#include "imgui.h"
#include "imgui-SFML.h"
#define _USE_MATH_DEFINES
#include <math.h>
#include <fmt/core.h>
#include <SFML/Graphics/Texture.hpp>
#include <SFML/Graphics/RectangleShape.hpp>
#include <SFML/Graphics/CircleShape.hpp>
#include <SFML/Graphics/Text.hpp>
#include <SFML/Audio.hpp>
#include <SFML/Window/Event.hpp>
#include "sfmlgui.hpp"

using namespace ImGui;

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

void SFMLGui::ImGui_update() {
  sf::Vector2u size = window.getSize();

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

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

  Begin("Build Status", &window_active_out);

  TextColored(ImVec4(1,1,0,1), "Build Log");
  BeginChild("Scrolling");
    for(int n = 0; n < 50; n++) {
      TextWrapped("%04d: Some Text", n);
    }
  EndChild();
  End();
}

void SFMLGui::Window_update() {
    if(show_build_log) {
      SFML::Render(window);
    }
    window.display();
}

void SFMLGui::handle_events() {
  sf::Event event;

  // is this a main event loop
  while (window.pollEvent(event)) {
    if(show_build_log) {
      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)) {
          if(show_build_log) {
            window_active_out = false;
          } else {
            window.close();
          }
        } else if(sf::Keyboard::isKeyPressed(sf::Keyboard::Space)) {
          window_active_out = !window_active_out;
        }
        break;
      default:
        // do nothing
        break;
    }
  }
}


void SFMLGui::write_text(sf::Vector2f position, const char *content) {
  // hp text
  sf::Text text;
  text.setFont(font);
  text.setString(content);
  text.setCharacterSize(48);
  text.setFillColor(sf::Color(100, 250, 50));
  text.setPosition(position);
  window.draw(text);
}

void SFMLGui::update_entities() {
  window.clear();

  background.setPosition(0, 0);
  window.draw(background);

  sf::RectangleShape hp_bar({1920/2 - 18*2, 45.0f});
  hp_bar.setPosition({18, 434});
  hp_bar.setFillColor(sf::Color(100, 250, 50));
  window.draw(hp_bar);

  // hp text
  write_text({60, 363}, "100");
  // rounds text
  write_text({305, 363}, "222");
  // streaks text
  write_text({540, 363}, "333");
  // deaths text
  write_text({757, 363}, "444");

  if(show_build_log) {
    ImGui_update();
  }
  Window_update();

  show_build_log = window_active_out;
}

SFMLGui::SFMLGui() : window(sf::VideoMode(X_DIM, Y_DIM), "Turing's Tarpit", sf::Style::None, settings) {

}

void SFMLGui::startup() {
  fmt::print("Setting up a window for you...\n");
  settings.antialiasingLevel = 8;

  if(!font.loadFromFile("./assets/text.ttf")) {
    fmt::println("Cannot load font.");
  }

  window.setPosition({.x=0,.y=0});

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

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

bool SFMLGui::is_open() {
  return window.isOpen();
}

void SFMLGui::shutdown() {
  SFML::Shutdown();
}

int main() {
  auto gui = SFMLGui();

  gui.startup();

  while (gui.is_open()) {
    gui.handle_events();
    gui.update_entities();
  }

  gui.shutdown();
}