using System;
using ClassicalSharp.GraphicsAPI;
using ClassicalSharp.Renderers;
using OpenTK;

namespace ClassicalSharp.Model {

	public class SheepModel : IModel {

		public bool Fur = true;
		
		public SheepModel( Game window ) : base( window ) {
			vertices = new VertexPos3fTex2fCol4b[partVertices * 6 * ( Fur ? 2 : 1 )];
			Head = MakeHead();
			Torso = MakeTorso();
			LeftLegFront = MakeLeg( -0.3125f, -0.0625f, -0.4375f, -0.1875f );
			RightLegFront = MakeLeg( 0.0625f, 0.3125f, -0.4375f, -0.1875f );
			LeftLegBack = MakeLeg( -0.3125f, -0.0625f, 0.3125f, 0.5625f );
			RightLegBack = MakeLeg( 0.0625f, 0.3125f, 0.3125f, 0.5625f );
			if( Fur ) {
				FurHead = MakeFurHead();
				FurTorso = MakeFurTorso();
				FurLeftLegFront = MakeFurLeg( -0.34375f, -0.03125f, -0.46875f, -0.15625f );
				FurRightLegFront = MakeFurLeg( 0.03125f, 0.34375f, -0.46875f, -0.15625f );
				FurLeftLegBack = MakeFurLeg( -0.34375f, -0.03125f, 0.28125f, 0.59375f );
				FurRightLegBack = MakeFurLeg( 0.03125f, 0.34375f, 0.28125f, 0.59375f );
			}
			
			if( cache.SheepTexId <= 0 )
				cache.SheepTexId = graphics.CreateTexture( "sheep.png" );
			if( cache.SheepFurTexId <= 0 )
				cache.SheepFurTexId = graphics.CreateTexture( "sheep_fur.png" );
		}
		
		ModelPart MakeHead() {
			return MakePart( 0, 0, 8, 6, 6, 8, 6, 6, -0.1875f, 0.1875f, 1f, 1.375f, -0.875f, -0.375f, false );
		}
		
		ModelPart MakeTorso() {
			return MakeRotatedPart( 28, 8, 6, 16, 8, 6, 8, 16, -0.25f, 0.25f, 0.75f, 1.125f, -0.5f, 0.5f, false );
		}
		
		ModelPart MakeFurHead() {
			return MakePart( 0, 0, 6, 6, 6, 6, 6, 6, -0.21875f, 0.21875f, 0.96875f, 1.40625f, -0.78125f, -0.34375f, false );
		}
		
		ModelPart MakeFurTorso() {
			return MakeRotatedPart( 28, 8, 6, 16, 8, 6, 8, 16, -0.375f, 0.375f, 0.65625f, 1.21875f, -0.625f, 0.625f, false );
		}
		
		ModelPart MakeLeg( float x1, float x2, float z1, float z2 ) {
			return MakePart( 0, 16, 4, 12, 4, 4, 4, 12, x1, x2, 0f, 0.75f, z1, z2, false );
		}
		
		ModelPart MakeFurLeg( float x1, float x2, float z1, float z2 ) {
			return MakePart( 0, 16, 4, 6, 4, 4, 4, 6, x1, x2, 0.34375f, 0.78125f, z1, z2, false );
		}
		
		public override float NameYOffset {
			get { return Fur ? 1.48125f: 1.075f; }
		}
		
		public override Vector3 CollisionSize {
			get { return new Vector3( 14 / 16f, 20 / 16f, 14 / 16f ); }
		}
		
		public override BoundingBox PickingBounds {
			get { return new BoundingBox( -6 / 16f, 0, -13 / 16f, 6 / 16f, 23 / 16f, 10 / 16f ); }
		}
		
		protected override void DrawPlayerModel( Player p ) {
			graphics.Texturing = true;
			int texId = p.MobTextureId <= 0 ? cache.SheepTexId : p.MobTextureId;
			graphics.BindTexture( texId );
			
			DrawRotate( 0, 1.125f, -0.5f, -p.PitchRadians, 0, 0, Head );
			DrawPart( Torso );
			DrawRotate( 0, 0.75f, -0.3125f, p.leftLegXRot, 0, 0, LeftLegFront );
			DrawRotate( 0, 0.75f, -0.3125f, p.rightLegXRot, 0, 0, RightLegFront );
			DrawRotate( 0, 0.75f, 0.4375f, p.rightLegXRot, 0, 0, LeftLegBack );
			DrawRotate( 0, 0.75f, 0.4375f, p.leftLegXRot, 0, 0, RightLegBack );
			// Need to draw the two parts separately.
			graphics.DrawDynamicIndexedVb( DrawMode.Triangles, cache.vb, cache.vertices, index, index * 6 / 4 );
			graphics.AlphaTest = true;
			index = 0;
			
			if( Fur ) {
				graphics.BindTexture( cache.SheepFurTexId );
				DrawPart( FurTorso );
				DrawRotate( 0, 1.125f, -0.5f, -p.PitchRadians, 0, 0, FurHead );
				DrawRotate( 0, 0.75f, -0.3125f, p.leftLegXRot, 0, 0, FurLeftLegFront );
				DrawRotate( 0, 0.75f, -0.3125f, p.rightLegXRot, 0, 0, FurRightLegFront );
				DrawRotate( 0, 0.75f, 0.4375f, p.rightLegXRot, 0, 0, FurLeftLegBack );
				DrawRotate( 0, 0.75f, 0.4375f, p.leftLegXRot, 0, 0, FurRightLegBack );
			}
		}
		
		ModelPart Head, Torso, LeftLegFront, RightLegFront, LeftLegBack, RightLegBack;
		ModelPart FurHead, FurTorso, FurLeftLegFront, FurRightLegFront, FurLeftLegBack, FurRightLegBack;
	}
}