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#include <iostream>

#include <Util/Timer.h>

#include <Util/ArgExtracter.h>

#include <CGLA/Mat4x4d.h>

#include <Geometry/RGrid.h>

#include <Geometry/HGrid.h>

#include <Geometry/save_raw.h>

#include <Geometry/GridAlgorithm.h>

#include <Geometry/build_bbtree.h>

#include <Geometry/AABox.h>

#include <HMesh/triangulate.h>

#include <HMesh/Manifold.h>

#include <HMesh/load.h>

#include <HMesh/x3d_load.h>

#include <HMesh/x3d_save.h>

using namespace std;

using namespace HMesh;

using namespace Geometry;

using namespace CGLA;

using namespace Util;

namespace

{

	Vec3i vol_dim(64);

		const Mat4x4d fit_bounding_volume(const Vec3d& p0,

																		const Vec3d& p7,

																		float buf_reg) 

	{

		Vec3d sz = p7 - p0;

		Vec3i dims = vol_dim;

		Vec3d scal_vec = (Vec3d(dims)-Vec3d(2*buf_reg+2))/sz;

		float scal = min(scal_vec[0], min(scal_vec[1],scal_vec[2]));

		Mat4x4d m = translation_Mat4x4d(Vec3d(0)+Vec3d(buf_reg+1));

		m *= scaling_Mat4x4d(Vec3d(scal));

		m *= translation_Mat4x4d(-p0);

		return m;

	}

	bool do_ray_tests = false;

	bool do_obb = true;

	bool do_aabb = false;

	bool flip_normals = false;

}

template<class BBTree>

class DistCompCache

{

	BBTree *T;

	float old_d;

	Vec3i old_p;

public:

	DistCompCache(BBTree* _T): T(_T), old_p(-99999) {}

	void operator()(const CGLA::Vec3i& pi, float& vox_val)

	{

		Vec3f p(pi);

 		if(sqr_length(pi-old_p)==1)

 				vox_val = T->compute_signed_distance(p,CGLA::sqr(1.001+fabs(old_d)));

 		else

			vox_val = T->compute_signed_distance(p);

		if(flip_normals) vox_val = -vox_val;

		old_p = pi;

		old_d = vox_val;		

	}

};

template<class BBTree>

class DistComp

{

	BBTree *T;

public:

	DistComp(BBTree* _T): T(_T) {}

	void operator()(const CGLA::Vec3i& pi, float& vox_val)

	{

		Vec3d p(pi);

		vox_val =  T->compute_signed_distance(p);

		if(flip_normals) vox_val = -vox_val;

	}

};

template<class BBTree>

class RayCast

{

	BBTree *T;

public:

	RayCast(BBTree* _T): T(_T) {}

	void operator()(const CGLA::Vec3i& pi, float& vox_val)

	{

		int n = T->intersect_cnt(Vec3f(pi), Vec3f(1,0,0));

		if(n%2==0)

			vox_val=1000;

		else

			vox_val=-1000;

	}

};

typedef RGrid<float> RGridf;

int main(int argc, char** argv)

{	

	// LOAD OBJ

    Manifold m;

    if(argc>1)

	{

		ArgExtracter ae(argc, argv);

		do_aabb = ae.extract("-A");

		do_obb = ae.extract("-O");

		ae.extract("-x", vol_dim[0]);

		ae.extract("-y", vol_dim[1]);

		ae.extract("-z", vol_dim[2]);

		do_ray_tests = ae.extract("-R");

		flip_normals = ae.extract("-f");

		string file = ae.get_last_arg();

        cout << "loading " << file << "... " << flush; 

		load(file, m);

        cout << " done" << endl;

	}

    else

	{

		string fn("../../data/bunny-little.x3d");

		x3d_load(fn, m);

	}

	cout << "Volume dimensions " << vol_dim << endl;

	if(!valid(m))

	{

		cout << "Not a valid manifold" << endl;

		exit(0);

	}

	triangulate_by_edge_face_split(m);

	Vec3d p0, p7;

	bbox(m, p0, p7);

	Mat4x4d T = fit_bounding_volume(p0,p7,10);

    cout << "Transformation " << T << endl;

	for(VertexIDIterator v = m.vertices_begin(); v != m.vertices_end(); ++v)

		m.pos(*v) = T.mul_3D_point(m.pos(*v));

 	RGridf grid(vol_dim,FLT_MAX);

	Util::Timer tim;

	float T_build_obb=0, T_build_aabb=0, T_dist_obb=0, 

		T_dist_aabb=0, T_ray_obb=0, T_ray_aabb=0;

	if(do_obb)

	{

		cout << "Building OBB Tree" << endl;

		tim.start();

		OBBTree obb_tree;

		build_OBBTree(m, obb_tree);

		T_build_obb = tim.get_secs();

		cout << "Computing distances from OBB Tree" << endl;

		tim.start();

		DistCompCache<OBBTree> dist(&obb_tree);

		for_each_voxel(grid, dist);

		T_dist_obb = tim.get_secs();

		cout << "Saving distance field" << endl;

		save_raw_float("obb_dist.raw", grid);

		if(do_ray_tests)

		{

			cout << "Ray tests on OBB Tree" << endl;

			tim.start();

			RayCast<OBBTree> ray(&obb_tree);

			for_each_voxel(grid, ray);

			T_ray_obb = tim.get_secs();

			cout << "Saving ray volume" << endl;

			save_raw_float("obb_ray.raw", grid);

		}

	}

	if(do_aabb)

	{

		cout << "Building AABB Tree" << endl;

		tim.start();

		AABBTree aabb_tree;

		build_AABBTree(m, aabb_tree);

		T_build_aabb = tim.get_secs();

		cout << "Computing distances from AABB Tree" << endl;

		tim.start();

		DistCompCache<AABBTree> dist(&aabb_tree);

		for_each_voxel(grid, dist);

		T_dist_aabb = tim.get_secs();

		cout << "Saving distance field" << endl;

		save_raw_float("aabb_dist.raw", grid);

		if(do_ray_tests)

		{

			cout << "Ray tests on AABB tree" << endl;

			tim.start();

			RayCast<AABBTree> ray(&aabb_tree);

			for_each_voxel(grid, ray);

			T_ray_aabb = tim.get_secs();

			cout << "Saving ray volume" << endl;

			save_raw_float("aabb_ray.raw", grid);

		}

	}

	cout.width(10);

	cout << "Poly";

	cout.width(11);

	cout <<"build_obb";

	cout.width(12);

	cout << "build_aabb";

	cout.width(10);

	cout << "dist_obb" ;

	cout.width(10);

	cout << "dist_aabb";

	cout.width(10);

	cout << "ray_obb" ;

	cout.width(10);

	cout << "ray_aabb";

	cout << endl;

	cout.precision(4);

	cout.width(10);

	cout << m.no_faces() << " ";

	cout.width(10);

	cout << T_build_obb;

	cout.width(12);

	cout << T_build_aabb;

	cout.width(10);

	cout << T_dist_obb;

	cout.width(10);

	cout << T_dist_aabb;

	cout.width(10);

	cout << T_ray_obb;

	cout.width(10);

	cout << T_ray_aabb;

	cout << endl;

}

// Brute force code - never use ...

//  	cout << "Computing distances" << endl;

// 	for(int i=0;i<triangle_vec_global.size(); ++i)

// 		{

// 			k=0;

// 			TRI = triangle_vec_global[i];

// 			for_each_voxel(grid, dist_brute);

// 		}