using System;
using ClassicalSharp.GraphicsAPI;
using OpenTK;

namespace ClassicalSharp.Model {

	public class CreeperModel : IModel {
		
		public CreeperModel( Game window ) : base( window ) {
			vertices = new ModelVertex[partVertices * 6];
			Head = MakeHead();
			Torso = MakeTorso();
			LeftLegFront = MakeLeg( -4/16f, 0, -6/16f, -2/16f );
			RightLegFront = MakeLeg( 0, 4/16f, -6/16f, -2/16f );
			LeftLegBack = MakeLeg( -4/16f, 0, 2/16f, 6/16f );
			RightLegBack = MakeLeg( 0, 4/16f, 2/16f, 6/16f );
		}
		
		ModelPart MakeHead() {
			return MakePart( 0, 0, 8, 8, 8, 8, 8, 8, -4/16f, 4/16f, 18/16f, 26/16f, -4/16f, 4/16f, false );
		}
		
		ModelPart MakeTorso() {
			return MakePart( 16, 16, 4, 12, 8, 4, 8, 12, -4/16f, 4/16f, 6/16f, 18/16f, -2/16f, 2/16f, false );
		}
		
		ModelPart MakeLeg( float x1, float x2, float z1, float z2 ) {
			return MakePart( 0, 16, 4, 6, 4, 4, 4, 6, x1, x2, 0f, 6/16f, z1, z2, false );
		}
		
		public override float NameYOffset {
			get { return 1.7f; }
		}
		
		public override float GetEyeY( Player player ) {
			return 22/16f;
		}
		
		public override Vector3 CollisionSize {
			get { return new Vector3( 8/16f, 26/16f, 8/16f ); }
		}
		
		public override BoundingBox PickingBounds {
			get { return new BoundingBox( -4/16f, 0, -6/16f, 4/16f, 26/16f, 6/16f ); }
		}
		
		protected override void DrawPlayerModel( Player p ) {
			graphics.Texturing = true;
			int texId = p.MobTextureId <= 0 ? cache.CreeperTexId : p.MobTextureId;
			graphics.BindTexture( texId );
			
			DrawRotate( 0, 18/16f, 0, -p.PitchRadians, 0, 0, Head );
			DrawPart( Torso );
			DrawRotate( 0, 6/16f, -2/16f, p.leftLegXRot, 0, 0, LeftLegFront );
			DrawRotate( 0, 6/16f, -2/16f, p.rightLegXRot, 0, 0, RightLegFront );
			DrawRotate( 0, 6/16f, 2/16f, p.rightLegXRot, 0, 0, LeftLegBack );
			DrawRotate( 0, 6/16f, 2/16f, p.leftLegXRot, 0, 0, RightLegBack );
			graphics.AlphaTest = true;
		}
		
		ModelPart Head, Torso, LeftLegFront, RightLegFront, LeftLegBack, RightLegBack;
	}
}