using System;
using System.Drawing;
using System.IO;
using System.Net;

namespace WWTWebservices
{
    public class WMSImage
    {
        double raMin;
        double decMax;
        double raMax;
        double decMin;
        private const double D2R = 0.017453292519943295;
        private double decCenter;
        private FastBitmap fastImage;
        public Bitmap image;
        private const double ImageSizeX = 512.0;
        private const double ImageSizeY = 512.0;
        private double raCenter;
        private double scaleX;
        private double scaleY;

        private double xoff;
        private double yoff;


        public WMSImage(double raMin, double decMax, double raMax, double decMin)
        {
            this.raMin = raMin;
            this.decMin = decMin;
            this.raMax = raMax;
            this.decMax = decMax;
            scaleX = (this.raMax - this.raMin) / 512;
            scaleY = (this.decMax - this.decMin) / 512;
        }


        public string LoadImage(string url, bool debug)
        {
            object[] args = new object[] { (raMin - 180), decMin, (raMax - 180), decMax, 512.0, 512.0, url };
            string address = string.Format("http://onmoon.jpl.nasa.gov/browse.cgi?WIDTH={4}&HEIGHT={5}&layers=Clementine&styles=&srs=IAU2000:30100&format=image/jpeg&bbox={0},{1},{2},{3}", args);
            //	string address = string.Format("http://ms.mars.asu.edu/?REQUEST=GetMap&SERVICE=WMS&VERSION=1.1.1&LAYERS={6}&STYLES=&FORMAT=image/png&BGCOLOR=0x000000&TRANSPARENT=FALSE&SRS=JMARS:1&BBOX={0},{1},{2},{3}&WIDTH={4}&HEIGHT={5}&reaspect=false", args);
            //	string address = string.Format("http://wms.jpl.nasa.gov/wms.cgi?request=GetMap&layers=BMNG&srs=EPSG:4326&format=image/jpeg&styles=&BBOX={0},{1},{2},{3}&WIDTH={4}&HEIGHT={5}", args);
            //	string address = url+string.Format("BBOX={0},{1},{2},{3}&WIDTH={4}&HEIGHT={5}", args);

            if (debug) return address;
            Stream stream = new WebClient().OpenRead(address);
            this.image = new Bitmap(stream);
            return address;
        }

        public void Lock()
        {
            this.fastImage = new FastBitmap(this.image);
            this.fastImage.LockBitmap();
        }

        public void Unlock()
        {
            if (this.fastImage != null)
            {
                this.fastImage.UnlockBitmap();
                this.fastImage.Dispose();
                this.fastImage = null;
            }
        }

        public PixelData GetPixelDataAtRaDec(Vector2d raDec)
        {
            double x = Math.Max(0, Math.Min((raDec.X - raMin) / this.scaleX, 511));
            double y = Math.Max(0, Math.Min(511 - (raDec.Y - decMin) / this.scaleY, 511));



            return this.fastImage.GetFilteredPixel(x, y);
        }

        public string GetPixelDataAtRaDecString(Vector2d raDec)
        {
            double x = (raDec.X - raMin) / this.scaleX;
            double y = (raDec.Y - decMin) / this.scaleY;

            return string.Format("x={0},y={1}, scaleX={2}, scaleY={3}", x, y, scaleX, scaleY);

            //return this.fastImage.GetFilteredPixel(x,y);
        }

    }
}