using System.Security.Authentication;
using Microsoft.Extensions.Options;
using MongoDB.Driver;

namespace Landmark.OLA.Application.DataAccess
{
    // Reference: http://mongodb.github.io/mongo-csharp-driver/2.5
    public class DataClient : IDataClient
    {
        private readonly MongoClientSettings _mongoSettings;
        private readonly DataAccessConnection _configuration;
        private readonly MongoClient _client;
        private readonly IMongoDatabase _database;

        public DataClient(IOptions<DataAccessConnection> settings) {
            _configuration = settings.Value;
            _mongoSettings = GetMongoSettings();
            _client = new MongoClient(_mongoSettings);
            _database = _client.GetDatabase(_configuration.DatabaseName);
        }

        public IMongoDatabase GetDatabase()
        {
            return _database;
        }

        private MongoClientSettings GetMongoSettings()
        {
            MongoClientSettings settings = new()
            {
                Server = new MongoServerAddress(_configuration.Host, _configuration.Port),
                UseTls = true,
                SslSettings = new SslSettings()
            };
            settings.SslSettings.EnabledSslProtocols = SslProtocols.Tls12;

            MongoIdentity identity = new MongoInternalIdentity(_configuration.DatabaseName, _configuration.UserName);
            MongoIdentityEvidence evidence = new PasswordEvidence(_configuration.Password);

            settings.Credential = new MongoCredential("SCRAM-SHA-1", identity, evidence);
            return settings;
        }
    }

}