#pragma once

#include <iostream>
#include <cstdlib>
#include <chrono>
#include <cmath>
#include <vector>
#include <algorithm>

#include "basics.h"
#include "adaptions.h"

#include "simulation/Simulation.h"
#include "simulation/Beat.h"

using Vec2 = math::Vec2;
using LineKind = simulation::LineKind;

using ball_info = int;
using line_info = void;
using ball_type = simulation::Ball<ball_info>;
using line_type = simulation::Line<line_info>;
using simu_type = simulation::Simulation<ball_info, line_info>;

using note_info = Vec2;
using note_type = Note<note_info>;
using beat_type = Beat<note_info>;

struct AbstractLine {
	math::Vec2 starting_point;
	math::Vec2 end_point;
	int line_kind;

	const float hsize = 5.0f;
	
	AbstractLine() = default;

	AbstractLine(math::Vec2 starting_point, math::Vec2 end_point, int line_kind)
	: starting_point(starting_point)
	, end_point(end_point)
	, line_kind(line_kind)
	{}
	
	// create 6 lines, to emulate width, and rounded edges
	std::vector<line_type> calculate_lines() const {
		auto dir = normalize(end_point - starting_point);
		auto normal = rotate_ccw(dir);
		LineKind lk = static_cast<LineKind>(line_kind);
		
		if(line_kind == simulation::kOneWay){
			std::vector<line_type> ret;
			ret.emplace_back(starting_point + hsize*normal, end_point + hsize*normal, lk);
			ret.emplace_back(end_point + hsize*normal, end_point + hsize*dir, lk);
			ret.emplace_back(end_point + hsize*dir, end_point - hsize*normal, lk);
			ret.emplace_back(end_point - hsize*normal, starting_point - hsize*normal, lk);
			ret.emplace_back(starting_point - hsize*normal, starting_point - hsize*dir, lk);
			ret.emplace_back(starting_point - hsize*dir, starting_point + hsize*normal, lk);
			return ret;
		} else {
			std::vector<line_type> ret;
			ret.emplace_back(starting_point, end_point, lk);
			return ret;
		}
	}
};

BOOST_FUSION_ADAPT_STRUCT(
	AbstractLine,
	(::math::Vec2, starting_point)
	(::math::Vec2, end_point)
	(int, line_kind)
)

struct libwebsocket;
struct App{
	std::vector<User*> people_online;
	libwebsocket * uberclient{nullptr};

	simu_type sim;
	beat_type beat;

	const float iframerate = 1.0/60.0;
	int peopleuid{0};
	int balluid{0};

	App(){
		beat.notes.emplace_back(note_type::kQuarterNote, note_info{100.0f, 100.0f});

		AbstractLine line(Vec2{50.0f, 100.0f}, Vec2{150.0f, 200.0f}, simulation::kOneWay);
		add_line(line);
	}

	void add_line(AbstractLine const & line){
		for(auto & l : line.calculate_lines()){
			sim.lines.push_back(l);
		}
	}

	void login(User& user){
		user.index = peopleuid++;
		people_online.push_back(&user);
	}

	void logout(User& user){
		people_online.erase(std::remove(people_online.begin(), people_online.end(), &user), people_online.end());
	}

	void update(){
		float dt = iframerate;
		sim.update(dt);
		
		for(auto n : beat.update(dt)){
			sim.balls.emplace_back(n.x, n.y, 0, 0, balluid++);
		}
	}
};