/*************************************************************************/
/*  material_editor_plugin.cpp                                           */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
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/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
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/* "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 */
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/* The above copyright notice and this permission notice shall be        */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/*************************************************************************/

// FIXME: Disabled as (according to reduz) users were complaining that it gets in the way
// Waiting for PropertyEditor rewrite (planned for 3.1) to be refactored.

#include "material_editor_plugin.h"

#if 0

#include "scene/main/viewport.h"

void MaterialEditor::_gui_input(InputEvent p_event) {


}

void MaterialEditor::_notification(int p_what) {

	if (p_what==NOTIFICATION_FIXED_PROCESS) {

	}


	if (p_what==NOTIFICATION_READY) {

		//get_scene()->connect("node_removed",this,"_node_removed");

		if (first_enter) {
			//it's in propertyeditor so.. could be moved around

			light_1_switch->set_normal_texture(get_icon("MaterialPreviewLight1","EditorIcons"));
			light_1_switch->set_pressed_texture(get_icon("MaterialPreviewLight1Off","EditorIcons"));
			light_2_switch->set_normal_texture(get_icon("MaterialPreviewLight2","EditorIcons"));
			light_2_switch->set_pressed_texture(get_icon("MaterialPreviewLight2Off","EditorIcons"));

			sphere_switch->set_normal_texture(get_icon("MaterialPreviewSphereOff","EditorIcons"));
			sphere_switch->set_pressed_texture(get_icon("MaterialPreviewSphere","EditorIcons"));
			box_switch->set_normal_texture(get_icon("MaterialPreviewCubeOff","EditorIcons"));
			box_switch->set_pressed_texture(get_icon("MaterialPreviewCube","EditorIcons"));

			first_enter=false;
		}

	}

	if (p_what==NOTIFICATION_DRAW) {


		Ref<Texture> checkerboard = get_icon("Checkerboard","EditorIcons");
		Size2 size = get_size();

		draw_texture_rect(checkerboard,Rect2(Point2(),size),true);

	}
}



void MaterialEditor::edit(Ref<Material> p_material) {

	material=p_material;

	if (!material.is_null()) {
		sphere_mesh->surface_set_material(0,material);
		box_mesh->surface_set_material(0,material);
	} else {

		hide();
	}

}


void MaterialEditor::_button_pressed(Node* p_button) {

	if (p_button==light_1_switch) {
		light1->set_enabled(!light_1_switch->is_pressed());
	}

	if (p_button==light_2_switch) {
		light2->set_enabled(!light_2_switch->is_pressed());
	}

	if (p_button==box_switch) {
		box_instance->show();
		sphere_instance->hide();
		box_switch->set_pressed(true);
		sphere_switch->set_pressed(false);
	}

	if (p_button==sphere_switch) {
		box_instance->hide();
		sphere_instance->show();
		box_switch->set_pressed(false);
		sphere_switch->set_pressed(true);
	}

}

void MaterialEditor::_bind_methods() {

	ClassDB::bind_method(D_METHOD("_gui_input"),&MaterialEditor::_gui_input);
	ClassDB::bind_method(D_METHOD("_button_pressed"),&MaterialEditor::_button_pressed);

}

MaterialEditor::MaterialEditor() {

	viewport = memnew( Viewport );
	Ref<World> world;
	world.instance();
	viewport->set_world(world); //use own world
	add_child(viewport);
	viewport->set_disable_input(true);

	camera = memnew( Camera );
	camera->set_transform(Transform(Matrix3(),Vector3(0,0,3)));
	camera->set_perspective(45,0.1,10);
	viewport->add_child(camera);

	light1 = memnew( DirectionalLight );
	light1->set_transform(Transform().looking_at(Vector3(-1,-1,-1),Vector3(0,1,0)));
	viewport->add_child(light1);

	light2 = memnew( DirectionalLight );
	light2->set_transform(Transform().looking_at(Vector3(0,1,0),Vector3(0,0,1)));
	light2->set_color(Light::COLOR_DIFFUSE,Color(0.7,0.7,0.7));
	light2->set_color(Light::COLOR_SPECULAR,Color(0.7,0.7,0.7));
	viewport->add_child(light2);

	sphere_instance = memnew( MeshInstance );
	viewport->add_child(sphere_instance);

	box_instance = memnew( MeshInstance );
	viewport->add_child(box_instance);

	Transform box_xform;
	box_xform.basis.rotate(Vector3(1,0,0),Math::deg2rad(25));
	box_xform.basis = box_xform.basis * Matrix3().rotated(Vector3(0,1,0),Math::deg2rad(25));
	box_xform.basis.scale(Vector3(0.8,0.8,0.8));
	box_instance->set_transform(box_xform);

	{

		sphere_mesh.instance();


		int lats=32;
		int lons=32;
		float radius=1.0;

		PoolVector<Vector3> vertices;
		PoolVector<Vector3> normals;
		PoolVector<Vector2> uvs;
		PoolVector<float> tangents;
		Matrix3 tt = Matrix3(Vector3(0,1,0),Math_PI*0.5);

		for(int i = 1; i <= lats; i++) {
			double lat0 = Math_PI * (-0.5 + (double) (i - 1) / lats);
			double z0  = Math::sin(lat0);
			double zr0 =  Math::cos(lat0);

			double lat1 = Math_PI * (-0.5 + (double) i / lats);
			double z1 = Math::sin(lat1);
			double zr1 = Math::cos(lat1);

			for(int j = lons; j >= 1; j--) {

				double lng0 = 2 * Math_PI * (double) (j - 1) / lons;
				double x0 = Math::cos(lng0);
				double y0 = Math::sin(lng0);

				double lng1 = 2 * Math_PI * (double) (j) / lons;
				double x1 = Math::cos(lng1);
				double y1 = Math::sin(lng1);


				Vector3 v[4]={
					Vector3(x1 * zr0, z0, y1 *zr0),
					Vector3(x1 * zr1, z1, y1 *zr1),
					Vector3(x0 * zr1, z1, y0 *zr1),
					Vector3(x0 * zr0, z0, y0 *zr0)
				};

#define ADD_POINT(m_idx)                                                                       \
	normals.push_back(v[m_idx]);                                                               \
	vertices.push_back(v[m_idx] * radius);                                                     \
	{                                                                                          \
		Vector2 uv(Math::atan2(v[m_idx].x, v[m_idx].z), Math::atan2(-v[m_idx].y, v[m_idx].z)); \
		uv /= Math_PI;                                                                         \
		uv *= 4.0;                                                                             \
		uv = uv * 0.5 + Vector2(0.5, 0.5);                                                     \
		uvs.push_back(uv);                                                                     \
	}                                                                                          \
	{                                                                                          \
		Vector3 t = tt.xform(v[m_idx]);                                                        \
		tangents.push_back(t.x);                                                               \
		tangents.push_back(t.y);                                                               \
		tangents.push_back(t.z);                                                               \
		tangents.push_back(1.0);                                                               \
	}



				ADD_POINT(0);
				ADD_POINT(1);
				ADD_POINT(2);

				ADD_POINT(2);
				ADD_POINT(3);
				ADD_POINT(0);
			}
		}

		Array arr;
		arr.resize(VS::ARRAY_MAX);
		arr[VS::ARRAY_VERTEX]=vertices;
		arr[VS::ARRAY_NORMAL]=normals;
		arr[VS::ARRAY_TANGENT]=tangents;
		arr[VS::ARRAY_TEX_UV]=uvs;

		sphere_mesh->add_surface(Mesh::PRIMITIVE_TRIANGLES,arr);

		sphere_instance->set_mesh(sphere_mesh);

	}
	{


		box_mesh.instance();

		PoolVector<Vector3> vertices;
		PoolVector<Vector3> normals;
		PoolVector<float> tangents;
		PoolVector<Vector3> uvs;

		int vtx_idx=0;
#define ADD_VTX(m_idx)                                                             \
	;                                                                              \
	vertices.push_back(face_points[m_idx]);                                        \
	normals.push_back(normal_points[m_idx]);                                       \
	tangents.push_back(normal_points[m_idx][1]);                                   \
	tangents.push_back(normal_points[m_idx][2]);                                   \
	tangents.push_back(normal_points[m_idx][0]);                                   \
	tangents.push_back(1.0);                                                       \
	uvs.push_back(Vector3(uv_points[m_idx * 2 + 0], uv_points[m_idx * 2 + 1], 0)); \
	vtx_idx++;\

		for (int i=0;i<6;i++) {


			Vector3 face_points[4];
			Vector3 normal_points[4];
			float uv_points[8]={0,0,0,1,1,1,1,0};

			for (int j=0;j<4;j++) {

				float v[3];
				v[0]=1.0;
				v[1]=1-2*((j>>1)&1);
				v[2]=v[1]*(1-2*(j&1));

				for (int k=0;k<3;k++) {

					if (i<3)
						face_points[j][(i+k)%3]=v[k]*(i>=3?-1:1);
					else
						face_points[3-j][(i+k)%3]=v[k]*(i>=3?-1:1);
				}
				normal_points[j]=Vector3();
				normal_points[j][i%3]=(i>=3?-1:1);
			}

		//tri 1
			ADD_VTX(0);
			ADD_VTX(1);
			ADD_VTX(2);
		//tri 2
			ADD_VTX(2);
			ADD_VTX(3);
			ADD_VTX(0);

		}



		Array d;
		d.resize(VS::ARRAY_MAX);
		d[VisualServer::ARRAY_NORMAL]= normals ;
		d[VisualServer::ARRAY_TANGENT]= tangents ;
		d[VisualServer::ARRAY_TEX_UV]= uvs ;
		d[VisualServer::ARRAY_VERTEX]= vertices ;

		PoolVector<int> indices;
		indices.resize(vertices.size());
		for(int i=0;i<vertices.size();i++)
			indices.set(i,i);
		d[VisualServer::ARRAY_INDEX]=indices;

		box_mesh->add_surface(Mesh::PRIMITIVE_TRIANGLES,d);
		box_instance->set_mesh(box_mesh);
		box_instance->hide();



	}

	set_custom_minimum_size(Size2(1,150)*EDSCALE);

	HBoxContainer *hb = memnew( HBoxContainer );
	add_child(hb);
	hb->set_area_as_parent_rect(2);

	VBoxContainer *vb_shape = memnew( VBoxContainer );
	hb->add_child(vb_shape);

	sphere_switch = memnew( TextureButton );
	sphere_switch->set_toggle_mode(true);
	sphere_switch->set_pressed(true);
	vb_shape->add_child(sphere_switch);
	sphere_switch->connect("pressed",this,"_button_pressed",varray(sphere_switch));

	box_switch = memnew( TextureButton );
	box_switch->set_toggle_mode(true);
	box_switch->set_pressed(false);
	vb_shape->add_child(box_switch);
	box_switch->connect("pressed",this,"_button_pressed",varray(box_switch));

	hb->add_spacer();

	VBoxContainer *vb_light = memnew( VBoxContainer );
	hb->add_child(vb_light);

	light_1_switch = memnew( TextureButton );
	light_1_switch->set_toggle_mode(true);
	vb_light->add_child(light_1_switch);
	light_1_switch->connect("pressed",this,"_button_pressed",varray(light_1_switch));

	light_2_switch = memnew( TextureButton );
	light_2_switch->set_toggle_mode(true);
	vb_light->add_child(light_2_switch);
	light_2_switch->connect("pressed",this,"_button_pressed",varray(light_2_switch));

	first_enter=true;

}


void MaterialEditorPlugin::edit(Object *p_object) {

	Material * s = Object::cast_to<Material>(p_object);
	if (!s)
		return;

	material_editor->edit(Ref<Material>(s));
}

bool MaterialEditorPlugin::handles(Object *p_object) const {

	return p_object->is_type("Material");
}

void MaterialEditorPlugin::make_visible(bool p_visible) {

	if (p_visible) {
		material_editor->show();
		//material_editor->set_process(true);
	} else {

		material_editor->hide();
		//material_editor->set_process(false);
	}

}

MaterialEditorPlugin::MaterialEditorPlugin(EditorNode *p_node) {

	editor=p_node;
	material_editor = memnew( MaterialEditor );
	add_control_to_container(CONTAINER_PROPERTY_EDITOR_BOTTOM,material_editor);
	material_editor->hide();



}


MaterialEditorPlugin::~MaterialEditorPlugin()
{
}

#endif

String SpatialMaterialConversionPlugin::converts_to() const {

	return "ShaderMaterial";
}
bool SpatialMaterialConversionPlugin::handles(const Ref<Resource> &p_resource) const {

	Ref<SpatialMaterial> mat = p_resource;
	return mat.is_valid();
}
Ref<Resource> SpatialMaterialConversionPlugin::convert(const Ref<Resource> &p_resource) {

	Ref<SpatialMaterial> mat = p_resource;
	ERR_FAIL_COND_V(!mat.is_valid(), Ref<Resource>());

	Ref<ShaderMaterial> smat;
	smat.instance();

	Ref<Shader> shader;
	shader.instance();

	String code = VS::get_singleton()->shader_get_code(mat->get_shader_rid());

	shader->set_code(code);

	smat->set_shader(shader);

	List<PropertyInfo> params;
	VS::get_singleton()->shader_get_param_list(mat->get_shader_rid(), &params);

	for (List<PropertyInfo>::Element *E = params.front(); E; E = E->next()) {
		Variant value = VS::get_singleton()->material_get_param(mat->get_rid(), E->get().name);
		smat->set_shader_param(E->get().name, value);
	}

	smat->set_render_priority(mat->get_render_priority());
	return smat;
}