#include "Engine.h"



void Core::Engine::initRandomGenerator(std::default_random_engine gen, std::uniform_int_distribution<> distr) {
	this->gen = gen;
	this->distr = distr;
}


std::vector<glm::vec3> Core::Engine::genBubbleKeyPoints() {
	float random1 = this->distr(this->gen);
	float random2 = this->distr(this->gen);
	std::vector<glm::vec3> bubbleKeyPoints({
		glm::vec3(random1 , -this->skyboxVerticeParameter, random2),
		glm::vec3(random1 , this->skyboxVerticeParameter, random2)
		}
	);
	return bubbleKeyPoints;
};

void Core::Engine::generateBubbleArray() {
	for (int i = 0; i < 300; i++) {
		this->bubbleArray[i] = this->genBubbleKeyPoints();
	}
}

void Core::Engine::generateObjectArray() {
	std::uniform_int_distribution<> distr(-64, 64);
	for (int i = 0; i < 200; i++) {
		int random1 = distr(this->gen);
		int random2 = distr(this->gen);
		float height = -this->skyboxVerticeParameter + this->terrain.heightTable[abs(random1)][abs(random2)] + 15;
		this->objectArray[i] = glm::vec3(random1, height, random2) * glm::vec3(3, 1, 3);
	}
}

void Core::Engine::generateObjectSize() {
	std::uniform_real_distribution<> distr(0.1f, 0.25f);
	for (int i = 0; i < 200; i++) {
		float random = distr(this->gen);
		objectSize.push_back(random);
	}
}

void Core::Engine::generateObjectRotation() {
	std::uniform_real_distribution<> distr(0.0f, 360.0f);
	for (int i = 0; i < 200; i++) {
		float random = distr(this->gen);
		objectRotation.push_back(random);
	}
}

void Core::Engine::initBubbles() {
	this->generateBubbleArray();
}

std::vector<glm::vec3> Core::Engine::parse(std::string filename) {
	std::ifstream data(filename);
	std::string line;
	std::vector<glm::vec3> result;

	while (std::getline(data, line))
	{
		std::stringstream lineStream(line);
		std::string cell;
		glm::vec3 row;
		int i = 0;
		while (std::getline(lineStream, cell, ','))
		{
			switch (i % 3) {
			case 0:
				row.x = std::stof(cell);
				break;
			case 1:
				row.y = std::stof(cell);
				break;
			case 2:
				row.z = std::stof(cell);
				break;
			default:
				break;
			}
			i += 1;

		}
		result.push_back(row);
	}
	return result;
}