using System.Configuration;
using MongoDB.Driver;

namespace Sony.ChartBot.Repository
{
    public abstract class BaseRepository<T>
    {
        private readonly string _databaseName;
        private readonly string _collectionName;

        private MongoClient _client;
        private IMongoDatabase _database;

        protected BaseRepository(string database, string collectionName)
        {
            _databaseName = database;
            _collectionName = collectionName;
        }

        protected virtual MongoClient Client
        {
            get
            {
                return _client ?? (_client = 
                    new MongoClient(GetConnectionString("mongodb")));
            }
        }

        protected virtual IMongoDatabase Database
        {
            get
            {
                return _database ?? (_database = 
                    Client.GetDatabase(_databaseName));
            }
        }

        protected virtual IMongoCollection<T> Collection
        {
            get
            {
                return Database.GetCollection<T>(_collectionName);
            }
        }

        private string GetConnectionString(string connectionStringName)
        {
            return ConfigurationManager
                .ConnectionStrings[connectionStringName]
                .ConnectionString;
        }
    }
}