using FikaAmazonAPI.AmazonSpApiSDK.Models.Services;
using System;
using System.Configuration;

namespace bnhtrade.Core.Data.Database
{
    /// this class needs a sort out. Ideally it shoud be called what it is, a connection string builder, and
    /// it should expose a method to serve the connection string--rather than class inheritance and using a property setter
    /// something to do once there aren't so many open git branches
    /// 
    public class Connection
    {
        private string _server;
        private string _user;
        private string _userPassword;
        private string _database = "e2A";
        private bool _persistSecurityInfo = true;
        private bool _multipleActiveResultSets = true;
        private bool _encrypt = true;
        private uint _connectRetryInterval;
        private uint _connectRetryCount;
        private uint _connectTimeout;

        internal string SqlConnectionString { get; private set; }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="connectRetryInterval">Retry interval in seconds, must be 5-60</param>
        /// <param name="connectTimeout">Timeout length in seconds (0 is indefinitely)</param>
        /// <exception cref="ArgumentOutOfRangeException"></exception>
        /// <exception cref="Exception"></exception>
        public Connection(uint connectRetryInterval = 10, uint connectRetryCount = 6, uint connectionTimeout = 60)
        {
            if (connectRetryInterval < 5 || connectRetryInterval > 60)
            {
                // these are limits set by the sql server
                throw new ArgumentOutOfRangeException("ConnectRetryInterval must be from 5 to 60 seconds");
            }
            _connectRetryInterval = connectRetryInterval;
            _connectRetryCount = connectRetryCount;
            _connectTimeout = connectionTimeout;

            // retrive credentials from app.local.config
            var config = new Config().GetConfiguration();
            try
            {
                _server = config.AppSettings.Settings["DbDataSource"].Value;
                _user = config.AppSettings.Settings["DbUserId"].Value;
                _userPassword = config.AppSettings.Settings["DbUserPassword"].Value;

                // check
                if (string.IsNullOrEmpty(_server))
                {
                    throw new ArgumentException("Could not retrive 'DbDataSource' from config file");
                }
                else if (string.IsNullOrEmpty(_user))
                {
                    throw new ArgumentException("Could not retrive 'DbUserId' from config file");
                }
                else if (string.IsNullOrEmpty(_userPassword))
                {
                    throw new ArgumentException("Could not retrive 'DbUserPassword' from config file");
                }
            }
            catch (Exception ex)
            {
                throw new Exception("Unable to retirve DB credentials: " + ex.Message);
            }

            // build connection string
            SqlConnectionString = "Server=" + _server + ";Database=" + _database + ";PersistSecurityInfo=" + _persistSecurityInfo.ToString()
                + ";User=" + _user + ";Password=" + _userPassword + ";MultipleActiveResultSets=" + _multipleActiveResultSets.ToString()
                + ";ConnectRetryInterval=" + _connectRetryInterval + ";ConnectRetryCount=" + _connectRetryCount + ";Timeout=" + _connectTimeout
                + ";Encrypt=" + _encrypt.ToString() +";";
        }
    }
}