//******************************************************************************************************
//  Historians.cs - Gbtc
//
//  Copyright © 2012, Grid Protection Alliance.  All Rights Reserved.
//
//  Licensed to the Grid Protection Alliance (GPA) under one or more contributor license agreements. See
//  the NOTICE file distributed with this work for additional information regarding copyright ownership.
//  The GPA licenses this file to you under the MIT License (MIT), the "License"; you may
//  not use this file except in compliance with the License. You may obtain a copy of the License at:
//
//      http://www.opensource.org/licenses/MIT
//
//  Unless agreed to in writing, the subject software distributed under the License is distributed on an
//  "AS-IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. Refer to the
//  License for the specific language governing permissions and limitations.
//
//  Code Modification History:
//  ----------------------------------------------------------------------------------------------------
//  05/02/2011 - Mehulbhai P Thakkar
//       Generated original version of source code.
//  12/20/2012 - Starlynn Danyelle Gilliam
//       Modified Header.
//
//******************************************************************************************************

using System;
using System.Collections.Generic;
using System.Windows;
using System.Windows.Input;
using GSF.TimeSeries.UI.Commands;
using GSF.TimeSeries.UI.DataModels;

namespace GSF.TimeSeries.UI.ViewModels
{
    /// <summary>
    /// Class to hold bindable <see cref="Historian"/> collection and current selection information for UI.
    /// </summary>
    internal class Historians : PagedViewModelBase<Historian, int>
    {
        #region [ Members ]

        // Fields
        private Dictionary<Guid, string> m_nodeLookupList;
        private RelayCommand m_initializeCommand;
        private string m_runtimeID;

        #endregion

        #region [ Properties ]

        public string RuntimeID
        {
            get
            {
                return m_runtimeID;
            }
            set
            {
                m_runtimeID = value;
                OnPropertyChanged("RuntimeID");
            }
        }

        /// <summary>
        /// Gets flag that determines if <see cref="PagedViewModelBase{T1, T2}.CurrentItem"/> is a new record.
        /// </summary>
        public override bool IsNewRecord
        {
            get
            {
                return CurrentItem.ID == 0;
            }
        }

        /// <summary>
        /// Gets <see cref="Dictionary{T1,T2}"/> type collection of <see cref="Node"/> defined in the database.
        /// </summary>
        public Dictionary<Guid, string> NodeLookupList
        {
            get
            {
                return m_nodeLookupList;
            }
        }

        public ICommand InitializeCommand
        {
            get
            {
                if (m_initializeCommand == null)
                    m_initializeCommand = new RelayCommand(InitializeHistorian, () => CanSave);

                return m_initializeCommand;
            }
        }

        #endregion

        #region [ Constructor ]

        /// <summary>
        /// Creates an instance of <see cref="Historians"/> class.
        /// </summary>
        /// <param name="itemsPerPage">Integer value to determine number of items per page.</param>
        /// <param name="autoSave">Boolean value to determine is user changes should be saved automatically.</param>
        public Historians(int itemsPerPage, bool autoSave = true)
            : base(itemsPerPage, autoSave)
        {
        }

        #endregion

        #region [ Methods ]

        /// <summary>
        /// Gets the primary key value of the <see cref="PagedViewModelBase{T1, T2}.CurrentItem"/>.
        /// </summary>
        /// <returns>The primary key value of the <see cref="PagedViewModelBase{T1, T2}.CurrentItem"/>.</returns>
        public override int GetCurrentItemKey()
        {
            return CurrentItem.ID;
        }

        /// <summary>
        /// Gets the string based named identifier of the <see cref="PagedViewModelBase{T1, T2}.CurrentItem"/>.
        /// </summary>
        /// <returns>The string based named identifier of the <see cref="PagedViewModelBase{T1, T2}.CurrentItem"/>.</returns>
        public override string GetCurrentItemName()
        {
            return CurrentItem.Name;
        }

        /// <summary>
        /// Initialization to be done before the initial call to <see cref="PagedViewModelBase{T1,T2}.Load"/>.
        /// </summary>
        public override void Initialize()
        {
            base.Initialize();
            m_nodeLookupList = Node.GetLookupList(null);
        }

        protected override void OnPropertyChanged(string propertyName)
        {
            base.OnPropertyChanged(propertyName);

            if (propertyName == "CurrentItem")
            {
                if (CurrentItem == null)
                    RuntimeID = string.Empty;
                else
                    RuntimeID = CommonFunctions.GetRuntimeID("Historian", CurrentItem.ID);
            }
        }

        private void InitializeHistorian()
        {
            try
            {
                if (Confirm("Do you want to Initialize " + GetCurrentItemName() + "?", "Confirm Initialize"))
                {
                    Popup(CommonFunctions.SendCommandToService("Initialize " + RuntimeID), "Initialize", MessageBoxImage.Information);
                }
            }
            catch (Exception ex)
            {
                Popup("ERROR: " + ex.Message, "Failed To Initialize", MessageBoxImage.Error);
            }
        }

        #endregion
    }
}