using System;

using Delta.ContentSystem.Rendering;

using Delta.Engine;

using Delta.InputSystem;

using Delta.Rendering.Basics.Drawing;

using Delta.Rendering.Cameras;

using Delta.Rendering.Models;

using Delta.Utilities;

using Delta.Utilities.Datatypes;

using Delta.Utilities.Graphics;

using Delta.Utilities.Helpers;

using NUnit.Framework;



namespace Delta.Rendering.ModelTests

{

	internal class MeshTests

	{

		#region TestCreateBox

		/// <summary>

		/// Test the create box method of MeshData.

		/// </summary>

		[Test, Category("Visual")]

		public static void TestCreateBox()

		{

			LookAtCamera cam = new LookAtCamera(new Vector(22, 15, 15));

			GeometryData data = GeometryData.CreateBox(

				new VertexFormat(new[]

				{

					new VertexElement(VertexElementType.Position3D),

					new VertexElement(VertexElementType.Normal),

					new VertexElement(VertexElementType.Tangent),

				}), 10, 10, 10, false, Color.White);

			Color faceColor = Color.Red;

			Color normalColor = Color.Yellow;

			Color tangentColor = Color.Purple;

			bool showTangent = false;

			float angle = 0f;

			Application.Start(delegate

			{

				angle += Time.Delta * 20f;

				cam.Position = new Vector(25f * MathHelper.Cos(angle),

					20f * MathHelper.Sin(angle), cam.Position.Z);



				Grid.Draw();



				for (int i = 0; i < data.Indices.Length / 3; i++)

				{

					int startIndex = i * 3;

					Vector pos1 = data.GetPosition(

						data.Indices[startIndex]);

					Vector pos2 = data.GetPosition(

						data.Indices[startIndex + 1]);

					Vector pos3 = data.GetPosition(

						data.Indices[startIndex + 2]);



					Vector normal = new Vector(data.reader);

					Vector tangent = new Vector(data.reader);



					Line.Draw(pos1, pos2, faceColor);

					Line.Draw(pos2, pos3, faceColor);

					Line.Draw(pos3, pos1, faceColor);



					Vector center = (pos1 + pos2 + pos3) / 3f;



					if (showTangent)

					{

						Application.Window.Title = "Tangents";

						Line.Draw(center, center + tangent, tangentColor);

					}

					else

					{

						Application.Window.Title = "Normals";

						Line.Draw(center, center + normal, normalColor);

					}

				}



				if (Input.Mouse.LeftButtonReleased)

				{

					showTangent = !showTangent;

				}

			});

		}

		#endregion



		#region Start (EntryPoint from Main)

		/// <summary>

		/// Start

		/// </summary>

		[Test]

		public static void Start()

		{

			//DrawCreatePlane();

			//DrawCreateBox();

			//DrawCreateSphere();

			//DrawMesh();

			DrawAnimatedMesh();

			//SimpleAnimatedPlane();



			//ImportColladaTestBox();

			//DrawColladaTestBox();

			//DrawColladaBox2UVs();

			//DrawModel();

			//DrawMap();

			//DrawMayaModel();

			//Save();

			//TestModelWithTextureTiling();

			//DrawGoblin();

			//DrawAnimatedModel();

			//TestMultipleAnimations();

			//TestSmoothPlayAnimation();

			//TestFrameRate();

		}



		// Start()

		#endregion



		#region DrawCreatePlane

		/// <summary>

		/// Draw create plane

		/// </summary>

		[Test]

		public static void DrawCreatePlane()

		{

			// First we have define the material

			MaterialData materialData = new MaterialData

			{

				ShaderName = "TexturedShader3D",

				//unused: Ambient = Color.Yellow,

				//DiffuseMapName = "",

				//DiffuseMapName = "TestPlaneHighDiffuse",

				DiffuseMapName = "FountainHighDiffuse",

			};

			// And the model we wanna draw

			Mesh plane = Mesh.CreatePlane("ModelTests.DrawCreatePlane", 5, 5,

				materialData);



			// Initialize the camera which we wanna use in the scene

			LookAtCamera cam = new LookAtCamera(new Vector(10, 10, 10));

			Application.Start(delegate

			{

				plane.Draw();

			});

		}



		// DrawCreatePlane()

		#endregion



		#region DrawBox

		/// <summary>

		/// Draw create box

		/// </summary>

		[Test]

		public static void DrawBox()

		{

			Mesh box = Mesh.CreateBox("MeshTests.DrawBox", 5, 5, 5,

				MaterialData.Default);



			// Initialize the camera which we wanna use in the scene

			LookAtCamera cam = new LookAtCamera(new Vector(10, 10, 10));

			Application.Start(delegate

			{

				box.Draw();

			});

		}



		// DrawCreateBox()

		#endregion



		#region DrawColoredBox

		/// <summary>

		/// Draw colored box

		/// </summary>

		[Test]

		public static void DrawColoredBox()

		{

			// First we have define the material

			MaterialData materialData = new MaterialData

			{

				ShaderName = "TexturedColoredShader3D",

				Diffuse = Color.Yellow,

				DiffuseMapName = "",

			};

			// And the model we wanna draw

			Mesh box = Mesh.CreateBox("MeshTests.DrawColoredBox", 5, 5, 5,

				materialData);



			// Initialize the camera which we wanna use in the scene

			LookAtCamera cam = new LookAtCamera(new Vector(10, 10, 10));

			Application.Start(delegate

			{

				box.Draw();

			});

		}



		// DrawCreateBox()

		#endregion



		#region DrawCreateSphere

		/// <summary>

		/// Draw create sphere

		/// </summary>

		[Test]

		public static void DrawCreateSphere()

		{

			// First we have define the material

			MaterialData materialData = new MaterialData

			{

				ShaderName = "TexturedShader3D",

				Ambient = Color.Yellow,

				DiffuseMapName = "",

			};

			// And the model we wanna draw

			Mesh sphere = Mesh.CreateSphere("ModelTests.DrawCreateSphere", 0.1f,

				materialData);



			// Initialize the camera which we wanna use in the scene

			LookAtCamera cam = new LookAtCamera(new Vector(10, 10, 10));



			Application.Start(delegate

			{

				Grid.Draw();



				sphere.Draw();

			});

		}



		// DrawCreateSphere()

		#endregion



		#region DrawMesh

		/// <summary>

		/// Draw mesh

		/// </summary>

		[Test]

		public static void DrawMesh()

		{

			Mesh testMesh = new Mesh(

				//"Cock131"); // Strange name for Soulcraft level part test mesh!

				//"Twinchurch");

				//"TestPlane");

				//"Fountain");

				//"Statue");

				//"Colosseum");

				//"Bridge");

				//"BridgeFloor");

				//"BridgeEnd");

				//Note: Many models are messed up right now, but the level ones work!

				//"Bench");

				//"Column");

				//"LampB");

				//Note: This still has duplicate content bug!

				//"Skydome");

				//Note 2011-02-12: All three stopped working, but does not matter,

				// the animated ones work for the tech demo ...

				//"Abomination");

				//"Angel");

				//"Woman");

				"Firemage");

			LookAtCamera cam = new LookAtCamera(new Vector(10, 10, 10));

			// Test if we have loaded the normal correctly!

			//finally all works fine, last mipmaps were just missing (Marcels code)!

			//Material testMat = new Material(

			//now working, quadratic:

			//"AbominationHighNormal");

			//"AngelHighNormal");

			//now working, quadratic:

			//"WomanHighNormal");

			//not working, not quadratic:

			//"LampHighMediumLowNormal");

			//"InnerGroundBestHighMediumLowNormal");

			//"StatueHighMediumNormal");

			//not working, not quadratic:

			//"ObeliskHighMediumLowNormal");



			Application.Start(delegate

			{

				// Show the normal map in the top left corner.

				//testMat.Draw(new Rectangle(ScreenSpace.Area.Left, ScreenSpace.Area.Top,

				//	0.1f, 0.1f));

				//Font.Default.WriteTopLeft("Used shader: " + testMesh.Material);

				testMesh.Draw();

				//Grid.Draw();

				//Light.Draw();

				//disabled, not always available: Sky.Draw();

			});

		}



		// DrawMesh()

		#endregion



		#region DrawAnimatedMesh

		/// <summary>

		/// Draw animated mesh

		/// </summary>

		[Test]

		public static void DrawAnimatedMesh()

		{

			Mesh testMesh = new Mesh(

				//"Abomination");

				//"Angel");

				//"Woman");

				"Firemage");

			//"Demon");

			LookAtCamera cam = new LookAtCamera(new Vector(10, 10, 10));

			Application.Start(delegate

			{

				testMesh.Draw();

				Grid.Draw();

				//Light.Draw();

				//disabled, not always available: Sky.Draw();

			});

		}



		// DrawAnimatedMesh()

		#endregion



		#region SimpleAnimatedPlane

		/// <summary>

		/// Simple animated plane

		/// </summary>

		[Test]

		private static void SimpleAnimatedPlane()

		{

			MaterialData planeMaterial = new MaterialData

			{

				// Skinned shader

				ShaderName = "SkinnedTextured",

				// Default diffuse map

				DiffuseMapName = "",

			};

			// And the model we wanna draw

			Mesh planeMesh = Mesh.CreatePlane("<SimpleAnimatedPlane>", 2, 2,

				planeMaterial);



			GeometryData planeData = planeMesh.Geometry.Data;



			// Animate only the right plane side

			planeData.SetSkinData(0, new Point(0, 0), new Point(1.0f, 0.0f));

			planeData.SetSkinData(1, new Point(1.0f, 1.0f), new Point(0.5f, 0.5f));

			planeData.SetSkinData(2, new Point(0, 0), new Point(1.0f, 0.0f));

			planeData.SetSkinData(3, new Point(1.0f, 1.0f), new Point(0.5f, 0.5f));



			Animation testAnimation = new Animation(planeMesh, null) //TODO?

			{

				Duration = 1,

			};



			float frameCount = 30;

			float degreeIncrease = 90 / frameCount;

			float currentDegree = -45f;

			Matrix[][] frames = new Matrix[(int)frameCount][];

			for (int frame = 0; frame < frameCount; frame++)

			{

				// we want to inverse the direction of the animation after the half

				// of the frames so we get a cycle animation.

				if (frame == frameCount / 2)

				{

					degreeIncrease *= -1;

				}



				currentDegree += degreeIncrease;

				frames[frame] = new[]

				{

					// The left plane side has no animation part.

					Matrix.Identity,

					// Rotate the right plane side up and down.

					Matrix.CreateRotationY(currentDegree),

				};

			}



			testAnimation.Frames = frames;



			// Let's view the scene now

			LookAtCamera cam = new LookAtCamera(new Vector(1, -5, 5));

			Application.Start(delegate

			{

				Grid.Draw();

				testAnimation.Update();

				planeMesh.Draw();

			});

		}



		// SimpleAnimatedPlane()

		#endregion



		#region LoadContentMesh

		/// <summary>

		/// Load content mesh

		/// </summary>

		[Test]

		public static void LoadContentMesh()

		{

			string testMeshName = "Rocks";

			Mesh meshInstance1 = new Mesh(testMeshName);

			Assert.NotNull(meshInstance1.Geometry);

			Assert.NotNull(meshInstance1.Material);



			Mesh meshInstance2 = new Mesh(testMeshName);

			Assert.NotNull(meshInstance2.Geometry);

			Assert.NotNull(meshInstance2.Material);

		}

		#endregion



		#region DrawNoTexturedGeometry

		/// <summary>

		/// This test show the NoTexturing feature rendering with 3D geometry.

		/// </summary>

		[Test]

		public static void DrawNoTexturedGeometry()

		{

			BaseCamera cam = new LookAtCamera(new Vector(10, 10, 15));



			MaterialData materialData = new MaterialData

			{

				ShaderName = "LineShader3D"

			};



			Mesh mesh1 = Mesh.CreateCube("Mesh1", 3.0f, Color.Red, materialData);

			Mesh mesh2 = Mesh.CreateCube("Mesh2", 3.0f, Color.Green, materialData);

			Mesh mesh3 = Mesh.CreateCube("Mesh3", 3.0f, Color.Yellow, materialData);

			Mesh mesh4 = Mesh.CreateCube("Mesh4", 3.0f, Color.Blue, materialData);

			Mesh mesh5 = Mesh.CreateCube("Mesh5", 3.0f, Color.Teal, materialData);



			Matrix mesh2Matrix = Matrix.CreateTranslation(0, -5, 0);

			Matrix mesh3Matrix = Matrix.CreateTranslation(0, -10, 0);

			Matrix mesh4Matrix = Matrix.CreateTranslation(0, 5, 0);

			Matrix mesh5Matrix = Matrix.CreateTranslation(0, 10, 0);



			Application.Start(delegate

			{

				mesh1.Draw();

				mesh2.Draw(ref mesh2Matrix);

				mesh3.Draw(ref mesh3Matrix);

				mesh4.Draw(ref mesh4Matrix);

				mesh5.Draw(ref mesh5Matrix);

			});

		}

		#endregion



		#region CreateInnerBox

		/// <summary>

		/// Shows how to create inner box.

		/// </summary>

		[Test]

		public static void CreateInnerBox()

		{

			BaseCamera cam = new LookAtCamera(new Vector(10, 10, 15));



			MaterialData materialData = new MaterialData

			{

				DiffuseMapName = "DeltaEngineLogo",

				ShaderName = "TexturedShader3D"

			};



			MaterialData materialDataColored = new MaterialData

			{

				DiffuseMapName = "DeltaEngineLogo",

				ShaderName = "TexturedColoredShader3D"

			};



			Mesh mesh1 = Mesh.CreateInnerBox("Mesh1", 3.0f, 3.0f, 3.0f,

				materialData);



			Mesh mesh2 = Mesh.CreateInnerBox("Mesh2", 3.0f, 3.0f, 3.0f,

				Color.Green, materialDataColored);



			Matrix mesh2Matrix = Matrix.CreateTranslation(0, -5, 0);



			Application.Start(delegate

			{

				mesh1.Draw();

				mesh2.Draw(ref mesh2Matrix);

			});

		}

		#endregion



		#region CreateInnerSphere

		/// <summary>

		/// Shows how to create inner sphere.

		/// </summary>

		[Test]

		public static void CreateInnerSphere()

		{

			BaseCamera cam = new LookAtCamera(new Vector(10, 10, 15));



			MaterialData materialData = new MaterialData

			{

				DiffuseMapName = "DeltaEngineLogo",

				ShaderName = "TexturedShader3D"

			};



			MaterialData materialDataColored = new MaterialData

			{

				DiffuseMapName = "DeltaEngineLogo",

				ShaderName = "TexturedColoredShader3D"

			};



			Mesh mesh1 = Mesh.CreateInnerSphere("Mesh1", 3.0f,

				materialData);



			Mesh mesh2 = Mesh.CreateInnerSphere("Mesh2", 3.0f,

				Color.Green, materialDataColored);



			Matrix mesh2Matrix = Matrix.CreateTranslation(0, -10, 0);



			Application.Start(delegate

			{

				mesh1.Draw();

				mesh2.Draw(ref mesh2Matrix);

			});

		}

		#endregion



	}

}