using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data.SqlClient;
using System.Configuration;

namespace bnhtrade.Core.Data.Database
{
    public class Connection
    {
        //protected readonly string SqlConnectionString;
        private Model.Credentials.bnhtradeDB dbCredentials;

        protected string SqlConnectionString 
        { 
            get { return dbCredentials.ConnectionString; }
        }

        public Connection()
        {
            var config = new Config().GetConfiguration();

            // attempt to retrive credentials from app.local.config
            try
            {
                string dataSource = config.AppSettings.Settings["DbDataSource"].Value;
                string userId = config.AppSettings.Settings["DbUserId"].Value;
                string pass = config.AppSettings.Settings["DbUserPassword"].Value;

                // check
                if (string.IsNullOrEmpty(dataSource))
                {
                    throw new ArgumentException("Could not retrive 'DbDataSource' from config file");
                }
                else if (string.IsNullOrEmpty(userId))
                {
                    throw new ArgumentException("Could not retrive 'DbUserId' from config file");
                }
                else if (string.IsNullOrEmpty(pass))
                {
                    throw new ArgumentException("Could not retrive 'DbUserPassword' from config file");
                }

                var dbCredentials = new bnhtrade.Core.Model.Credentials.bnhtradeDB(dataSource, userId, pass);
                this.dbCredentials = dbCredentials;
            }
            catch (Exception ex)
            {
                throw new Exception("Unable to retirve DB credentials: " + ex.Message);
            }
        }

        private void ConnectionOld()
        {
            // attempt to retrive credentials from app.local.config
            try
            {
                string dataSource = ConfigurationManager.AppSettings["DbDataSource"];
                string userId = ConfigurationManager.AppSettings["DbUserId"];
                string pass = ConfigurationManager.AppSettings["DbUserPassword"];

                // check
                if (string.IsNullOrEmpty(dataSource))
                {
                    throw new ArgumentException("Could not retrive 'DbDataSource' from config file");
                }
                else if (string.IsNullOrEmpty(userId))
                {
                    throw new ArgumentException("Could not retrive 'DbUserId' from config file");
                }
                else if (string.IsNullOrEmpty(pass))
                {
                    throw new ArgumentException("Could not retrive 'DbUserPassword' from config file");
                }

                var dbCredentials = new bnhtrade.Core.Model.Credentials.bnhtradeDB(dataSource, userId, pass);
                this.dbCredentials = dbCredentials;
            }
            catch(Exception ex)
            {
                throw new Exception("Unable to retirve DB credentials: " + ex.Message);
            }
        }

        public Connection(Model.Credentials.bnhtradeDB dbCredentials)
        {
            // setup sql parameters
            if (dbCredentials == null)
            {
                throw new Exception("DB credentials object is null");
            }
            this.dbCredentials = dbCredentials;
        }
    }
}