using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Geometry;
using KGIS.Framework.AE;
using KGIS.Framework.Utils;
using System;
using System.Collections.Generic;
using System.Drawing;

namespace Kingo.Plugin.EngineEditor.Common
{
    public class ImgDistinguish
    {
        public TilesImage GetImg(IEnvelope pEnvelope)
        {
            TilesImage result = new TilesImage();
            try
            {
                List<ILayer> layers = null;// Env.Instance.KMap.GetAllKOTilesLayer();//有待还原
                if (layers == null)
                    return null;
                List<TilesImage> listImg = new List<TilesImage>();
                foreach (KOTilesLayer layer in layers)
                {
                    TilesImage img = layer.GetImage(pEnvelope);
                    if (img == null)
                        continue;
                    listImg.Add(img);
                }
                if (listImg.Count == 0)
                    return result;
                if (listImg.Count == 1)
                {
                    result = listImg[0];
                }
                else
                {
                    Bitmap bmp = new Bitmap(listImg[0].Img);
                    //合并图片
                    for (int i = 1; i < listImg.Count; i++)
                    {
                        bmp = CombinImage(bmp, listImg[i].Img);
                    }
                    result = listImg[0];
                    result.Img = bmp;
                    //bmp.Save("D://6.png");
                }
            }
            catch (Exception ex)
            {
                LogAPI.Debug("获取Img信息 时异常，异常信息如下：");
                LogAPI.Debug(ex);
                LogAPI.Debug("获取Img信息  时异常信息结束");

                throw ex;
            }
            return result;
        }

        /// <summary>
        /// 合并图片
        /// </summary>
        /// <param name="imgBack"></param>
        /// <param name="img"></param>
        /// <param name="xDeviation"></param>
        /// <param name="yDeviation"></param>
        /// <returns></returns>
        public Bitmap CombinImage(Image imgBack, Image img, int xDeviation = 0, int yDeviation = 0)
        {
            Bitmap bmp = new Bitmap(imgBack.Width, imgBack.Height);
            Graphics g = Graphics.FromImage(bmp);
            g.Clear(Color.Transparent);
            g.DrawImage(imgBack, 0, 0, imgBack.Width, imgBack.Height);
            g.DrawImage(img, imgBack.Width / 2 - img.Width / 2 + xDeviation, imgBack.Height / 2 - img.Height / 2 + yDeviation, img.Width, img.Height);
            GC.Collect();
            return bmp;
        }

    }
}