        array $options = []
    ) {
        // This is for backwards compatibility. Do not remove except for a
        // major version bump.
        // @phpstan-ignore-next-line
        if (\is_string($options)) {
            $options = ['host' => $options];
        }

        $options['host'] ??= 'geoip.maxmind.com';

        $options['userAgent'] = $this->userAgent();

        $this->client = new WsClient($accountId, $licenseKey, $options);
    }

    private function userAgent(): string
    {
        return 'GeoIP2-API/' . self::VERSION;
    }

    /**
     * This method calls the City Plus service.
     *
     * @param string $ipAddress IPv4 or IPv6 address as a string. If no
     *                          address is provided, the address that the web service is called
     *                          from will be used.
     *
     * @throws AddressNotFoundException  if the address you provided is not in our database (e.g.,
     *                                   a private address).
     * @throws AuthenticationException   if there is a problem with the account ID or license key
     *                                   that you provided
     * @throws OutOfQueriesException     if your account is out of queries
     * @throws InvalidRequestException   if your request was received by the web service but is
     *                                   invalid for some other reason.  This may indicate an issue
     *                                   with this API. Please report the error to MaxMind.
     * @throws HttpException             if an unexpected HTTP error code or message was returned.
     *                                   This could indicate a problem with the connection between
     *                                   your server and the web service or that the web service
     *                                   returned an invalid document or 500 error code
     * @throws GeoIp2Exception           This serves as the parent
     *                                   class to the above exceptions. It will be thrown directly
     *                                   if a 200 status code is returned but the body is invalid.
     * @throws \InvalidArgumentException if something other than a single IP address or "me" is
     *                                   passed to the method
     */
    public function city(string $ipAddress = 'me'): City
    {
        return $this->responseFor('city', City::class, $ipAddress);
    }

    /**
     * This method calls the Country service.
     *
     * @param string $ipAddress IPv4 or IPv6 address as a string. If no
     *                          address is provided, the address that the web service is called
     *                          from will be used.
     *
     * @throws AddressNotFoundException  if the address you provided is not in our database (e.g.,
     *                                   a private address).
     * @throws AuthenticationException   if there is a problem with the account ID or license key that you provided
     * @throws OutOfQueriesException     if your account is out of queries
     * @throws InvalidRequestException   if your request was received by the web service but is
     *                                   invalid for some other reason.  This may indicate an
     *                                   issue with this API. Please report the error to MaxMind.
     * @throws HttpException             if an unexpected HTTP error
     *                                   code or message was returned. This could indicate a problem
     *                                   with the connection between your server and the web service
     *                                   or that the web service returned an invalid document or 500
     *                                   error code.
     * @throws GeoIp2Exception           This serves as the parent class to the above exceptions. It
     *                                   will be thrown directly if a 200 status code is returned but
     *                                   the body is invalid.
     * @throws \InvalidArgumentException if something other than a single IP address or "me" is
     *                                   passed to the method
     */
    public function country(string $ipAddress = 'me'): Country
    {
        return $this->responseFor('country', Country::class, $ipAddress);
    }

    /**
     * This method calls the Insights service. Insights is only supported by
     * the GeoIP web service. The GeoLite web service does not support it.
     *
     * @param string $ipAddress IPv4 or IPv6 address as a string. If no
     *                          address is provided, the address that the web service is called
     *                          from will be used.
     *
     * @throws AddressNotFoundException  if the address you provided is not in our database (e.g.,
     *                                   a private address).
     * @throws AuthenticationException   if there is a problem with the account ID or license key
     *                                   that you provided
     * @throws OutOfQueriesException     if your account is out of queries
     * @throws InvalidRequestException   if your request was received by the web service but is
     *                                   invalid for some other reason.  This may indicate an
     *                                   issue with this API. Please report the error to MaxMind.
     * @throws HttpException             if an unexpected HTTP error code or message was returned.
     *                                   This could indicate a problem with the connection between
     *                                   your server and the web service or that the web service
     *                                   returned an invalid document or 500 error code
     * @throws GeoIp2Exception           This serves as the parent
     *                                   class to the above exceptions. It will be thrown directly
     *                                   if a 200 status code is returned but the body is invalid.
     * @throws \InvalidArgumentException if something other than a single IP address or "me" is
     *                                   passed to the method
     */
    public function insights(string $ipAddress = 'me'): Insights
    {
        return $this->responseFor('insights', Insights::class, $ipAddress);
    }

    /**
     * Generic helper method to call an endpoint and return the corresponding model.
     *
     * @template TModel of City|Country|Insights
     *
     * @param 'city'|'country'|'insights' $endpoint  the endpoint name
     * @param class-string<TModel>        $class     The specific model class string (e.g., City::class)
     * @param string                      $ipAddress the IP address or 'me'
     *
     * @throws AddressNotFoundException
     * @throws AuthenticationException
     * @throws OutOfQueriesException
     * @throws InvalidRequestException
     * @throws HttpException
     * @throws GeoIp2Exception
     * @throws \InvalidArgumentException
     *
     * @return TModel the corresponding model object, matching the passed class string
     */
    private function responseFor(string $endpoint, string $class, string $ipAddress): City|Country|Insights
    {
        if ($ipAddress !== 'me' && !filter_var($ipAddress, \FILTER_VALIDATE_IP)) {
            throw new \InvalidArgumentException(
                "The value \"$ipAddress\" is not a valid IP address."
            );
        }
        $path = implode('/', [self::$basePath, $endpoint, $ipAddress]);

        try {
            $service = (new \ReflectionClass($class))->getShortName();
            $body = $this->client->get('GeoIP ' . $service, $path);
        } catch (IpAddressNotFoundException $ex) {
            throw new AddressNotFoundException(
                $ex->getMessage(),
                $ex->getStatusCode(),
                $ex
            );
        } catch (\MaxMind\Exception\AuthenticationException $ex) {
            throw new AuthenticationException(
                $ex->getMessage(),
                $ex->getStatusCode(),
                $ex
            );
        } catch (InsufficientFundsException $ex) {
            throw new OutOfQueriesException(
                $ex->getMessage(),
                $ex->getStatusCode(),
                $ex
            );
        } catch (\MaxMind\Exception\InvalidRequestException $ex) {
            throw new InvalidRequestException(
                $ex->getMessage(),
                $ex->getErrorCode(),
                $ex->getStatusCode(),
                $ex->getUri(),
                $ex
            );
        } catch (\MaxMind\Exception\HttpException $ex) {
            throw new HttpException(
                $ex->getMessage(),
                $ex->getStatusCode(),
                $ex->getUri(),
                $ex
            );
        } catch (WebServiceException $ex) {
            throw new GeoIp2Exception(
                $ex->getMessage(),
                $ex->getCode(),
                $ex
            );
        }

        return new $class($body, $this->locales);
    }
}
