#include "imgui.h"
#include "imgui-SFML.h"
#define _USE_MATH_DEFINES
#include <math.h>
#include <fmt/core.h>
#include <SFML/Graphics/Sprite.hpp>
#include <SFML/Graphics/Texture.hpp>
#include <SFML/Graphics/RenderWindow.hpp>
#include <SFML/System.hpp>
#include <SFML/Audio.hpp>
#include <SFML/Window/Event.hpp>

using namespace ImGui;

constexpr int FPS=30;
constexpr int X_DIM = 1920 / 2;
constexpr int Y_DIM = 1080 / 2;
bool window_active_out = true;

void ImGui_setup(sf::RenderWindow &window) {
  bool res = SFML::Init(window);
  fmt::println("IMGUI returned {}", res);
}

void ImGui_update(sf::RenderWindow &window, sf::Clock &deltaClock, sf::Time &tick) {
  sf::Vector2u size = window.getSize();

  SFML::Update(window, deltaClock.restart());

  SetNextWindowPos(ImVec2(0, size.y / 2));
  SetNextWindowSize(ImVec2(size.x, size.y / 2));

  Begin("Turing's Tarpit", &window_active_out);

  // HP | Hits Taken | Round | Streak
  Text("HP X"); SameLine();
  Text("Hits Taken X"); SameLine();
  Text("Round X"); SameLine();
  Text("Streak X");
  // HP BAR
  float hp = 50.0f;
  SliderFloat("HP", &hp, 0.0f, 100.0f);
  // Build Log
  TextColored(ImVec4(1,1,0,1), "Build Log");
  BeginChild("Scrolling");
    for(int n = 0; n < 50; n++) {
      TextWrapped("%04d: Some Text", n);
    }
  EndChild();

  // image placeholder

  End();
}

void Window_update(sf::RenderWindow &window, sf::Sprite &player) {
    window.clear();
    window.draw(player);
    SFML::Render(window);
    window.display();
}

void Handle_events(sf::RenderWindow &window) {
  sf::Event event;

  // is this a main event loop
  while (window.pollEvent(event)) {
    SFML::ProcessEvent(window, event);

    switch(event.type) {

      case sf::Event::Closed:
        fmt::print("Exiting...\n");
        window.close();
        break;
      case sf::Event::KeyPressed:
        if(sf::Keyboard::isKeyPressed(sf::Keyboard::Escape)) {
          window.close();
        }
        break;
      default:
        // do nothing
        break;
    }
  }
}

sf::Time Update_entities(sf::RenderWindow &window, sf::Sprite &player, sf::Clock &clock, sf::Clock &deltaClock, sf::Time &tick) {
  sf::Vector2u winSize = window.getSize();
  float timeStep = 1.0f / FPS;
  sf::Time since = clock.getElapsedTime();
  sf::Time nextTick = since - tick > sf::seconds(1) ? since : tick;

  player.setPosition(winSize.x/2, 0);
  player.setScale({2.0f, 2.0f});

  ImGui_update(window, deltaClock, tick);
  Window_update(window, player);

  return nextTick;
}


int main() {
  fmt::print("Setting up a window for you...\n");

  sf::ContextSettings settings;
  settings.antialiasingLevel = 8;

  sf::RenderWindow window(sf::VideoMode(X_DIM, Y_DIM), "Turing's Tarpit", sf::Style::None, settings);
  window.setPosition({.x=0,.y=0});

  window.setFramerateLimit(FPS);
  window.setVerticalSyncEnabled(true);
  ImGui_setup(window);

  sf::Clock deltaClock;
  sf::Clock clock;
  sf::Time tick = clock.getElapsedTime();
  sf::Texture texture;
  sf::Sprite player;

  // fake image here
  if(!texture.loadFromFile("./assets/sprite.png")) {
    fmt::println("Error loading sprite!");
  }
  texture.setSmooth(true);
  player.setTexture(texture);

  while (window.isOpen() && window_active_out) {
    Handle_events(window);
    // preparing for refactoring this into a class or struct for everything
    tick = Update_entities(window, player, clock, deltaClock, tick);
  }

  SFML::Shutdown();
}