using System;
using System.Xml;
using Aitex.Core.RT.IOCore;

namespace Aitex.Core.RT.Device.Unit
{
    public class IoPlcDateTime : BaseDevice, IDevice
    {
        private AIAccessor _aiYear;
        private AIAccessor _aiMonth;
        private AIAccessor _aiDay;
        private AIAccessor _aiHour;
        private AIAccessor _aiMinute;
        private AIAccessor _aiSecond;
        public const int YEAR_OFFSET = 2000;

        public DateTime CurrentDateTime
        {
            get
            {
                if (Year == 0 && Month == 0 && Day == 0 && Hour == 0 && Minute == 0 && Second == 0)
                    return DateTime.Now;
                return new DateTime(Year, Month, Day, Hour, Minute, Second);
            }
        }

        public bool IsValid
        {
            get
            {
                return !(Year == -1 || Month == -1 || -1 == Day || -1 == Hour || -1 == Minute || -1 == Second);
            }
        }

        public int Year
        {
            get
            {
                int res = -1;

                if (_aiYear != null)
                {
                    float a = (_aiYear.Value > 0 && _aiYear.Value < 100) ? (_aiYear.Value + YEAR_OFFSET) : _aiYear.Value;
                    res = (int)a;
                }
                return res;
            }
        }

        public int Month  => _aiMonth == null ? -1 : (int)_aiMonth.Value;
        public int Day    => _aiDay == null ? -1 : (int)_aiDay.Value;
        public int Hour   => _aiHour == null ? -1 : (int)_aiHour.Value;
        public int Minute => _aiMinute == null ? -1 : (int)_aiMinute.Value;
        public int Second => _aiSecond == null ? -1 : (int)_aiSecond.Value;

        public IoPlcDateTime(string module, XmlElement node)
        {
            base.Module   = module;
            base.Name     = node.GetAttribute("id");
            base.Display  = node.GetAttribute("display");
            base.DeviceID = node.GetAttribute("schematicId");

            _aiYear       = ParseAiNode("aiYear", node);
            _aiMonth      = ParseAiNode("aiMonth", node);
            _aiDay        = ParseAiNode("aiDay", node);
            _aiHour       = ParseAiNode("aiHour", node);
            _aiMinute     = ParseAiNode("aiMinute", node);
            _aiSecond     = ParseAiNode("aiSecond", node);
        }

        public bool Initialize() { return true;}
        public void Terminate()  { }
        public void Monitor()    { }
        public void Reset()      { }
    }
}