#include <iostream>
#include <memory>
#include "renderer.h"
#include "game.h"
#include "party.h"
#include "timer.h"
#include "map.h"
#include "mixer.h"
#include "transform_system.h"
#include "camera_system.h"
#include "animation_system.h"

void loop(Renderer& renderer, Mixer& mixer) {
  Game game;
  game.emplaceSystem<TransformSystem>();
  game.emplaceSystem<CameraSystem>();
  game.emplaceSystem<AnimationSystem>();

  Input keystate;

  auto map = std::make_unique<Map>("../res/map1.tmx", renderer);
  game.setMap(std::move(map));

  int lucasSprite = game.emplaceSprite();
  game.getSystem<TransformSystem>().initSprite(lucasSprite, {32, 32});
  game.getSystem<AnimationSystem>().initSprite(lucasSprite, "../res/lucas_anim.txt", renderer);

  int kumaSprite = game.emplaceSprite();
  game.getSystem<TransformSystem>().initSprite(kumaSprite, {32, 32});
  game.getSystem<AnimationSystem>().initSprite(kumaSprite, "../res/kuma_anim.txt", renderer);

  int dusterSprite = game.emplaceSprite();
  game.getSystem<TransformSystem>().initSprite(dusterSprite, {32, 32});
  game.getSystem<AnimationSystem>().initSprite(dusterSprite, "../res/duster_anim.txt", renderer);

  int boneySprite = game.emplaceSprite();
  game.getSystem<TransformSystem>().initSprite(boneySprite, {32, 32});
  game.getSystem<AnimationSystem>().initSprite(boneySprite, "../res/boney_anim.txt", renderer);

  Party party;
  party.addMember(game, lucasSprite);
  party.addMember(game, kumaSprite);
  party.addMember(game, dusterSprite);
  party.addMember(game, boneySprite);

  game.getSystem<CameraSystem>().setFollowingSprite(lucasSprite);
  game.getSystem<CameraSystem>().unlockCamera();

  renderer.render(game);

  Timer inputTimer(33);

  size_t lastTime = SDL_GetTicks();

  for (;;) {
    size_t currentTime = SDL_GetTicks();
    size_t frameTime = currentTime - lastTime;
    lastTime = currentTime;

    SDL_Event e;
    while (SDL_PollEvent(&e)) {
      if (e.type == SDL_QUIT || (e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_ESCAPE)) {
        return;
      } else if (e.type == SDL_KEYDOWN && (e.key.keysym.sym == SDLK_LSHIFT || e.key.keysym.sym == SDLK_RSHIFT)) {
        party.beginCrouch(game);
      } else if (e.type == SDL_KEYUP && (e.key.keysym.sym == SDLK_LSHIFT || e.key.keysym.sym == SDLK_RSHIFT)) {
        party.endCrouch(game);
      }
    }

    const Uint8* state = SDL_GetKeyboardState(NULL);
    keystate.left = state[SDL_SCANCODE_LEFT];
    keystate.right = state[SDL_SCANCODE_RIGHT];
    keystate.up = state[SDL_SCANCODE_UP];
    keystate.down = state[SDL_SCANCODE_DOWN];

    inputTimer.accumulate(frameTime);
    while (inputTimer.step()) {
      party.move(game, mixer, keystate);
    }

    for (System& system : game.systems()) {
      system.tick(frameTime);
    }

    renderer.render(game);
  }
}

int main(int, char**) {
  try
  {
    Renderer renderer;
    Mixer mixer;

    loop(renderer, mixer);
  } catch (const sdl_error& ex)
  {
    std::cout << "SDL error (" << ex.what() << ")" << std::endl;
  }

  return 0;
}