using System;
using System.Collections.Generic;

namespace Neo.Afx.Services
{
    public class ServiceTask
    {
        private readonly object _theLock = new object();
        private readonly IExecutable _executable;

        #region Initialization

        public ServiceTask(ServiceSchedule serviceSchedule, int serviceID, string serviceName, IExecutable executable)
        {
            Schedule = serviceSchedule;
            ServiceID = serviceID;
            ServiceName = serviceName;
            _executable = executable;
        }

        #endregion

        #region ServiceID

        public int ServiceID
        {
            get;
            private set;
        }

        #endregion

        #region ServiceName

        public string ServiceName
        {
            get;
            private set;
        }

        #endregion

        #region Schedule

        public ServiceSchedule Schedule
        {
            get;
            private set;
        }

        #endregion

        #region TraceInfo

        public string TraceInfo
        {
            get;
            private set;
        }

        #endregion

        #region Exceptions

        public IEnumerable<Exception> Exceptions
        {
            get;
            internal set;
        }

        #endregion

        #region IsBusy

        public bool IsBusy
        {
            get;
            private set;
        }

        #endregion

        #region Run

        public void Run()
        {
            TraceInfo = null;
            Exceptions = null;
            lock(_theLock)
            {
                try
                {
                    IsBusy = true;
                    _executable.Run();
                    TraceInfo = _executable.TraceInfo;
                }
                finally
                {
                    IsBusy = false;
                }
            }
        }

        #endregion

        #region ToString

        public override string ToString()
        {
            return string.Format("{0}    LRT={1:G}", ServiceName, Schedule.LastRunTime);
        }

        public string ToString(string messageType, string message)
        {
            return string.Format("ST-{0}-{1} {2} - {3}", ServiceID, messageType, Schedule.PollFrequency, message);
        }

        #endregion
    }
}