#include "map.h"
#include <tmxlite/Map.hpp>
#include <tmxlite/Layer.hpp>
#include <tmxlite/TileLayer.hpp>
#include <tmxlite/Tileset.hpp>
#include "renderer.h"

Map::Map(std::string_view filename, Renderer& renderer) {
  tmx::Map mapfile;
  if (!mapfile.load(filename.data())) {
    throw std::invalid_argument("Could not find map file: " + std::string(filename));
  }

  const tmx::Vector2u& mapSize = mapfile.getTileCount();
  mapSize_.x() = mapSize.x;
  mapSize_.y() = mapSize.y;

  const tmx::Vector2u& tileSize = mapfile.getTileSize();
  tileSize_.x() = tileSize.x;
  tileSize_.y() = tileSize.y;

  int firstGID = 0;
  // There should only be one tileset.
  for (const tmx::Tileset& tileset : mapfile.getTilesets()) {
    firstGID = tileset.getFirstGID();
    tilesetTextureId_ = renderer.loadImageFromFile(tileset.getImagePath());
    tilesetColumns_ = tileset.getColumnCount();
  }

  for (const auto& layer : mapfile.getLayers()) {
    if (layer->getType() == tmx::Layer::Type::Tile) {
      const auto& tileLayer = layer->getLayerAs<tmx::TileLayer>();

      std::vector<Tile> tilesToStore;

      for (const auto& maptile : tileLayer.getTiles()) {
        tilesToStore.push_back(Tile {
          .id = maptile.ID - firstGID,
          .flipHorizontal = (maptile.flipFlags & tmx::TileLayer::Horizontal) != 0,
          .flipVertical = (maptile.flipFlags & tmx::TileLayer::Vertical) != 0 });
      }

      layers_.push_back(std::move(tilesToStore));
    }
  }
}