using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using DevComponents.DotNetBar.Charts.Style;

namespace DevComponents.DotNetBar.Charts
{
    /// <summary>
    /// Represents a PieLabel (label associated with a pie data slice in the chart).
    /// </summary>
    public class PieLabel : IDisposable
    {
        #region Private data

        private PieSeriesPoint _PieSeriesPoint;

        private float _Angle;
        private Rectangle _Bounds;
        private Rectangle _ConnectorBounds;

        private Point _PtBoxEdge;
        private Point _PtBoxBend;
        private Point _PtSliceEdge;

        private double _Radius;
        private double _OuterRadius;

        private string _Label;
        private Size _LabelSize;

        private SliceOuterLabelVisualStyle _SliceLabelVisualStyle;

        private States _States;

        #endregion

        public PieLabel(PieSeriesPoint sp, string label)
        {
            _PieSeriesPoint = sp;
            _Label = label;

            InitDefaultStates();
        }

        #region InitDefaultStates

        private void InitDefaultStates()
        {
        }

        #endregion

        #region Public properties

        #region Angle

        /// <summary>
        /// Gets the angle used to display the point label 
        /// associated with the data point.
        /// </summary>
        public float Angle
        {
            get { return (_Angle); }
            internal set { _Angle = value; }
        }

        #endregion

        #region Bounds

        /// <summary>
        /// Gets the label text bounds.
        /// </summary>
        public Rectangle Bounds
        {
            get { return (_Bounds); }
            internal set { _Bounds = value; }
        }

        #endregion

        #region IsLeftlabel

        /// <summary>
        /// Gets whether the label is a left positioned
        /// label (with respect to the chart slice).
        /// </summary>
        public bool IsLeftlabel
        {
            get { return (!TestState(States.RightLabel)); }
            internal set { SetState(States.RightLabel, !value); }
        }

        #endregion

        #region IsRightlabel

        /// <summary>
        /// Gets whether the label is a right positioned
        /// label (with respect to the chart slice).
        /// </summary>
        public bool IsRightlabel
        {
            get { return (TestState(States.RightLabel)); }
            internal set { SetState(States.RightLabel, value); }
        }

        #endregion

        #region Label

        /// <summary>
        /// Gets or sets the label text
        /// </summary>
        public string Label
        {
            get { return (_Label); }
            internal set { _Label = value; }
        }

        #endregion

        #region LabelSize

        /// <summary>
        /// Gets the label size.
        /// </summary>
        public Size LabelSize
        {
            get { return (_LabelSize); }
            internal set { _LabelSize = value; }
        }

        #endregion

        #region PieSeriesPoint

        /// <summary>
        /// Gets the associated PieSeriesPoint.
        /// </summary>
        public PieSeriesPoint PieSeriesPoint
        {
            get { return (_PieSeriesPoint); }
            internal set { _PieSeriesPoint = value; }
        }

        #endregion

        #region PtBoxBend

        /// <summary>
        /// Gets the middle connector point located
        /// at the 'bend' of the connector.
        /// </summary>
        public Point PtBoxBend
        {
            get { return (_PtBoxBend); }
            internal set { _PtBoxBend = value; }
        }

        #endregion

        #region PtBoxEdge

        /// <summary>
        /// Gets the connector point located and the
        /// 'edge' of the label text bounding box.
        /// </summary>
        public Point PtBoxEdge
        {
            get { return (_PtBoxEdge); }
            internal set { _PtBoxEdge = value; }
        }

        #endregion

        #region PtSliceEdge

        /// <summary>
        /// Gets the initial connector point, located at
        /// the edge of the pie slice.
        /// </summary>
        public Point PtSliceEdge
        {
            get { return (_PtSliceEdge); }
            internal set { _PtSliceEdge = value; }
        }

        #endregion

        #region SliceLabelVisualStyle

        /// <summary>
        /// Gets the current slice label VisualStyle for the label.
        /// </summary>
        public SliceOuterLabelVisualStyle LabelStyle
        {
            get { return (_SliceLabelVisualStyle); }
            internal set { _SliceLabelVisualStyle = value; }
        }

        #endregion

        #endregion

        #region Internal properties

        #region ConnectorBounds

        internal Rectangle ConnectorBounds
        {
            get { return (_ConnectorBounds); }
            set { _ConnectorBounds = value; }
        }

        #endregion

        #region OuterRadius

        internal double OuterRadius
        {
            get { return (_OuterRadius); }
            set { _OuterRadius = value; }
        }

        #endregion

        #region Radius

        internal double Radius
        {
            get { return (_Radius); }
            set { _Radius = value; }
        }

        #endregion

        #endregion

        #region States

        [Flags]
        private enum States : uint
        {
            RightLabel = (1U << 0),
        }

        #region TestState

        private bool TestState(States state)
        {
            return ((_States & state) == state);
        }

        #endregion

        #region SetState

        private void SetState(States state, bool value)
        {
            if (value == true)
                _States |= state;
            else
                _States &= ~state;
        }

        #endregion

        #endregion

        #region IDisposable

        public void Dispose()
        {
        }

        #endregion
    }
}