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

namespace Tango.MachineStudio.Technician.TechItems
{
    /// <summary>
    /// Represents a process parameters table item.
    /// </summary>
    /// <seealso cref="Tango.MachineStudio.Technician.TechItems.TechItem" />
    [TechItem(20, false)]
    public class ProcessParametersItem : TechItem
    {
        public static ObservableCollection<ProcessParametersTable> ProcessParametersTables { get; set; }

        static ProcessParametersItem()
        {
            ProcessParametersTables = new ObservableCollection<ProcessParametersTable>();
        }

        public class ParameterIndex
        {
            public String Name { get; set; }
            public int Index { get; set; }
        }

        private static int _counter = 0;

        public event EventHandler<ProcessParametersTable> PushParametersPressed;

        private ProcessParametersTable _processParameters;
        /// <summary>
        /// Gets or sets the process parameters.
        /// </summary>
        public ProcessParametersTable ProcessParameters
        {
            get { return _processParameters; }
            set { _processParameters = value; RaisePropertyChangedAuto(); }
        }

        /// <summary>
        /// Gets or sets the parameters indices.
        /// </summary>
        public List<ParameterIndex> ParametersIndices { get; set; }

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

        private Rml _selectedResetRml;
        /// <summary>
        /// Gets or sets the selected reset RML.
        /// </summary>
        [XmlIgnore]
        public Rml SelectedResetRML
        {
            get { return _selectedResetRml; }
            set { _selectedResetRml = value; RaisePropertyChangedAuto(); ResetToRMLCommand.RaiseCanExecuteChanged(); }
        }


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

        /// <summary>
        /// Initializes a new instance of the <see cref="ProcessParametersItem"/> class.
        /// </summary>
        public ProcessParametersItem() : base()
        {
            ParametersIndices = new List<ParameterIndex>();
            Name = "Process Parameters";
            Description = "Process parameters table";
            Image = ResourceHelper.GetImageFromResources("Images/process-params.png");
            ProcessParameters = new ProcessParametersTable();
            ProcessParameters.Name = "Process parameters " + _counter++;
            Color = Colors.DodgerBlue;
            PushParametersCommand = new RelayCommand(() => PushParametersPressed?.Invoke(this, ProcessParameters));

            ResetToRMLCommand = new RelayCommand(ResetToRml, () => SelectedResetRML != null);

            if (_counter > 1)
            {
                String name = ProcessParameters.Name;
                ProcessParametersTables.Add(ProcessParameters);
                ProcessParameters.Name = name;
            }
        }

        private void ResetToRml()
        {
            if (SelectedResetRML != null)
            {
                using (ObservablesContext db = ObservablesContext.CreateDefault())
                {
                    var group = db.Adapter.GetRmlActiveProcessParametersTablesGroup(SelectedResetRML.Guid);

                    if (group != null)
                    {
                        var table = group.ProcessParametersTables.OrderBy(x => x.TableIndex).FirstOrDefault();

                        if (table != null)
                        {
                            table.MapPrimitivesTo(ProcessParameters);
                        }
                    }
                }
            }
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="ProcessParametersItem"/> class.
        /// </summary>
        /// <param name="processParameters">The process parameters.</param>
        public ProcessParametersItem(ProcessParametersTable processParameters) : this()
        {

        }

        public override TechItem Clone()
        {
            ProcessParametersItem cloned = base.Clone() as ProcessParametersItem;
            cloned.ProcessParameters = ProcessParameters.Clone();
            cloned.ParametersIndices = ParametersIndices.Select(x => new ParameterIndex() { Index = x.Index, Name = x.Name }).ToList();
            return cloned;
        }

    }
}