/*************************************************************************/
/*  test_render.cpp                                                      */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/
#include "test_render.h"

#include "servers/visual_server.h"
#include "os/main_loop.h"
#include "math_funcs.h"
#include "print_string.h"
#include "os/os.h"
#include "quick_hull.h"
#include "os/keyboard.h"

#define OBJECT_COUNT 50

namespace TestRender {


class TestMainLoop : public MainLoop {


	RID test_cube;
	RID instance;
	RID camera;
	RID viewport;
	RID light;
	RID scenario;

	struct InstanceInfo {

		RID instance;
		Transform base;
		Vector3 rot_axis;
	};

	List<InstanceInfo> instances;

	float ofs;
	bool quit;
protected:


public:
	virtual void input_event(const InputEvent& p_event) {

		if (p_event.type==InputEvent::KEY && p_event.key.pressed)
			quit=true;
	}

	virtual void init() {


		print_line("INITIALIZING TEST RENDER");
		VisualServer *vs=VisualServer::get_singleton();
		test_cube = vs->get_test_cube();
		scenario = vs->scenario_create();






		Vector<Vector3> vts;

/*
		PoolVector<Plane> sp = Geometry::build_sphere_planes(2,5,5);
		Geometry::MeshData md2 = Geometry::build_convex_mesh(sp);
		vts=md2.vertices;
*/
/*

		static const int s = 20;
		for(int i=0;i<s;i++) {
			Basis rot(Vector3(0,1,0),i*Math_PI/s);

			for(int j=0;j<s;j++) {
				Vector3 v;
				v.x=Math::sin(j*Math_PI*2/s);
				v.y=Math::cos(j*Math_PI*2/s);

				vts.push_back( rot.xform(v*2 ) );
			}
		}*/
		/*for(int i=0;i<100;i++) {

			vts.push_back( Vector3(Math::randf()*2-1.0,Math::randf()*2-1.0,Math::randf()*2-1.0).normalized()*2);
		}*/
		/*
		vts.push_back(Vector3(0,0,1));
		vts.push_back(Vector3(0,0,-1));
		vts.push_back(Vector3(0,1,0));
		vts.push_back(Vector3(0,-1,0));
		vts.push_back(Vector3(1,0,0));
		vts.push_back(Vector3(-1,0,0));*/

		vts.push_back(Vector3(1,1,1));
		vts.push_back(Vector3(1,-1,1));
		vts.push_back(Vector3(-1,1,1));
		vts.push_back(Vector3(-1,-1,1));
		vts.push_back(Vector3(1,1,-1));
		vts.push_back(Vector3(1,-1,-1));
		vts.push_back(Vector3(-1,1,-1));
		vts.push_back(Vector3(-1,-1,-1));

		Geometry::MeshData md;
		Error err = QuickHull::build(vts,md);
		print_line("ERR: "+itos(err));
		test_cube = vs->mesh_create();
		vs->mesh_add_surface_from_mesh_data(test_cube,md);
		//vs->scenario_set_debug(scenario,VS::SCENARIO_DEBUG_WIREFRAME);

		/*
		RID sm = vs->shader_create();
		//vs->shader_set_fragment_code(sm,"OUT_ALPHA=mod(TIME,1);");
		//vs->shader_set_vertex_code(sm,"OUT_VERTEX=IN_VERTEX*mod(TIME,1);");
		vs->shader_set_fragment_code(sm,"OUT_DIFFUSE=vec3(1,0,1);OUT_GLOW=abs(sin(TIME));");
		RID tcmat = vs->mesh_surface_get_material(test_cube,0);
		vs->material_set_shader(tcmat,sm);
		*/


		List<String> cmdline = OS::get_singleton()->get_cmdline_args();
		int object_count = OBJECT_COUNT;
		if (cmdline.size() > 0 && cmdline[cmdline.size()-1].to_int()) {
			object_count = cmdline[cmdline.size()-1].to_int();
		};

		for (int i=0;i<object_count;i++) {

			InstanceInfo ii;


			ii.instance = vs->instance_create2( test_cube, scenario );


			ii.base.translate( Math::random(-20,20), Math::random(-20,20),Math::random(-20,18) );
			ii.base.rotate( Vector3(0,1,0), Math::randf() * Math_PI );
			ii.base.rotate( Vector3(1,0,0), Math::randf() * Math_PI );
			vs->instance_set_transform( ii.instance, ii.base );

			ii.rot_axis = Vector3( Math::random(-1,1), Math::random(-1,1), Math::random(-1,1) ).normalized();

			instances.push_back(ii);

		}

		camera = vs->camera_create();

// 		vs->camera_set_perspective( camera, 60.0,0.1, 100.0 );

		viewport = vs->viewport_create();
		Size2i screen_size = OS::get_singleton()->get_window_size();
		vs->viewport_set_size(viewport,screen_size.x,screen_size.y);
		vs->viewport_attach_to_screen(viewport,Rect2(Vector2(),screen_size));
		vs->viewport_set_active(viewport,true);
		vs->viewport_attach_camera( viewport, camera );
		vs->viewport_set_scenario( viewport, scenario );
		vs->camera_set_transform(camera, Transform( Basis(), Vector3(0,3,30 ) ) );
		vs->camera_set_perspective( camera, 60, 0.1, 1000);


		/*
		RID lightaux = vs->light_create( VisualServer::LIGHT_OMNI );
		vs->light_set_var( lightaux, VisualServer::LIGHT_VAR_RADIUS, 80 );
		vs->light_set_var( lightaux, VisualServer::LIGHT_VAR_ATTENUATION, 1 );
		vs->light_set_var( lightaux, VisualServer::LIGHT_VAR_ENERGY, 1.5 );
		light = vs->instance_create( lightaux );
		*/
		RID lightaux;

		lightaux = vs->light_create( VisualServer::LIGHT_DIRECTIONAL );
		//vs->light_set_color( lightaux, VisualServer::LIGHT_COLOR_AMBIENT, Color(0.0,0.0,0.0) );
		vs->light_set_color( lightaux,  Color(1.0,1.0,1.0) );
		//vs->light_set_shadow( lightaux, true );
		light = vs->instance_create2( lightaux, scenario );
		Transform lla;
		//lla.set_look_at(Vector3(),Vector3(1,-1,1),Vector3(0,1,0));
		lla.set_look_at(Vector3(),Vector3(-0.000000,-0.836026,-0.548690),Vector3(0,1,0));

		vs->instance_set_transform( light, lla );

		lightaux = vs->light_create( VisualServer::LIGHT_OMNI );
		//vs->light_set_color( lightaux, VisualServer::LIGHT_COLOR_AMBIENT, Color(0.0,0.0,1.0) );
		vs->light_set_color( lightaux,  Color(1.0,1.0,0.0) );
		vs->light_set_param( lightaux, VisualServer::LIGHT_PARAM_RANGE, 4 );
		vs->light_set_param( lightaux, VisualServer::LIGHT_PARAM_ENERGY, 8 );
		//vs->light_set_shadow( lightaux, true );
		//light = vs->instance_create( lightaux );

		ofs=0;
		quit=false;
	}
	virtual bool iteration(float p_time) {

		VisualServer *vs=VisualServer::get_singleton();
		//Transform t;
		//t.rotate(Vector3(0, 1, 0), ofs);
		//t.translate(Vector3(0,0,20 ));
		//vs->camera_set_transform(camera, t);

		ofs+=p_time*0.05;

		//return quit;

		for(List<InstanceInfo>::Element *E=instances.front();E;E=E->next()) {

			Transform pre( Basis(E->get().rot_axis, ofs), Vector3() );
			vs->instance_set_transform( E->get().instance, pre * E->get().base );
			/*
			if( !E->next() ) {

				vs->free( E->get().instance );
				instances.erase(E );
			}*/
		}

		return quit;
	}

	virtual bool idle(float p_time) {
		return quit;
	}


	virtual void finish() {

	}

};


MainLoop* test() {

	return memnew( TestMainLoop );

}

}