using System;

namespace Butterfly.Storage
{
    /// <summary>
    /// Represents a database server and holds information about the database host, port and access credentials.
    /// </summary>
    internal class DatabaseServer
    {
        #region Fields
        private readonly string mHost;
        private readonly uint mPort;

        private readonly string mUser;
        private readonly string mPassword;
        #endregion

        #region Properties
        /// <summary>
        /// The network host of the database server, eg 'localhost' or '127.0.0.1'.
        /// </summary>
        internal string Host
        {
            get { return mHost; }
        }
        /// <summary>
        /// The network port of the database server as an unsigned 32 bit integer.
        /// </summary>
        internal uint Port
        {
            get { return mPort; }
        }
        /// <summary>
        /// The username to use when connecting to the database.
        /// </summary>
        internal string User
        {
            get { return mUser; }
        }
        /// <summary>
        /// The password to use in combination with the username when connecting to the database.
        /// </summary>
        internal string Password
        {
            get { return mPassword; }
        }
        #endregion

        #region Constructor
        /// <summary>
        /// Constructs a DatabaseServer object with given details.
        /// </summary>
        /// <param name="sHost">The network host of the database server, eg 'localhost' or '127.0.0.1'.</param>
        /// <param name="Port">The network port of the database server as an unsigned 32 bit integer.</param>
        /// <param name="sUser">The username to use when connecting to the database.</param>
        /// <param name="sPassword">The password to use in combination with the username when connecting to the database.</param>
        internal DatabaseServer(string sHost, uint Port, string sUser, string sPassword)
        {
            if (sHost == null || sHost.Length == 0)
                throw new ArgumentException("sHost is null or empty");
            if (sUser == null || sUser.Length == 0)
                throw new ArgumentException("sUser is null or empty");

            mHost = sHost;
            mPort = Port;

            mUser = sUser;
            mPassword = (sPassword != null) ? sPassword : "";
        }
        #endregion

        #region Methods
        public override string ToString()
        {
            return mUser + "@" + mHost;
        }
        #endregion
    }
}