//This product contains GeoLite2 data created by MaxMind, from http://www.maxmind.com
using Grand.Business.Core.Interfaces.Catalog.Directory;
using Grand.SharedKernel.Extensions;
using MaxMind.GeoIP2;
using MaxMind.GeoIP2.Exceptions;
using MaxMind.GeoIP2.Responses;
using Microsoft.Extensions.Logging;

namespace Grand.Business.Catalog.Services.Directory
{
    /// <summary>
    /// GEO lookup service
    /// </summary>
    public class GeoLookupService : IGeoLookupService
    {
        #region Fields

        private readonly ILogger<GeoLookupService> _logger;

        #endregion

        #region Ctor

        public GeoLookupService(ILogger<GeoLookupService> logger)
        {
            _logger = logger;
        }

        #endregion

        #region Utilities

        protected virtual CountryResponse GetInformation(string ipAddress)
        {
            if (string.IsNullOrEmpty(ipAddress))
                return null;

            try
            {
                //This product includes GeoLite2 data created by MaxMind, available from http://www.maxmind.com
                var databasePath = CommonPath.MapPath("App_Data/GeoLite2-Country.mmdb");
                var reader = new DatabaseReader(databasePath);
                var response = reader.Country(ipAddress);
                return response;
                //more info: http://maxmind.github.io/GeoIP2-dotnet/
                //more info: https://github.com/maxmind/GeoIP2-dotnet
            }
            catch (GeoIP2Exception)
            {
                return null;
            }
            catch (Exception exc)
            {
                _logger.LogError(exc, "Cannot load MaxMind record");
                return null;
            }
        }

        #endregion

        #region Methods
        /// <summary>
        /// Get country name
        /// </summary>
        /// <param name="ipAddress">IP address</param>
        /// <returns>Country name</returns>
        public virtual string CountryIsoCode(string ipAddress)
        {
            var response = GetInformation(ipAddress);
            return response is { } ? response.Country.IsoCode : "";
        }

        /// <summary>
        /// Get country name
        /// </summary>
        /// <param name="ipAddress">IP address</param>
        /// <returns>Country name</returns>
        public virtual string CountryName(string ipAddress)
        {
            var response = GetInformation(ipAddress);
            return response is { } ? response.Country.Name : "";
        }

        #endregion
    }
}