/* TimePointFormatter.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.Linq;
using System.Text;
using zaaReloaded2.LabModel;

namespace zaaReloaded2.Formatter
{
    /// <summary>
    /// Creates a list of ItemFormatter objects from a TimePoint.
    /// </summary>
    public class TimePointFormatter
    {
        #region Static methods

        /// <summary>
        /// Builds a header paragraph from a Date,
        /// but only if the Date structure has a value.
        /// </summary>
        public static string DateHeader(DateTime date)
        {
            if (date != _nullTimeStamp.Date)
            {
                return FormatHeader(date.ToShortDateString());
            }
            else
            {
                return String.Empty;
            }
        }

        /// <summary>
        /// Builds a header paragraph from a DateTime structure,
        /// but only if the DateTime structure has a value.
        /// </summary>
        public static string DateAndTimeHeader(DateTime dateTime)
        {
            if (dateTime != _nullTimeStamp)
            {
                return FormatHeader(dateTime.ToString());
            }
            else
            {
                return String.Empty;
            }
        }

        #endregion

        #region Private static methods

        static string FormatHeader(string text)
        {
            return String.Format("<style:{0}>Laborwerte vom {1}:{2}<style:{3}>",
                // Environment.NewLine,
                Properties.Settings.Default.StyleHeader,
                text,
                Environment.NewLine,
                Properties.Settings.Default.StyleParagraph
                );
        }

        #endregion

        #region Properties

        /// <summary>
        /// Gets the time stamp of the <see cref="TimePoint"/> from which this
        /// TimePointFormatter was built.
        /// </summary>
        public DateTime TimeStamp { get; private set; }

        /// <summary>
        /// Gets a dictionary of ItemFormatter objects that wrap LabItems.
        /// The QualifiedName of each LabItem is used as key.
        /// </summary>
        public IItemFormatterDictionary ItemFormatters { get; private set; }

        #endregion

        #region Constructor

        /// <summary>
        /// Creates a new TimePointFormatter object using a given
        /// <paramref name="timePoint"/>.
        /// </summary>
        /// <param name="timePoint">TimePoint whose LabItems will be
        /// used to create ItemFormatter objects.</param>
        public TimePointFormatter(TimePoint timePoint,
            ReferenceStyle referenceStyle,
            AbnormalStyle abnormalStyle)
        {
            TimeStamp = timePoint.TimeStamp;
            ItemFormatters = new ItemFormatterDictionary();
            foreach (LabItem item in timePoint.Items.Values)
            {
                ItemFormatters[item.QualifiedName] = new ItemFormatter(
                    item, referenceStyle, abnormalStyle);
            }
        }

        #endregion

        #region Methods

        public bool ContainsItem(string itemName)
        {
            return ItemFormatters.ContainsKey(itemName);
        }

        /// <summary>
        /// Creates a header text line with the time point's date.
        /// </summary>
        /// <returns></returns>
        public string GetDateHeader()
        {
            return DateHeader(TimeStamp);
        }


        /// <summary>
        /// Creates a header text line with the time point's date
        /// and time.
        /// </summary>
        /// <returns></returns>
        public string GetDateAndTimeHeader()
        {
            return DateAndTimeHeader(TimeStamp);
        }

        #endregion

        #region Fields

        static readonly DateTime _nullTimeStamp = new DateTime();

        #endregion
    }
}