// <copyright file="RhythmicChange.cs" company="Largo">
// Copyright (c) 2009 All Right Reserved
// </copyright>
// <author> vl </author>
// <email></email>
// <date>2009-01-01</date>
// <summary>Contains ...</summary>

namespace LargoBase.Motives
{
    using LargoBase.Abstract;
    using LargoBase.Enums;
    using System.Diagnostics.Contracts;
    using System.Globalization;
    using System.Text;
    using System.Xml.Linq;

    /// <summary>
    /// Rhythmic Change.
    /// </summary>
    public sealed class RhythmicChange : AbstractChange {
        #region Fields
        /// <summary> Rhythmic motive. </summary>
        private RhythmicMotive rhythmicMotive;
        #endregion

        #region Constructors
        /// <summary>
        /// Initializes a new instance of the <see cref="RhythmicChange"/> class.
        /// </summary>
        [UsedImplicitly]
        public RhythmicChange() {
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="RhythmicChange"/> class.
        /// </summary>
        /// <param name="xchange">The given change.</param>
        public RhythmicChange(XElement xchange)
            : base(xchange) {
                Contract.Requires(xchange != null);
           //// if (xchange == null) {  return;  }

           this.MotiveNumber = XmlSupport.ReadIntegerAttribute(xchange.Attribute("MotiveNumber"));
           this.MotivicChange = (MotivicChangeType)XmlSupport.ReadByteAttribute(xchange.Attribute("MotivicChange"));
           this.MusicalLineType = MusicalLineType.Rhythmic;
           this.ChangeType = MusicalChangeType.Rhythmic;
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="RhythmicChange"/> class.
        /// </summary>
        /// <param name="givenBar">The given bar.</param>
        /// <param name="givenLine">The given line.</param>
        public RhythmicChange(int givenBar, int givenLine)
            : base(givenBar, givenLine, MusicalChangeType.Rhythmic) {
            this.MusicalLineType = MusicalLineType.Rhythmic;
        }
        #endregion

        #region Properties - Xml
        /// <summary>
        /// Gets Xml representation.
        /// </summary>
        /// <value>
        /// Property description.
        /// </value>
        public override XElement GetXElement {
            get {
                var change = base.GetXElement;
                change.Add(new XAttribute("MotiveNumber", this.MotiveNumber ?? 0));
                change.Add(new XAttribute("MotivicChange", (byte)this.MotivicChange));
                return change;
            }
        }
        #endregion

        #region Properties
        /// <summary> Gets or sets class of melodic part. </summary>
        /// <value> Property description. </value>
        public int? MotiveNumber { get; set; }

        /// <summary>
        /// Gets or sets the line letter.
        /// </summary>
        /// <value>
        /// The line letter.
        /// </value>
        public int? LineLetter { get; set; }

        /// <summary>
        /// Gets or sets the motivic change.
        /// </summary>
        /// <value>
        /// The motivic change.
        /// </value>
        public MotivicChangeType MotivicChange { get; set; }

        /// <summary>
        /// Gets or sets TRhythmicMotive.
        /// </summary>
        /// <value> General musical property.</value> 
        public RhythmicMotive RhythmicMotive {
            get {
                if (this.MotiveNumber == null) {
                    return null;
                }

                var isPrepared = this.rhythmicMotive != null;
                if (isPrepared) {
                    return this.rhythmicMotive;
                }
                ////core bool isPrepared = (this.rhythmicMotive != null) && this.rhythmicMotive.Number == this.MotiveNumber 
                ////core     && this.rhythmicMotive.CoreId == this.BlockModel.RhythmicCore.Id;
                ////core if (isPrepared) {  return this.rhythmicMotive;  }

                //// if (this.HasModel) {
                ////     this.rhythmicMotive = this.BlockModel.Core.RhythmicCore.GetRhythmicMotive((int)this.MotiveNumber);
                //// }

                return this.rhythmicMotive;
            }

            set => this.rhythmicMotive = value;
        }
       
        #endregion

        #region Static factory methods

        /// <summary>
        /// Gets the new end rhythmic change.
        /// </summary>
        /// <param name="barNumber">The bar number.</param>
        /// <param name="lineIndex">The line number.</param>
        /// <returns> Returns object. </returns>
        public static RhythmicChange GetNewRhythmicStopChange(int barNumber, byte lineIndex) {
            Contract.Ensures(Contract.Result<RhythmicChange>() != null);

            var change = new RhythmicChange(barNumber, lineIndex) { 
                MotivicChange = MotivicChangeType.MainMotiveStop 
            };

            return change;
        }

        #endregion

        #region Public methods
        /// <summary>
        /// Clones this instance.
        /// </summary>
        /// <returns> Returns object. </returns>
        public override object Clone() {
            var tmc = new RhythmicChange(this.BarNumber, this.LineIndex) {
                MotiveNumber = this.MotiveNumber,
                MotivicChange = this.MotivicChange
            };
            //// tmc.BlockModel = this.BlockModel;

            return tmc;
        }
        #endregion

        #region String representation

        /// <summary> String representation of the object. </summary>
        /// <returns> Returns value. </returns>
        public override string ToString() {
            var s = new StringBuilder();
            s.AppendFormat(CultureInfo.CurrentCulture, base.ToString());
            s.Append(", Motive " + this.MotiveNumber);
            return s.ToString();
        }
        #endregion
    }
}