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.Core.Commands;
using Tango.PMR.Diagnostics;
using Tango.SharedUI.Helpers;

namespace Tango.MachineStudio.Technician.TechItems
{
    /// <summary>
    /// Represents a heater controller.
    /// </summary>
    /// <seealso cref="Tango.MachineStudio.Technician.TechItems.TechItem" />
    [TechItem(10)]
    public class HeaterItem : TechItem
    {
        public event Action SetCommandClicked;

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

        /// <summary>
        /// Gets or sets the set command.
        /// </summary>
        [XmlIgnore]
        public RelayCommand SetCommand { get; set; }

        /// <summary>
        /// Initializes a new instance of the <see cref="HeaterItem"/> class.
        /// </summary>
        public HeaterItem() : base()
        {
            Name = "Heater Controller";
            Color = Colors.White;
            Description = "Heater Controller";
            Image = ResourceHelper.GetImageFromResources("Images/heater-controller.png");
            SetCommand = new RelayCommand(() => 
            {
                SetCommandClicked?.Invoke();
                IsEditing = false;
            }, (x) => HeaterState.CurrentValue != SetPoint);
            HeaterState = new HeaterState();
        }

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

        private HeaterState _heaterState;
        /// <summary>
        /// Gets or sets the state of the heater.
        /// </summary>
        public HeaterState HeaterState
        {
            get { return _heaterState; }
            set
            {
                _heaterState = value;
                RaisePropertyChangedAuto();

                if (!IsEditing)
                {
                    SetPoint = _heaterState.SetPoint;
                }

                InvokeUI(() =>
                {
                    SetCommand.RaiseCanExecuteChanged();
                });
            }
        }

        private double _setPoint;
        /// <summary>
        /// Gets or sets the set point.
        /// </summary>
        public double SetPoint
        {
            get { return _setPoint; }
            set { _setPoint = value; RaisePropertyChangedAuto(); }
        }

        private bool _isEditing;
        [XmlIgnore]
        public bool IsEditing
        {
            get { return _isEditing; }
            set { _isEditing = value; RaisePropertyChangedAuto(); }
        }


        /// <summary>
        /// Clones this instance.
        /// </summary>
        /// <returns></returns>
        public override TechItem Clone()
        {
            HeaterItem cloned = base.Clone() as HeaterItem;
            cloned.TechHeater = TechHeater;
            return cloned;
        }
    }
}