using System;
using System.ComponentModel;
using System.Collections.Generic;
using System.Diagnostics;
using System.Text;
using System.Drawing;
using System.Drawing.Drawing2D;
using FastReport.Utils;

namespace FastReport.Map
{
    /// <summary>
    /// Represents a line shape.
    /// </summary>
    public class ShapePolyLine : ShapePolygon
    {
        #region Public Methods
        /// <inheritdoc/>
        public override void Draw(FRPaintEventArgs e)
        {
            if (!IsVisible())
                return;

            float left = Map.AbsLeft + Map.OffsetXG;
            float top = Map.AbsTop + Map.OffsetYG;
            double minX = Layer.Box.MinX;
            double maxY = Layer.Box.MaxY;
            double w2 = Box.MinX + (Box.MaxX - Box.MinX) / 2;
            double h2 = Box.MinY + (Box.MaxY - Box.MinY) / 2;
            double addx = -w2 * ShapeScale + w2 + ShapeOffsetX;
            double addy = -h2 * ShapeScale + h2 + ShapeOffsetY;
            float scale = Map.ScaleG;
            ShapeStyle style = Layer.DefaultShapeStyle;

            using (GraphicsPath path = new GraphicsPath())
            {
                foreach (PointD[] part in Parts)
                {
                    List<PointF> points = new List<PointF>();
                    foreach (PointD point in part)
                    {
                        PointF pt = new PointF(
                          (left + CoordinateConverter.GetX(point.X * ShapeScale + addx, minX, scale)) * e.ScaleX,
                          (top + CoordinateConverter.GetY(point.Y * ShapeScale + addy, maxY, scale, Map.MercatorProjection)) * e.ScaleY);
                        if (points.Count > 0 && DistanceBetweenPoints(pt, points[points.Count - 1]) < Layer.Accuracy)
                            continue;
                        points.Add(pt);
                    }

                    if (points.Count >= 2)
                    {
                        PointF[] poly = points.ToArray();
                        path.AddLines(poly);
                    }
                }

                Pen pen = e.Cache.GetPen(style.BorderColor, style.BorderWidth * e.ScaleX, style.BorderStyle, LineJoin.Bevel);
                e.Graphics.DrawPath(pen, path);
            }
        }

        /// <inheritdoc/>
        public override void DrawLabel(FRPaintEventArgs e)
        {
        }

        /// <inheritdoc/>
        public override bool HitTest(PointF point)
        {
            if (GetBBox().Contains(point))
                return true;
            return false;
        }
        #endregion // Public Methods

        /// <summary>
        /// Initializes a new instance of the <see cref="ShapePolyLine"/> class.
        /// </summary>
        public ShapePolyLine()
        {
            BaseName = "Line";
        }
    }
}