using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.DirectX.Direct3D;
using Microsoft.DirectX;
using System.Drawing;

namespace SalsaModel
{
    public class Message3D
    {
        Mesh TextMesh;
        Material TextMaterial;
        Material HiliteMaterial;

        private SizeF ComputeTextBounds(GlyphMetricsFloat[] gmfs)
        {
            float xextent = 0;
            float yextent = 0;

            float offsety = 0;
            foreach (GlyphMetricsFloat gmf in gmfs)
            {
                xextent += gmf.CellIncX;
                float y = offsety + gmf.BlackBoxY;
                if (y > yextent)
                {
                    yextent = y;
                }

                offsety += gmf.CellIncY;
            }

            return new SizeF(xextent, yextent);
        }

        SizeF textSize;

        public Message3D(Device dev, string text)
            : this(dev, text, 0.25f)
        {
        }

        public Message3D(Device dev, string text, float extrusion)
        {
            GlyphMetricsFloat[] metrics;
            TextMesh = Mesh.TextFromFont(dev, new System.Drawing.Font(System.Drawing.FontFamily.GenericSansSerif, 12), text, 0.1f, extrusion, out metrics);
            TextMaterial = new Material();
            TextMaterial.Ambient = Color.WhiteSmoke;
            TextMaterial.Specular = Color.White;
            TextMaterial.SpecularSharpness = 1000f;
            HiliteMaterial = new Material();
            HiliteMaterial.Ambient = Color.HotPink;
            HiliteMaterial.Specular = Color.White;
            HiliteMaterial.SpecularSharpness = 1000f;
            textSize = ComputeTextBounds(metrics);
        }

        public void Draw(Device dev, Location loc, double size)
        {
            Draw(dev, loc, size, false);
        }

        public void Draw(Device dev, Location loc, double size, Material mat)
        {
            //Matrix transform = Matrix.Scaling(50, 50, 50);
            //transform.Translate(BasicDrawing.Vec3(loc));
            dev.Material = mat;
            Matrix transform = Matrix.Identity;
            transform.Multiply(Matrix.Translation(-textSize.Width / 2f, -textSize.Height / 2f, 0.125f));
            transform.Multiply(Matrix.Scaling((float)size, (float)size, (float)size));
            transform.Multiply(Matrix.Translation(BasicDrawing.Vec3(loc)));
            Matrix oldTransform = dev.Transform.World;
            dev.Transform.World = transform;
            TextMesh.DrawSubset(0);
            dev.Transform.World = oldTransform;
        }
        public void DrawStartingAt(Device dev, Location loc, double size, Material mat)
        {
            //Matrix transform = Matrix.Scaling(50, 50, 50);
            //transform.Translate(BasicDrawing.Vec3(loc));
            dev.Material = mat;
            Matrix transform = Matrix.Identity;
            transform.Multiply(Matrix.Translation(0, 0, 0.125f));
            transform.Multiply(Matrix.Scaling((float)size, (float)size, (float)size));
            transform.Multiply(Matrix.Translation(BasicDrawing.Vec3(loc)));
            Matrix oldTransform = dev.Transform.World;
            dev.Transform.World = transform;
            TextMesh.DrawSubset(0);
            dev.Transform.World = oldTransform;
        }

        public void Draw(Device dev, Location loc, double size, bool hilite)
        {
            Draw(dev, loc, size, hilite ? HiliteMaterial : TextMaterial);
        }
    }
}