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 a single component value controller and monitor.
    /// </summary>
    /// <seealso cref="TechItem" />
    [TechItem(10)]
    public class ControllerItem : TechItem
    {
        /// <summary>
        /// Occurs when the controller value has changed.
        /// </summary>
        public event EventHandler<double> ValueChanged;

        private TechController _techController;
        /// <summary>
        /// Gets or sets the DB controller item.
        /// </summary>
        [XmlIgnore]
        public TechController TechController
        {
            get { return _techController; }
            set
            {
                _techController = value;
                RaisePropertyChangedAuto();
                TechName = _techController != null ? _techController.Description : null; ItemGuid = value != null ? value.Guid : null;

                if (_techController != null && !IsSetToDefault)
                {
                    OptimalRangeMinimum = _techController.Min;
                    OptimalRangeMaximum = _techController.Min + ((_techController.Max - _techController.Min) * 0.7d);
                    IsSetToDefault = true;
                }
            }
        }

        private double _value;
        /// <summary>
        /// Gets or sets the component value.
        /// </summary>
        [XmlIgnore]
        public double Value
        {
            get { return _value; }
            set
            {
                _value = value; RaisePropertyChangedAuto();
                ValueChanged?.Invoke(this, _value);
            }
        }

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

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

        private double _effectiveValue;
        /// <summary>
        /// Gets or sets the effective value received from the embedded device.
        /// </summary>
        [XmlIgnore]
        public double EffectiveValue
        {
            get { return _effectiveValue; }
            set
            {
                LastUpdateTime = DateTime.Now;

                if (_effectiveValue != value)
                {
                    _effectiveValue = value;
                    RaisePropertyChangedAuto();
                }
            }
        }

        private double _optimalRangeMinimum;
        /// <summary>
        /// Gets or sets the optimal range.
        /// </summary>
        public double OptimalRangeMinimum
        {
            get { return _optimalRangeMinimum; }
            set
            {
                _optimalRangeMinimum = value;
                RaisePropertyChangedAuto();
            }
        }

        private double _optimalRangeMaximum;
        public double OptimalRangeMaximum
        {
            get { return _optimalRangeMaximum; }
            set { _optimalRangeMaximum = value; RaisePropertyChangedAuto(); }
        }

        public bool IsSetToDefault { get; set; }

        /// <summary>
        /// Initializes a new instance of the <see cref="ControllerItem"/> class.
        /// </summary>
        public ControllerItem() : base()
        {
            Name = "Value Controller";
            Description = "Single component value controller";
            Image = ResourceHelper.GetImageFromResources("Images/controller.png");
            Color = Colors.DodgerBlue;
            LastUpdateTime = DateTime.Now;
            UpdateInterval = 10;
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="ControllerItem"/> class.
        /// </summary>
        /// <param name="techController">The db tech controller.</param>
        public ControllerItem(TechController techController) : this()
        {
            TechController = techController;
        }

        /// <summary>
        /// Clones this instance.
        /// </summary>
        /// <returns></returns>
        public override TechItem Clone()
        {
            ControllerItem cloned = base.Clone() as ControllerItem;
            cloned.TechController = TechController;
            cloned.OptimalRangeMinimum = OptimalRangeMinimum;
            cloned.OptimalRangeMaximum = OptimalRangeMaximum;
            cloned.IsSetToDefault = IsSetToDefault;
            
            return cloned;
        }
    }
}