#include "scene.hpp"
#include "animation.hpp"
#include <ranges>

const bool DEBUG=false;
const bool YOU_REMOVED_MID_CELL_IDIOT=false;

namespace scene {
  using namespace guecs;

   Element config_scene_element(nlohmann::json& config, bool and_play, bool duped) {
      std::string sprite_name = config["sprite"];
      auto st = textures::get_sprite(sprite_name, duped);

      float scale_x = config["scale_x"];
      float scale_y = config["scale_y"];
      float x = config["x"];
      float y = config["y"];

      // BUG: need to make animation optional
      auto anim = animation::load(sprite_name);
      if(and_play) anim.play();
      anim.scale_x = scale_x;
      anim.scale_y = scale_y;

      std::string cell = config["cell"];
      std::string name = config["name"];

      return {name, st, anim, cell, scale_x, scale_y, x, y};
  }

  Engine::Engine(components::AnimatedScene& scene) :
    $scene(scene)
  {
    for(auto& config : $scene.actors) {
      auto element = config_scene_element(config, false, false);
      dbc::check(!$actor_name_ids.contains(element.name),
          fmt::format("actors key {} already exists", element.name));
      $actors.push_back(element);
      $actor_name_ids.try_emplace(element.name, $actors.size() - 1);
    }

    for(auto& fixture : $scene.fixtures) {
      auto element = config_scene_element(fixture, true, true);
      $fixtures.push_back(element);
    }

    for(auto& line : $scene.layout) {
      $layout.append(line);
    }
  }

  void Engine::init() {
    $ui.position(SCREEN_WIDTH-BOSS_VIEW_WIDTH,0, BOSS_VIEW_WIDTH, SCREEN_HEIGHT);
    $ui.set<Background>($ui.MAIN, {$ui.$parser, THEME.TRANSPARENT});
    auto& background = $ui.get<Background>($ui.MAIN);
    background.set_sprite($scene.background, true);

    $ui.layout($layout);

    for(auto& actor : $actors) {
      actor.pos = position_sprite(actor.st, actor.cell,
          actor.scale_x, actor.scale_y, false, actor.x, actor.y);
    }

    for(auto& fixture : $fixtures) {
      fixture.pos = position_sprite(fixture.st, fixture.cell,
          fixture.scale_x, fixture.scale_y, false, fixture.x, fixture.y);
    }
  }

  bool Engine::mouse(float x, float y, Modifiers mods) {
    return $ui.mouse(x, y, mods);
  }

  void Engine::render(sf::RenderWindow& window) {
    $ui.render(window);

    for(auto& fixture : $fixtures) {
      window.draw(*fixture.st.sprite);
    }

    for(auto& actor : $actors) {
       window.draw(*actor.st.sprite);
    }

    if(DEBUG) $ui.debug_layout(window);
  }

  void Engine::move_actor(const std::string& actor, const std::string& cell_name) {
    auto& config = $actors.at($actor_name_ids.at(actor));
    config.cell = cell_name;
    config.pos = position_sprite(config.st, config.cell, config.scale_x, config.scale_y, YOU_REMOVED_MID_CELL_IDIOT);
  }

  void Engine::animate_actor(const std::string& actor) {
    auto& config = $actors.at($actor_name_ids.at(actor));
    config.anim.play();
  }

  void Engine::play_animations() {
    for(auto& fixture : $fixtures) {
      if(fixture.anim.playing) {
        animation::apply(fixture.anim, *fixture.st.sprite, fixture.pos);
      }
    }

    for(auto& actor : $actors) {
      if(actor.anim.playing) {
        animation::apply(actor.anim, *actor.st.sprite, actor.pos);
      }
    }
  }

  sf::Vector2f Engine::position_sprite(textures::SpriteTexture& st, const std::string& cell_name, float scale_x, float scale_y, bool at_mid, float x_diff, float y_diff) {

    auto& cell = $ui.cell_for(cell_name);
    float x = float(at_mid ? cell.mid_x : cell.x);
    float y = float(at_mid ? cell.mid_y : cell.y);

    sf::Vector2f pos{x + x_diff, y + y_diff};
    st.sprite->setPosition(pos);
    st.sprite->setScale({scale_x, scale_y});

    return pos;
  }
}