//
//  Game.h
//  SkyRoads
//
//  Created by Joshua Moerman on 12/22/12.
//  Copyright (c) 2012 Vadovas. All rights reserved.
//

#ifndef SkyRoads_Game_h
#define SkyRoads_Game_h

#include "myGL.h"

constexpr static const char* attributes[] = {
	"position",
	"normal",
	"color",
	"tex_coord0"
};

template <size_t N>
std::vector<std::string> from_strarray(const char* const (& strs)[N]) {
	std::vector<std::string> v(N);
	for(auto i = 0; i < N; ++i){
		v.push_back(strs[i]);
	}
	return v;
}

inline std::string getPath(std::string name, std::string kind) {
	return [[[NSBundle mainBundle] pathForResource:[NSString stringWithUTF8String:name.c_str()] ofType:[NSString stringWithUTF8String:kind.c_str()]] UTF8String];
}

struct Game{
	std::vector<gl::Vertex> triangle{
		{10.0, 0.0, 3.0, 1.0, 1.0, 1.0, 1.0},
		{-8.0, 5.0, -3.0, 1.0, 1.0, 1.0, 1.0},
		{-8.0, -5.0, 0.0, 1.0, 0.0, 1.0, 1.0}
	};
	J::shader basic_shader;
	
	Game()
	: basic_shader(getPath("basic_shader", "vsh"), getPath("basic_shader", "fsh"), from_strarray(attributes))
	{}
		
	void update(float dt){
		
	}	
	
	void draw(){
		GLKMatrix4 projectionMatrix = GLKMatrix4MakeOrtho(0.0, 768.0, 1024.0, 0.0f, -100, 100.0);
		GLKMatrix4 modelViewMatrix = GLKMatrix4MakeTranslation(50.0f, 50.0f, 0.0f);
		GLKMatrix4 modelViewProjectionMatrix = GLKMatrix4Multiply(projectionMatrix, modelViewMatrix);
		GLKMatrix3 normalMatrix = GLKMatrix3InvertAndTranspose(GLKMatrix4GetMatrix3(modelViewMatrix), NULL);
		
		basic_shader.begin();
		basic_shader.set_uniform("modelViewProjectionMatrix", modelViewProjectionMatrix.m, 0);
		basic_shader.set_uniform("normalMatrix", normalMatrix.m, 0);
		
		basic_shader.set_attribute("position", 3, GL_FLOAT, GL_FALSE, sizeof(gl::Vertex), &triangle[0][0]);
		basic_shader.set_attribute("color", 4, GL_FLOAT, GL_FALSE, sizeof(gl::Vertex), &triangle[0][3]);
		glDrawArrays(GL_TRIANGLE_STRIP, 0, triangle.size());
		basic_shader.end();
	}
};

#endif