#include "brush.h"
#include "physics.h"
#include "rendering.h"
#include "tier0/platform.h"
#include "tier1/utlbuffer.h"
#include "tier1/utlvector.h"

void CBrushEntity::Precache()
{

}

void CBrushEntity::Spawn()
{
	CUtlBuffer<uint32_t> indicies(m_mesh.GetSize()*3);
	for (uint32_t i = 0;i<indicies.GetSize();i++)
	{
		indicies[i]=i;
	}
	CUtlBuffer<Point<float>> triangles(m_mesh.GetSize()*3);
	uint32_t i = 0;
	for (auto tri: m_mesh)
	{
		V_memcpy(&triangles[i],tri.location,36);
		i+=1;
	}
	V_printf("indicides %i\n",indicies.GetSize());
	V_printf("vertices %i\n",triangles.GetSize());

	px_collider_params params = {};
	params.friction = 0;
	m_collider = px_trimesh((Point<float>*)triangles.GetMemory(), triangles.GetSize(), (uint32_t(*)[3])indicies.GetMemory(), indicies.GetSize()/3 ,params);
	px_matrix mat = {};
	mat.m[0] = 1;
	mat.m[4] = 1;
	mat.m[9] = 1;
	mat.m[15] = 1;
	px_rigidbody_params param = {};
	param.gravity_scale = 1;
	m_body = px_staticbody(px, m_collider, mat);
};

void CBrushEntity::Destroy()
{

}
void CBrushEntity::Think( float fDelta )
{
};


void C_BrushEntity::Precache()
{
	CBrushEntity* pBrushEntity = dynamic_cast<CBrushEntity*>(pEntity);
	if (!pBrushEntity)
		Plat_FatalErrorFunc("pEntity is not a CBrushEntity");
}

void C_BrushEntity::Spawn()
{
	struct Vertex_t
	{
		float position[3];
		float uv[2];
	};

	pAlbedo = ITextureManager::LoadTexture("gfx/bricks.png");
	CBrushEntity* pBrushEntity = (CBrushEntity*)pEntity;
	uint32_t numVertices = 15*pBrushEntity->m_mesh.GetSize();
	vertexBuffer = IBrushRenderer::CreateVertexBuffer(numVertices*4);
	Vertex_t *pTriangles = (Vertex_t*)vertexBuffer->Map();
	uint32_t i = 0;
	for (auto &triangle: pBrushEntity->m_mesh)
	{
		pTriangles[i].position[0] = triangle.location[0];
		pTriangles[i].position[1] = triangle.location[1];
		pTriangles[i].position[2] = triangle.location[2];
		pTriangles[i].uv[0] = triangle.uv[0];
		pTriangles[i].uv[1] = triangle.uv[1];
		pTriangles[i+1].position[0] = triangle.location[3];
		pTriangles[i+1].position[1] = triangle.location[4];
		pTriangles[i+1].position[2] = triangle.location[5];
		pTriangles[i+1].uv[0] = triangle.uv[2];
		pTriangles[i+1].uv[1] = triangle.uv[3];
		pTriangles[i+2].position[0] = triangle.location[6];
		pTriangles[i+2].position[1] = triangle.location[7];
		pTriangles[i+2].position[2] = triangle.location[8];
		pTriangles[i+2].uv[0] = triangle.uv[4];
		pTriangles[i+2].uv[1] = triangle.uv[5];
		i+=3;
	}
	vertexBuffer->Unmap();

	mesh = IBrushRenderer::CreateMesh();
	mesh->SetVertexBuffer(vertexBuffer);

};

void C_BrushEntity::Destroy()
{

}
void C_BrushEntity::Think( float fDelta )
{
	material.m.albedo = ITextureManager::GetTexture(pAlbedo);
	IBrushRenderer::SetMaterial(&material);
	mesh->Draw();
};