///
/// Copyright (c) 2013-2015 Sensus Metering Systems
///
using System;
using System.Collections.Generic;
using log4net;
using TBF.BenchControl.GenericDevices;

namespace TBF.BenchControl.Operations
{
    public class SetAllRegulValvesOp : IOperation
    {
        private static readonly ILog log = LogManager.GetLogger(typeof(SetAllRegulValvesOp));
        public override string ToString() { return string.Format("SetAllRegulValvesOp()"); }

        IList<IRegulValve> regulValves;
        int rvCount;
        IOperation[] setRVPosOps;

        public SetAllRegulValvesOp(IList<IRegulValve> regulValves, string encodedPositions, int timeout)
        {
            if (regulValves == null) throw new ArgumentNullException("regulValves");
            this.regulValves = regulValves;
            rvCount = regulValves.Count;

            // Parse the positions
            float[] positions = new float[rvCount];
            string[] rvPosStr = (encodedPositions != null) ? encodedPositions.Split(new char[] { ';' }) : new string[0];
            for (int i = 0; i < Math.Min(rvCount, rvPosStr.Length); i++)
            {
                float posPct;
                if (float.TryParse(rvPosStr[i], out posPct) && posPct >= 0 && posPct <= 100.0f)
                {
                    positions[i] = posPct;
                }
            }
            setRVPosOps = new IOperation[rvCount];
            for (int i = 0; i < rvCount; i++)
            {
                float posLo = Math.Max(positions[i] - 5.0f, 0);
                float posHi = Math.Min(positions[i] + 5.0f, 100.0f);
                setRVPosOps[i] = regulValves[i].SetRegulValvePositionOp(posLo, posHi, timeout);
            }
        }

        /// <summary>Start this operation</summary>
        public void Start()
        {
            for (int i = 0; i < rvCount; i++) setRVPosOps[i].Start();
        }

        /// <summary>Run this operation</summary>
        public Event Run()
        {
            bool allDone = true;
            bool anyError = false;
            bool anyTimeout = false;

            for (int i = 0; i < rvCount; i++)
            {
                Event evnt = setRVPosOps[i].Run();
                if (evnt == Event.Error) anyError = true;
                else if (evnt == Event.RegulValveTimeOut) anyTimeout = true;
                else if (evnt != Event.PositionReached) allDone = false;
            }

            if (anyError) return Event.Error;
            if (anyTimeout) return Event.Error;
            if (allDone) return Event.AllPositionsReached;
            return Event.None;
        }

        /// <summary>Stop this operation</summary>
        public void Stop()
        {
            for (int i = 0; i < rvCount; i++) setRVPosOps[i].Stop();
        }
    }
}