//-----------------------------------------------------------------------
// -----------------------------------------------------------------------
// file="CrossFramePipelineNode"
// Project: StgSharp
// AuthorGroup: Nitload
// Copyright (c) Nitload. All rights reserved.
//     
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//     
// -----------------------------------------------------------------------
// -----------------------------------------------------------------------
using StgSharp.PipeLine;

using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace StgSharp.PipeLine
{
    public class CrossFrameOperation : IConvertableToPipelineNode
    {

        private static string[] _inputName = [ "TaskIn" ];
        private static string[] _outputName = [ "TaskOut" ];
        private Action _mainExecution;
        private int currentCount;
        private readonly int cycleCount;

        public CrossFrameOperation(Action startup, int cycleCount)
        {
            MainExecution = startup;
            this.cycleCount = (cycleCount > 1) ?
                              cycleCount :
                              throw new ArgumentException(
                        $"{$"The {typeof(CrossFrameOperation).Name} crosses only one cycle, "}{$"please use a {typeof(PipelineNode).Name} instead."}");
            this.cycleCount = cycleCount;
            currentCount = cycleCount;
        }

        public Action MainExecution
        {
            get => _mainExecution;
            private protected set => _mainExecution = value;
        }

        public IEnumerable<string> InputPortName => _inputName;

        public IEnumerable<string> OutputPortName => _outputName;

        public PipelineNodeOperation Operation
        {
            get => NodeMain;
        }

        public void NodeMain(
                    in Dictionary<string, PipelineNodeInPort> input,
                    in Dictionary<string, PipelineNodeOutPort> output)
        {
            if (currentCount < cycleCount)
            {
                Interlocked.Increment(ref currentCount);
            } else
            {
                Interlocked.Exchange(ref currentCount, 0);
                Task.Run(MainExecution);
            }

            // Console.WriteLine(currentCount);
            PipelineNodeOutPort.SkipAll(output);
        }

    }
}