#include "guecs.hpp"
#include "constants.hpp"

namespace guecs {
  UI::UI() {
    $font = make_shared<sf::Font>(FONT_FILE_NAME);
  }

  void UI::position(int x, int y, int width, int height) {
    $parser.position(x, y, width, height);
  }

  void UI::layout(std::string grid) {
    $grid = grid;
    $parser.parse($grid);
  }

  DinkyECS::Entity UI::entity(std::string name) {
    auto entity = $world.entity();
    $world.set<CellName>(entity, {name});
    return entity;
  }

  void UI::init(TexturePack& textures) {
    if($world.has_the<Background>()) {
      auto& bg = $world.get_the<Background>();
      bg.init();
    }

    $world.query<Background>([](auto, auto& bg) {
        bg.init();
    });

    $world.query<lel::Cell, Rectangle>([](auto, auto& cell, auto& rect) {
      rect.init(cell);
    });

    $world.query<Rectangle, Meter>([](auto, auto& bg, auto &) {
        bg.shape->setFillColor(ColorValue::BLACK);
    });

    $world.query<lel::Cell, Meter>([](auto, auto &cell, auto& meter) {
        meter.init(cell);
    });

    $world.query<lel::Cell, Textual>([this](auto, auto& cell, auto& text) {
      text.init(cell, $font);
    });

    $world.query<lel::Cell, Sprite>([&](auto, auto &cell, auto &sprite) {
        auto sprite_texture = textures.get(sprite.name);
        sprite.texture = sprite_texture.texture;
        sprite.sprite = make_shared<sf::Sprite>(*sprite.texture);
        sprite.sprite->setPosition({float(cell.x + 5), float(cell.y + 5)});
        auto size = sprite.texture->getSize();
        sprite.sprite->setScale({float(cell.w - 10) / size.x, float(cell.h - 10) / size.y});
    });
  }

  void UI::render(sf::RenderWindow& window) {
    if($world.has_the<Background>()) {
      auto& bg = $world.get_the<Background>();
      window.draw(*bg.shape);
    }

    $world.query<Rectangle>([&](auto, auto& rect) {
        window.draw(*rect.shape);
    });

    $world.query<lel::Cell, Meter>([&](auto, auto& cell, const auto &meter) {
        float level = std::clamp(meter.percent, 0.0f, 1.0f) * float(cell.w);
        // ZED: this 6 is a border width, make it a thing
        meter.bar.shape->setSize({std::max(level, 0.0f), float(cell.h - 6)});
        window.draw(*meter.bar.shape);
    });

    $world.query<Sprite>([&](auto, auto& sprite) {
        window.draw(*sprite.sprite);
    });

    $world.query<Textual>([&](auto, auto& text) {
        window.draw(*text.text);
    });
  }

  void UI::mouse(sf::RenderWindow &window) {
    if(sf::Mouse::isButtonPressed(sf::Mouse::Button::Left)) {
      sf::Vector2f pos = window.mapPixelToCoords(sf::Mouse::getPosition(window));
      $world.query<lel::Cell, Clickable>([&](auto ent, auto& cell, auto &clicked) {
        if((pos.x >= cell.x && pos.x <= cell.x + cell.w) &&
            (pos.y >= cell.y && pos.y <= cell.y + cell.h))
        {
          auto& cn = $world.get<CellName>(ent);
          clicked.action(ent, cn.name);
        }
      });
    }
  }

  Clickable make_action(DinkyECS::World& target, Events::GUI event) {
    return {[&, event](auto ent, auto&){
      target.send<Events::GUI>(event, ent, {});
    }};
  }
}