using System;
using System.Collections.Generic;
using System.Reflection;

namespace Neo.Afx.Services
{
    /// <summary>
    /// Provides the base for a worker instance.
    /// </summary>
    public abstract class Worker : IWorker
    {
        protected readonly object PropertyLock = new object();

        #region UserID

        long _userID;

        /// <summary>
        /// Gets or sets the user ID.
        /// </summary>
        public long UserID
        {
            get
            {
                lock(PropertyLock)
                {
                    return _userID;
                }
            }
            set
            {
                lock(PropertyLock)
                {
                    _userID = value;
                }
            }
        }

        #endregion

        #region UserName

        string _userEmail;

        /// <summary>
        /// Gets or sets the user name.
        /// </summary>
        public string UserEmail
        {
            get
            {
                lock(PropertyLock)
                {
                    return _userEmail;
                }
            }
            set
            {
                lock(PropertyLock)
                {
                    _userEmail = value;
                }
            }
        }

        #endregion

        #region Settings

        Dictionary<string, string> _settings;

        /// <summary>
        /// Gets or sets the configuration settings.
        /// </summary>
        public Dictionary<string, string> Settings
        {
            get
            {
                lock(PropertyLock)
                {
                    return _settings;
                }
            }
            set
            {
                lock(PropertyLock)
                {
                    _settings = value;
                }
            }
        }

        #endregion

        #region TraceInfo

        string _traceInfo;

        /// <summary>
        /// Gets or sets the trace information, if any.
        /// </summary>
        public string TraceInfo
        {
            get
            {
                lock(PropertyLock)
                {

                    return _traceInfo;
                }
            }
            set
            {
                lock(PropertyLock)
                {

                    _traceInfo = value;
                }
            }
        }

        #endregion

        #region Create

        /// <summary>
        /// Creates an instance of the given <see cref="IWorker"/> type.
        /// </summary>
        /// <param name="typeName">The assembly-qualified name of the <see cref="IWorker"/> type.</param>
        /// <param name="userID">The ID of the user running the <see cref="IWorker"/>.</param>
        /// <param name="userEmail">The email address of the user running the <see cref="IWorker"/>.</param>
        /// <param name="settings">The key-value pair settings for the <see cref="IWorker"/>.</param>
        /// <returns>
        /// The <see cref="IWorker"/> instance that was created, otherwise <code>null</code>.
        /// </returns>
        public static IWorker Create(string typeName, long userID, string userEmail, Dictionary<string, string> settings)
        {
            var objectType = Type.GetType(typeName);
            var workerObject = Activator.CreateInstance(objectType);
            var worker = (IWorker)workerObject;
            worker.UserID = userID;
            worker.UserEmail = userEmail;
            worker.Settings = settings;
            return worker;
        }

        public static IWorker Create(IWorker worker, long userID, string userEmail, Dictionary<string, string> settings)
        {
            worker.UserID = userID;
            worker.UserEmail = userEmail;
            worker.Settings = settings;
            return worker;
        }

        #endregion
    }
}