using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Media;
using System.Xml.Serialization;
using Tango.BL.Entities;
using Tango.SharedUI.Helpers;

namespace Tango.MachineStudio.Technician.TechItems
{
    /// <summary>
    /// Represents an analog style integer monitor item.
    /// </summary>
    /// <seealso cref="Tango.MachineStudio.Technician.TechItems.TechItem" />
    [TechItem(2, true)]
    public class MonitorItem : TechItem
    {
        private String _format;

        private TechMonitor _techMonitor;
        /// <summary>
        /// Gets or sets the db tech monitor.
        /// </summary>
        [XmlIgnore]
        public TechMonitor TechMonitor
        {
            get { return _techMonitor; }
            set { _techMonitor = value; RaisePropertyChangedAuto(); TechName = _techMonitor != null ? _techMonitor.Description : null; ItemGuid = value != null ? value.Guid : null; }
        }

        private double _value;
        /// <summary>
        /// Gets or sets the current value.
        /// </summary>
        [XmlIgnore]
        public double Value
        {
            get { return _value; }
            set
            {
                _value = Math.Round(value, DecimalPoints);
                RaisePropertyChanged(nameof(Value));
                RaisePropertyChanged(nameof(ValueString));
                LastUpdateTime = DateTime.Now;
            }
        }

        public String ValueString
        {
            get
            {
                return _value.ToString($"F{DecimalPoints}");
            }
        }

        private int _updateInterval;
        /// <summary>
        /// Gets or sets the update interval.
        /// </summary>
        public int UpdateInterval
        {
            get { return _updateInterval; }
            set { _updateInterval = value; RaisePropertyChangedAuto(); }
        }

        private int _decimalPoints;
        /// <summary>
        /// Gets or sets the decimal points.
        /// </summary>
        public int DecimalPoints
        {
            get { return _decimalPoints; }
            set
            {
                _decimalPoints = value; RaisePropertyChangedAuto();

                if (_decimalPoints > 0)
                {
                    _format = "0." + String.Join("", Enumerable.Range(0, DecimalPoints).Select(x => "#"));
                }
                else
                {
                    _format = "0";
                }
            }
        }


        /// <summary>
        /// Gets or sets the last update time.
        /// </summary>
        [XmlIgnore]
        public DateTime LastUpdateTime { get; set; }

        /// <summary>
        /// Initializes a new instance of the <see cref="MonitorItem"/> class.
        /// </summary>
        public MonitorItem() : base()
        {
            Name = "Monitor";
            Color = Colors.White;
            Description = "Simple analogue monitor";
            Image = ResourceHelper.GetImageFromResources("Images/analog.png");
            LastUpdateTime = DateTime.Now;
            UpdateInterval = 10;
            DecimalPoints = 2;
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="MonitorItem"/> class.
        /// </summary>
        /// <param name="techMonitor">The db tech monitor.</param>
        public MonitorItem(TechMonitor techMonitor) : this()
        {
            TechMonitor = techMonitor;
        }

        /// <summary>
        /// Clones this instance.
        /// </summary>
        /// <returns></returns>
        public override TechItem Clone()
        {
            MonitorItem cloned = base.Clone() as MonitorItem;
            cloned.TechMonitor = TechMonitor;
            cloned.UpdateInterval = UpdateInterval;
            cloned.DecimalPoints = DecimalPoints;
            return cloned;
        }
    }
}