/* TimePoint.cs
 * part of zaaReloaded2
 * 
 * Copyright 2015-2017 Daniel Kraus
 * 
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using zaaReloaded2.Thesaurus;

namespace zaaReloaded2.LabModel
{
    /// <summary>
    /// Holds laboratory items for a given time point.
    /// </summary>
    public class TimePoint
    {
        #region Properties

        /// <summary>
        /// Gets the date and time information for this TimePoint.
        /// If IsValidTimePoint is false, the value of TimeStamp
        /// is undefined.
        /// </summary>
        public DateTime TimeStamp { get; set; }

        /// <summary>
        /// Returns a sorted dictionary of all <see cref="LabItem"/>s found in
        /// the <see cref="LaurisText"/>. If a laboratory parameter occurs more
        /// than once, only the last occurrence is saved.
        /// </summary>
        public IItemDictionary Items { get; private set; }

        #endregion

        #region Constructor

        public TimePoint()
        {
            Items = new ItemDictionary();
        }

        #endregion

        #region Methods

        /// <summary>
        /// Adds an item to the TimePoint.
        /// </summary>
        /// <param name="item">LabItem to add.</param>
        public void AddItem(LabItem item)
        {
            if (String.IsNullOrEmpty(item.QualifiedName))
            {
                Logger.Fatal("Cannot add item without QualifiedName!");
                throw new ArgumentException("Cannot add item that has no qualified name.");
            }
            Items.Add(item.QualifiedName, item);
        }

        /// <summary>
        /// Adds the items from another time point to this
        /// time point. There is no check for plausibility,
        /// i.e. the other time point may have a different
        /// time stamp.
        /// </summary>
        /// <param name="otherTimePoint">Other TimePoint to
        /// merge into the current one.</param>
        public void MergeItems(TimePoint otherTimePoint)
        {
            if (otherTimePoint == null)
            {
                Logger.Fatal("Cannot merge null!");
                throw new ArgumentNullException("otherTimePoint");
            }
            Items.Merge(otherTimePoint.Items);
        }

        /// <summary>
        /// Returns true if <see cref="Items"/> contains a given
        /// item.
        /// </summary>
        /// <param name="item">Item string to look for.</param>
        /// <returns>True if <see cref="Items"/> contains <paramref name="item."/>
        /// </returns>
        public bool ContainsItem(string item)
        {
            return Items.ContainsKey(item);
        }

        public virtual void Parse(string paragraph)
        {
            NotImplementedException e = new NotImplementedException("Cannot parse paragraph in base class - derived class must override Parse");
            Logger.Fatal(e);
            throw e;
        }

        #endregion

        #region Class logger

        private static NLog.Logger Logger { get { return _logger.Value; } }

        private static readonly Lazy<NLog.Logger> _logger = new Lazy<NLog.Logger>(() => NLog.LogManager.GetCurrentClassLogger());

        #endregion
    }
}