#include "Util.h"

#include "stdafx.h"

#include <fstream>
#include <string>
#include <iostream>
#include <iomanip>

#include "Exception.h"

namespace charcoal
{
	std::string Util::load_file(const std::string& path)
	{
		std::ifstream input_stream;
		try
		{
			input_stream.open(path);
		}
		catch (std::ios::failure& e)
		{
			throw EXCEPTION(std::string("Error Opening File: ") + e.what());
		}
		if (input_stream.is_open())
		{
			input_stream.seekg(0, std::ios::end);
			std::size_t size = input_stream.tellg();
			std::string buffer(size, ' ');
			input_stream.seekg(std::ios::beg);
			input_stream.read(&buffer[0], size);
			return buffer;
		}
		else
		{
			throw EXCEPTION("Unable to access file: " + path);
		}
	}

	void Util::set_console_position(short x, short y)
	{
		COORD pos = { x, y };
		HANDLE output = GetStdHandle(STD_OUTPUT_HANDLE);
		SetConsoleCursorPosition(output, pos);
	}

	void Util::print_matrix(const mat4& matrix)
	{
		std::cout << std::showpos << std::scientific << std::setprecision(5)
			<< "[ " << matrix[0][0] << " " << matrix[1][0] << " " << matrix[2][0] << " " << matrix[3][0] << " ]" << std::endl
			<< "[ " << matrix[0][1] << " " << matrix[1][1] << " " << matrix[2][1] << " " << matrix[3][1] << " ]" << std::endl
			<< "[ " << matrix[0][2] << " " << matrix[1][2] << " " << matrix[2][2] << " " << matrix[3][2] << " ]" << std::endl
			<< "[ " << matrix[0][3] << " " << matrix[1][3] << " " << matrix[2][3] << " " << matrix[3][3] << " ]" << std::endl;
	}

	void Util::print_vec(const vec2& v)
	{
		std::cout << std::showpos << std::fixed << std::setprecision(5)
			<< "[" << v.x << "]" << std::endl
			<< "[" << v.y << "]" << std::endl;
	}

	void Util::print_vec(const vec3& v)
	{
		std::cout << std::showpos << std::fixed << std::setprecision(5)
			<< "[" << v.x << "]" << std::endl
			<< "[" << v.y << "]" << std::endl
			<< "[" << v.z << "]" << std::endl;
	}

	void Util::print_vec(const vec4& v)
	{
		std::cout << std::showpos << std::fixed << std::setprecision(5)
			<< "[" << v.x << "]" << std::endl
			<< "[" << v.y << "]" << std::endl
			<< "[" << v.z << "]" << std::endl
			<< "[" << v.w << "]" << std::endl;
	}

	void Util::_check_gl_err(const char* file_name, int line)
	{
		GLenum gl_err = glGetError();
		if (gl_err != GL_NO_ERROR)
			throw Exception(("Caught OpenGL Error: " + std::string((const char*)gluErrorString(gl_err)) + " (" + std::to_string(gl_err) + ")").c_str(), file_name, line);
	}
}