/*
	以下命名空间定义了 TreeJs所支持的Json文件格式所对应的C++结构

	https://github.com/mrdoob/three.js/wiki/JSON-Model-format-3

	请注意上面的网址，里面说明了如何解析faces数组

	RvtVa3c 插件中导出的结构如下:

	{
		Type bitmask = 0 (TRIANGLE)
		例如：
		0,[vertex-0][vertex-1][vertex-2]
	}

*/
#pragma once

#include <set>
#include <vector>
#include <map>

// 初始化一个可索引类的构造函数，std::wstring uuid 为此类的索引成员
#define CONSTRUCT_3JS_CLASS(classname) \
classname(std::wstring &id): uuid(id) {}\
classname(){}

namespace ThreeJs
{
	/*	Type Bitmask

		0 bit:	0 = triangle (3 indices),	1 = quad (4 indices)
		1 bit:	0 = no face material,		1 = face material (1 index)
		2 bit:	0 = no face uvs,			1 = face uvs (1 index)
		3 bit:	0 = no face vertex uvs,		1 = face vertex uvs (3 indices or 4 indices)
		4 bit:	0 = no face normal,			1 = face normal (1 index)
		5 bit:	0 = no face vertex normals,	1 = face vertex normals (3 indices or 4 indices)
		6 bit:	0 = no face color,			1 = face color (1 index)
		7 bit:	0 = no face vertex colors,	1 = face vertex colors (3 indices or 4 indices)
	*/ 

	const unsigned QUAD					= 0x01;
	const unsigned FACE_MATERIAL		= 0x02;
	const unsigned FACE_UV				= 0x04;
	const unsigned FACE_VERTEX_UV		= 0x08;
	const unsigned FACE_NORMAL			= 0x10;
	const unsigned FACE_VERTEX_NORMAL	= 0x20;
	const unsigned FACE_COLOR			= 0x40;
	const unsigned FACE_VERTEX_COLOR	= 0x80;

	/*	DEMO: bitmask 为 11 11 11 11 时 一个 face 在 faces 内的表述
		// 255,
		// [vertex_index, vertex_index, vertex_index, vertex_index],
		// [material_index],
		// [face_uv],
		// [face_vertex_uv, face_vertex_uv, face_vertex_uv, face_vertex_uv],
		// [face_normal],
		// [face_vertex_normal, face_vertex_normal, face_vertex_normal, face_vertex_normal],
		// [face_color]
		// [face_vertex_color, face_vertex_color, face_vertex_color, face_vertex_color],
	*/

	const std::wstring THREEJS_GEOMETRIES(_T("geometries"));
	const std::wstring THREEJS_OBJECT(_T("object"));
	const std::wstring THREEJS_METADATA(_T("metadata"));
	const std::wstring THREEJS_MATERIALS(_T("materials"));

	typedef std::vector<double> MATRIX;
	typedef std::vector<int> FACES;

	template <typename T>
	struct compare_uuid
	{
		bool operator () (const T &a, const T &b) const
		{
			return a.uuid < b.uuid;
		}
	};

	// 一个geometyrs数组由多个Geometry结构组成
	/*
	"geometrys": [
		{
			"uuid": "",
			"type": "",
			"data": {
				"vertices": [],
				"normals": [],
				"edges": [],
				"uvs": [],
				"faces": [],
				"scale": 1.0,
				"visible": true,
				"castShadow": true,
				"receiveShadow": false,
				"doubleSided": true
			}
		},
	]
	*/
	struct Geometry
	{
		struct Data
		{
			std::vector<double> vertices, normals, uvs, edges;
			FACES faces;
			double scale;
			bool visible, castShadow, receiveShadow, doubleSided;
			void clear()
			{
				vertices.clear();
				normals.clear();
				edges.clear();
				uvs.clear();
				faces.clear();
			}
		};
		CONSTRUCT_3JS_CLASS(Geometry)
		std::wstring uuid, type;
		Data data;
	};
	typedef std::set<Geometry, compare_uuid<Geometry> > GeometrySet;

	// 一个rvtJson文件内，只有一个Object对象，内部有多个child,child内部有多个subChild
	/*
	"object":{
		"uuid": "",
		"name": "",
		"type": "",
		"matrix":[],
		"children":[
			{
				"uuid": "",
				"name": "",
				"type": "",
				"matrix": [],
				"children": [
					{
						"uuid": "",
						"name": "",
						"type": "",
						"matrix": [ ],
						"geometry": "",
						"material": ""
					},
				],
				"material": "",
				"userdata": {
				}
			},
		]
	}
	*/
	struct Object
	{
		struct Child
		{
			struct SubChild
			{
				CONSTRUCT_3JS_CLASS(SubChild)
				std::wstring uuid, name, type, geometry, material;
				MATRIX matrix;
				void clear() { matrix.clear(); }
			};
			typedef std::set<SubChild, compare_uuid<SubChild> > SubChildSet;
			CONSTRUCT_3JS_CLASS(Child)
			std::wstring uuid, name, type, material;
			MATRIX matrix;
			SubChildSet children;
			std::map<std::wstring, std::wstring> userData;
			void clear()
			{
				userData.clear();
				matrix.clear();
				children.clear();
			}
		};
		typedef std::set<Child, compare_uuid<Child> > ChildSet;

		std::wstring uuid, name, type;
		MATRIX matrix;
		ChildSet children;
	};

	// 一个materials数组由多个material组成
	/*
	"materials": [
		{
			"uuid": "",
			"name": "",
			"type": "",
			"color": 8421504,
			"ambient": 8421504,
			"emissive": 0,
			"specular": 8421504,
			"shininess": 1,
			"opacity": 1.0,
			"transparent": false,
			"wireframe": false
		},
	]
	*/
	struct Material
	{
		std::wstring uuid, name, type;
		int color, ambient, specular, emissive, shininess;
		double opacity;
		bool transparent, wireframe;
	};
	typedef std::set<Material, compare_uuid<Material> > MaterialSet;


	// 唯一一个
	/*
	"metadata": {
		"type": "",
		"version": 4.3,
		"generator": ""
	}
	*/
	struct Metadata
	{
		std::wstring type, generator;
		double version;
	};

}

namespace ShJs
{
	/* 上华简化Js文件格式如下
{
	"objs":[
		{
			"obj":{
				"id":"",
				"name":"",
				"type":"",
				"userData": {
				},
				"faces":[
				],
				"vertices": [
				],
				"edges": [
				],
			}
		},
		{},
	]
}
	*/

	const std::wstring SHJS_OBJECTS(_T("objects"));
	const std::wstring SHJS_PTLD(_T("ptLeftDown"));

	const std::wstring SHJS_LENGTH(_T("length"));
	const std::wstring SHJS_HEIGHT(_T("height"));
	const std::wstring SHJS_WIDTH(_T("width"));

	const std::wstring SHJS_OBJECT_ID(_T("id"));
	const std::wstring SHJS_OBJECT_NAME(_T("name"));
	const std::wstring SHJS_OBJECT_TYPE(_T("type"));
	const std::wstring SHJS_OBJECT_USERDATA(_T("userData"));
	const std::wstring SHJS_OBJECT_FACES(_T("faces"));
	const std::wstring SHJS_OBJECT_EDGES(_T("edges"));
	const std::wstring SHJS_OBJECT_VERTICES(_T("vertices"));

	struct Object
	{
		std::wstring id, name, type;
		std::vector<double> vertices, edges;
		std::vector<int> faces;
		std::map<std::wstring, std::wstring> userData;
		void clear()
		{
			userData.clear();
			faces.clear();
			edges.clear();
			vertices.clear();
		}
	};

	typedef std::vector<Object> Objects;

}