#include <LTBL/Light/LightSystem.h>
#include <LTBL/Light/Light_Point.h>
#include <LTBL/Utils.h>

#include <assert.h>
#include <SFML/Graphics.hpp>
#include <sstream>
int main(int argc, char* args[])
{   
      sf::VideoMode vidMode;
      vidMode.width = 800;
      vidMode.height = 600;
      vidMode.bitsPerPixel = 32;
      assert(vidMode.isValid());
      sf::RenderWindow win;
      win.create(vidMode, "Let there be Light - Demo");
      sf::View view;
      sf::Vector2u windowSize(win.getSize());
      view.setSize(sf::Vector2f(static_cast<float>(windowSize.x), static_cast<float>(windowSize.y)));
      view.setCenter(view.getSize() / 2.0f);
      // ---------------------- Background Image ---------------------
      sf::Texture backgroundImage;
      assert(backgroundImage.loadFromFile("data/background.png"));
      // Tiling background
      backgroundImage.setRepeated(true);
      sf::Sprite backgroundSprite(backgroundImage);
      backgroundSprite.setTextureRect(sf::IntRect(0, 0, vidMode.width * 2, vidMode.height * 2));
      backgroundSprite.setPosition(-400.0f, -400.0f);
      // --------------------- Light System Setup ---------------------
      ltbl::LightSystem ls(AABB(Vec2f(0.0f, 0.0f), Vec2f(static_cast<float>(vidMode.width), static_cast<float>(vidMode.height))), &win, "data/lightFin.png", "data/shaders/lightAttenuationShader.frag");
      // Create a light
      ltbl::Light_Point* testLight = new ltbl::Light_Point();
      testLight->m_intensity = 2.0f;
      testLight->m_center = Vec2f(200.0f, 200.0f);
      testLight->m_radius = 600.0f;
      testLight->m_size = 15.0f;
      testLight->m_spreadAngle = ltbl::pifTimes2;
      testLight->m_softSpreadAngle = 0.0f;
      testLight->CalculateAABB();
      testLight->m_bleed = 0.4f;
      testLight->m_linearizeFactor = 0.2f;
      ls.AddLight(testLight);
      testLight->SetAlwaysUpdate(true);
      // Create a light
      ltbl::Light_Point* testLight2 = new ltbl::Light_Point();
      testLight2->m_center = Vec2f(200.0f, 200.0f);
      testLight2->m_radius = 500.0f;
      testLight2->m_size = 30.0f;
      testLight2->m_color.r = 0.5f;
      testLight2->m_intensity = 1.5f;
      testLight2->m_spreadAngle = ltbl::pifTimes2;
      testLight2->m_softSpreadAngle = 0.0f;
      testLight2->CalculateAABB();
      ls.AddLight(testLight2);
      testLight2->SetAlwaysUpdate(false);
      // Create an emissive light
      ltbl::EmissiveLight* emissiveLight = new ltbl::EmissiveLight();
      sf::Texture text;
      if(!text.loadFromFile("data/emissive.png"))
          abort();
      emissiveLight->SetTexture(&text);
      emissiveLight->SetRotation(45.0f);
      emissiveLight->m_intensity = 1.3f;
      ls.AddEmissiveLight(emissiveLight);
      emissiveLight->SetCenter(Vec2f(500.0f, 500.0f));
      // Create a hull by loading it from a file
      ltbl::ConvexHull* testHull = new ltbl::ConvexHull();
      if(!testHull->LoadShape("data/testShape.txt"))
          abort();
      // Pre-calculate certain aspects
      testHull->CalculateNormals();
      testHull->CalculateAABB();
      testHull->SetWorldCenter(Vec2f(300.0f, 300.0f));
      testHull->m_renderLightOverHull = true;
      ls.AddConvexHull(testHull);
      // ------------------------- Game Loop --------------------------
      sf::Event eventStructure;
      bool quit = false;
      ls.m_useBloom = true;
      while(!quit)
      {
          while(win.pollEvent(eventStructure))
              if(eventStructure.type == sf::Event::Closed)
              {
                  quit = true;
                  break;
              }
          if(sf::Keyboard::isKeyPressed(sf::Keyboard::A))
              view.move(sf::Vector2f(-1.0f, 0.0f));
          else if(sf::Keyboard::isKeyPressed(sf::Keyboard::D))
              view.move(sf::Vector2f(1.0f, 0.0f));
          if(sf::Keyboard::isKeyPressed(sf::Keyboard::W))
              view.move(sf::Vector2f(0.0f, -1.0f));
          else if(sf::Keyboard::isKeyPressed(sf::Keyboard::S))
             view.move(sf::Vector2f(0.0f, 1.0f));
          sf::Vector2i mousePos = sf::Mouse::getPosition(win);
          //testLight2->IncCenter(ltbl::Vec2f(0.1f, 0.0f));
          // Update light
          testLight->SetCenter(Vec2f(static_cast<float>(mousePos.x), static_cast<float>(vidMode.height) - static_cast<float>(mousePos.y)));
          win.clear();
          win.setView(view);
          ls.SetView(view);
          // Draw the background
          win.draw(backgroundSprite);
          // Calculate the lights
          ls.RenderLights();
          // Draw the lights
          ls.RenderLightTexture();
          //ls.DebugRender();
          win.display();
      }
      win.close();
}