/*
 *
 * (c) Copyright Ascensio System Limited 2010-2018
 *
 * This program is freeware. You can redistribute it and/or modify it under the terms of the GNU 
 * General Public License (GPL) version 3 as published by the Free Software Foundation (https://www.gnu.org/copyleft/gpl.html). 
 * In accordance with Section 7(a) of the GNU GPL its Section 15 shall be amended to the effect that 
 * Ascensio System SIA expressly excludes the warranty of non-infringement of any third-party rights.
 *
 * THIS PROGRAM IS DISTRIBUTED WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY OR
 * FITNESS FOR A PARTICULAR PURPOSE. For more details, see GNU GPL at https://www.gnu.org/copyleft/gpl.html
 *
 * You can contact Ascensio System SIA by email at sales@onlyoffice.com
 *
 * The interactive user interfaces in modified source and object code versions of ONLYOFFICE must display 
 * Appropriate Legal Notices, as required under Section 5 of the GNU GPL version 3.
 *
 * Pursuant to Section 7 § 3(b) of the GNU GPL you must retain the original ONLYOFFICE logo which contains 
 * relevant author attributions when distributing the software. If the display of the logo in its graphic 
 * form is not reasonably feasible for technical reasons, you must include the words "Powered by ONLYOFFICE" 
 * in every copy of the program you distribute. 
 * Pursuant to Section 7 § 3(e) we decline to grant you any rights under trademark law for use of our trademarks.
 *
*/


using System;
using System.Threading.Tasks;

namespace ASC.Common.Threading.Progress
{
    public abstract class ProgressBase : IProgressItem
    {
        private double _percentage;

        protected int StepCount { get; set; }

        public object Id { get; set; }
        
        public object Status { get; set; }
        
        public object Error { get; set; }

        
        public double Percentage
        {
            get { return Math.Min(100.0, Math.Max(0, _percentage)); }
            set { _percentage = value; }
        }

        public virtual bool IsCompleted { get; set; }


        public void RunJob()
        {
            try
            {
                Percentage = 0;
                DoJob();
            }
            catch (Exception e)
            {
                Error = e;
            }
            finally
            {
                Percentage = 100;
                IsCompleted = true;
            }
        }

        public async Task RunJobAsync()
        {
            try
            {
                Percentage = 0;
                await DoJobAsync();
            }
            catch (Exception e)
            {
                Error = e;
            }
            finally
            {
                Percentage = 100;
                IsCompleted = true;
            }
        }

        protected ProgressBase()
        {
            Id = Guid.NewGuid(); // random id
        }

        protected void ProgressAdd(double value)
        {
            Percentage += value;
        }

        protected void StepDone()
        {
            if (StepCount > 0)
            {
                Percentage += 100.0 / StepCount;
            }
        }


        protected abstract void DoJob();

        protected virtual Task DoJobAsync()
        {
            return Task.Run(() => { });
        }


        object ICloneable.Clone()
        {
            return MemberwiseClone();
        }
    }
}